Question

当我尝试从$.ajax方法调用wcf服务时，我得到了以下异常。

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

为避免405方法不允许出错，请尝试在wcf serivce Global.asax file.it中为我添加以下编码

 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");

        }


    }

405方法不允许 - 使用jquery ajax方法调用wcf服务

1 个答案: