ajax怎么实现文本框自动填值
来源：爱站网时间：2022-03-14编辑：网友分享
ajax怎么实现文本框自动填值你知道吗？其实我们只要利用服务器的文本框去查找用户的相关信息的时刻总要去刷新页面就可以了。下面是爱站技术频道网站小编给大家整理的一些内容，感兴趣可以自行参考下。
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：
<%@ 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]);
$("#qq").val(array[3]);
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div align="center">
<table style="text-align:center;width:800px">
<tr style=" background-color:Yellow; width:800px">
<td colspan='2' style="text-align:center"> <font size="5" color="red">用户详细信息</font></td>
</tr>
<tr><td colspan='2' style=" text-align:left"> 用户名称：<asp:TextBox ID="Txtusename" runat="server"></asp:TextBox></td></tr>
<tr><td style=" text-align:left;width:400px"> 用户全名：<asp:TextBox ID="fullname" runat="server" ReadOnly="true"></asp:TextBox></td><td style=" text-align:left; width:400px">用户邮箱：<asp:TextBox ID="Email" ReadOnly="true" runat="server"></asp:TextBox></td></tr>
<tr><td style=" text-align:left;width:400px">手机号码：<asp:TextBox runat="server" ID="mobilphone" ReadOnly="true"></asp:TextBox></td><td style=" text-align:left; width:400px">
用户QQ ：<asp:TextBox runat="server" ID="qq" ReadOnly="true"></asp:TextBox></td></tr>
</table>
</div>
</form>
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>通过用户名自动填充用户其他信息</title>
<script language="javascript" type="text/javascript" src="ajax/jquery.js"></script>
<script language="javascript" type="text/javascript">
//获取用户名文本框的值
function WritedataText()
{
var username=$("#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：
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;
}
}
}
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;
}
}
}
效果：运行前只有用户名文本框可用
当用户输入用户名称后：鼠标离开文本框后效果如下：
看完上述文章“ajax怎么实现文本框自动填值”后，想必大家伙都知道怎么处理比较好了吧！来关注爱站技术频道网站，遇到不懂的问题可以及时来联系小编。
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