.NET Compact Framework中带有POST参数的异步WebRequest

WebRequest request = WebRequest.Create("http://example.com/api");
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";

string postData = "key1=value1&key2=value2";

byte[] byteArray = Encoding.UTF8.GetBytes(postData);

Stream dataStream = request.GetRequestStream();
dataStream.Write(byteArray, 0, byteArray.Length);
dataStream.Close();

request.BeginGetResponse(new AsyncCallback(ResponseCallback), request);

private static void ResponseCallback(IAsyncResult result)
{
    WebRequest request = (WebRequest)result.AsyncState;
    WebResponse response = request.EndGetResponse(result);
    using (Stream responseStream = response.GetResponseStream())
    {
        using (StreamReader reader = new StreamReader(responseStream))
        {
            string responseData = reader.ReadToEnd();
            // 处理响应数据
        }
    }
    response.Close();
}