模板页显示Excel数据Gridview增删改查

<%@ Page Title="主页" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true"
    CodeBehind="Default.aspx.cs" Inherits="WebApplication1._Default" %>

<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
    <h2>
        欢迎使用 ASP.NET!
    </h2>
    <p>
        若要了解关于 ASP.NET 的详细信息，请访问 <a href="http://www.asp.net/cn" title="ASP.NET 网站">www.asp.net/cn</a>。
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            title="MSDN ASP.NET 文档">MSDN 上有关 ASP.NET 的文档</a>。
    </p>
    <p>
        <asp:Button ID="Button1" runat="server" Text="显示Excel数据"
            onclick="Button1_Click" />
    </p>
    <p>
        <asp:GridView ID="GridView1" runat="server" Width="100%">
            <Columns>
                <asp:TemplateField HeaderText="操作">
                    <ItemTemplate>
                        <asp:Button ID="Button3" runat="server" Text="删除"
                            CommandArgument='<%# Eval("编号") %>' onclick="Button3_Click" />
                        <asp:Button ID="Button4" runat="server" Text="编辑"
                            CommandArgument='<%# Eval("编号") %>' onclick="Button4_Click" />
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>
    </p>
    <p>
        编号:<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
    </p>
    <p>
        姓名:<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
    </p>
    <p>
        性别:&nbsp;<asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>
    </p>
    <p>
        <asp:Button ID="Button2" runat="server" Text="新增" onclick="Button2_Click" />
        <asp:Button ID="Button5" runat="server" Text="提交" onclick="Button5_Click"
            style="height: 21px" />
    </p>
    <p>
        &nbsp;</p>
    <p>
        &nbsp;</p>
    <p>
        &nbsp;</p>
    <p>
        &nbsp;</p>
</asp:Content>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.OleDb;

namespace WebApplication1
{
    public partial class _Default : System.Web.UI.Page
    {

        string connStr = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties='Excel 8.0;HDR=yes'";
        protected void Page_Load(object sender, EventArgs e)
        {
            string fileName = "content/student.xls";
            fileName = Server.MapPath(fileName);
            connStr = string.Format(connStr,fileName);//连接字符串

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
               //读取student.xls文件中的学生数据
            BindList();

        }

        private void BindList()
        {
            string sql = "select * from [Sheet1$]";
            OleDbConnection conn = new OleDbConnection(connStr);
            conn.Open();
            OleDbCommand cmd = new OleDbCommand(sql, conn);

            OleDbDataAdapter da = new OleDbDataAdapter(cmd);

            DataTable dt = new DataTable();
            da.Fill(dt);
            conn.Close();
            GridView1.DataSource = dt;
            GridView1.DataBind();
        }
        //新增
        protected void Button2_Click(object sender, EventArgs e)
        {
            string sql = "insert into [Sheet1$] values(@a,@b,@c)";
            OleDbConnection conn = new OleDbConnection(connStr);
            conn.Open();
            OleDbCommand cmd = new OleDbCommand(sql,conn);
            OleDbParameter[] pm = new OleDbParameter[];
            pm[] = new OleDbParameter("@a",TextBox1.Text);
            pm[] = new OleDbParameter("@b",TextBox2.Text);
            pm[] = new OleDbParameter("@c",TextBox3.Text);
            foreach (OleDbParameter item in pm)
            {
                cmd.Parameters.Add(item);
            }
            int i = cmd.ExecuteNonQuery();
            conn.Close();
            if (i>)
            {
                Response.Write("新增成功");
                BindList();
            }
            else
            {
                Response.Write("新增失败");
            }
        }
        //删除
        protected void Button3_Click(object sender, EventArgs e)
        {
            Button bt= sender as Button;
            string id = bt.CommandArgument;

        }
        //编辑
        protected void Button4_Click(object sender, EventArgs e)
        {
            string sql = "select * from [Sheet1$] where 编号=@a";
            Button bt = sender as Button;
            string id = bt.CommandArgument;
            OleDbParameter pm = new OleDbParameter("@a", id);
            OleDbConnection conn = new OleDbConnection(connStr);
            conn.Open();
            OleDbCommand cmd = new OleDbCommand(sql,conn);
            cmd.Parameters.Add(pm);
            OleDbDataReader sdr = cmd.ExecuteReader();
            bool b = sdr.Read();
            if (b==true)
            {
                TextBox1.Text = sdr["编号"].ToString();
                TextBox2.Text = sdr["姓名"].ToString();
                TextBox3.Text = sdr["性别"].ToString();
            }
            conn.Close();
        }
        //提交
        protected void Button5_Click(object sender, EventArgs e)
        {
            string sql = "update [Sheet1$] set 姓名=@b,性别=@c where 编号=@a";
            OleDbParameter[] pm = new OleDbParameter[];
            pm[] = new OleDbParameter("@a",TextBox1.Text);
            pm[] = new OleDbParameter("@b",TextBox2.Text);
            pm[] = new OleDbParameter("@c",TextBox3.Text);

            OleDbConnection conn = new OleDbConnection(connStr);
            conn.Open();
            OleDbCommand cmd = new OleDbCommand(sql,conn);
            foreach (OleDbParameter item in pm)
            {
                cmd.Parameters.Add(item);
            }
            int i = cmd.ExecuteNonQuery();
            conn.Close();
            if (i>)
            {
                BindList();
                Response.Write("修改成功");
            }
            else
            {
                Response.Write("修改失败");
            }
        }
    }
}