A small basic example for getting started with JQuery (1)_jquery
First show the effect achieved by this example:
When the page is just loaded, it is displayed as shown in the picture:
After entering data in the text box, the red mark of the text box disappears, as shown in the figure:
After clicking the OK button, data will be output to the page through the background, as shown in the figure:
The front-end code is as follows (asp.net):
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title></title> <script src="js/jquery-1.9.1.min.js"></script> <script src="js/UserVerify.js"></script> <link href="css/StyleSheet.css" rel="stylesheet" /> </head> <body> <form id="form1" runat="server"> 请输入用户名：<input type="text" class="userName" id="userName" /><input type="button" id="verifyButton" value="确定" /> <div id="returnVal"></div> </form> </body> </html>
CSS()
.userName {
border:1px solid red;
background-image:url("../images/userVerify.gif");
background-position:bottom;
background-repeat:repeat-x;
} page is as follows:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string userName =HttpUtility.UrlDecode(Request.QueryString["userName"]);
//HttpContext.Current.Response.Write(userName);
if (userName != null)
{
Response.Write("您输入的是："+userName);
Response.End();
}
}
} The added UserVerify.js file is as follows:
/// <reference path="jquery-1.9.1.min.js" />
//上面这句话，可以在我们当前的JS里显示智能提示。
$("document").ready(function () {
var userName = $("#userName");
$("#verifyButton").click(function () {
var value = userName.val();
if (value=="") {
alert("请输入用户名！");
}
else {
//两次encodeURI解决中文乱码问题
$.get("Default.aspx?userName="+ encodeURI(encodeURI(value)), function (response) {
$("#returnVal").html(response);
});
}
});
userName.keyup(function () {
var value = userName.val;
if (value != "") {
userName.removeClass();
}
else {
userName.addClass();
}
});
}); A small introductory example of Jquery that is especially suitable for beginners to learn. I hope you will like it. Starting today, I will sort out the knowledge points about jquery for you. I hope you will continue to pay attention.
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