GlobalProxySelection.Select 屬性
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
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); };C#
public static System.Net.IWebProxy Select { get; set; }static member Select : System.Net.IWebProxy with get, setPublic Shared Property Select As IWebProxyIWebProxy，每次對 GetResponse() 的呼叫所使用。
指定給設定作業的值是 null。
此呼叫者沒有要求的作業權限。
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;
}
C#
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();
}
}
}
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。
| 產品 | 版本 |
|---|---|
| .NET | Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10 |
| .NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
| .NET Standard | 2.0, 2.1 |
