DataGrid 完全攻略之七（实现选择、编辑和修改）

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
namespace MsDataGrid
{
    /**//// <summary>
    /// WebForm1 的摘要说明。
    /// </summary>
    public class UserDelete : System.Web.UI.Page
    {
        protected System.Web.UI.WebControls.DataGrid dgShow;
    
        private void Page_Load(object sender, System.EventArgs e)
        {
            // 在此处放置用户代码以初始化页面
            if(!IsPostBack)
                BindData();
            
        }
        private void BindData()
        {
            string strCon = System.Configuration.ConfigurationSettings.AppSettings["DSN"];
            SqlConnection con = new SqlConnection(strCon);
            SqlDataAdapter da = new SqlDataAdapter("Select * from tbStudentinfo",con);
            DataSet ds = new DataSet();
            da.Fill(ds,"studentinfo");
            dgShow.DataSource = ds.Tables["studentinfo"].DefaultView;
            dgShow.DataBind();
        }
        Web Form Designer generated code#region Web Form Designer generated code
        override protected void OnInit(EventArgs e)
        {
            //
            // CODEGEN：该调用是 ASP.NET Web 窗体设计器所必需的。
            //
            InitializeComponent();
            base.OnInit(e);
        }
        
        /**//// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {    
            this.dgShow.ItemCreated += new System.Web.UI.WebControls.DataGridItemEventHandler(this.dgShow_ItemCreated);
            this.dgShow.ItemCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.dgShow_ItemCommand);
            this.dgShow.PageIndexChanged += new System.Web.UI.WebControls.DataGridPageChangedEventHandler(this.dgShow_PageIndexChanged);
            this.dgShow.CancelCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.dgShow_CancelCommand);
            this.dgShow.EditCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.dgShow_EditCommand);
            this.dgShow.UpdateCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.dgShow_UpdateCommand);
            this.dgShow.DeleteCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.dgShow_DeleteCommand);
            this.Load += new System.EventHandler(this.Page_Load);

        }
        #endregion

        private void dgShow_EditCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
        {
            dgShow.EditItemIndex = e.Item.ItemIndex;
            BindData();

        }
        private void dgShow_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
        {
            dgShow.CurrentPageIndex = e.NewPageIndex;
            BindData();
        }
        private void dgShow_CancelCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
        {
            dgShow.EditItemIndex = -1;
            BindData();
        }

        private void dgShow_DeleteCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
        {
            if(dgShow.Items.Count==1)
            {
                if(dgShow.CurrentPageIndex!=0)
                    dgShow.CurrentPageIndex = dgShow.CurrentPageIndex-1;
            }
            string strSql = "delete from tbStudentinfo where studentid="+e.Item.Cells[0].Text+"";
            ExecuteSql(strSql);
            BindData();

        }
        /**/////////////////////////////////////////////////////////////
        //说明：执行制定SQL语句/////////////////////////////////////
        /**////////////////////////////////////////////////////////////
        private void ExecuteSql(string strSql)
        {
            try
            {
                string strconn = System.Configuration.ConfigurationSettings.AppSettings["DSN"];//从Web.config中读取
                SqlConnection conn =new SqlConnection(strconn);
                SqlCommand com = new SqlCommand(strSql,conn);
                conn.Open();
                com.ExecuteNonQuery();
                conn.Close();
            } 
            catch(Exception e)
            {
                Response.Write("<script language = 'javascript'>alert('"+e.Message+"');</script>") ;
                            
            }
        }

        private void dgShow_UpdateCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
        {
            string strStudentID = e.Item.Cells[0].Text;//处于非编辑状态
            string strName = ((TextBox)(e.Item.Cells[1].Controls[0])).Text;//处于编辑状态
            string strPass =((TextBox)(e.Item.Cells[2].Controls[0])).Text;
            string strSex = ((CheckBox)(e.Item.Cells[3].FindControl("cbSex"))).Checked?"1":"0";
            string strBirthday =((TextBox)(e.Item.Cells[4].Controls[0])).Text;
            string strEmail =((TextBox)(e.Item.Cells[5].Controls[0])).Text;
            string strSql = "update tbStudentinfo set StudentName='"+strName+"',StudentPass='"+strPass+"'";
            strSql +=",Sex="+strSex+",Birthday='"+strBirthday+"',Email='"+strEmail+"' where studentid="+strStudentID+"";
            ExecuteSql(strSql);
            dgShow.EditItemIndex = -1;
            BindData();

