WebPermissionAttribute.AcceptPattern Property

Gets or sets a regular expression pattern that describes the URI accepted by the current WebPermissionAttribute.

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

Public Property AcceptPattern As String
Dim instance As WebPermissionAttribute
Dim value As String

value = instance.AcceptPattern

instance.AcceptPattern = value
/** @property */
public String get_AcceptPattern ()

/** @property */
public void set_AcceptPattern (String value)

public function get AcceptPattern () : String

public function set AcceptPattern (value : String)

Not applicable.

Property Value

A string containing a regular expression pattern that describes the URI accepted by the current WebPermissionAttribute. This string must be escaped according to the rules for encoding a System.Text.RegularExpressions.Regex constructor string.

Exception typeCondition


AcceptPattern is not a null reference (Nothing in Visual Basic) when you attempt to set the value. If you wish to specify more than one Accept URI, use an additional attribute declaration statement.

When applying WebPermissionAttribute to your class, this property specifies what regular expression string will be accepted for use within your class. This property is write-once.

The following example demonstrates how to use WebPermissionAttribute to specify an allowable AcceptPattern.

<WebPermission(SecurityAction.Deny, AcceptPattern := "http://www\.contoso\.com/Private/.*")> _
  Public Shared Sub       CheckAcceptPermission(uriToCheck As String)
     Dim re As New Regex("http://www\.contoso\.com/Public/.*")
     Dim con As New WebPermission(NetworkAccess.Connect, re)
     Dim permissionToCheck As New WebPermission()
     permissionToCheck.AddPermission(NetworkAccess.Accept, uriToCheck)
  End Sub 'CheckAcceptPermission
  Public Shared Sub demoDenySite()
     'Passes a security check.
     Console.WriteLine("Public page has passed Accept permission check")
        'Throws a SecurityException.
        Console.WriteLine("This line will not be printed")
     Catch e As SecurityException
        Console.WriteLine(("Expected exception" + e.Message))
     End Try
  End Sub 'demoDenySite

/** @attribute WebPermission(SecurityAction.Deny, AcceptPattern =
public static void CheckAcceptPermission(String uriToCheck)
    WebPermission permissionToCheck = new WebPermission();
    permissionToCheck.AddPermission(NetworkAccess.Accept, uriToCheck);
} //CheckAcceptPermission

public static void DemoDenySite()
    //Passes a security check.
    Console.WriteLine("Public page has passed Accept permission check");

    try {
        //Throws a SecurityException.
        Console.WriteLine("This line will not be printed");
    catch (SecurityException e) {
        Console.WriteLine("Expected exception: " + e.get_Message());
} //DemoDenySite

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0