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ActiveDirectory

Active Directory

    Code: GetGroups

    Get the list of groups in a domain and return as an ArrayList.

    Code: ListDomainNames

    Gets a list of Domain names the user can see on the network.

    HowTo: Logon Types

    4 Ways to Logon using WinNT structures for ADSI (ActiveDirectory).

    Code: getComputerProperties

    Gets properties for the WinNT Computer in the specified domain

    Code: getGroupMembers

    Gets members in the WinNT AD group

    Code: getGroupProperties

    Gets properties for the WinNT AD Group

    Code: getGroupTypeFlags

    Get the Type of Group it is

    Code: getLoginHours

    Function for getting the loginHours for a given user and translating them to the actual login hours for the local time

    Code: getUserFlags

    Function for getting the UserFlags specified by the integer returned in the UserFlags Property

    Code: getUserProperties

    Gets properties for the WinNT AD user

    Code: getUsers

    Retrieves a list of users in the specified domain

    Code: convertByteToSidString

    Converts the Byte array to the SID string without the API

    Code: convertSIDToStringAPI

    API for "ConvertSidToStringSid"

    Code: getGroupsUserIsMemberOf

    Gets groups the WinNT AD user is a member of and returns the Primary Group for the user

ADO.NET

Example code, classes, routines and tips for working with ADO.NET.

    General

    General code and examples for working with ADO.NET

        Snippet: Add a DataTable to a DataSet

        Example of creating a DataTable and adding it to a DataSet object.

        Snippet: Create a DataTable with Constraints, Keys, etc.

        This example demonstrates how to create a DataTable with keys constraints, and defaults.

        Snippet: Creating a DataTable

        Example of creating a DataTable in code.

        Code: DataSetFromXML

        Populate a DataSet from an xml file.

        Code: DataSetToXML

        Save a DataSet to an XML file.

        Code: DataSetToXMLString

        Instantiate and save DataSet contents in xml format.

        Code: IsDSPopulated

        Test a DataSet to see if it contains data.

        Snippet: RecordCount

        Get the count of records/rows in a dataset table.

        Code: CSVHelper

        Code to read a CSV (comma separated value) file and return a Dataset.

    OleDB

    Code and examples for working with OLEDB datasources using ADO.NET

        Code: GetDataReader

        Create and return a DataReader given a valid connection and SQL statement.

        Code: GetDataSet

        Create and return a DataSet given a valid connection string and SQL statement.

        Code: GetDataSetFromExcel

        Returns a DataSet from the specified range in the specified Microsoft Excel worksheet.

        Code: GetMultiDataSet

        Create and return a multi-table DataSet given a valid connection string and an array of tables.

        Code: GetScalarValue

        Returns a single value given a connection string, table, and column name.

        Code: OleDbDataToXML

        Converts OLEDB data to XML format.

        Code: GetFieldByName

        Code to demonstrate how to access data in an OLEDBDataReader using a field name.

    SQL Server

    Code and techniques for working with SQL Server objects and data in ADO.NET.

        Snippet: Connection-Based Transaction Example

        Example of using a connection-based transaction to update data in two tables.

        Code: GetDataReader

        Create and return a DataReader given a valid connection and SQL statement.

        Code: GetDataSet

        Create and return a DataSet given a valid connection string and SQL statement.

        Code: GetMultiDataSet

        Create and return a multi-table DataSet given a valid connection string and an array of tables.

        Code: GetScalarValue

        Returns a single value given a connection string, table, and column name.

        Snippet: Getting a Stored Procedure's Output Parameters

        Example of capturing output parameters from a stored procedure.

        Snippet: Getting a Stored Procedure's Return Value

        Example of capturing the return value from a stored procedure.

        Snippet: ReadBLOB

        Read a BLOB of data from a column.

        Snippet: ReadBLOBWithDS

        Read a BLOB of data with a dataset object.

        Snippet: ShowMultiDataSetRelated

        Example of a multi-table DataSet with relations created between tables that are related in the source database.

        HowTo: ShowNestedDataSet

        This example illustrates how to create and navigate through nested recordsets.

        Snippet: Simple Delete Example

        This illustrates a simple way to execute a delete command against a SQL Server table.

        Snippet: Simple Insert Example

        This illustrates a simple way to execute an insert command against a SQL Server table.

        Snippet: Simple Stored Procedure Example

        Example of executing a stored procedure with no parameters.

        Snippet: Simple Stored Procedure with Parameters

        Simple example of getting data from a stored procedure using input parameters.

        Snippet: Simple Update Example

        This illustrates a simple way to execute an insert command against a SQL Server table.

        Snippet: Sort and Filter a DataTable

        Example of sorting a table in a DataSet by different columns.

        Code: SqlDataToXML

        Return SQL data as XML.

