ajax 服务器文本框自动填值

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我是靠谱客的博主快乐鲜花，最近开发中收集的这篇文章主要介绍ajax 服务器文本框自动填值，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

这样的话就增加了服务器的负担。后面自己他细想了一下。想利用ajax去实现这样一个效果。代码如下：
前台代码：

复制代码代码如下:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ServerTextBoxdata.aspx.cs" Inherits="Default3" %> 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml" > 
<head runat="server"> 
<title>通过用户名自动填充用户其他信息</title> 
<script language="javascript" type="text/javascript" src="ajax/jquery.js"></script> 
<script language="javascript" type="text/javascript"> 
//获取用户名文本框的值 
function WritedataText() 
{ 
var username=$("#Txtusename").val(); 
if(username.length==0) 
{ 
alert("输入的用户名不能为空"); 
return ; 
} 
//执行通过用户名查找用户的相关信息 
$.ajax({ 
type:'POST', 
url:'ServerTextBoxdata.aspx', 
data:{action:'action',Username:username}, 
success:WritedataTextcallback 
}) 
} 
//通过用户名查找用户的相关信息的回调函数 
function WritedataTextcallback(r) 
{ 
if(r=="no") 
{ 
alert("输入的用户名不存在。请重新输入"); 
} 
else 
{ 
var data=r; 
var array=new Array(); 
array=data.split(","); 
//为文本框赋值 
$("#fullname").val(array[0]); 
$("#Email").val(array[1]); 
$("#mobilphone").val(array[2]); 
$("#qq").val(array[3]); 
} 
} 
</script> 
</head> 
<body> 
<form id="form1" runat="server"> 
<div align="center"> 
<table style="text-align:center;width:800px"> 
<tr style=" background-color:Yellow; width:800px"> 
<td colspan='2' style="text-align:center"> <font size="5" color="red">用户详细信息</font></td> 
</tr> 
<tr><td colspan='2' style=" text-align:left"> 用户名称：<asp:TextBox ID="Txtusename" runat="server"></asp:TextBox></td></tr> 
<tr><td style=" text-align:left;width:400px"> 用户全名：<asp:TextBox ID="fullname" runat="server" ReadOnly="true"></asp:TextBox></td><td style=" text-align:left; width:400px">用户邮箱：<asp:TextBox ID="Email" ReadOnly="true" runat="server"></asp:TextBox></td></tr> 
<tr><td style=" text-align:left;width:400px">手机号码：<asp:TextBox runat="server" ID="mobilphone" ReadOnly="true"></asp:TextBox></td><td style=" text-align:left; width:400px"> 
用户QQ  ：<asp:TextBox runat="server" ID="qq" ReadOnly="true"></asp:TextBox></td></tr> 
</table> 
</div> 
</form> 
</body> 
</html> 

后台代码：

复制代码代码如下:

using System; 
using System.Data; 
using System.Configuration; 
using System.Collections; 
using System.Web; 
using System.Web.Security; 
using System.Web.UI; 
using System.Web.UI.WebControls; 
using System.Web.UI.WebControls.WebParts; 
using System.Web.UI.HtmlControls; 
using System.Data.SqlClient; 
public partial class Default3 : System.Web.UI.Page 
{ 
string StrAction = ""; 
protected void Page_Load(object sender, EventArgs e) 
{ 
StrAction = Request["action"]; 
//为服务器控件添加失去焦点的事件 让服务器控件不刷新的关键 
Txtusename.Attributes.Add("onblur", "WritedataText()"); 
Txtusename.Focus(); 
if (StrAction == "action") 
{ 
//获取用户输入的名称 
string username = Request["Username"]; 
if (!Isusername(username)) 
{ 
Response.Clear(); 
Response.ContentType = "application/text"; 
Response.Write("no"); 
Response.End(); 
} 
else 
{ 
InitData(username); 
} 
} 
} 
/// <summary> 
/// 创建人：周昕 
/// 创建时间：2009-06-11 
/// 方法名称：InitData 
/// 作用：查找用户的详细信息 
/// </summary> 
/// <param name="username"></param> 
public void InitData(string username) 
{ 
SqlConnection mycon = new SqlConnection(); 
mycon.ConnectionString = ConfigurationManager.ConnectionStrings["BoBoConn"].ToString(); 
string sql = "select Fullname,Email,MobilePhone,QQ from loginuser where username='"+username+"'"; 
mycon.Open(); 
SqlCommand mycom = new SqlCommand(sql, mycon); 
SqlDataReader myda = mycom.ExecuteReader(); 
while (myda.Read()) 
{ 
string fullname = myda["Fullname"].ToString(); 
string Email = myda["Email"].ToString(); 
string MobilePhone = myda["MobilePhone"].ToString(); 
string QQ = myda["QQ"].ToString(); 
string array = fullname + "," + Email + "," + MobilePhone+","+QQ; 
Response.Clear(); 
Response.ContentType = "application/text"; 
Response.Write(array); 
Response.End(); 
} 
} 
/// <summary> 
/// 创建人：周昕 
/// 创建时间：2009-06-11 
/// 方法名称：Isusername 
/// 作用：返回bool值判断用户是否存在 
/// </summary> 
/// <param name="username"></param> 
/// <returns></returns> 
public bool Isusername(string username) 
{ 
SqlConnection mycon = new SqlConnection(); 
mycon.ConnectionString = ConfigurationManager.ConnectionStrings["BoBoConn"].ToString(); 
string sql = "select count(*) from loginuser where username='" + username + "'"; 
mycon.Open(); 
SqlCommand mycom = new SqlCommand(sql, mycon); 
int n = (int)mycom.ExecuteScalar(); 
mycon.Close(); 
if (n > 0) 
{ 
return true; 
} 
else 
{ 
return false; 
} 
} 
} 