WebProxy.GetProxy(Uri) 方法

定义

命名空间:

System.Net

程序集:

System.Net.WebProxy.dll

程序集:

System.dll

程序集:

netstandard.dll

返回请求的已代理 URI。

public:
 virtual Uri ^ GetProxy(Uri ^ destination);

public Uri? GetProxy (Uri destination);

public Uri GetProxy (Uri destination);

abstract member GetProxy : Uri -> Uri
override this.GetProxy : Uri -> Uri

Public Function GetProxy (destination As Uri) As Uri

参数

destination

Uri

所请求 Internet 资源的 Uri 实例。

返回

Uri

如果资源在回避列表上，则为 Internet 资源的 Uri 实例；否则为代理的 Uri 实例。

实现

GetProxy(Uri)

例外

ArgumentNullException

destination 参数为 null。

示例

下面的代码示例创建一个 WebProxy 对象并调用此方法以获取为资源选择的代理。

// The following method creates a WebProxy object that uses Internet Explorer's  
// detected script if it is found in the registry; otherwise, it 
// tries to use Web proxy auto-discovery to set the proxy used for
// the request.
void CheckAutoGlobalProxyForRequest( Uri^ resource )
{
   WebProxy^ proxy = gcnew WebProxy;
   
   // Display the proxy's properties.
   DisplayProxyProperties( proxy );
   
   // See what proxy is used for the resource.
   Uri^ resourceProxy = proxy->GetProxy( resource );
   
   // Test to see whether a proxy was selected.
   if ( resourceProxy == resource )
   {
      Console::WriteLine( "No proxy for {0}", resource );
   }
   else
   {
      Console::WriteLine( "Proxy for {0} is {1}", resource, resourceProxy );
   }
}

// The following method creates a WebProxy object that uses Internet Explorer's
// detected script if it is found in the registry; otherwise, it
// tries to use Web proxy auto-discovery to set the proxy used for
// the request.

public static void CheckAutoGlobalProxyForRequest(Uri resource)
{
    WebProxy proxy = new WebProxy();

    // Display the proxy's properties.
    DisplayProxyProperties(proxy);

    // See what proxy is used for the resource.
    Uri resourceProxy = proxy.GetProxy(resource);

    // Test to see whether a proxy was selected.
    if (resourceProxy == resource)
    {
        Console.WriteLine("No proxy for {0}", resource);
    }
    else
    {
        Console.WriteLine("Proxy for {0} is {1}", resource.OriginalString,
            resourceProxy.ToString());
    }
}

注解

该方法 GetProxy 返回实例用于访问 Internet 资源的 URI WebRequest 。

GetProxydestination与使用IsBypassed该方法的内容BypassList进行比较。 如果IsBypassed返回true，GetProxy则返回且destinationWebRequest实例不使用代理服务器。

如果 destination 不存在 BypassList，则 WebRequest 实例使用代理服务器，并 Address 返回该属性。