WebPermissionAttribute.AcceptPattern 屬性

定義

命名空間:

System.Net

組件:

System.Security.Permissions.dll

取得或設定目前 WebPermissionAttribute 可接受的 URI 其規則運算式模式描述。

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

public string AcceptPattern { get; set; }

member this.AcceptPattern : string with get, set

Public Property AcceptPattern As String

屬性值

String

字串，包含目前 WebPermissionAttribute 可接受的 URI 其規則運算式模式描述。 依據 Regex 建構函式字串的編碼規則，必須逸出這個字串。

例外狀況

ArgumentException

當您嘗試設定此值時，AcceptPattern 不是 null。 如果您想指定一個以上的可接受 URI，請使用額外的屬性宣告陳述式。

範例

下列範例示範如何使用 WebPermissionAttribute 來指定允許 AcceptPattern的 。

public:
   [method:WebPermission(SecurityAction::Deny,AcceptPattern="http://www\\.contoso\\.com/Private/.*")]
   static void CheckAcceptPermission( String^ uriToCheck )
   {
      WebPermission^ permissionToCheck = gcnew WebPermission;
      permissionToCheck->AddPermission( NetworkAccess::Accept, uriToCheck );
      permissionToCheck->Demand();
   }

   static void demoDenySite()
   {
      // Passes a security check.
      CheckAcceptPermission( "http://www.contoso.com/Public/page.htm" );
      Console::WriteLine( "Public page has passed Accept permission check" );

      try
      {
         // Throws a SecurityException.
         CheckAcceptPermission( "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 );
      }
   }

[WebPermission(SecurityAction.Deny, AcceptPattern=@"http://www\.contoso\.com/Private/.*")]

public static void CheckAcceptPermission(string uriToCheck) {

    WebPermission permissionToCheck = new WebPermission();
    permissionToCheck.AddPermission(NetworkAccess.Accept, uriToCheck);
    permissionToCheck.Demand();
}

public static void demoDenySite() {
    //Passes a security check.
    CheckAcceptPermission("http://www.contoso.com/Public/page.htm");
    Console.WriteLine("Public page has passed Accept permission check");

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

<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)
     con.Assert()
     Dim permissionToCheck As New WebPermission()
     permissionToCheck.AddPermission(NetworkAccess.Accept, uriToCheck)
     permissionToCheck.Demand()
  End Sub
  
  
  Public Shared Sub demoDenySite()
     'Passes a security check.
     CheckAcceptPermission("http://www.contoso.com/Public/page.htm")
     Console.WriteLine("Public page has passed Accept permission check")
     
     Try
        'Throws a SecurityException.
        CheckAcceptPermission("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

備註

套 WebPermissionAttribute 用至類別時，這個屬性會指定將接受哪些正則表達式字串，以在類別中使用。 這個屬性是寫入一次。

另請參閱

• 規則運算式語言 - 快速參考