Ajax 使用(json)

来源：互联网发布：网络陈世美啥意思编辑：程序博客网时间：2024/05/29 04:25

function CheckValid() {

//用于存储报出的消息
var message = "";

            //判断是否输入标题
            if ($("#SystemTitle")[0].value == "") {
                message += "请输入标题！/n";

$("#SystemTitle").focus();
}

            //请输入主提人
            if ($("#SystemManageUser")[0].value == "") {
                message += "请输入主提人！/n";

                $("#SystemManageUser").focus();
            }
            //判断是否验证通过，如果不通过报出消息
            if (message != "") {
                alert(message);
                return false;
            }
        }

<!--（
var people = {
    UserName:"UserName1",
    Address:"Address1",
    Phone:"Phone1",
    HomePhone:"HomePhone1"
}

people.UserName="UserName1";

var peoples=
{ "programmers": [
    { "firstName": "Brett", "lastName":"McLaughlin", "email": "brett@newInstance.com" },
    { "firstName": "Jason", "lastName":"Hunter", "email": "jason@servlets.com" },
    { "firstName": "Elliotte", "lastName":"Harold", "email": "elharo@macfaq.com" }
   ],
"authors": [
    { "firstName": "Isaac", "lastName": "Asimov", "genre": "science fiction" },
    { "firstName": "Tad", "lastName": "Williams", "genre": "fantasy" },
    { "firstName": "Frank", "lastName": "Peretti", "genre": "christian fiction" }
   ],
"musicians": [
    { "firstName": "Eric", "lastName": "Clapton", "instrument": "guitar" },
    { "firstName": "Sergei", "lastName": "Rachmaninoff", "instrument": "piano" }
   ]
}

访问json数据：

peoples.authors[1].genre             // Value is "fantasy"
peoples.musicians[3].lastName            // Undefined. This refers to the fourth entry, and there isn't one
peoples.programmers.[2].firstName     // Value is "Elliotte"

修改json数据：

peoples.musicians[1].lastName = "Rachmaninov";

）-->

        //传入的是json文件格式的数据
        function callback(data){
           if(data!=null){
               document.getElementById("SystemManageUserName").value = data.UserName;
               document.getElementById("SystemManageUserAddress").value = data.Address;
               document.getElementById("SystemManageUserDepPhone").value = data.Phone;
               document.getElementById("SystemManageUserHomePhone").value = data.HomePhone;
           }
           else{
               document.getElementById("SystemManageUserName").value = "";
               document.getElementById("SystemManageUserAddress").value = "";
               document.getElementById("SystemManageUserDepPhone").value = "";
               document.getElementById("SystemManageUserHomePhone").value = "";
           }
        }

        function CheckSystemManageUserName(){
             if(<%=ViewData["SystemType"] %>=="1"){
                $.ajax({
                    type:"POST",
                    url:"/SystemInfo/CreateJsonParams",
                    data: "name=" + document.getElementById("SystemManageUserName").value+ "&UserType=2",//可以直接加一个函数名。
                    dataType:"json",
                    success:callback
                });
            }

            $.ajax({
                type: "POST",
                url: "/SystemInfo/CheckSystemUserName",
    ///SystemInfo/CheckSystemUserName页面要接受的参数str，SystemTypeCode
                data: "str=" + document.getElementById("SystemManageUserName").value+ "&SystemTypeCode="+<%=ViewData["SystemType"] %>,
                success: function (msg) {

//判断是否有返回值，如果有，则显示返回的信息到标签中
if (msg == null || msg == "") {

                        document.getElementById("SpanSystemManageUserName").innerHTML = "";
                    }
                    else {

document.getElementById("SpanSystemManageUserName").innerHTML = msg;

                    }
                },
    error:function(){
      alert("错误");
    }
            });
        }