        Snippet: Stored Procedure Update Example using Parameters

        Example of using a stored procedure that updates data and requires input parameters.

        Snippet: Table and Column Mappings Example

        Example of using table and column mappings to customize the names of a DataSet's tables and columns.

        Snippet: Update Data from a DataSet

        Example of how to update a data source from a DataSet populated from it.

        Snippet: Update Data with only a DataSet's Modified Data

        Example code to Update Data with only a DataSet's Modified Data.

        Snippet: Update from a DataSet using a Stored Procedure

        Example code to Update from a DataSet using a Stored Procedure

        Snippet: Update from a DataSet with Auto-Generated Commands

        Example code to Update from a DataSet with Auto-Generated Commands

        Snippet: WriteBLOB

        WriteBLOB demonstrates how to write image data to a SQL Server table.

        Snippet: WriteBLOBWithDS

        WriteBLOBWithDS demonstrates how to write image data to a SQL Server table using a DataSet object.

        Snippet: XML from a Stored Procedure to a File

        Example of writing the XML returned from a stored procedure to a file. This example uses the GetProductXML proc in Northwind.

        SQLDMO

        Code for working with SQLDMO, the object model for SQL Server

            Code: ListSQLServers

            Get a list of available SQL Servers in the current domain.

        Code: DynamicCrosstabQueries

        SQL code for creating dynamic crosstab queries.

        HowTo: GetImagePathIntoDatabase

        Gets an image from a file, and updates the path in your SQL Server database, then loads the picture into the picturebox on a form.

        Other: AuditCheck.SQL

        SQL Script to generate Auditing functionality on a SQL Server table.

    ADO Demos

    Standalone procedures demonstrating ADO coding techniques

        Code: ColumnComputeAndExpression

        Demonstrate ADO computed columns and data column expressions

        Code: CreateRunTimeTable

        Demonstrate creating and using a datatable at run-time

        Code: CreateRunTimeTableCloneCopyImportMerge

        Demonstrate the ADO Clone, Copy, Import and Merge features

        Code: DataTableFilterByRowState

        Demonstrate filtering rows in a datatable by their state

        Code: DataViewFind

        Demonstrate finding a DataRowView in a DataView

        Code: FillTableSelect

        Demonstrate using a Data Adapter to fill a DataTable using a SQL Select statement

        Code: FillTableSelectWithParameter

        Demonstrate using a Data Adapter to fill a DataTable using a SQL Select statement that includes parameters

        Code: FillTableWithProc

        Demonstrate using a Data Adapter to fill a DataTable using a SQL stored procedure

        Code: FillTableWithProcInputParams

        Demonstrate using a Data Adapter to fill a DataTable using a SQL stored procedure with input parameters

        Code: FilterWithDataView

        Demonstrate using a DataView to filter rows from a DataTable

        Code: GetDataAdapterSchemaInfo

        Demonstrate using an ADO DataAdapter to retrieve schema information about a table

        Code: GetDataReaderSchemaInfo

        Demonstrate using an ADO DataReader to retrieve schema information about a table

        Code: GetOleDBSchemaInfo

        Demonstrate using an ADO connection to retrieve OLE schema information

        Code: ProcCommandParameters

        Demonstrate using stored procedures with parameters with a command object, and re-executing with new parameter values

        Code: ProcFillMultipleTables

        Demonstrate filling multiple DataTables in a dataset with the results of a call to a stored procedure

        Code: ProcFillRelatedTables

        Demonstrate filling a DataSet with multiple tables and creating relationships between them

        Code: RelatedTablesExpressions

        Demonstrate using expressions to refer to related data

        Code: TableSelectRows

        Demonstrate using a DataTable's Select method to select a subset of rows matching a condition

    BusinessLayerSample

    A class that....

        Other: CreateBooksProcs.sql

        T-SQL script to create stored procedures required by the BusinessLayerSample class

        Other: CreateLibraryProcs.sql

        T-SQL script to create stored procedures required by the BusinessLayerSample class

        Other: CreateLibraryTables.sql

        T-SQL script to create the tables and relationships required by the BusinessLayerSample class

        Class: BusinessLayerSampleObject

        Sample Business Layer class to show retrieval and update of data

        Code: TestBusinessLayerSampleObject

        Test procedure to demonstrate the use of the BusinessLayerSampleObject class

    Data Utilities

    Various data utilities for ADO.NET

        Code: AddOutputParameter

        Add an output parameter to the parameters collection

        Code: AddOutputParameter

        Add an output parameter to a parameters collection, specifying the parameter's type

        Code: CreateParam

        Create and return a parameter for a parameters collection

        Code: SetDataTablePrimaryKey

        Specify the primary key of a datatable

        Code: SetDataTablePrimaryKey

        Specify the primary key for a datatable, optionally specifying that the key is an autoincrementing type

        Code: TimestampsDiffer

        Code to determine whether two timestamps are different

        Code: ValuesDiffer

        Code to determine whether two objects are different

    Databinding

        Code: Form and control databinding example

        This form demonstrates databinding to a datatable on a form as well as databinding for comboboxes

    Collections

        Article: Run-Time-Created DataTables

        Tip: Use Run-Time-Created DataTables in place of collections.

