Материал из .Net Framework эксперт
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Use OleDbCommandBuilder to create command
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="UsingCommandBuilder" %>
<!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 id="Head1" runat="server">
<title>Updating a DataSet with DbCommandBuilder</title>
</head>
<body>
<form id="form1" runat="server">
<div id="container">
<h1>Updating a DataSet with DbCommandBuilder</h1>
This example illustrates how to write the changes in a
<code>DataSet</code> using a <code>DbCommandBuilder</code>
<h2>Authors</h2>
<asp:GridView ID="grdAuthors" runat="server" />
<asp:Label ID="labMsg" runat="server" />
</div>
</form>
</body>
</html>
File: Default.aspx.cs
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.OleDb;
public partial class UsingCommandBuilder : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string connString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=";
connString += Server.MapPath("~/Book.mdb") + ";";
DataSet ds = new DataSet();
try
{
OleDbConnection conn = new OleDbConnection(connString);
OleDbDataAdapter adapter = new OleDbDataAdapter();
string sqlSelect = " SELECT * FROM Authors";
OleDbCommand cmdSelect = new OleDbCommand(sqlSelect, conn);
adapter.SelectCommand = cmdSelect;
OleDbCommandBuilder cb = new OleDbCommandBuilder(adapter);
adapter.Fill(ds, "AuthorsTable");
DataRow dr1 = ds.Tables["AuthorsTable"].NewRow();
dr1["AuthorName"] = "A";
ds.Tables["AuthorsTable"].Rows.Add(dr1);
DataRow dr3 = ds.Tables["AuthorsTable"].Rows[0];
dr3["AuthorName"] = "B";
//ds.Tables["AuthorsTable"].Rows[2].Delete();
adapter.Update(ds, "AuthorsTable");
grdAuthors.DataSource = ds.Tables["AuthorsTable"].DefaultView;
grdAuthors.DataBind();
}
catch (Exception ex)
{
labMsg.Text = "Error occurred accessing the database";
labMsg.Text += "<br/>" + ex.Message;
}
}
}
