dataadapter.cs

Professional C# 2nd Edition

using System;
using System.Data;
using System.Xml;
using System.Data.SqlClient;
using System.Data.OleDb;

/// <summary>
/// Corresponds to section titled 'Using a stored proc in a DataAdapter' in Chapter 9
/// </summary>
public class DataAdapter
{
	/// <summary>
	/// DataAdapter - show Stored Proc and DataAdapter
	/// </summary>
	public static void Main ( )
	{
		// The following is the database connection string
		string			source = Login.Connection;

		// Create & open the database connection
		using ( SqlConnection	conn = new SqlConnection ( source ) )
		{
			conn.Open ( ) ;

			// Create a DataSet
			DataSet		ds = new DataSet ( ) ;

			// Create a data adapter to fill the DataSet
			SqlDataAdapter	da = new SqlDataAdapter ( ) ;

			// Set the data adapters select co
			da.SelectCommand = GenerateSelectCommand ( conn ) ;

			da.Fill ( ds , "Region" ) ;

			// Now loop through rows in the region table...
			Console.WriteLine ( "Data selected via a stored procedure" ) ;

			foreach ( DataRow aRow in ds.Tables["Region"].Rows ) 
			{
				Console.WriteLine ( "  {0,-3} {1}" , aRow[0] , aRow[1] ) ;
			}

			conn.Close ( ) ;
		}
	}

	/// <summary>
	/// Create a command that will select all region records
	/// </summary>
	/// <param name="conn">The database connection</param>
	/// <returns>A SqlCommand</returns>
	private static SqlCommand GenerateSelectCommand ( SqlConnection conn )
	{
		SqlCommand  aCommand = new SqlCommand ( "RegionSelect" , conn ) ;

		aCommand.CommandType = CommandType.StoredProcedure ;
		aCommand.UpdatedRowSource = UpdateRowSource.None ;

		return aCommand ;
	}

}