ajax 服務器文本框自動填值

2024-09-01 08:31:42

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供稿：網友

最近二天。項目做完了。閑著沒事做就自己寫了一點東西。在寫的過程中。發現利用服務器的文本框去查找用戶的相關信息的時刻總要去刷新頁面。

這樣的話就增加了服務器的負擔。后面自己他細想了一下。想利用ajax去實現這樣一個效果。代碼如下：
前臺代碼：

復制代碼代碼如下:

<%@ 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>通過用戶名自動填充用戶其他信息</title>
<script language="javascript" type="text/javascript" src="ajax/jquery.js"></script>
<script language="javascript" type="text/javascript">
//獲取用戶名文本框的值
function WritedataText()
{
var username=$("#Txtusename").val();
if(username.length==0)
{
alert("輸入的用戶名不能為空");
return ;
}
//執行通過用戶名查找用戶的相關信息
$.ajax({
type:'POST',
url:'ServerTextBoxdata.aspx',
data:{action:'action',Username:username},
success:WritedataTextcallback
})
}
//通過用戶名查找用戶的相關信息的回調函數
function WritedataTextcallback(r)
{
if(r=="no")
{
alert("輸入的用戶名不存在。請重新輸入");
}
else
{
var data=r;
var array=new Array();
array=data.split(",");
//為文本框賦值
$("#fullname").val(array[0]);
$("#Email").val(array[1]);
$("#mobilphone").val(array[2]);
$("#qq").val(array[3]);
}
}
</script>
</head>
<body>
<form runat="server">
<div>
<table>
<tr>
<td colspan='2'> <font size="5" color="red">用戶詳細信息</font></td>
</tr>
<tr><td colspan='2'> 用戶名稱：<asp:TextBox runat="server"></asp:TextBox></td></tr>
<tr><td> 用戶全名：<asp:TextBox runat="server" ReadOnly="true"></asp:TextBox></td><td>用戶郵箱：<asp:TextBox ReadOnly="true" runat="server"></asp:TextBox></td></tr>
<tr><td>手機號碼：<asp:TextBox runat="server" ReadOnly="true"></asp:TextBox></td><td>
用戶QQ ：<asp:TextBox runat="server" ReadOnly="true"></asp:TextBox></td></tr>
</table>
</div>
</form>
</body>
</html>

后臺代碼：

復制代碼代碼如下:

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"];
//為服務器控件添加失去焦點的事件讓服務器控件不刷新的關鍵
Txtusename.Attributes.Add("onblur", "WritedataText()");
Txtusename.Focus();
if (StrAction == "action")
{
//獲取用戶輸入的名稱
string username = Request["Username"];
if (!Isusername(username))
{
Response.Clear();
Response.ContentType = "application/text";
Response.Write("no");
Response.End();
}
else
{
InitData(username);
}
}
}
/// <summary>
/// 創建人：周昕
/// 創建時間：2009-06-11
/// 方法名稱：InitData
/// 作用：查找用戶的詳細信息
/// </summary>
/// <param></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>
/// 創建人：周昕
/// 創建時間：2009-06-11
/// 方法名稱：Isusername
/// 作用：返回bool值判斷用戶是否存在
/// </summary>
/// <param></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;
}
}
}