普通的Ajax应用，结合javascript对html元素的动态操控，结合而成一个优美的效果。
还是用Ajax.net，设置与前篇文章一样，不再累述。
代码如下：
163photoTest.aspx.cs
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 _163photoTest : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
description.Text = GetDescription();
AjaxPro.Utility.RegisterTypeForAjax(typeof(_163photoTest));
}
//取数据库里的描述
protected string GetDescription()
{
try
{
string strComm = "select photo_description from tab_photo where photo_id=1";
SqlConnection myConn = new SqlConnection("user id=sa;password=123;Database =test;data source=z;");
myConn.Open();
SqlCommand myComm = new SqlCommand(strComm, myConn);
SqlDataReader myReader = myComm.ExecuteReader();
myReader.Read();
return myReader.GetString(0);
}
catch
{
return "";
}
}
[AjaxPro.AjaxMethod]
//将description保存进数据库 www.knowsky.com
public bool UpdateDesc(string description)
{
try
{
string strComm = "update tab_photo set photo_description='" + description + "' where photo_id=1";
SqlConnection myConn = new SqlConnection("user id=sa;password=123;Database =test;data source=z;");
myConn.Open();
SqlCommand myComm = new SqlCommand(strComm, myConn);
myComm.ExecuteNonQuery();
return true;
}
catch
{
return false;
}
}
}
163photoTest.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="163photoTest.aspx.cs" Inherits="_163photoTest" %>
<!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>无标题页</title>
<script language="javascript" type="text/javascript">
function display()
{
document.getElementById('descfield').style.display='block';
document.getElementById('descfield').value = document.getElementById('description').innerText ;
document.getElementById('description').style.display='none';
document.getElementById('save').style.display='block';
}
var s;
function UpdateDesc()
{
s= document.getElementById("descfield").value;
document.getElementById("descfield").value="正在保存";
_163photoTest.UpdateDesc(s,UpdateDesc_callback);
}
function UpdateDesc_callback(res)
{
if (res)
{
document.getElementById('description').style.display='block';
document.getElementById("description").innerText =s;
document.getElementById('descfield').style.display='none';
document.getElementById('save').style.display='none';
}
}
</script>
</head>
<body onload="document.getElementById('descfield').style.display='none';document.getElementById('save').style.display='none';">
<form id="form1" runat="server">
<div id="div1" onmousemove="this.style.backgroundColor='#C0C0FF';" onmouseout="this.style.backgroundColor='';" onclick="display()">
<asp:Label ID="description" runat="server" Text="Label"></asp:Label>
</div>
<input type="text" id ="descfield" />
<input type="button" id="update" value="修改描述" onclick="display()"/>
<input type="button" id="save" value="保存修改" onclick="UpdateDesc()"/>
<br />
</form>
</body>
</html>
出处：Coder at the Doorsill——风中聆听 BLOG
