C# ajax跨域

• webconfig的<system.webServer>内允许所有域访问

<httpProtocol>
  <customHeaders>
    <add name="Access-Control-Allow-Methods" value="OPTIONS,POST,GET"/>
    <add name="Access-Control-Allow-Headers" value="x-requested-with,content-type"/>
    <add name="Access-Control-Allow-Origin" value="*" />
  </customHeaders>
 </httpProtocol>

• 访问的ajax,改一下contentType,dataType, data处理一下确保传字符串

var jsonStr = {'userID':1};
  $.ajax({
    type: "post", //要用post方式
        url: "http://url/ajax/mOperate.asmx/getMemberInfo",
        contentType: "application/x-www-form-urlencoded; charset=utf-8",
        data: toStr(jsonStr),
        dataType: "text",
        success: function (data) {
            console.log(data)
        },
        error: function (XMLHttpRequest, textStatus, errorThrown) {
            console.log(XMLHttpRequest);
            console.log(textStatus);
            console.log(errorThrown);
            console.log("error");
        }

        });
    function toStr(obj) {
        var str = [];
        for (var p in obj) {
            str.push(encodeURIComponent(p) + "=" + encodeURIComponent(obj[p]));
        }
        return str.join("&");
    }

结束，这样就跨域可以了，比较简单方便