OleDbDataAdapter is a part of the ADO.NET Data Provider. OleDbDataAdapter provides the communication between the Dataset and the Data Source with the help of OleDbConnection Object . The OleDbDataAdapter works with the DataSet to provide a disconnected data retrieval mechanism.
The SelectCommand property of the OleDbDataAdapter is a Command object that retrieves data from the data source. The Fill method takes its arguments a DataSet to be populated, and a DataTable object, or the name of the DataTable to be filled with the rows returned from the SelectCommand. The following C# program shows the OleDbDataAdapter using its SelectCommand property to retrieve the data from the Data Source.
using System;
using System.Data;
using System.Data.OleDb;
using System.Windows.Forms;
namespace WindowsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
string connetionString = null;
OleDbConnection connection ;
OleDbDataAdapter oledbAdapter = new OleDbDataAdapter();
DataSet ds = new DataSet();
int i = 0;
connetionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Your mdb filename;";
connection = new OleDbConnection(connetionString);
try
{
connection.Open();
oledbAdapter.SelectCommand = new OleDbCommand("Your SQL Statement Here", connection);
oledbAdapter.Fill(ds);
oledbAdapter.Dispose();
connection.Close();
for (i = 0; i <= ds.Tables[0].Rows.Count - 1; i++)
{
MessageBox.Show (ds.Tables[0].Rows[i].ItemArray[0].ToString());
}
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
}
}