    AccessHelper

    Code and examples for working with Access datasources using ADO.NET

        Code: ExecuteDataset

        Methods to execute OleDbCommands that return a resultset.

        Code: ExecuteNonQuery

        Methods to execute OleDbCommands that return no resultset.

        Code: ExecuteReader

        Methods to Create and prepare a OleDbCommand, and call ExecuteReader with the appropriate CommandBehavior.

        Code: ExecuteScalar

        Methods to execute a OleDbCommand against a specified database specified.

        Code: Utility Methods and Constructors

        Utility Methods and Constructors for working with Access datasources using ADO.NET.

    Monitor Access or Jet Connections

    Code and examples for listing connections on Access or Jet databases

        Class: JetWatcher

        Class to list connections to an Access/Jet database

        Code: JetWatcher Example Form

        Example form that shows how to use the JetWatcher class

    ParameterQueryBuilder

    Code and example for building parameterized ADO.NET queries.

        Code: ParameterQueryBuilder

        Assists building parameterized ADO.NET queries.

        HowTo: ParameterQueryBuilder Example

        Example for the ParameterQueryBuilder class.

    QueryReader

    Code and examples for filling an ADO.NET dataset in batches, and pausing a long-running query.

        Code: Example Form for QueryReader

        Example form for using the QueryReader class to fill an ADO.NET dataset in batches, and pause a long-running query.

        Class: QueryReader Class

        Code for filling an ADO.NET dataset in batches, and pausing a long-running query.

    ADO Interface Code and Example

    Code and example that creates and consumes a generic IDbConnection and IDataAdapter object.

        Class: ADO Interface Class

        Shows a generic business layer method that creates and consumes a generic IDbConnection and IDataAdapter object.

        Item: ADO Interface Sample Form

        Example form for the ADO Interface class.

    TableBuilder

    Code and example for building a DataTable from scratch. Add columns, specify primary keys, set default values, and more.

        Code: Example Form for TableBuilder

        Example form for using the TableBuilder class to create a DataTable from scratch.

        Class: TableBuilder Class

        Code for creating a DataTable from scratch. Add columns, specify primary keys, set default values, and more.

ASP.NET

Code, examples, and information for working with Active Server Pages.NET.

    General

    General techniques in ASP.NET.

        HowTo: Change Page Background Color

        Change an HTML page's background color

        HowTo: GridLayout vs. FlowLayout

        HowTo: Scrollable Controls

        Snippet: Simple Browser Capabilities Utility

        Use basic ASP.NET code to get browser capabilities

        HowTo: Upload Files Larger than 4mb

        Module: Data Binding

        How to access controls in DataList Header & Footer

        Module: Upload and Download by Streaming

        This code sample demonstrates how to upload and download files in ASP.NET by streaming.

    Authentication

    Code, examples, and techniques for working with Authentication in ASP.NET.

        HowTo: Authentication for Different Pages/Directories

        Authentication for Different Pages/Directories

        HowTo: Configuring Forms Authentication

        HowTo: Configuring Passport Authentication

        HowTo: Configuring Windows Authentication

        How to configure Windows Authentication

        Snippet: How to Reference the Authenticated Users Name

        How to Reference the Authenticated User's Name

        Code: LoginFormsAuth

        This method contains the basic steps required to authenticate a user using Forms authentication.

        Code: LogoutFormsAuth

        Basic code necessary to log the current user out of the application when using Forms authentication.

        Code: WindowsAccountDetails

        Saves the properties of the current user authenticated with windows authentication to a collection.

    Client-Side Behavior

    Code, examples, and notes for working with web browsers using client-side code.

        HowTo: Add Client-Side Script to a Page from ASP.NET

        HowTo: Adding Client Script to a Form

        Snippet: Disable Context Menu in the Browser

        Use the context menu event to disable the right-click menu.

        Snippet: Open a Page from a Popup Window

        Javascript code to open a page.

        HowTo: Prompt User before Button Submits a PostBack

        Snippet: Show a Message Box from a Button

        Use the Javascript Alert function.

        Snippet: Using DHTML Effects with Web Server Controls

    Configuration

    Techniques for configuring ASP.NET applications.

        HowTo: Always Show the ASP.NET Error Page

        HowTo: Configuring ASP.NET Tracing

        How to set up ASP.NET Tracing

        HowTo: Handling Errors with Custom Redirects

        HowTo: Handling Errors with Default Redirects

        HowTo: Smart Navigation

        Information about the ASP.NET SmartNavigation feature to control adding pages to the browser's cache.

