c＃http在web响应中没有得到任何东西

Question

这是我的代码Request and Response。

System.IO.MemoryStream xmlStream = null; 
HttpWebRequest HttpReq = (HttpWebRequest)WebRequest.Create(url); 
xmlStream = new System.IO.MemoryStream(System.Text.Encoding.UTF8.GetBytes(format)); 

byte[] buf2 = xmlStream.ToArray(); 
System.Text.UTF8Encoding UTF8Enc = new System.Text.UTF8Encoding(); 
string s = UTF8Enc.GetString(buf2); 
string sPost = "XMLData=" + System.Web.HttpUtility.UrlDecode(s); 
byte[] bPostData = UTF8Enc.GetBytes(sPost); 
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); 
request.ContentType = "application/x-www-form-urlencoded"; 
HttpReq.Timeout = 30000; 
request.Method = "POST"; 
request.KeepAlive = true; 
using (Stream requestStream = request.GetRequestStream()) 
{ 
    requestStream.Write(bPostData, 0, bPostData.Length); 
    requestStream.Close(); 
} 

string responseString = ""; 
HttpWebResponse response = (HttpWebResponse)request.GetResponse(); 
using (StreamReader sr = new StreamReader(response.GetResponseStream())) 
{ 
    responseString = sr.ReadToEnd(); 
} 

此代码没有任何部分崩溃。 “格式”字符串是其中包含XML的字符串。最后，当您尝试查看responseString中的内容时，它是一个空字符串。我应该看到从URL发回给我的XML。这段代码中是否有缺失？

Answer 1

我会推荐的这混乱的代码的简化：

using (var client = new WebClient()) 
{ 
    var values = new NameValueCollection 
    { 
     { "XMLData", format } 
    }; 
    byte[] resultBuffer = client.UploadValues(url, values); 
    string result = Encoding.UTF8.GetString(resultBuffer); 
} 

，如果你想在XML直接在POST身体上传你不应该使用application/x-www-form-urlencoded内容类型。您可能应该指定正确的内容类型，如下所示：

using (var client = new WebClient()) 
{ 
    client.Headers[HttpRequestHeader.ContentType] = "text/xml"; 
    var data = Encoding.UTF8.GetBytes(format); 
    byte[] resultBuffer = client.UploadData(url, data); 
    string result = Encoding.UTF8.GetString(resultBuffer); 
}