我正在尝试将帖子数据(json)发送到网络服务器。这是非常基本的事情,但在Windows 8 api中,一切都必须复杂:/ Microsoft提供的示例并非全部工作http://code.msdn.microsoft.com/windowsapps/HttpClient-sample-55700664/sourcecode?fileId=50955&pathId=797575364 scenerio 5 - 它正在向服务器发送内容但没有应该发送的内容(也许当我发送时)将字符串转换为流有一些问题......)
byte[] byteArray = Encoding.Unicode.GetBytes( data );
MemoryStream stream = new MemoryStream( byteArray );
StreamContent streamContent = new StreamContent(stream);
HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post, url);
request.Content = streamContent;
request.Headers.TransferEncodingChunked = true;
var httpClient = new HttpClient();
HttpResponseMessage response = await httpClient.SendAsync(request);
string responseString = await response.Content.ReadAsStringAsync();
但我提出了另一个想法,这个解决方案有效(但......)
var request = (HttpWebRequest)WebRequest.Create(url);
request.ContentType = "application/json";
request.Method = "POST";
using (var requestStream = await request.GetRequestStreamAsync())
{
var writer = new StreamWriter(requestStream);
writer.Write(data);
writer.Flush();
}
using (var response = await request.GetResponseAsync())
{
using (var responseStream = response.GetResponseStream())
{
var reader = new StreamReader(responseStream);
var answer = reader.ReadToEnd();
return answer;
}
}
正如我之前所说,这个解决方案有很大的缺点 - 服务器响应可能有http代码422,然后应用程序立即崩溃。如何使用第二个解决方案检查http响应代码? (我不确定这是否可行,因为它在request.GetResponseAsync
)
提前致谢:)
答案 0 :(得分:0)
使用try-catch块包裹代码的主体,并在错误的调用中处理WebException
。 WebException.Status
包含请求失败原因的状态代码。
var request = (HttpWebRequest)WebRequest.Create(url);
request.ContentType = "application/json";
request.Method = "POST";
try {
// Your code
}
catch (WebException)
{ //error handling
}