利用DataGrid编辑、修改、删除记录

if exists (select * from dbo.sysobjects where
id = object_id(N''[dbo].[People]'') and OBJECTPROPERTY(id, N''IsUserTable'') = 1)
drop table [dbo].[People]
GO

CREATE TABLE [dbo].[People] (
[pkID] [int] IDENTITY (1, 1) NOT NULL ,
[FirstName] [char] (100) COLLATE Chinese_PRC_CI_AS NULL ,
[LastName] [char] (100) COLLATE Chinese_PRC_CI_AS NULL
) ON [PRIMARY]
GO

EditDataGridCS.aspx

<%@ Page Language="c#" debug="true"%>
<%@ Import Namespace="System.Data"%>
<%@ Import Namespace="System.Data.SqlClient" %>
<script runat="server">
//make first sql
String sql = "";
String strCnn = "Data Source=.;Initial Catalog=aa;User Id=sa;Password=;";
//create a datasource function
public ICollection CreateDataSource () {
SqlConnection conn = new SqlConnection(strCnn);
SqlDataAdapter db_sqladaptor = new SqlDataAdapter(sql,conn);
DataSet ds = new DataSet();
db_sqladaptor.Fill(ds,"MyDataResult");
DataView myView = ds.Tables["MyDataResult"].DefaultView;
return myView;
}

//do page load
public void Page_Load(Object sender, EventArgs e) {
strCnn = "Data Source=.;Initial Catalog=aa;User Id=sa;Password=;";
if (!IsPostBack)
{
sql = "Select * FROM People";
People.DataSource = CreateDataSource();
People.DataBind();
}
}
public void Page_Grid(Object sender, DataGridPageChangedEventArgs e)
{
sql = "Select * FROM People";
// Set CurrentPageIndex to the page the user clicked.
People.CurrentPageIndex = e.NewPageIndex;
// Rebind the data.
People.DataSource = CreateDataSource();
People.DataBind();
}

public void People_Edit(Object sender, DataGridCommandEventArgs e)
{
sql = "Select * FROM People";
People.EditItemIndex = e.Item.ItemIndex;
People.DataSource = CreateDataSource();
People.DataBind();
}

public void People_Cancel(Object sender, DataGridCommandEventArgs e)
{
sql = "Select * FROM People";
People.EditItemIndex = -1;
People.DataSource = CreateDataSource();
People.DataBind();
}

public void People_Update(Object sender, DataGridCommandEventArgs e)
{
string FirstName = ((TextBox)e.Item.Cells[1].Controls[1]).Text;
string LastName = ((TextBox)e.Item.Cells[2].Controls[1]).Text;

SqlConnection connUpdate = new SqlConnection(strCnn);
connUpdate.Open();
String sql_edit = "UPDATE People " +
"SET FirstName = ''" + FirstName.Replace("''","''''")+ "''," +
"LastName = ''" + LastName.Replace("''","''''")+ "''" +
" WHERE pkID = " + e.Item.Cells[0].Text;
SqlCommand sqlCommandUpdate = new SqlCommand(sql_edit,connUpdate);
sqlCommandUpdate.ExecuteNonQuery();
connUpdate.Close();

sql = "Select * FROM People";
People.EditItemIndex = -1;
People.DataSource = CreateDataSource();
People.DataBind();
}

public void People_Delete(Object sender, DataGridCommandEventArgs e) {
SqlConnection connDel = new SqlConnection(strCnn);
connDel.Open();
String sql_Del = "DELETE FROM People " +
" WHERE pkID = " + e.Item.Cells[0].Text;

SqlCommand sqlCommandDel = new SqlCommand(sql_Del,connDel);
sqlCommandDel.ExecuteNonQuery();
connDel.Close();

sql = "Select * FROM People";
People.EditItemIndex = -1;
People.DataSource = CreateDataSource();
People.DataBind();
}
</script>

<font face="arial" size="3">
<b>Edit People</b>
</font>
<br>
<form runat="server">
<asp:DataGrid id="People" runat="server"
BorderColor="green"
Width="640"
PageSize="5"
AllowPaging="true"
OnPageIndexChanged="Page_Grid"
BorderWidth="1"
CellPadding="3"
AutoGenerateColumns="false"
ShowHeader="true"
Visible="true"

OnEditCommand="People_Edit"
OnCancelCommand="People_Cancel"
OnUpdateCommand="People_Update"
OnDeleteCommand="People_Delete">

<HeaderStyle BorderColor="White" BackColor="black"
ForeColor="White"
Font-Bold="True"
Font-Name="Arial"
Font-Size="9" HorizontalAlign="Center"/>

<ItemStyle BorderColor=""
BackColor="#FFFFF0"
ForeColor="Black"
Font-Name="Arial"
Font-Size="8"
Font-Bold="False" HorizontalAlign="Center"/>

<EditItemStyle BorderColor=""
BackColor="#FFFFF0"
ForeColor="Black"
Font-Name="Arial"
Font-Size="7"
Font-Bold="False" HorizontalAlign="Center"/>

<PagerStyle Mode="NumericPages" Font-Size="8"/>
<Columns>
<asp:BoundColumn HeaderText="ID" ReadOnly="true" DataField="pkID"/>
<asp:TemplateColumn>
<HeaderTemplate>
<b> First Name </b>
</HeaderTemplate>
<ItemTemplate>
<asp:Label
Text=''<%# DataBinder.Eval(Container.DataItem, "FirstName").ToString().Trim() %>''
runat="server"/>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox id="FirstName" Text=''
<%# DataBinder.Eval(Container.DataItem, "FirstName").ToString().Trim() %>''
runat="server" Width="100%"/>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn>
<HeaderTemplate>
<b> Last Name </b>
</HeaderTemplate>
<ItemTemplate>
<asp:Label
Width="200"
Text=''<%# DataBinder.Eval(Container.DataItem, "LastName").ToString().Trim() %>''
runat="server"/>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox id="LastName" Text=''<br>
<%# DataBinder.Eval(Container.DataItem, "LastName").ToString().Trim() %>''
runat="server" Width="100%"/>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:EditCommandColumn
ButtonType="LinkButton"
CancelText="Cancel"
EditText="Edit"
UpdateText="Update" />
<asp:ButtonColumn Text= "Delete" CommandName="Delete"></asp:ButtonColumn>
</Columns>
</asp:DataGrid>
</form>