        }

        private void dgShow_ItemCreated(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
        {
            switch(e.Item.ItemType)
            {
                case ListItemType.Item:
                case ListItemType.EditItem:
                case ListItemType.AlternatingItem:
                    Button       myDeleteButton = (Button)e.Item.FindControl("btnDelete");
                    myDeleteButton.Text = "删除此行";
                    myDeleteButton.Attributes.Add("onclick", "return confirm('您真的要删除第 " + e.Item.ItemIndex.ToString() + " 行吗？');");
                    break;
            }
        }

        private void dgShow_ItemCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
        {
            if(e.CommandName=="UserDelete")
                dgShow_DeleteCommand(source,e);
        }
    }
}

前台代码：html

<%@ Page language="c#" Codebehind="UserDelete.aspx.cs" AutoEventWireup="false" Inherits="MsDataGrid.UserDelete" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
    <HEAD>
        <title>DataGrid使用举例</title>
        <meta name="GENERATOR" Content="Microsoft Visual Studio 7.0">
        <meta name="CODE_LANGUAGE" Content="C#">
        <meta name="vs_defaultClientScript" content="JavaScript">
        <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
    </HEAD>
    <body MS_POSITIONING="GridLayout">
        <form id="Form1" method="post" runat="server">
            <FONT face="宋体">
                <asp:DataGrid id="dgShow" style="Z-INDEX: 101; LEFT: 69px; POSITION: absolute; TOP: 90px" runat="server" Width="842px" Height="172px" BorderColor="Tan" BorderWidth="1px" BackColor="LightGoldenrodYellow" CellPadding="2" GridLines="None" ForeColor="Black" AutoGenerateColumns="False" AllowPaging="True">
                    <SelectedItemStyle ForeColor="GhostWhite" BackColor="DarkSlateBlue"></SelectedItemStyle>
                    <AlternatingItemStyle BackColor="PaleGoldenrod"></AlternatingItemStyle>
                    <HeaderStyle Font-Bold="True" BackColor="Tan"></HeaderStyle>
                    <FooterStyle BackColor="Tan"></FooterStyle>
                    <Columns>
                        <asp:BoundColumn DataField="StudentID" ReadOnly="True" HeaderText="学生ID"></asp:BoundColumn>
                        <asp:BoundColumn DataField="StudentName" HeaderText="学生姓名"></asp:BoundColumn>
                        <asp:BoundColumn DataField="StudentPass" HeaderText="密码"></asp:BoundColumn>
                        <asp:BoundColumn DataField="Sex" HeaderText="性别"></asp:BoundColumn>
                        <asp:BoundColumn DataField="Birthday" HeaderText="生日"></asp:BoundColumn>
                        <asp:BoundColumn DataField="Email" HeaderText="邮件地址"></asp:BoundColumn>
                        <asp:TemplateColumn HeaderText="性别模板列">
                            <ItemTemplate>
                                <asp:RadioButton id=RadioButton2 runat="server" Text="男" Checked='<%# DataBinder.Eval(Container, "DataItem.Sex") %>' Enabled="False">
                                </asp:RadioButton>
                                <asp:RadioButton id=RadioButton1 runat="server" Text="女" Checked='<%# !(bool)DataBinder.Eval(Container, "DataItem.Sex") %>' Enabled="False">
                                </asp:RadioButton>
                            </ItemTemplate>
                            <EditItemTemplate>
                                <asp:RadioButton id=cbSex runat="server" Text="男" Checked='<%# DataBinder.Eval(Container, "DataItem.Sex") %>' GroupName="Sex">
                                </asp:RadioButton>
                                <asp:RadioButton id=RadioButton4 runat="server" Text="女" Checked='<%# !(bool)DataBinder.Eval(Container, "DataItem.Sex") %>' GroupName="Sex">
                                </asp:RadioButton>
                            </EditItemTemplate>
                        </asp:TemplateColumn>
                        <asp:ButtonColumn Text="选择" HeaderText="选择" CommandName="Select"></asp:ButtonColumn>
                        <asp:EditCommandColumn ButtonType="LinkButton" UpdateText="更新" HeaderText="操作" CancelText="取消" EditText="编辑"></asp:EditCommandColumn>
                        <asp:ButtonColumn Text="删除" HeaderText="删除" CommandName="Delete"></asp:ButtonColumn>
                        <asp:TemplateColumn HeaderText="自定义删除">
                            <ItemTemplate>
                                <asp:Button id="btnDelete" runat="server" CommandName="UserDelete" Text="删除"></asp:Button>
                            </ItemTemplate>
                        </asp:TemplateColumn>
                        <asp:HyperLinkColumn Text="点击查看" DataNavigateUrlField="StudentID" DataNavigateUrlFormatString="Show.aspx?ID={0}" DataTextField="StudentName" HeaderText="详细信息"></asp:HyperLinkColumn>
                    </Columns>
                    <PagerStyle HorizontalAlign="Center" ForeColor="DarkSlateBlue" BackColor="PaleGoldenrod"></PagerStyle>
                </asp:DataGrid></FONT>
        </form>
    </body>
</HTML>