作者：    来源：    点击：    日期：2007-2-17 23:27:20   

文件代码：
test.aspx
===========================>
<%@ Page Language="C#" Debug="True"%>
<%@Import Namespace="System.Data"%>
<%@ Import Namespace="System.Data.SqlClient" %>

<script language="C#" runat="server">
const string DataTableName="Employees";
SqlConnection conn;
SqlDataAdapter adapter;
void Page_Load(Object src, EventArgs e)
{
conn=new SqlConnection("server=(local);database=pubs;uid=sa;pwd=");
adapter=new SqlDataAdapter("select * from employees",conn);
if(!Page.IsPostBack){
BindData();
}
}

//绑定数据
void BindData(){
//先从Session中获取DataTable
DataTable table=(DataTable)Session[DataTableName];
//若Session中的DataTable不存在，则从数据库获取数据
if(table==null){
table=new DataTable();
adapter.Fill(table);
//将DataTable保存到Session中
SaveTableToSession(table);
table.Columns["id"].AutoIncrement=true;
}
grid.DataSource=table;
grid.DataBind();
}

void ChangePage(object src,DataGridPageChangedEventArgs e){
grid.CurrentPageIndex=e.NewPageIndex;
BindData();
}

void UpdateDataTable(object src,EventArgs e){
try{
DataTable table=GetTableFromSession();
string name;
byte age;
string address;
CheckBox ckdel;
for(int i=0;i<grid.Items.Count;i++){
DataGridItem dgitem=grid.Items[i];
int empId=(int)grid.DataKeys[dgitem.ItemIndex];
ckdel=dgitem.FindControl("delckb") as CheckBox;
name=((TextBox)dgitem.Cells[0].Controls[1]).Text;
age=byte.Parse(((TextBox)dgitem.Cells[1].Controls[1]).Text);
address=((TextBox)dgitem.Cells[2].Controls[1]).Text;
UpdateEmployee(table,empId,name,age,address,ckdel.Checked);
}
SaveTableToSession(table);
cancelbtn.Enabled=true;
int rowcount=0;
foreach(DataRow row in table.Rows){
if(row.RowState!=DataRowState.Deleted)
rowcount++;
}
if(Math.Ceiling(rowcount/5.0)==grid.CurrentPageIndex&&grid.CurrentPageIndex>0)
grid.CurrentPageIndex-=1;
BindData();
msglbl.Text="更新数据表成功！";
}
catch(Exception ex){
msglbl.Text="更新数据表失败，出现意外错误："+ex.Message;
}
}


void UpdateEmployee(DataTable table,int id,string name,byte age,string address,bool isDelete){
for(int i=0;i<table.Rows.Count;i++){

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