<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %> 

<!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>gridview 批量刪除</title> 
</head> 
<body> 
    <form id="form1" runat="server"> 
    <div> 
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false"> 
<Columns>     
        <asp:BoundField DataField="vote_id" HeaderText="編號" /> 
        <asp:BoundField DataField="vote_name" HeaderText="名稱" />  
    <asp:TemplateField HeaderText="選擇"> 
        <ItemTemplate> 
            <asp:CheckBox id="cbxId" runat="Server" /> 
        </ItemTemplate> 
    </asp:TemplateField> 
</Columns> 
</asp:GridView> 
        <asp:Button ID="Button1" runat="server" Text="刪除選中" OnClick="Button1_Click" /> 

    </div> 
    </form> 
</body> 
</html> 

Default.aspx.cs

復制代碼代碼如下:

using System; 
using System.Data; 
using System.Configuration; 
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; 

//引入命名空間 
using System.Data.SqlClient; 
public partial class _Default : System.Web.UI.Page  
{ 
    protected void Page_Load(object sender, EventArgs e) 
    { 
        //判斷回發(fā)是否要執(zhí)行 
        if (!IsPostBack) 
        { 
            dataInit(); 
        } 
    } 
    //返回一個連接對象 
    private SqlConnection getCon() 
    { 
        return new SqlConnection(ConfigurationManager.ConnectionStrings["voteConnectionString"].ToString()); 
    } 
    //初始化數(shù)據(jù) 
    private void dataInit() 
    { 
        string sqlText = "select * from vote"; 
        SqlConnection conn = getCon(); 
        SqlDataAdapter da = new SqlDataAdapter(sqlText,conn); 
        DataSet ds = new DataSet(); 
        conn.Open(); 
        da.Fill(ds, "vote"); 
        GridView1.DataSource = ds; 
        GridView1.DataKeyNames = new string[]{"vote_id"}; 
        GridView1.DataBind(); 
        conn.Close(); 
        conn.Dispose(); 
    } 

    protected void Button1_Click(object sender, EventArgs e) 
    { 
        string sqlText = "("; 
        for (int i = 0; i < GridView1.Rows.Count; i++) 
        { 
            //搜索第n行3列 
            CheckBox cbx = (CheckBox)GridView1.Rows[i].FindControl("cbxId"); 
            if (cbx.Checked == true) 
            { 
               sqlText = sqlText + Convert.ToInt32(GridView1.DataKeys[i].Value) + ","; 
            } 
        } 
        //去掉最后的逗號，并且加上右括號 
        sqlText = sqlText.Substring(0,sqlText.Length - 1) + ")"; 
        sqlText = "delete vote where vote_id in" + sqlText; 
        try 
        { 
            //執(zhí)行刪除語句 
            SqlConnection conn = getCon(); 
            conn.Open(); 
            SqlCommand cmd = new SqlCommand(sqlText,conn); 
            int delCount = Convert.ToInt32(cmd.ExecuteNonQuery()); 
            Response.Write("<script>alert('共刪除" + delCount + "條數(shù)據(jù)');</script>"); 
            dataInit(); 

        } 
        catch(Exception ex) 
        { 
            //若有錯誤發(fā)生，輸出錯誤信息 
            Response.Write(ex.Message); 
        } 
    } 
} 