    Managing State

    Code, examples, and notes for managing state in ASP.Net applications.

        Code: Cookieless Sessions

        HowTo: Overview of Session State Configuration

        Code: ShowCachedItems

        Iterate and display all items in the ASP.NET application's cache.

    Security

    Code and notes for working with ASP.NET security

        Article: ASP.NET Security Overview

    Server Controls - Basics

        HowTo: Adding Events to Controls

        HowTo: Applying Styles

        Snippet: Creating a Password-Masked TextBox

        Code: Iterate Through Web Form Controls

        Use the controls collection to iterate all controls on a web form.

    Server Controls - Data Binding

        Repeated-Value Controls

            Article: Data-Binding Expressions

            DataGrid

                HowTo: Use AlternatingItemStyle on a DataGrid

                Define a data grid style that uses different background colors for every other row.

                Example of Binding, Paging, and Sorting

                This example demonstrates how to bind to multiple data sources using a single web form and DataGrid, and how to implement paging and sorting in the grid.

                    WebForm: DataGridBind.aspx

                    Class: DataGridBind.aspx.vb

                Example of Editing Data

                    WebForm: DataGridEditBound.aspx

                    Class: DataGridEditBound.aspx.vb

                Example of Filtering Data

                Shows how to filter data on a datagrid control.

                    WebForm: DataGridFilter.aspx

                    Class: DataGridFilter.aspx (Code behind)

                Example of Finding Data

                Shows how to find data on a datagrid control.

                    WebForm: DataGridFind.aspx

                    Class: Code behind for DataGridFind.aspx

            DataList

                HowTo: Use AlternatingItemStyle on a data list control

                Define a data list style that uses different background colors for every other row.

                Example of Binding a DataList to a DataTable

                    Class: Code behind for DataListDataTable.aspx

                    WebForm: DataListDataTable.aspx

                Example of Binding a DataList to a HashTable

                How to bind a datalist object to a hashtable object.

                    Class: Code behind for DataListKeyValue.aspx

                    WebForm: DataListKeyValue.aspx

                Example of Binding a DataList to Arrays

                How to bind a datalist object to an array object.

                    Class: Code behind for DataListArray.aspx

                    WebForm: DataListArray.aspx

            DropDownList

                HowTo: Firing the SelectedIndexChanged Event

                Example of Binding a DropDownList

                How to bind data to a dropdownlist control.

                    Class: Code behind for ControlsDemo.aspx

                    WebForm: ControlsDemo.aspx

        Single-Value Controls

            HowTo: Binding to a Function

            HowTo: Binding to Another Control

    Caching

    Articles, How-To's, and code for how to use caching to create high-performance Web applications.

        Application Data Caching

        Code, How-To's, and Articles for using Application Data Caching.

            Article: Add

            Adding items to the cache with the Add and Insert methods.

            Article: Cache Item Removed Event

            Using the Cache Item Removed Event.

            Article: Delete

            Using the Remove method to delete items from cache.

            Article: Retrieve

            Binding a grid to data from cache.

        Output Caching

        Code, How-To's, and Articles for using Output Data Caching.

            Article: Fragment Caching

            Fragment Caching to store a version of the control in the output cache.

            Article: Page Caching

            Setting an expiration for the cached output of a dynamically generated page.

        Module: Webservice with Caching

        This module demonstrates how an ASP.NET Webservice can be cached for performance.

    Validation Web Server Controls

    Examples for using ASP.NET's Validation Web Server controls.

        WebForm: Compare Validator Control

        This example shows how to use the Compare Validator Control.

        WebForm: Custom Validator Control

        This example shows how to use the Custom Validator Control.

        WebForm: Range Validator Control

        This example shows how to use the Range Validator Control.

        WebForm: Regular Expression Validator Control

        This example shows how to use the Regular Expression Validator Control.

        WebForm: Required Field Validator Control

        This example shows how to use the Required Field Validator Control.

        WebForm: Validation Summary Control

        This example shows how to use the Validation Summary Control.

    Mobile Web Development

    Code for Mobile Web Development

        WebForm: Simple Mobile Web Page

        Simple Mobile Web Page Using mobile:Link, mobile:Label, mobile:PhoneCall and mobile:ObjectList Controls

    Delete Confirmation Code and Examples

    Code and example for prompting users to confirm delete operations in ASP.NET.

        HowTo: Delete Confirmation

        Code for prompting users to confirm delete operations in ASP.NET.

        Delete Confirmation Example

         Example for prompting users to confirm delete operations in ASP.NET.

            Item: WebForm1.aspx Code

            Example for prompting users to confirm delete operations in ASP.NET.

            Item: WebHelper Code

            Example for prompting users to confirm delete operations in ASP.NET.

    ASP.NET ModalDialog

    Shows how to create a Modal Dialog, and return values to the parent page.

