GlobalProxySelection.Select 屬性

定義

命名空間:

System.Net

組件:

System.Net.Requests.dll

來源:

GlobalProxySelection.cs

取得或設定全域 HTTP Proxy。

public:
 static property System::Net::IWebProxy ^ Select { System::Net::IWebProxy ^ get(); void set(System::Net::IWebProxy ^ value); };

public static System.Net.IWebProxy Select { get; set; }

static member Select : System.Net.IWebProxy with get, set

Public Shared Property Select As IWebProxy

屬性值

IWebProxy

IWebProxy，每次對 GetResponse() 的呼叫所使用。

例外狀況

ArgumentNullException

指定給設定作業的值是 null。

SecurityException

此呼叫者沒有要求的作業權限。

範例

下列程式代碼範例會將 Select 屬性設定為空的 Proxy。

#using <System.dll>

using namespace System;
using namespace System::Net;
using namespace System::IO;
int main()
{
   
   // Create a request for the Web page at www.contoso.com.
   WebRequest^ request = WebRequest::Create( L"http://www.contoso.com" );
   
   // This application doesn't want they proxy to be used so it sets
   // the global proxy to an empy proxy.
   IWebProxy^ myProxy = GlobalProxySelection::GetEmptyWebProxy();
   
   // Get the response.
   WebResponse^ response = request->GetResponse();
   
   // Display the response to the console.
   Stream^ stream = response->GetResponseStream();
   StreamReader^ reader = gcnew StreamReader( stream );
   Console::WriteLine( reader->ReadToEnd() );
   
   // Clean up.
   reader->Close();
   stream->Close();
   response->Close();
   return 0;
}

using System;
using System.Net;
using System.IO;
namespace Examples.Http
{
    public class TestGlobalProxySelection
    {
        public static void Main()
        {
            // Create a request for the Web page at www.contoso.com.
            WebRequest request = WebRequest.Create("http://www.contoso.com");
            // This application doesn't want the proxy to be used so it sets
            // the global proxy to an empty proxy.
            IWebProxy myProxy = GlobalProxySelection.GetEmptyWebProxy();
            GlobalProxySelection.Select = myProxy;
            // Get the response.
            WebResponse response = request.GetResponse();
            // Display the response to the console.
            Stream stream = response.GetResponseStream();
            StreamReader reader = new StreamReader(stream);
            Console.WriteLine(reader.ReadToEnd());
            // Clean up.
            reader.Close();
            stream.Close();
            response.Close();
        }
    }
}

備註

如果要求支援 Proxy，而且未使用 屬性明確設定 Proxy，則屬性 Select 會設定所有 WebRequest 實例所使用的 Proxy Proxy。 和 HttpWebRequest目前支援 FtpWebRequest Proxy。