webform1.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.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace Chapter_03
{
	/// <summary>
	/// Summary description for WebForm1.
	/// </summary>
	public class WebForm1 : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Label Label1;
		protected System.Web.UI.WebControls.DropDownList Color;
		protected System.Web.UI.WebControls.Label Message;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			// Put user code to initialize the page here
		}

		#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.Color.SelectedIndexChanged += new System.EventHandler(this.Color_SelectedIndexChanged);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void Color_SelectedIndexChanged(object sender, System.EventArgs e)
		{
			// Initialize label.
			Message.Text="";
			switch(Color.SelectedItem.Text)
			{
				case "Red":
					Message.Text+="<font color='" + Color.SelectedItem.Text + "'>";
					Message.Text+="You chose Red";
					Message.Text+="<font>";
					break;
				case "Green":
					Message.Text+="<font color='" + Color.SelectedItem.Text + "'>";
					Message.Text+="You chose Green";
					Message.Text+="<font>";
					break;
				case "Blue":
					Message.Text+="<font color='" + Color.SelectedItem.Text + "'>";
					Message.Text+="You chose Blue";
					Message.Text+="<font>";
					break;
				default:
					Message.Text+="<font color=\"black\">";
					Message.Text+="You did not chose a color";
					Message.Text+="<font>";
					break;
			}
		}
	}
}