        Class: ASP.NET ModalDialog Base Page

        SubClass Page class to support ModalDialog window

        Class: Code Behind WebForm1.aspx

        Code behind the Popup Window (WebForm1.aspx)

        Class: Code Behind WebForm2.aspx

        Code behind the WebForm that opens the Popup Window (WebForm2.aspx)

        WebForm: WebForm1.aspx

        Popup Window

        WebForm: WebForm2.aspx

        Web Form to open Popup Window

    User Controls

        WebTreeControl

        Server-Side tree control

            Module: AssemblyInfo

            TestWebTreeControl

            Simple WebForm to demonstrate the usage of WebTreeControl.

                Class: Code behind for Global.asax

                Class: Code Behind for Index.aspx

                WebForm: Index.aspx

                XML: Microsoft Games.xml

                Sample data file

            Class: WebTreeControl

            Web Control (Visible to Designer)

            Class: WebTreeNode

            Represents a single node in the tree control.

    IE WebControls

    Code, Tips, and Tricks for using IE Web Controls.

        Article: How to Install Internet Explorer Web Controls

        How to Install Internet Explorer Web Controls

        WebForm: MultiPage WebControl Example

        MultiPage WebControl Example

        WebForm: TabStrip WebControl Example

        TabStrip WebControl Example

    HowTo: Repair IIS Mappings to ASP.NET

    Steps to repair IIS mappings to ASP.NET.

    DataGrid Customization

    ASP.NET DataGrid Customization

        Code: Highlight and Select Row with JavaScript

        ASP.NET DataGrid Customization: Highlight and Select Row with Client-side JavaScript

Data Structures

    Enumerations

    Enumerations

        Code: Text File to Enumeration

        Code to open a text file and read it into an enumeration.

General .NET Programming

General .NET Programming Techniques

    Keyboard

    Code for working with the Keyboard in .NET.

        Code: EatKeystrokes

        Prevent a control from seeing specific keystrokes

        Windows 32 Keyboard

        Work with keyboard attributes through WMI.

            Code: GetKeyboardInfo

            Gets Keyboard properties

            Code: GetKeyboardDeviceID

            Gets the DeviceID for the Keyboard. Needed for all other Keyboard information.

    Processes

    Code for working with Processes

        Code: RunProgram

        Run an external program.

        Code: ShowRunningProcesses

        Show all processes running on this machine.

        Code: ShowRunningUIProcesses

        Show all processes running on this machine that have created UI (i.e. have windows)

        Code: WaitForProcess

        Wait for a process to finish

        Code: TimeoutWaitForProcess

        Wait for a process for a specified period of time.

        Code: CountOfApplicationInstances

        Return a count of the running instances of the current application.

        Class: FormWindowsTimerManyTimers

        This form contains example code that illustrates how efficient Windows.Forms.Timer objects are.

        Code: IsAppRunning

        Check to see if another instance of the current application is already running.

        Code: BatchFileResults

        Launch an external command and get the results.

    Miscellaneous

    Miscellaneous items for general .NET programming.

        HowTo: Build an Evaluate Function

        How to create a replacement for the VB Eval() function

        Class: ClearConsole

        Code to clear the console in a Console application

        HowTo: Detect if Code is Running from the IDE

        Detect if Code is Running from the IDE

        Code: GetWinVer

        Return a string with information about the current Windows Version

        Article: Calling Objects with Optional Parameters from C#

        Tip: How to call a COM or VB.NET method with optional parameters from C#.

        Article: Overloading on Overloads

        Overloading on Overloads

        Article: TypeCastingInVB

        Type Casting in Visual Basic .NET

    Data Structures

        Arrays

            Snippet: ArrayList as a Substitute for an Array

            Snippet: Iterating through an Array

            Snippet: Join and Split Strings Example

            Code: ReadOnlyArray

            Snippet: Searching an Array

        Collections

            Code: ArrayToStringCollection

            Class: GenericCollection

            Snippet: SimpleCollection

            Code: StringCollectionToArray

            Article: Debugging Collections

            Debugging Collections in Your Visual Studio .NET Applications

    Files, Disks and Folders

    Code for working with Windows Files, Disk, and Folders

        General

            Code: CopyFiles

            Copies all files from the specified source directory to the specified destination directory.

            Snippet: ListEnvironmentVars

            Enumerate Environment Variables using a HashTable

            Code: EraseDirectory

            Deletes all items in a directory, including sub dirs and sub dir files and the deletes the directory itself.

            Code: GetLocalDrives

            Use the System.Management classes to invoke WMI to get a list of local drives.

            Code: GetNetworkAdapters

            Use the System.Management classes to invoke WMI to get a list of network adaptors.

            Code: GetWindowsVersionInfoFromDotNet

            Returns information about the Windows OS version using the .Net libraries.

