wpf 使用 GET 访问 WCF 休息服务时出现 400 http 错误请求错误

Getting 400 http bad request error while accessing WCF rest service using GET

提问by Siddhant

the Exact error is System.Net.WebException: The Remote server returned an Error: (400) Bad Request. at system.Net.HttpWebRequest.GetResponse()i have a WCF rest service hosted in IIS..I have created a simple WPF app with just a button..now i need to access the methods in my WCF service using get..

确切的错误是 System.Net.WebException：远程服务器返回错误：(400) 错误请求。在 system.Net.HttpWebRequest.GetResponse()我有一个托管在 IIS 中的 WCF 休息服务..我创建了一个简单的 WPF 应用程序，只有一个按钮..现在我需要使用 get..

This is the code For WPF

这是 WPF 的代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Net;
using System.Runtime.Serialization;
using System.Xml;
namespace RestFulDemo
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void RestDemo_Click(object sender, RoutedEventArgs e)
        {
            string msg="";
            HttpWebResponse resp=null;
            //WebRequest my = WebRequest.Create(@"http://www.google.com");
            //MessageBox.Show(my.ToString());
            WebRequest myRequest = WebRequest.Create(@"http://localhost/REST/RestServicesSample.svc/XmlData/sad");
            MessageBox.Show(myRequest.ToString());
            //Provides response from a URI.
            myRequest.Method = "GET";
            myRequest.ContentType = @"text/xml; charset=utf-8";
            try
            {
                 resp=myRequest.GetResponse() as HttpWebResponse;
            }
            catch (WebException c)
            {
                MessageBox.Show(c.ToString());
            }

            if (resp.StatusCode == HttpStatusCode.OK)
            {
                XmlDocument myXMLDocument = new XmlDocument();
                XmlReader myXMLReader = new XmlTextReader(resp.GetResponseStream());
                myXMLDocument.Load(myXMLReader);
                msg= myXMLDocument.InnerText;
            }
            MessageBox.Show(msg);
        }
    }
}

why do i get an error in myRequest.GetResponse()..? this is my .svc.cs file

为什么我在 myRequest.GetResponse().. 中收到错误？这是我的 .svc.cs 文件

using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
using System.ServiceModel.Web;

namespace RestServices
{
    // NOTE: You can use the "Rename" command on the "Refactor" menu to change the interface name "IRestServicesSample" in both code and config file together.
    [ServiceContract]
    public interface IRestServicesSample
    {
        [OperationContract]
        [WebGet]
        ////[WebInvoke(Method = "GET",
        ////    ResponseFormat = WebMessageFormat.Xml,
        ////    BodyStyle = WebMessageBodyStyle.Wrapped,
        ////    UriTemplate = "xml/{id}")]
       string XmlData(string id);
        //void DoWork();
        [OperationContract]
        [WebInvoke(Method = "GET",
            ResponseFormat = WebMessageFormat.Json,
            BodyStyle = WebMessageBodyStyle.Wrapped,
            UriTemplate = "json/{id}")]
        string JsonData(string id);
    }
}

---this is the web.config file

---这是 web.config 文件

<?xml version="1.0"?>
<configuration>

  <system.web>
    <compilation debug="true" targetFramework="4.0" />
    <webServices>
      <protocols>
        <add name="HttpGet"/>
        <add name="HttpPost"/>
      </protocols>
      </webServices>
  </system.web>
  <system.serviceModel>
    <services>
      <service name="RestServices.RestServiceSample" behaviorConfiguration="ServiceBehaviour">
        <endpoint behaviorConfiguration="WebBehavior" binding="webHttpBinding" contract="RestServices.IRestServiceSample">
        </endpoint>
      </service>`enter code here`
    </services>

    <behaviors>
      <serviceBehaviors>
        <behavior name="ServiceBehaviour">
          <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
          <serviceMetadata httpGetEnabled="true"/>
          <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
          <serviceDebug includeExceptionDetailInFaults="false"/>
        </behavior>
      </serviceBehaviors>
      <endpointBehaviors>
        <behavior name="WebBehavior">
          <webHttp/>
        </behavior>
        </endpointBehaviors>
    </behaviors>
    <serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
  </system.serviceModel>
 <system.webServer>
    <modules runAllManagedModulesForAllRequests="true"/>
  </system.webServer>

</configuration>

回答by Charlie Ou Yang

For service configuration please take a look at: Can't connect to rest webservice through c# client

服务配置请看：Can't connect to rest webservice through c# client

This is a sample C# client making a GET request

这是一个发出 GET 请求的示例 C# 客户端

string url = "localhost:8080/MyService.svc/Submit/" + "helloWorld";
string strResult = string.Empty;

HttpWebRequest webrequest = (HttpWebRequest)WebRequest.Create(url);
webrequest.Method = "GET";

// set content type based on what your service is expecting
webrequest.ContentType = "application/xml";

//Gets the response
WebResponse response = webrequest.GetResponse();

//Writes the Response
Stream responseStream = response.GetResponseStream();
StreamReader sr = new StreamReader(responseStream);
string s = sr.ReadToEnd();
return s;