WebPermissionAttribute.ConnectPattern 属性

定义

命名空间:

System.Net

程序集:

System.Security.Permissions.dll

包:

System.Security.Permissions v9.0.0-rc.2.24473.5

Source:

WebPermissionAttribute.cs

获取或设置描述当前 WebPermissionAttribute 控制的 URI 连接的正则表达式模式。

public:
 property System::String ^ ConnectPattern { System::String ^ get(); void set(System::String ^ value); };

public string ConnectPattern { get; set; }

member this.ConnectPattern : string with get, set

Public Property ConnectPattern As String

属性值

String

一个字符串，包含描述该 WebPermissionAttribute 控制的 URI 连接的正则表达式模式。

例外

ArgumentException

当尝试设置该值时，ConnectPattern 不为 null。 如果希望指定多个 Connect URI，请使用附加的特性声明语句。

示例

以下示例演示如何使用 WebPermissionAttribute 指定允许的 ConnectPattern。

public:
   // Set the WebPermissionAttribute ConnectPattern property.
   [WebPermission(SecurityAction::Deny,ConnectPattern="http://www\\.contoso\\.com/Private/.*")]

   static void CheckConnectPermission( String^ uriToCheck )
   {
      WebPermission^ permissionToCheck = gcnew WebPermission;
      permissionToCheck->AddPermission( NetworkAccess::Connect, uriToCheck );
      permissionToCheck->Demand();
   }

   static void demoDenySite()
   {
      //Pass the security check.
      CheckConnectPermission( "http://www.contoso.com/Public/page.htm" );
      Console::WriteLine( "Public page has passed Connect permission check" );

      try
      {
         //Throw a SecurityException.
         CheckConnectPermission( "http://www.contoso.com/Private/page.htm" );
         Console::WriteLine( "This line will not be printed" );
      }
      catch ( SecurityException^ e ) 
      {
         Console::WriteLine( "Expected exception {0}", e->Message );
      }
   }
};

  
  // Set the WebPermissionAttribute  ConnectPattern property.
  [WebPermission(SecurityAction.Deny, ConnectPattern=@"http://www\.contoso\.com/Private/.*")]

public static void CheckConnectPermission(string uriToCheck) 
{
    WebPermission permissionToCheck = new WebPermission();
    permissionToCheck.AddPermission(NetworkAccess.Connect, uriToCheck);
    permissionToCheck.Demand();
}

public static void demoDenySite() {
    //Pass the security check.
    CheckConnectPermission("http://www.contoso.com/Public/page.htm");
    Console.WriteLine("Public page has passed Connect permission check");

    try 
    {
        //Throw a SecurityException.
        CheckConnectPermission("http://www.contoso.com/Private/page.htm");
        Console.WriteLine("This line will not be printed");
    }
    catch (SecurityException e) 
    {
        Console.WriteLine("Expected exception" + e.Message);
    }
 }

  ' Set the WebPermissionAttribute  ConnectPattern property.
<WebPermission(SecurityAction.Deny, ConnectPattern := "http://www\.contoso\.com/Private/.*")> _
    Public Shared Sub CheckConnectPermission(uriToCheck As String)
     Dim re As New Regex("http://www\.contoso\.com/Public/.*")
     Dim con As New WebPermission(NetworkAccess.Connect, re)
     con.Assert()
     Dim permissionToCheck As New WebPermission()
     permissionToCheck.AddPermission(NetworkAccess.Connect, uriToCheck)
     permissionToCheck.Demand()
  End Sub
  
  
  Public Shared Sub demoDenySite()
     'Pass the security check.
     CheckConnectPermission("http://www.contoso.com/Public/page.htm")
     Console.WriteLine("Public page has passed Connect permission check")
     
     Try
        'Throw a SecurityException.
        CheckConnectPermission("http://www.contoso.com/Private/page.htm")
        Console.WriteLine("This line will not be printed")
     Catch e As SecurityException
        Console.WriteLine(("Expected exception" + e.Message))
     End Try
  End Sub

注解

应用于 WebPermissionAttribute 类时，此属性指定接受在类中使用的正则表达式连接字符串。 此属性为写入一次。

另请参阅

• 正则表达式语言 - 快速参考