update.aspx.cs

点击“开始数据同步” 按钮后

using System.Data.OleDb;
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

namespace Mypb
{
    public partial class update : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            this.Title = "更新记录";
            DropDownList1.AutoPostBack = true;
            if (!IsPostBack)
            {
                OleDbConnection conn = new OleDbConnection();
                conn.ConnectionString = "Provider=Microsoft.Jet.OleDb.4.0;" + "Data Source = " + Server.MapPath("App_Data/Myphonebook.mdb");
                OleDbCommand com = new OleDbCommand("select * from 通信录", conn);
                DataSet ds = new DataSet();
                OleDbDataAdapter da = new OleDbDataAdapter();
                da.SelectCommand =com;
                da.Fill(ds,"通信录");
                DataTable dt = ds.Tables["通信录"];
                DataRow dRow = dt.Rows[0];
                TextBox1.Text = dRow["电话"].ToString();
                TextBox2.Text = dRow["Email"].ToString();
                conn.Close();
            }
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            OleDbConnection conn = new OleDbConnection();
            conn.ConnectionString = "Provider=Microsoft.Jet.OleDb.4.0;" + "Data Source = " + Server.MapPath("App_Data/Myphonebook.mdb");
            OleDbCommand com = new OleDbCommand("select * from 通信录", conn);
            DataSet ds = new DataSet();
            OleDbDataAdapter da = new OleDbDataAdapter();
            conn.Open();
            string strUpdate = "update 通信录 set 电话=" +"'"+ TextBox1.Text + "'," + "Email=" +"'"+ TextBox2.Text+"'"+ " where 姓名='" + DropDownList1.Text + "'";
            da.SelectCommand = com;
            da.Fill(ds, "通信录");
            OleDbCommand updateCom = new OleDbCommand(strUpdate,conn);
            da.UpdateCommand = updateCom;
            da.UpdateCommand.ExecuteNonQuery();
            conn.Close();
            Response.Write("<script language=javascript>alert('记录更新成功，请单击“返回”按钮回到主页面！');</script>");
        }

        protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
        {
            OleDbConnection conn = new OleDbConnection();
            conn.ConnectionString = "Provider=Microsoft.Jet.OleDb.4.0;" + "Data Source = " + Server.MapPath("App_Data/Myphonebook.mdb");
            OleDbCommand com = new OleDbCommand("select * from 通信录", conn);
            DataSet ds = new DataSet();
            OleDbDataAdapter da = new OleDbDataAdapter();
            da.SelectCommand = com;
            da.Fill(ds, "通信录");
            DataTable dt = ds.Tables["通信录"];
            int iname = DropDownList1.SelectedIndex;
            DataRow dRow = dt.Rows[iname];
            TextBox1.Text = dRow["电话"].ToString();
            TextBox2.Text = dRow["Email"].ToString();
            conn.Close();

        }

        protected void Button2_Click(object sender, EventArgs e)
        {
            Response.Redirect("default.aspx");
        }
    }
}