当发布表单时设置正确的编码类型

我想使用HttpClient进行发布。这是我所尝试的：当发布表单时设置正确的编码类型

public static async void DoPost(string url, string user, string password) 
    { 

     List<KeyValuePair<string, string>> postValues = new List<KeyValuePair<string, string>>(); 
     postValues.Add(new KeyValuePair<string, string>("method", "login")); 
     postValues.Add(new KeyValuePair<string, string>("user", user)); 
     postValues.Add(new KeyValuePair<string, string>("pass", password)); 

     FormUrlEncodedContent formEnc = new FormUrlEncodedContent(postValues); 

     using (HttpClient client = new HttpClient()) 
     using (HttpResponseMessage response = await client.PostAsync(url, formEnc)) 
     using (HttpContent content = response.Content) 
     { 
      // ... Read the string. 
      string result = await content.ReadAsStringAsync(); 

      // ... Display the result. 
      if (result != null && 
      result.Length >= 50) 
      { 
       Console.WriteLine(result.Substring(0, 50) + "..."); 
      } 
     } 
    }

它引发了一个例外，因为没有正确的编码类型。我不确定编码类型应该是什么或者在哪里设置。这是例外：

System.InvalidOperationException was unhandled by user code 
    HResult=-2146233079 
    Message=The character set provided in ContentType is invalid. Cannot read content as string using an invalid character set. 
    Source=System.Net.Http 
    StackTrace: 
     at System.Net.Http.HttpContent.ReadBufferedContentAsString() 
     at System.Net.Http.HttpContent.<>c.<ReadAsStringAsync>b__36_0(HttpContent s) 
     at System.Net.Http.HttpContent.<WaitAndReturnAsync>d__62`2.MoveNext() 
    --- End of stack trace from previous location where exception was thrown --- 
     at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) 
     at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
     at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() 
     at SuiteCrmTest.Program.<DoPost>d__1.MoveNext() in D:\Projects\SuiteCrmTest\src\SuiteCrmTest\Program.cs:line 34 
    InnerException: 
     HResult=-2147024809 
     Message='"ISO-8859-1"' is not a supported encoding name. For information on defining a custom encoding, see the documentation for the Encoding.RegisterProvider method. 
Parameter name: name 
     ParamName=name 
     Source=System.Private.CoreLib 
     StackTrace: 
      at System.Globalization.EncodingTable.internalGetCodePageFromName(String name) 
      at System.Globalization.EncodingTable.GetCodePageFromName(String name) 
      at System.Text.Encoding.GetEncoding(String name) 
      at System.Net.Http.HttpContent.ReadBufferedContentAsString() 
     InnerException:

如何设置正确的内容类型？

编辑：

接收的头：

HTTP/1.1 200 OK 
Server: nginx/1.4.6 (Ubuntu) 
Date: Sun, 07 Aug 2016 23:46:17 GMT 
Content-Type: text/html; charset=UTF-8 
Transfer-Encoding: chunked 
Connection: keep-alive 
X-Powered-By: PHP/5.5.9-1ubuntu4.17 
Expires: Thu, 19 Nov 1981 08:52:00 GMT 
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0 
Pragma: no-cache 
Content-Encoding: gzip 



HTTP/1.1 500 Internal Server Error 
Server: nginx/1.4.6 (Ubuntu) 
Date: Sun, 07 Aug 2016 23:46:26 GMT 
Content-Type: text/html; charset="ISO-8859-1" 
Transfer-Encoding: chunked 
Connection: keep-alive 
X-Powered-By: PHP/5.5.9-1ubuntu4.17

第一头被什么引起我觉得问题。我认为第二个标题是重定向到一个html消息。在第一个标题有ISO-8859-1编码的消息，我猜是它抛出错误的原因，但我不知道如何阅读。如何设置字符集？

来源

2016-08-07 Guerrilla

将'public static async void'改为'public static async Task'并查看错误是否停止。你应该避免使用'async void' – Nkosi

@Nkosi这不会改变异常。它仍然不喜欢编码类型 – Guerrilla

扫描发送的请求并确认“ContentType”标题。基于错误消息'“ISO-8859-1”'不是受支持的编码名称，你似乎正在使用不受支持的编码 – Nkosi

我正在访问的API允许一个字段指定返回类型。我在表单字段中指定了Json，然后运行。

来源

2016-08-08 00:21:16 Guerrilla

当发布表单时设置正确的编码类型

回答

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