使用Update型触发器时，更新操作包括两部分，即先将更新的内容去掉，然后将新值插入。因此，对于一个定义了update触发器的表来讲，当进行更新操作时，在删除表中存放了旧值，然后在插入表中存放新值
SQL
View Code
/*打开数据库*/
USE db_Tome2
/*判断表中是否有名为“基本工资触发器”的触发器*/
IF EXISTS (SELECT name
FROM sysobjects
WHERE name = 'trigger_systemLog'
AND type = 'TR')
/*如果已经存在则删除*/
DROP TRIGGER trigger_systemLog
GO
SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS ON
GO
/*创建新的触发器*/
CREATE trigger trigger_systemLog--触发器名称
ON admInfo03
FOR update
AS
/*参数声明*/
DECLARE @AN varchar(50),@AP varchar(50),@MD datetime
/*参数赋值*/
set @MD=getdate()
/*应用触发器中的INSERTED表临时存储参数*/
select @AN='用户名：'+admName+'---密码修改为'+admPass From INSERTED
/*SQL语句操作*/
insert into systemLog (modifyDate,remark) values (@MD,@AN)
GO
SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS ON
Default.aspx
View Code
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!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 id="Head1" runat="server">
<title>无标题页</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<table align="center" background="图片2 拷贝.jpg" border="0" cellpadding="0" cellspacing="0"
style="width: 473px; height: 275px">
<tr>
<td colspan="2" style="height: 103px" width="100%">
<table background="图片2 拷贝.jpg" border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td align="center" colspan="1" rowspan="5" style="background-image: none; width: 169px">
</td>
<td align="center" colspan="2">
<span style="font-size: 9pt; color: red"><strong>修改管理员密码</strong></span></td>
</tr>
<tr>
<td align="right" style="width: 100px; height: 19px">
<span style="font-size: 9pt"> </span></td>
<td style="width: 100px; height: 19px">
</td>
</tr>
<tr>
<td align="right" style="width: 100px; height: 24px;">
<span style="font-size: 9pt">管理员名称：</span></td>
<td style="width: 100px; height: 24px;">
<asp:TextBox ID="TextName" runat="server"></asp:TextBox></td>
</tr>
<tr>
<td align="right" style="width: 100px; height: 19px">
<span style="font-size: 9pt"> 管理员密码：</span></td>
<td style="width: 100px; height: 19px">
<asp:TextBox ID="TextPass" runat="server"></asp:TextBox></td>
</tr>
<tr>
<td align="right" style="width: 100px; height: 19px;">
<span style="font-size: 9pt"></span></td>
<td style="width: 100px; height: 19px;">
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="修改密码" Width="65px" /></td>
</tr>
</table>
<asp:Label ID="Label1" runat="server" BackColor="#FFC080" Font-Size="9pt" Text="修改后的信息显示如下:"></asp:Label></td>
</tr>
<tr>
<td style="width: 106px; height: 226px">
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" Width="190px" BackColor="#DEBA84" BorderColor="#DEBA84" BorderStyle="None" BorderWidth="1px" CellPadding="3" CellSpacing="2" Font-Size="9pt">
<Columns>
<asp:BoundField DataField="admName" HeaderText="管理员名称">
<HeaderStyle Font-Size="12pt" />
<ItemStyle Font-Size="10pt" />
</asp:BoundField>
<asp:BoundField DataField="admPass" HeaderText="管理员密码">
<HeaderStyle Font-Size="12pt" />
<ItemStyle Font-Size="10pt" />
</asp:BoundField>
</Columns>
<HeaderStyle BackColor="#A55129" Font-Bold="True" ForeColor="White" />
<RowStyle BackColor="#FFF7E7" ForeColor="#8C4510" />
<FooterStyle BackColor="#F7DFB5" ForeColor="#8C4510" />
<SelectedRowStyle BackColor="#738A9C" Font-Bold="True" ForeColor="White" />
<PagerStyle ForeColor="#8C4510" HorizontalAlign="Center" />
</asp:GridView>
</td>
<td style="width: 100px; height: 226px">
<asp:GridView ID="GridView2" runat="server" AutoGenerateColumns="False" BackImageUrl="~/背景图10.jpg"
Width="270px" CellPadding="4" ForeColor="#333333" GridLines="None" Font-Size="9pt">
<Columns>
<asp:BoundField DataField="modifyDate" HeaderText="修改日期">
<HeaderStyle Font-Size="12pt" />
<ItemStyle Font-Size="10pt" />
</asp:BoundField>
<asp:BoundField DataField="remark" HeaderText="备注">
<HeaderStyle Font-Size="12pt" />
<ItemStyle Font-Size="10pt" />
</asp:BoundField>
</Columns>
<HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
<FooterStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
<RowStyle BackColor="#FFFBD6" ForeColor="#333333" />
<SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="Navy" />
<PagerStyle BackColor="#FFCC66" ForeColor="#333333" HorizontalAlign="Center" />
<AlternatingRowStyle BackColor="White" />
</asp:GridView>
</td>
</tr>
</table>
</div>
</form>
</body>
</html>
Default.aspx.cs
View Code
using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
loadGridView1();
loadGriView2();
}
}
protected void loadGridView1()
{
SqlConnection con = new SqlConnection(ConfigurationSettings.AppSettings["strCon"]);
con.Open();
SqlDataAdapter sda = new SqlDataAdapter("select * from admInfo03", con);
DataSet ds = new DataSet();
sda.Fill(ds);
GridView1.DataSource = ds;
GridView1.DataBind();
con.Close();
}
protected void loadGriView2()
{
SqlConnection con = new SqlConnection(ConfigurationSettings.AppSettings["strCon"]);
con.Open();
SqlDataAdapter sda = new SqlDataAdapter("select * from systemLog03", con);
DataSet ds = new DataSet();
sda.Fill(ds);
GridView2.DataSource = ds;
GridView2.DataBind();
con.Close();
}
protected void Button1_Click(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection(ConfigurationSettings.AppSettings["strCon"]);
con.Open();
string str = "select count(*) from admInfo03 where admPass='" + TextPass.Text.ToString() + "'";
SqlCommand mycom = new SqlCommand(str, con);
int intcont = Convert.ToInt32(mycom.ExecuteScalar());
if (intcont > 0)
{
Response.Write("<script language=javascript>alert('对不起!您已经修改了此密码！')</script>");
return;
}
else
{
string sql = "update admInfo03 set admPass='" + TextPass.Text + "' where admName='" + TextName.Text + "'";
try
{
SqlCommand com = new SqlCommand(sql, con);
com.ExecuteNonQuery();
Response.Write("<script language=javascript>alert('修改密码成功！')</script>");
}
catch (Exception error)
{
Response.Write(error.ToString());
}
finally
{
con.Close();
loadGridView1();//在GridView1里显示管理员信息的方法；
loadGriView2();//在GridView2里显示系统日志的方法；
}
}
}
}