GridView控件修改、删除例子，修改时含有DropDownList控件。
示例运行效果图：
GridViewUp.aspx文件代码：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="GridViewUp.aspx.cs" Inherits="gridview_GridViewUp" %>
<!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></head><body> <form id="form1" runat="server"> <div> <table cellpadding="0" cellspacing="0" border="0" width="80%" style="font-size: 11px"> <tr> <td align="center"> <asp:GridView ID="GridView1" runat="server" Width="100%" CellPadding="4" ForeColor="#333333" AutoGenerateColumns="False" AllowPaging="True" PageSize="12" OnRowCancelingEdit="GridView1_RowCancelingEdit" OnRowEditing="GridView1_RowEditing" OnRowUpdating="GridView1_RowUpdating" OnRowDeleting="GridView1_RowDeleting" DataKeyNames="id,name" OnPageIndexChanging="GridView1_PageIndexChanging" DataMember="card,price" OnRowDataBound="GridView1_RowDataBound" GridLines="None"> <Columns> <asp:BoundField HeaderText="身份证号" DataField="card" Visible=false /> <asp:BoundField HeaderText="编号" DataField="id" ReadOnly="True" /> <asp:BoundField DataField="name" HeaderText="姓名" ReadOnly="True" /> <asp:TemplateField HeaderText="身份证号"> <ItemTemplate> <%# Eval("card") %> </ItemTemplate> <EditItemTemplate> <asp:TextBox ID="TBCard" Text='<%# Eval("card") %>' runat="server" Width="140px" /> </EditItemTemplate> <ItemStyle Width="150px" /> </asp:TemplateField> <asp:TemplateField HeaderText="学历"> <ItemTemplate> <%# Eval("description")%> </ItemTemplate> <EditItemTemplate> <asp:HiddenField ID="HDFXueli" runat="server" Value='<%# Eval("xueli") %>' /> <asp:DropDownList ID="DDLXueli" runat="server" Width="90px" /> </EditItemTemplate> <ItemStyle Width="100px" /> </asp:TemplateField> <asp:TemplateField HeaderText="价格"> <ItemTemplate> <%# Eval("price") %> </ItemTemplate> <EditItemTemplate> <asp:TextBox ID="TBPrice" Text='<%# Eval("price") %>' runat="server" Width="90px" /> </EditItemTemplate> <ItemStyle Width="100px" /> </asp:TemplateField> <asp:BoundField HeaderText="建立时间" DataField="createdate" ReadOnly="True" /> <asp:CommandField ShowDeleteButton="True" ShowEditButton="True" HeaderText="操作" /> </Columns> <PagerSettings FirstPageText="" LastPageText="" NextPageText="" PreviousPageText="" /> <RowStyle Height="20px" BackColor="#F7F6F3" ForeColor="#333333" /> <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" /> <EditRowStyle BackColor="#999999" /> <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" /> <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" /> <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" /> <AlternatingRowStyle BackColor="White" ForeColor="#284775" /> </asp:GridView> </td> </tr> </table> </div> </form></body></html>GridViewUp.aspx.cs文件代码：
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 gridview_GridViewUp : System.Web.UI.Page{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack) { GridViewBind();
} } protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e) { GridView1.PageIndex = e.NewPageIndex; GridViewBind(); } private void GridViewBind() { string connStr = ConfigurationManager.ConnectionStrings["ConnString"].ConnectionString; string SqlStr = "SELECT a.*,b.description FROM test01 a,xueli b where a.xueli=b.code and a.id<1000 and a.id>200"; DataSet ds = new DataSet(); try { SqlConnection conn = new SqlConnection(connStr); if (conn.State.ToString() == "Closed") conn.Open(); SqlDataAdapter da = new SqlDataAdapter(SqlStr, conn); da.Fill(ds, "test01"); if (conn.State.ToString() == "Open") conn.Close(); GridView1.DataSource = ds.Tables[0].DefaultView; GridView1.DataBind(); } catch (Exception ex) { Response.Write("数据库错误，错误原因：" + ex.Message); Response.End(); } } protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) { if (((DropDownList)e.Row.FindControl("DDLXueli")) != null) { DropDownList ddlxueli = (DropDownList)e.Row.FindControl("DDLXueli"); // 