            Code: PrintDirectoryTree

            Recursively prints a list of directories to the console.

            Code: RecursiveCopyFiles

            Recursively copy all files and subdirectories from the specified source to the specified destination.

            Code: RecursiveSearchForFiles

            Search for files matching the specified pattern in the specified directory and all its children.

            Snippet: Using System.IO.Path

            Examples showing how to use the System.IO.Path library to work with paths.

            Code: WriteFile

            Use a FileStream to write a new file.

            Code: WriteToTempFile

            Writes the specified text to a temp file and returns the temp file path and name

            Class: UNCDrives

            A class to show a how to get the UNC mapping from a drive letter.

            Code: ChangeFileNameFromReadOnly

            Remove the readonly attribute from the specified file.

            Code: ReturnFileNameAsDate

            Generate a new file name based on the current date and time.

            Code: ReadFile

            Open the specified file and return its contents as a string.

            Class: GetWindowsVersionInfoFromAPI

            Code: GetRunningProcesses

            Use the System.Management classes to invoke WMI to get a list of running processes.

            Code: ListComputersOnNetwork

            Returns a list of all computers on the network and places the results in a listview.

        Directory and File Info

        Directory and File operations

            Code: AppendToFile

            Append Text to a file

            Code: CreateDir

            Creates a directory and returns DirectoryInfo Structure for it.

            Code: CreateFile

            Create a file

            Code: DeleteDir

            Deletes a directory with options to delete subdirectories and files recursively.

            Code: DeleteFile

            Delete a file

            Code: DirExists

            Check for existence of a directory

            Code: FileExists

            Check for the existence of a file

            Code: GetCurrentAppDir

            Gets the directory the application is open from

            Code: GetDirectoryAttributes

            Returns the attributes of any given directory as a string

            Code: GetDirsInPattern

            Get a list of directories matching a specific search pattern.

            Code: GetDirsInPatternRecursive

            Recursively get a list of directories and subdirectories matching a specified pattern.

            Code: GetFileAttributes

            Get the attributes of a file.

            Code: MoveDir

            Moves a directory from one location to another.

            Code: MoveFile

            Move an existing file to another location

            Code: OpenFileForWrite

            Create a file and write to it.

            Code: OpenFileWithParameters

            Open a File by specifying specific parameters.

            Code: PopulateDirectories

            Populates a TreeView Control with the directories of the drive you specify. This is a Recursive function.

            Code: CompareFiles

            Compare to files, byte by byte

            Code: EnsureNoTrailingSlash

            Code to ensure that there is no backslash between the end of the path and the file name.

            Code: EnsureTrailingSlash

            Code to ensure that there is a backslash between the end of the path and the file name.

        Logical Disk

        Logical Disk information using the WMI Management structure

            Code: GetDeviceID

            Code: GetDriveType

            Gets the DriveType using System.Management and Win32_LogicalDisk

            Code: GetFileSystem

            Code: GetMaximumComponentLength

            Code: GetMediaType

            Code: GetName

            Code: GetQuotasDisabled

            Code: GetQuotasIncomplete

            Code: GetQuotasRebuilding

            Code: GetSize

            Code: GetSupportsDiskQuotas

            Code: ChkDsk

            Code: GetAllDrivePropertiesAvailable

            Code: GetCaption

            Code: GetCompressed

            Code: GetDescription

            Code: GetSupportsFileBasedCompression

            Code: GetSystemName

            Code: GetVolumeDirty

            Code: GetVolumeName

            Code: GetVolumeSerialNumber

        FlatFileBuilder

        Utility collection class to assist in creating fixed-column width flat text files.

            Code: FlatFileBuilder

            Contains the FlatFileBuilder collection class and the FlatFileColumn Class.

            Snippet: FlatFileBuilder Demo

            Demo for the FlatFileBuilder class.

    HTTP and FTP

    Code for working with HTTP and FTP protocols.

        Code: DNSResolveLocalHost

        Code: GetIPAddress

        Code: LaunchURL

        Code: LaunchURLWithChecks

        Code: MakeHTTPGetRequest

        Code: ResolveHost

        Code: WebBrowserToDefaultPage

    Mail

        Snippet: Send Email

        Code: ComposeMail

        Launch the default email client to send mail.

    Math

        Code: GenRandom

        Code: GenRandomBounded

        Code: IsCloseTo

        Fuzzy Match

        MathAreaVolume

        This category contains mathematical functions for determining the area and volume of various objects.

