GridView控件修改、删除示例（修改含有DropDownList控件）

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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" %>

无标题页

                            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">

<%# Eval("card") %>

' runat="server" Width="140px" />

<%# Eval("xueliText")%>

' />

<%# Eval("price") %>

' runat="server" Width="90px" />

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 *,case xueli when '1' then ' 博士' when '2' then '硕士' when '3' then '学士 ' else '' end as xueliText FROM test01 where id<1000 and 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，也可以取得数据库中的数据绑定
            ddlxueli.Items.Clear();
            ddlxueli.Items.Add(new ListItem("博士", "1"));
            ddlxueli.Items.Add(new ListItem("硕士", "2"));
            ddlxueli.Items.Add(new ListItem("学士", "3"));
//
// 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