做了一个示例，用户更新的数据保存在Session中，点击“更新数据源”按钮后将Session中的数据更新到数据库中，可以在 http://www.webdiyer.com/demo/editdatagrid.aspx 看到演示效果：
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++){ DataRow row=table.Rows[i]; //如果选中了删除复选框，就直接就该行数据删除，不用再更新，否则更新该行数据 if(row!=null&&row.RowState!=DataRowState.Deleted){ if((int)row["id"]==id){ if(!isDelete){ row["name"]=name; row["age"]=age; row["address"]=address; } else row.Delete(); } } } msglbl.Text="更新数据表成功！"; } void UpdateDataBase(object src,EventArgs e){ try{ DataTable table=GetTableFromSession(); SqlCommandBuilder cmdbd=new SqlCommandBuilder(adapter); adapter.Update(table); msglbl.Text="更新数据源成功！"; cancelbtn.Enabled=false; } catch(Exception ex){ msglbl.Text="更新数据源失败，出现意外错误："+ex.Message; } BindData(); } void CancelUpdate(object src,EventArgs e){ DataTable table=GetTableFromSession(); table.RejectChanges(); grid.CurrentPageIndex=0; BindData(); cancelbtn.Enabled=false; } void AddNewEmployee(object src,DataGridCommandEventArgs e){ if(e.CommandName=="Add"){ try{ DataTable table=GetTableFromSession(); string name=((TextBox)e.Item.FindControl("newname")).Text; byte age=byte.Parse(((TextBox)e.Item.FindControl("newage")).Text); string address=((TextBox)e.Item.FindControl("newaddress")).Text; DataRow row=table.NewRow(); row["name"]=name; row["age"]=age; row["address"]=address; table.Rows.Add(row); SaveTableToSession(table); //重新绑定数据 BindData(); msglbl.Text="添加新记录成功！"; cancelbtn.Enabled=true; } catch(Exception ex){ msglbl.Text="未能添加新记录，出现意外错误："+ex.Message; } } } //将DataTable保存到session中 void SaveTableToSession(DataTable table){ Session[DataTableName]=table; } //从Session中获取DataTable DataTable GetTableFromSession(){ DataTable table=(DataTable)Session[DataTableName]; if(table!=null){ return table; } else{ msglbl.Text="未能从Session中获取数据，可能Session已超时，请刷新或重新打开当前页面！"; return null; } } </script> <html> <head> <title> Webdiyer制造：）</title> <META NAME="Generator" CONTENT="EditPlus"> <META NAME="Author" CONTENT="Webdiyer(http://www.webdiyer.com)"> </head> <body> <form runat="server"> <asp:DataGrid runat="server" id="grid" AutogenerateColumns=false DataKeyField="id" ShowFooter=true AllowPaging=true PageSize=5 OnPageIndexChanged="ChangePage" PagerStyle-Mode="numericpages" OnItemCommand="AddNewEmployee"> <Columns> <asp:TemplateColumn HeaderText="姓名"> <ItemTemplate> <asp:TextBox runat="server" id="name" Text='<%#DataBinder.Eval(Container.DataItem,"name")%>'/> </ItemTemplate> <FooterTemplate> <asp:TextBox runat="server" id="newname"/> </FooterTemplate> </asp:TemplateColumn> <asp:TemplateColumn HeaderText="年龄"> <ItemTemplate> <asp:TextBox runat="server" id="age" Text='<%#DataBinder.Eval(Container.DataItem,"age")%>'/> </ItemTemplate> <FooterTemplate> <asp:TextBox runat="server" id="newage"/> </FooterTemplate> </asp:TemplateColumn> <asp:TemplateColumn HeaderText="住址"> <ItemTemplate> <asp:TextBox runat="server" id="address" Text='<%#DataBinder.Eval(Container.DataItem,"address")%>'/> </ItemTemplate> <FooterTemplate> <asp:TextBox runat="server" id="newaddress"/> </FooterTemplate> </asp:TemplateColumn> <asp:TemplateColumn HeaderText="删除"> <ItemTemplate> <asp:CheckBox runat="server" id="delckb"/> </ItemTemplate> <FooterTemplate> <asp:Button runat="server" Text="添加" CommandName="Add"/> </FooterTemplate> </asp:TemplateColumn> </Columns> </asp:DataGrid> <asp:Label runat="server" EnableViewState="false" id="msglbl" ForeColor="red"/> <div> <asp:Button runat="server" id="updatebtn" Text="更新数据表" OnClick="UpdateDataTable"/> <asp:Button runat="server" id="cancelbtn" Text="取消对数据表的更新" Enabled=false OnClick="CancelUpdate"/> <asp:Button runat="server" id="updatedbtbn" Text="更新数据源" OnClick="UpdateDataBase"/> </div> <div> 说明：DataGrid中的数据类型都没有进行验证，如果输入错误的数据类型或空值可能会出错，实际应用中应该对用户输入的数据进行验证！ </div> </form> </body> </html> 数据库中employees表结构： CREATE TABLE employees ( [id] [int] IDENTITY (1, 1) NOT NULL , [name] [nvarchar] (10) COLLATE Chinese_PRC_CI_AS NOT NULL , [age] [tinyint] NOT NULL , [address] [nvarchar] (50) COLLATE Chinese_PRC_CI_AS NOT NULL ) ON [PRIMARY] GO ALTER TABLE employees ADD CONSTRAINT [PK_employees] PRIMARY KEY CLUSTERED ( [id] ) ON [PRIMARY] GO