下面的代码需要如何修改才能发送WebRequest通过指定的proxy server and port number?
Dim Request As HttpWebRequest = WebRequest.Create(url)
Request.Method = "POST"
Request.ContentType = "application/x-www-form-urlencoded"
Using writer As StreamWriter = New StreamWriter(Request.GetRequestStream())
writer.Write(params)
End Using
使用 MSDN 中的代码：
Dim myProxy As New WebProxy()
myProxy.Address = New Uri("proxyAddress")
myProxy.Credentials = New NetworkCredential("username", "password")
myWebRequest.Proxy = myProxy
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