Question

我试图发布到WCF服务。我收到这个错误＆＃34;在调用[Begin] GetResponse之前，必须将ContentLength字节写入请求流。＆＃34;

代码：

ASCIIEncoding encoding = new ASCIIEncoding();

string postData = "patron=WTM";
byte[] data = encoding.GetBytes(postData);

var httpWebRequest = (HttpWebRequest)WebRequest.Create("http://localhost:8733/FileShareWebServices/UploadFile");
httpWebRequest.ContentType = "application/json; charset=utf-8";
httpWebRequest.Method = "POST";
httpWebRequest.ContentLength = data.Length;
httpWebRequest.GetRequestStream();

var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
using (var streamReader = new  StreamReader(httpResponse.GetResponseStream()))
{
    var result = streamReader.ReadToEnd();
}

Answer 1

您发布的代码不会向请求流写入任何内容，这很可能是导致错误的原因。获得请求流后，您应该将内容和长度写入其中，如下所示：

using (Stream requestStream = httpWebRequest.GetRequestStream)
{
    requestStream.Write(data, 0, data.Length);
}

完整的代码如下所示：

ASCIIEncoding encoding = new ASCIIEncoding();

string postData = "patron=WTM";
byte[] data = encoding.GetBytes(postData);

var httpWebRequest = (HttpWebRequest)WebRequest.Create("http://localhost:8733/FileShareWebServices/UploadFile");
httpWebRequest.ContentType = "application/json; charset=utf-8";
httpWebRequest.Method = "POST";
httpWebRequest.ContentLength = data.Length;
//httpWebRequest.GetRequestStream();
// Code to write data to the stream
using (Stream requestStream = httpWebRequest.GetRequestStream)
{
    requestStream.Write(data, 0, data.Length);
}

var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
using (var streamReader = new  StreamReader(httpResponse.GetResponseStream()))
{
    var result = streamReader.ReadToEnd();
}

REST POST到WCF服务

1 个答案: