WebException.Status 属性

获取响应的状态。

**命名空间:**System.Net
**程序集:**System（在 system.dll 中）

语法

声明
Public ReadOnly Property Status As WebExceptionStatus
用法
Dim instance As WebException
Dim value As WebExceptionStatus

value = instance.Status

public WebExceptionStatus Status { get; }

public:
property WebExceptionStatus Status {
    WebExceptionStatus get ();
}

/** @property */
public WebExceptionStatus get_Status ()

public function get Status () : WebExceptionStatus

属性值

WebExceptionStatus 值之一。

备注

Status 属性指示 WebException 的原因。

Status 的值为 WebExceptionStatus 值之一。

示例

下面的示例检查 Status 属性，并将 StatusCode 和基础 HttpWebResponse 实例的 StatusDescription 输出到控制台。

 Try
     'Create a web request for an invalid site. Substitute the "invalid site" strong in the Create call with a invalid name.
     Dim myHttpWebRequest As HttpWebRequest = CType(WebRequest.Create("invalid site"), HttpWebRequest)
     
     'Get the associated response for the above request.
     Dim myHttpWebResponse As HttpWebResponse = CType(myHttpWebRequest.GetResponse(), HttpWebResponse)
     myHttpWebResponse.Close()
 Catch e As WebException
     Console.WriteLine(e.Message)
     
      If e.Status = WebExceptionStatus.ProtocolError Then
         Console.WriteLine("Status Code : {0}", CType(e.Response, HttpWebResponse).StatusCode)
         Console.WriteLine("Status Description : {0}", CType(e.Response, HttpWebResponse).StatusDescription)
     End If

Catch e As Exception
     Console.WriteLine(e.Message)
 End Try

try {
   // Create a web request for an invalid site. Substitute the "invalid site" strong in the Create call with a invalid name.
     HttpWebRequest myHttpWebRequest = (HttpWebRequest) WebRequest.Create("invalid site");

    // Get the associated response for the above request.
     HttpWebResponse myHttpWebResponse = (HttpWebResponse) myHttpWebRequest.GetResponse();
    myHttpWebResponse.Close();
}
catch(WebException e) {
    Console.WriteLine("This program is expected to throw WebException on successful run."+
                        "\n\nException Message :" + e.Message);
    if(e.Status == WebExceptionStatus.ProtocolError) {
        Console.WriteLine("Status Code : {0}", ((HttpWebResponse)e.Response).StatusCode);
        Console.WriteLine("Status Description : {0}", ((HttpWebResponse)e.Response).StatusDescription);
    }
}
catch(Exception e) {
    Console.WriteLine(e.Message);
}

try
{
   // Create a web request for an unknown server (this raises the WebException).
   HttpWebRequest^ myHttpWebRequest = (HttpWebRequest^)(WebRequest::Create( "http://unknown.unknown.com" ));
   
   // Get the associated response for the above request.
   HttpWebResponse^ myHttpWebResponse = (HttpWebResponse^)(myHttpWebRequest->GetResponse());
   myHttpWebResponse->Close();
}
catch ( WebException^ e ) 
{
   Console::WriteLine( "This program is expected to throw WebException on successful run." +
      "\n\nException Message : " + e->Message );
   if ( e->Status == WebExceptionStatus::ProtocolError )
   {
      Console::WriteLine( "Status Code: {0}", ( (HttpWebResponse^)(e->Response) )->StatusCode );
      Console::WriteLine( "Status Description: {0}", ( (HttpWebResponse^)(e->Response) )->StatusDescription );
   }
}
catch ( Exception^ e ) 
{
   Console::WriteLine( e->Message );
}

try {
    // Create a web request for an invalid site. Substitute the
    // "invalid site" strong in the Create call with a invalid name.
    HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.
        Create("invalid site");
    // Get the associated response for the above request.
    HttpWebResponse myHttpWebResponse =
        ( HttpWebResponse)myHttpWebRequest.GetResponse();
    myHttpWebResponse.Close();
}
catch (WebException e) {
    Console.WriteLine("This program is expected to throw WebException"
        + " on successful run." + "\n\nException Message :" 
        + e.get_Message());
    if (e.get_Status().Equals(WebExceptionStatus.ProtocolError)) {
        Console.WriteLine("Status Code : {0}", ((HttpWebResponse)(e.
            get_Response())).get_StatusCode());
        Console.WriteLine("Status Description : {0}",((HttpWebResponse)(
            e.get_Response())).get_StatusDescription());
    }
}

平台

Windows 98、Windows 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

.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。

版本信息

.NET Framework

受以下版本支持：2.0、1.1、1.0

.NET Compact Framework

受以下版本支持：2.0、1.0

请参见

参考

WebException 类
WebException 成员
System.Net 命名空间
WebExceptionStatus