Ajax跨域解决方案

GET方法
       var url = "http://192.168.1.175:20000/api/user/ GetUser?id=1";
            $.ajax({
                url: url,
                dataType: 'json',
                contentType: "application/json; charset=utf-8",
                processData: false,
                type: 'get',
                success: function (data) {
                    console.log(data);
                },
                error: function (XMLHttpRequest, textStatus, errorThrown) {
                 console.log(textStatus);                }
            });




  GET：   
    var url = "http://192.168.1.175:20000/api/user/GetUser?id=1";

            $.getJSON(url, "", function (jsonData) {
                console.log(jsonData);
            });

POST：
      var objData = {
                'ID': 1,
                'Name': '石榴',
                'Pwd': '123456'
            }
            var url = "http://192.168.1.175:20000/api/user/PostAddUser";
            $.post(url, objData, function (jsonData) {
                console.log(jsonData);
            });

　　

       $.ajax({
                url:"http://192.168.1.175:10001/test.ashx",
                dataType: 'jsonp',
                jsonp: "jsonpcallback",//用于后台接收 返回
                processData: false, 
                type:'get',
                success: function (data) {
                    console.log(data);

                },
                error:function(XMLHttpRequest, textStatus, errorThrown) {
                    alert(XMLHttpRequest.status);
                    alert(XMLHttpRequest.readyState);
                    alert(textStatus);
                }});

　　一般处理程序

        context.Response.ContentType = "application/json";
        
        string JsonData = "{\"TID\":\"1\",\"tList\":[{\"errcode\":\"快捷方式打开\",\"errmsg\":null,\"msgid\":null,\"expires_in\":\"20170301\",\"ticket\":\"4242\"},{\"errcode\":null,\"errmsg\":null,\"msgid\":null,\"expires_in\":\"20170301\",\"ticket\":\"4242\"}]}";
//必须和ajax [jsonp]对应
        String jsoncallback = context.Request["jsonpcallback"]; 
        context.Response.Write(jsoncallback + "(" + JsonData + ")");

　　IIS web.config 写上配置基本上能解决跨域问题(既API所在服务器) 

  <system.webServer>
    <httpProtocol>
      <customHeaders>
        <add name="Access-Control-Allow-Origin" value="*"/>
        <add name="Access-Control-Allow-Methods" value="GET,POST,PUT,DELETE,OPTIONS"/>
        <add name="Access-Control-Allow-Headers" value="Content-Type"/>
      </customHeaders>
    </httpProtocol>

  </system.webServer>

　　如果web.config不增加 需要增加以下代码 指定那个域可以访问 此接口

 

  //所有
   var result = new HttpResponseMessage { Content = new StringContent(josn, Encoding.GetEncoding("UTF-8"), "application/json") };
            //HttpResponseHeaders hrh = result.Headers;
            //hrh.Add("Access-Control-Allow-Origin", "*");

    
//指定域
response.setHeader("Access-Control-Allow-Origin", "http://localhost:9105");