调用HTTPWebRequest时无效的URI

Question

我编写了一个控制台应用程序，该应用程序调用RESTful Web服务，该服务通过HTTP发送XML请求，并返回XML响应。 这是我当前正在使用的代码：

WebRequest wrq = WebRequest.Create("<?xml version=1.0 encoding=ISO-8859-1?>
<Request xmlns=https://sapiqa.overstock.com/api><MerchantKey>"+MerchantKey+"
</MerchantKey><AthenticationKey>"+AuthenticationKey+"</AuthenticationKey><"+APIMethod+"
/></Request>");
wrq.Method = "POST";
// Create POST data and convert it to a byte array. Strip out unnecessary text. 
byte[] byteArray = Encoding.UTF8.GetBytes(URL.Replace(APIMethod, ""));
// Set the ContentType property of the WebRequest. 
wrq.ContentType = "text/xml";
// Set the ContentLength property of the WebRequest. 
wrq.ContentLength = byteArray.Length;

Stream dataStream = wrq.GetRequestStream();
// Write the data to the request stream. 
dataStream.Write(byteArray, 0, byteArray.Length);
// Close the Stream object. 
dataStream.Close();
// Get the response. 
WebResponse response = wrq.GetResponse();
// Display the status. 
Console.WriteLine(((HttpWebResponse)response).StatusDescription);
// Get the stream containing content returned by the server. 
dataStream = response.GetResponseStream();
// Open the stream using a StreamReader for easy access. 
StreamReader reader = new StreamReader(dataStream);
// Read the content. 
string responseFromServer = reader.ReadToEnd();
// Display the content. 
GetOrders2Response = responseFromServer;
Console.WriteLine(responseFromServer);

// Clean up the streams. 
reader.Close();
dataStream.Close();
response.Close();
Console.ReadKey();

当我运行此代码时，我收到错误说明：

Invalid URI: The URI scheme is not valid.

如何通过WebRequest进行补救，以发送格式正确的XML并以XML格式接收响应？

Answer 1

正如错误和文档清楚指出的那样， WebRequest.Create采用URL，而不是POST负载。

您需要将URL传递给Create() ，并将XML有效负载写入请求流。