405方法不允许 - 当使用jquery ajax方法调用wcf服务

Question

当我尝试从$.ajax方法调用wcf服务时，我收到以下异常。

1. Failed to load resource: the server responded with a status of 405 (Method Not Allowed) 

2. Failed to load resource: No 'Access-Control-Allow-Origin' header is present on the requested resource. 

AJAX编码

$.ajax({ 
     type: "POST", 
     dataType: "json", 
     contentType: "application/json", 
     data: JSON.stringify(request), 
     async: false, 
     url: "http://localhost:65201/Empservice.svc/getEmployee", 
     crossdomain: true, 
     success: function (data) { 
      try { 
       response = data; 
      } 
      catch (e) { 
       alert(e); 
      } 
     }, 
     error: function (XMLHttpRequest, textStatus, errorThrown) { 
      alert("Excpetion " + errorThrown + XMLHttpRequest); 
     } 
    }); 

Answer 1

为了避免405不允许的方法错误尝试在WCF serivce添加以下代码指定什么的Global.asax file.it为我工作

protected void Application_BeginRequest(object sender, EventArgs e) 
    { 
     if (HttpContext.Current.Request.HttpMethod == "OPTIONS") 
     { 

      HttpContext.Current.Response.AddHeader("Access-Control-Allow-Headers", 
          "Accept, Content-Type,customHeader"); 

      HttpContext.Current.Response.AddHeader("Access-Control-Allow-Methods", 
          "POST,GET,OPTIONS"); 

      HttpContext.Current.Response.AddHeader("Access-Control-Max-Age", 
          "172800"); 

      HttpContext.Current.Response.AddHeader("Access-Control-Allow-Credentials", 
          "true"); 

      HttpContext.Current.Response.AddHeader("Access-Control-Expose-Headers", 
          "customHeader"); 

      HttpContext.Current.Response.AddHeader("Content-type", 
         "application/json"); 

      HttpContext.Current.Response.End(); 
     } 
     else 
     { 
      HttpContext.Current.Response.AddHeader("Access-Control-Allow-Headers", 
          "Accept, Content-Type,customHeader"); 


      HttpContext.Current.Response.AddHeader("Access-Control-Expose-Headers", 
          "customHeader"); 

      HttpContext.Current.Response.AddHeader("Content-type", 
         "application/json"); 

     } 


    }