            Code: AreaOfCircle

            Returns the area of a circle

            Code: AreaOfRectangle

            Returns the area of a rectangle

            Code: AreaOfRing

            Returns the area of a ring

            Code: AreaOfSphere

            Returns the area of a sphere

            Code: AreaOfSquare

            Returns the area of a square given the length of one side

            Code: AreaOfSquareDiag

            Returns the area of a square given the length of the diagonal

            Code: AreaOfTrapezoid

            Returns the area of a trapezoid

            Code: AreaOfTriangle

            Returns the area of a triangle

            Code: AreaOfTriangle2

            Returns the area of a triangle

            Code: LenOfRectangleDiagonal

            Returns the length of the diagonal of a rectangle

            Code: LenOfSquareDiagonal

            Returns the length of the diagonal of a square

            Code: VolOfCone

            Returns the volume of a cone

            Code: VolOfCylinder

            Returns the volume of a cylinder

            Code: VolOfPipe

            Returns the volume of a pipe

            Code: VolOfPyramid

            Returns the volume of a pyramid or cone

            Code: VolOfSphere

            Returns the volume of a sphere

            Code: VolOfTruncPyramid

            Returns the volume of a truncated pyramid

        MathGeneral

        This category contains general math routines, such as rounding, factorials, and determining the minimum and maximum values from a set of numbers.

            Code: ComputeWindChillEnglish

            Calculate the wind chill for exposed human skin

            Code: ComputeWindChillMetric

            Calculate the wind chill for exposed human skin

            Code: GetGCF

            Returns the greatest common factor (largest number that evenly divides into two numbers)

            Code: GetRandomInt

            Returns a random integer value between the range specified in the arguments, inclusive

            Code: IsNumberPrime

            Determines if a number is a prime number

            Code: MaxOfThree

            Returns the greatest of three values (null values are ignored)

            Code: MinOfThree

            Returns the smallest of three values (null values are ignored)

            Code: PrimeFactors

            This procedure calculates the prime factors of a number

            Code: ScalePercent

            Scales a value to a range between 0 and 100 (number could be less than 0 or greater than 100 if the 'current' value is less than 0 or greater than the 'max' value)

            Code: Subtract

            Subtract two numbers with decimals correctly

            Code: RoundDown (corrected)

            Rounds the passed number to specified number of decimal places with 0.5 rounded down

            Code: RoundUp (corrected)

            Rounds a number to a specified number of decimal places (0.5 is rounded up)

        MathStatistics

        Mathematical functions covering the areas of statistics and probability

            Code: CoefficientOfVar

            Returns the coefficient of variance

            Code: Factorial

            Returns the factorial of a given number

            Code: FactorialRecursive

            Returns the recursive factorial of a given number

            Code: GetArrayMean

            Returns the mean (average) of the elements in the supplied array

            Code: GetArrayMedian

            Returns the median of the elements in the supplied array

            Code: GetArrayMode

            Returns the mode (most common value) of the supplied array. If there is a tie, the smallest number is the mode.

            Code: GetNumberCombinations

            Returns the number of combinations of items that can be derived from a population (order does not matter)

            Code: GetNumberPermutations

            Returns the number of combinations of Items that can occur from Pool (order matters)

            Code: StdDev

            Returns the standard deviation of the array

            Code: StdError

            Returns the standard error

            Code: SumElements

            Returns the sum of array elements

            Code: SumOfSquaredElements

            Returns the sum of the square of array elements

            Code: VarianceOfArray

            Returns the variance of the array

        MathTrigonometry

        Code that covers derived math functions for trigonometry, including cosines, tangents and secants.

            Code: ArcCoSecant

            Returns the inverse cosecant of the supplied number

            Code: ArcCotangent

            Returns the inverse cotangent of the supplied number

            Code: ArcSecant

            Returns the inverse secant of the supplied number

            Code: CoSecant

            Returns the CoSecant of the supplied number. Note that sin(num) cannot equal zero. This can happen if num is a multiple of cdblPI.

            Code: CoTangent

            Returns the Cotangent of the supplied number. Function is undefined if input value is a multiple of PI.

            Code: HyperbolicArcCosecant

            Returns the Inverse Hyperbolic Cosecant of the supplied number

            Code: HyperbolicArcCosine

            Returns the Inverse Hyperbolic Cosine of the supplied number.

            Code: HyperbolicArcCotangent

            Returns the Inverse Hyperbolic Tangent of the supplied number. Undefined if num is 1.

            Code: HyperbolicArcSecant

            Returns the Inverse Hyperbolic Secant of the supplied number

            Code: HyperbolicArcSine

            Returns the Inverse Hyperbolic Sine of the supplied number

            Code: HyperbolicArctan

            Returns the Inverse Hyperbolic Tangent of the supplied number. The return value is undefined if input value is 1.

            Code: HyperbolicCosecant

            Returns the Hyperbolic Cosecant of the supplied number.

            Code: HyperbolicCotangent

            Returns the Hyperbolic CoTangent of the supplied number

            Code: HyperbolicSecant

            Returns the Hyperbolic Secant of the supplied number.

