dt_data/ECDeveloper/Template/Code/WebBase/TextBoxEx.cs

using System;
using System.Drawing;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ComponentModel;

namespace Sp.Web.UI
{
	[DefaultProperty( "BackColorOn" ),
	ToolboxData( "<{0}:TextboxEx runat=\"server\" SkinID=\"TextBoxEx\"></{0}:TextboxEx>" )]
	public class TextboxEx : System.Web.UI.WebControls.TextBox 
	{
		private Color _colOff = Color.White;
		[Category( "Appearance" ), Description( "The background color when the control loses focus" )]
		public Color BackColorOff
		{
			get{return _colOff;	}
			set{_colOff = value;}
		}
		
		private Color _colOn =  Color.WhiteSmoke;
		[Category( "Appearance" ),	Description( "The background color when the control has the focus" )]
		public Color BackColorOn
		{
			get{return _colOn;	}
			set{_colOn = value;}
		}
	
		protected override void AddAttributesToRender( HtmlTextWriter writer )
		{
			base.AddAttributesToRender(writer); 
			if( inDesignMode() || System.Web.HttpContext.Current.Request.Browser.Type.IndexOf( "IE" ) > -1 ) 
			{
				writer.AddAttribute( "onFocus", "JavaScript:this.style.backgroundColor='" + ColorTranslator.ToHtml( _colOn ) + "';" );
				if( _colOff.Equals( Color.Empty ) )
				{
					_colOff = this.BackColor;
				}
				writer.AddAttribute( "onBlur", "JavaScript:this.style.backgroundColor='" + ColorTranslator.ToHtml( _colOff ) + "';" );
			}
		}

		private bool inDesignMode()
		{
			bool blnOut = false;
			if( object.ReferenceEquals( System.Web.HttpContext.Current, null ) ) 
			{
				blnOut = true;
			} 
			else
			{
				blnOut = false;
			}
			return blnOut;
		}

	}
}