使用C＃HttpWebRequest的，以JSON发送到Web服务 [英] Use C# HttpWebRequest to send json to web service

问题描述

我是新来的JSON和需要帮助。我有一些JSON jQuery的工作和我已在网页上运行的Web服务得到正确的信息回来。但是，我无法得到它在C＃中使用HttpWebRequest的工作。我将张贴下面的代码

  ///<总结> 
 ///概要描述VBRService 
 ///< /总结> 
 [WebService的空间（namespace =http://test.visitblueridge.com/）] 
 [WebServiceBinding（ConformsTo = WsiProfiles.BasicProfile1_1）] 
 [System.ComponentModel.ToolboxItem（假） ] 
 //要允许此Web服务从脚本调用，使用ASP.NET AJAX，取消注释以下行。 
 [System.Web.Script.Services.ScriptService] 
公共类VBRService：System.Web.Services.WebService 
 {
 [的WebMethod] 
公共字符串的HelloWorld（ ）
 {
返回的Hello World; 
} 
 
 [的WebMethod] 
 [ScriptMethod（ResponseFormat = ResponseFormat.Json）] 
公共字符串callJson（字符串x）
 {
返回曾为=+ X; 
} 
} 
  

这是对Web服务，我想成为能够称之为callJson（字符串x）使用此代码，

  VAR的HttpWebRequest =（HttpWebRequest的）WebRequest.Create（webAddr） ; 
 httpWebRequest.ContentType =文/ JSON; 
 httpWebRequest.Method =POST; 
 
使用（VAR的StreamWriter =新的StreamWriter（httpWebRequest.GetRequestStream（）））
 {
 JSON字符串={\x\：\true\\ \\}; 
 
 streamWriter.Write（JSON）; 
 streamWriter.Flush（）; 
} 
 
 VAR的HttpResponse =（HttpWebResponse）httpWebRequest.GetResponse（）; 
使用（VAR的StreamReader =新的StreamReader（httpResponse.GetResponseStream（）））
 {
 VAR的结果= streamReader.ReadToEnd（）; 
返回结果; 
} 
  

我不断收到内部服务器错误。当我更改类型应用程序/ JSON和添加，

  request.Headers.Add（SOAPAction报，HTTP：/ /test.visitblueridge.com/callJson）; 
  

我得到一个不被接受媒体错误。

谢谢你在前进，并希望这可以帮助别人。

解决方案

首先，你错过了ScriptService属性在web服务添加所有的。

[ScriptService]

在此之后尝试以下方法通过JSON调用Web服务

  VAR webAddr =HTTP：//域名/ VBRService。 ASMX / callJson 
 VAR的HttpWebRequest =（HttpWebRequest的）WebRequest.Create（webAddr）; 
 httpWebRequest.ContentType =应用/ JSON的;字符集= UTF-8; 
 httpWebRequest.Method =POST; 
 
使用（VAR的StreamWriter =新的StreamWriter（httpWebRequest.GetRequestStream（）））
 {
 JSON字符串={\x\：\true\\ \\}; 
 
 streamWriter.Write（JSON）; 
 streamWriter.Flush（）; 
} 
 
 VAR的HttpResponse =（HttpWebResponse）httpWebRequest.GetResponse（）; 
使用（VAR的StreamReader =新的StreamReader（httpResponse.GetResponseStream（）））
 {
 VAR的结果= streamReader.ReadToEnd（）; 
返回结果; 
} 
  

I am new to JSON and need help. I have some JSON working in jquery and get the information back correctly from the web service I have running on the web. However, I can't get it to work using HttpWebRequest in C#. I will post the code below.

/// <summary>
/// Summary description for VBRService
/// </summary>
[WebService(Namespace = "http://test.visitblueridge.com/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.ComponentModel.ToolboxItem(false)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. 
[System.Web.Script.Services.ScriptService]
public class VBRService : System.Web.Services.WebService
{
    [WebMethod]
    public string HelloWorld()
    {
        return "Hello World";
    }

    [WebMethod]
    [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
    public string callJson(string x)
    {
        return "Worked =" + x;
    }
}

That is on the web service and I want to be able to call "callJson(string x)" using this code,

var httpWebRequest = (HttpWebRequest)WebRequest.Create(webAddr);
        httpWebRequest.ContentType = "text/json";
        httpWebRequest.Method = "POST";

        using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
        {
            string json = "{\"x\":\"true\"}";

            streamWriter.Write(json);
            streamWriter.Flush();
        }

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

I keep getting an internal server error. When I change the type to application/json and add,

request.Headers.Add("SOAPAction", "http://test.visitblueridge.com/callJson");

I get an unaccepted media error.

Thank you in advance and hope this helps others.

解决方案

First of all you missed ScriptService attribute to add in webservice.

[ScriptService]

After then try following method to call webservice via JSON.

        var webAddr = "http://Domain/VBRService.asmx/callJson";
        var httpWebRequest = (HttpWebRequest)WebRequest.Create(webAddr);
        httpWebRequest.ContentType = "application/json; charset=utf-8";
        httpWebRequest.Method = "POST";            

        using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
        {
            string json = "{\"x\":\"true\"}";

            streamWriter.Write(json);
            streamWriter.Flush();
        }

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

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