executescalar.aspx.cs

Microsoft?ASP.NET Programming with Microsoft Visual C#?.NET Version 2003 Step By Step

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Data.OleDb;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace Chapter_09
{
	/// <summary>
	/// Summary description for ExecuteScalar.
	/// </summary>
	public class ExecuteScalar : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Label Value;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			string DbPath  = Server.MapPath("Northwind.mdb");
			string ConnStr;
			string SQL;
			ConnStr = "Provider=Microsoft.Jet.OLEDB.4.0;" +
				@"Data Source=" + DbPath +";";
			OleDbConnection MyOleDbConn = new OleDbConnection(ConnStr);
			MyOleDbConn.Open();
			try
			{
				SQL = "SELECT Count(*) FROM products";
				OleDbCommand MyOleDbCommand = new OleDbCommand(SQL,MyOleDbConn);
				object Result;
				Result = MyOleDbCommand.ExecuteScalar();
				Value.Text = "There are " + Result.ToString() +
					" products in the Northwind database.";
			}
			finally
			{
				MyOleDbConn.Close();
			}
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: This call is required by the ASP.NET Web Form Designer.
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{    
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion
	}
}