Ajax实现网易相册样式的修改

最新推荐文章于 2025-12-26 15:09:21 发布

原创最新推荐文章于 2025-12-26 15:09:21 发布 · 906 阅读

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CC 4.0 BY-SA版权

文章标签：

#ajax #相册 #网易 #javascript #callback #string

本文介绍了一个结合Ajax和C#实现的简单应用，该应用能够从数据库中读取描述信息并允许用户通过网页进行修改和保存。通过具体的代码示例展示了如何在网页上动态显示和更新数据库中的数据。

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
    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:http://xuexi5.cn/html/2007-03/1840.htm