WebPermissionAttribute(SecurityAction) 构造函数

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

用指定可在此类上执行的安全操作的值初始化 WebPermissionAttribute 类的新实例。

public:
 WebPermissionAttribute(System::Security::Permissions::SecurityAction action);

public WebPermissionAttribute (System.Security.Permissions.SecurityAction action);

new System.Net.WebPermissionAttribute : System.Security.Permissions.SecurityAction -> System.Net.WebPermissionAttribute

Public Sub New (action As SecurityAction)

参数

action

SecurityAction

SecurityAction 值之一。

例外

ArgumentException

action 不是有效的 SecurityAction 值。

示例

以下示例演示如何应用于 WebPermissionAttribute 方法。

public:
   // Set the declarative security for the URI.
   [WebPermission(SecurityAction::Deny,Connect="http://www.contoso.com/")]
   void Connect()
   {
      // Throw an exception.
      try
      {
         HttpWebRequest^ myWebRequest = dynamic_cast<HttpWebRequest^>(WebRequest::Create( "http://www.contoso.com/" ));
      }
      catch ( Exception^ e ) 
      {
         Console::WriteLine( "Exception : {0}", e );
      }

public void Connect() 
{
  // Throw an exception.   
  try
  {
    HttpWebRequest myWebRequest = (HttpWebRequest)WebRequest.Create("http://www.contoso.com/");
  }
  catch(Exception e)
  {
    Console.WriteLine("Exception : " + e.ToString());
  }

  
  ' Set the declarative security for the URI.
  <WebPermission(SecurityAction.Deny, Connect := "http://www.contoso.com/")> _
  Public Sub Connect()
     ' Throw an exception.	 
     Try
        Dim myWebRequest As HttpWebRequest = CType(WebRequest.Create("http://www.contoso.com"), HttpWebRequest)
     Catch e As Exception
        Console.WriteLine(("Exception : " + e.ToString()))
     End Try
  End Sub

注解

SecurityAction传递给此构造函数的值指定可对此类执行的允许安全操作。