            Code: Secant

            Returns the secant of the supplied number

        Unit Conversions

        Functions for performing unit conversions

            Class: Unit Conversions

            Functions for performing unit conversions

        Item: BMI Calculator

        Code and example for calculating BMI (Body Mass Index)

    Diagnostics

    Shows examples of using the System.Diagnostics namespace

        EventLogs

            Code: ClearLogEntries

            Clears all log entries from the specified log

            Code: DeleteLog

            Deletes the specified log

            Code: NewEventLog

            Creates a new log and an entry, and optionally clears or deletes it

            Code: WriteLogEntry

            Writes an entry to an existing log

        Processes

        Provides access to local and remote processes and enables you to start and stop local system processes

            Code: GetBasePriorities

            Returns a hash table containing the name and base priority for each process currently running

            Code: GetProcessInfo

            Returns a hash table containing information about the current process

            Code: StartProcess

            Starts the specified process

            Code: StartProcessWithParameters

            Starts the specified process with parameters

        Web EventLog (I)

        Web application to show view EventLog

            Class: Code behind for EventLogConsole.aspx

            Class: EventEntry

            WebForm: EventLogConsole.aspx

            XML: Web.Config

        Web EventLog (II)

        Web application to show view EventLog

            Class: Code behind for Default.aspx

            WebForm: Default.aspx

            Class: EventLogHelper

            XML: Web.Config

        Web Performance Monitor

        Web application to show current performance counters' reading

            Class: Code behind for PerfMonConsole.aspx

            Class: Global.asax

            Class: PerfCounter

            WebForm: PerfMonConsole.aspx

            XML: Web.Config

    Registry

    Code for reading from and writing to the registry

        Code: CreateKeyAndSubKey

        Creates a new key and subkey under the specified HKEY node

        Code: DeleteKeyValue

        Deletes a value from the specified subkey

        Code: DeleteSubKey

        Deletes a subkey and all of its subkeys

        Code: DeleteSubKeyWithNoSubItems

        Deletes a subkey only if it has no subkeys

        Code: GetKeyValues

        Returns a hashtable containing all value names and values for the specified subkey

        Code: GetSubkeyCount

        Returns a count of subkeys for the specified key

        Code: GetSubKeyNames

        Returns an array of the subkeys in the specified key

        Code: GetValueCount

        Returns a count of values in a subkey

        Code: SetKeyValue

        Sets the default value for the specified subkey

    Strings

        Code: ArrayToString

        Converts the passed array to a delimited string

        Module: CharacterType

        Illustrates how to determine what type of character is in the specified location

        Code: CleanAmpersand

        Doubles every ampersand character in the input string to replace the hot key with an ampersand character

        Code: CleanQuotes

        Coverts double-quote (") characters in a string to apostrophes (')

        Code: ContainsAlpha

        Determines if there are alpha characters other than "-" in the supplied string

        Code: CountDelimitedWords

        Returns the number of words in a delimited string

        Code: CountOccurrences

        Returns the number of times a string appears in a string

        Code: CountWords

        Returns the number of words separated by spaces

        Code: EncloseString

        Wraps the string in the specified characters

        Code: FillString

        Generates a string of repeated characters

        Code: GenRandomPassword

        Generates a random string suitable for a password

        Code: GetDelimitedWord

        Returns a word from a delimited string

        Code: InsertString

        Inserts one string into another at the specified location.

        Code: LowerCase

        Converts the passed string to lower case

        Code: NumberSuffix

        Converts an integer into a string with a trailing suffix

        Code: PadLeftString

        Left-pads a string to intStrLength characters for right justification

        Code: PadRightString

        PadRightString

        Code: ProperCase

        Converts the passed string to proper case

        Code: StringToArrayOfWords

        Converts a delimited string to an array of words

        Code: UpperCase

        Converts the passed string to upper case

        Code: ValidateUSZip

        Formats the supplied US zip code

        Code: EncodeAsBase64

        Encodes the input string as Base64 and returns it as a byte array

        Code: DecodeFromBase64

        Decodes the passed base64 byte array back into a string

        Code: TextToHTML

        Encode text in an HTML safe manner by delimiting special characters.

        Snippet: A String as an Array of Characters

        Code: Concat

        Snippet: Copy a String

        Snippet: Copy Part of a String

        Code: FindCharacterInString

        Code: FindCharactersInString

        Code: GenGUID

        Code: InsertString

        Snippet: Match the End of a String

        Snippet: Match the Start of a String

        Code: Remove

        Snippet: Remove and Replace a String

        Code: Replace

        Snippet: String Formatting Examples

        Snippet: Substring Example

        Snippet: Test Equality of Two Strings

        Code: GenRandomPassword

        Generates a random string suitable for a password

        Article: String Addition in .NET

        This article discusses when and how to use the StringBuilder class, and when it's not worth the trouble.

    Date and Time

        modDateTime