生成 DropDownList 的值，绑定数据 string connStr = ConfigurationManager.ConnectionStrings["ConnString"].ConnectionString; string SqlStr = "SELECT * from xueli"; DataSet ds = new DataSet(); SqlConnection conn = new SqlConnection(connStr); if (conn.State.ToString() == "Closed") conn.Open(); SqlDataAdapter da = new SqlDataAdapter(SqlStr, conn); da.Fill(ds, "xueli"); if (conn.State.ToString() == "Open") conn.Close(); ddlxueli.DataSource = ds.Tables[0].DefaultView; ddlxueli.DataTextField = "description"; ddlxueli.DataValueField = "code"; ddlxueli.DataBind(); // // 选中 DropDownList ddlxueli.SelectedValue = ((HiddenField)e.Row.FindControl("HDFXueli")).Value; // } } protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e) { GridView1.EditIndex = e.NewEditIndex; GridViewBind(); } protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e) { GridView1.EditIndex = -1; GridViewBind(); } protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e) { string id = GridView1.DataKeys[e.RowIndex].Values[0].ToString(); string card = ((TextBox)GridView1.Rows[e.RowIndex].FindControl("TBCard")).Text; string xueli = ((DropDownList)GridView1.Rows[e.RowIndex].FindControl("DDLXueli")).SelectedValue; string price = ((TextBox)GridView1.Rows[e.RowIndex].FindControl("TBPrice")).Text; string connStr = ConfigurationManager.ConnectionStrings["ConnString"].ConnectionString; string SqlStr = "update test01 set card='" + card + "',xueli='" + xueli + "',price='" + price + "' where id=" + id; try { SqlConnection conn = new SqlConnection(connStr); if (conn.State.ToString() == "Closed") conn.Open(); SqlCommand comm = new SqlCommand(SqlStr, conn); comm.ExecuteNonQuery(); comm.Dispose(); if (conn.State.ToString() == "Open") conn.Close(); GridView1.EditIndex = -1; GridViewBind(); } catch (Exception ex) { Response.Write("数据库错误，错误原因：" + ex.Message); Response.End(); } } protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e) { string id = GridView1.DataKeys[e.RowIndex].Values[0].ToString(); string connStr = ConfigurationManager.ConnectionStrings["ConnString"].ConnectionString; string SqlStr = "delete from test01 where id=" + id; try { SqlConnection conn = new SqlConnection(connStr); if (conn.State.ToString() == "Closed") conn.Open(); SqlCommand comm = new SqlCommand(SqlStr, conn); comm.ExecuteNonQuery(); comm.Dispose(); if (conn.State.ToString() == "Open") conn.Close(); GridView1.EditIndex = -1; GridViewBind(); } catch (Exception ex) { Response.Write("数据库错误，错误原因：" + ex.Message); Response.End(); } }
}sql server2000生成表代码：
CREATE TABLE [dbo].[test01] (
[id] [decimal](18, 0) IDENTITY (1, 1) NOT NULL ,
[name] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,
[card] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,
[xueli] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,
[price] [decimal](18, 0) NULL ,
[createdate] [datetime] NULL
) ON [PRIMARY]
GO
ALTER TABLE [dbo].[test01] ADD
CONSTRAINT [DF_test01_createdate] DEFAULT (getdate()) FOR [createdate],
CONSTRAINT [PK_test01] PRIMARY KEY CLUSTERED
(
[id]
) ON [PRIMARY]
GO
[id] [decimal](18, 0) IDENTITY (1, 1) NOT NULL ,
[name] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,
[card] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,
[xueli] [varchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,
[price] [decimal](18, 0) NULL ,
[createdate] [datetime] NULL
) ON [PRIMARY]
GO
ALTER TABLE [dbo].[test01] ADD
CONSTRAINT [DF_test01_createdate] DEFAULT (getdate()) FOR [createdate],
CONSTRAINT [PK_test01] PRIMARY KEY CLUSTERED
(
[id]
) ON [PRIMARY]
GO
CREATE TABLE [dbo].[xueli]( [id] [int] IDENTITY(1,1) NOT NULL, [code] [int] NULL, [description] [nvarchar](50) COLLATE Chinese_PRC_CI_AS NULL, CONSTRAINT [PK_xueli] PRIMARY KEY CLUSTERED ( [id] ASC)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]) ON [PRIMARY]