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WebPermission.AddPermission Method (NetworkAccess, Regex)

Adds the specified URI with the specified access rights to the current WebPermission.

Namespace:  System.Net
Assembly:  System (in System.dll)

Public Sub AddPermission ( _
	access As NetworkAccess, _
	uriRegex As Regex _
Dim instance As WebPermission 
Dim access As NetworkAccess 
Dim uriRegex As Regex

instance.AddPermission(access, uriRegex)


Type: System.Net.NetworkAccess

A NetworkAccess that specifies the access rights that are granted to the URI.

Type: System.Text.RegularExpressions.Regex

A regular expression that describes the set of URIs to which access rights are granted.


The uriRegex parameter is Nothing.

If you have specified None as the PermissionState, use AddPermission to allow the use of uriRegex in the target class. Specify Accept as the access parameter to add the URI specified by the uriRegex parameter to the list of URI accept strings, or specify Connect as the access parameter to add the URI to the list of URI connect strings.


Calling AddPermission on an Unrestricted WebPermission instance will have no effect as permission is granted to all URIs.


It is recommended that you create uriRegex using the RegexOptions.IgnoreCase, RegexOptions.Compiled, and RegexOptions.Singleline flags.


A candidate URI string is checked against the list of relevant regular expressions (AcceptList or ConnectList) in two ways. First, the candidate URI string is checked against the appropriate list; then, if there is no match, the candidate URI string is converted into a Uri and checked against the appropriate list.

The following example uses AddPermission to give access rights for the specified URI.

' Create a WebPermission. 
Dim myWebPermission1 As New WebPermission()

' Allow Connect access to the specified URLs.
myWebPermission1.AddPermission(NetworkAccess.Connect, New Regex("http://www\.contoso\.com/.*", RegexOptions.Compiled Or RegexOptions.IgnoreCase Or RegexOptions.Singleline))

// Create a WebPermission.
WebPermission* myWebPermission1 = new WebPermission();

// Allow Connect access to the specified URLs.
   new Regex(S"http://www\\.contoso\\.com/.*",
   static_cast<RegexOptions>(RegexOptions::Compiled | RegexOptions::IgnoreCase | RegexOptions::Singleline)));


Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0