asp.net µÄComboBox ¿ÉÊäÈë¿ÉÑ¡ÔñÏÂÀÁбí
ÎÄÕ³ö´¦£ºhttp://www.cnblogs.com/ejiyuan/archive/2007/11/09/954325.html
using System;
using System.ComponentModel;
using System.Web;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Collections;
using System.Web.UI.Design;
[assembly: TagPrefix("AtomNet.Web.UI.WebControls", "AtomNet")]
namespace AtomNet.Web.UI.WebControls
{
/// <summary>
/// Represents a control that allows the user to select a single item from a drop-down list,
/// or type in a new value that is not in the list.
/// </summary>
/// <remarks>
/// Since the ComboBox control inherits from <see cref="System.Web.UI.WebControls.ListBox"/>,
/// you can use it in exactly the same manner (including DataBinding).
/// For older browsers that do not support the functionality required to render this control,
/// a normal dropdown box will be emitted instead.
/// </remarks>
[ToolboxData("<{0}:ComboBox runat=\"server\"></{0}:ComboBox>")]
[ValidationPropertyAttribute("SelectedValue")]
[Designer(typeof(AtomNet.Web.UI.WebControls.ComboBoxDesigner))]
public class ComboBox : System.Web.UI.WebControls.ListBox
{
#region ˽ÓÐÊôÐÔ
/// <summary>
/// The <see cref="System.Web.UI.WebControls.TextBox"/> used internally to allow the user
/// to type in new values.
/// </summary>
TextBox textBox = new TextBox();
Ïà¹ØÎĵµ£º
²»Öª²»¾õ¹¤×÷ÒѾÁ½Äê¶àÁË£¬Ò»Ö±Ïë°Ñ¹ýÈ¥µÄµãµãµÎµÎ»ýÀ۵ľÑéдÏÂÀ´£¬µ«ÊÇÒ»Ö±ÄÑÒÔÍê³É£¬Ò»ÊÇʱ¼äµÄÏÞÖÆ£¬ÔÙÊÇËùÒԵö«Î÷»¹ÊDZȽÏÔÓÂÒ£¬Ò»Ê±ÄÑÒÔÕûÀí¡£ÏÂÃæ¾Í´ÓASP.NETÓ¦ÓóÌÐòÉú´æÖÜÆÚ¿ªÊ¼Ì¸Æð£¬Ö÷ÒªÊÇÒÔ´ËΪһ¸ö¿ªÍ·£¬ÀϲûÊö¸öÈ˵ÄһЩ¾Ñé¾Ñé̸֮ºÍ¶Ô²Î¿¼Ò»Ð©×ÊÁϵÄÀí½â¡£
Ê×ÏÈ£¬ÎÊÌâÒ»£ºÎÒÃÇ´ò¿ªÒ»¸öÍ ......
asp.netÊä³ö png 32λ ͼÏñ£¬´øÍ¸Ã÷alpha¡£
// pngtest.htm
<html>
<head></head>
<body bgColor="gray">
<img src="png.ashx" />
</body>
</html>
// png.ashx
<%@ WebHandler Language="C#" Class="Png" %>
using System.Web;
public class Png : IHtt ......
ÑéÖ¤¿ÉÒÔÈ·±£Óû§ÊäÈë·ûºÏÄúÖ¸¶¨µÄÌõ¼þ¡£ÔÚ´ó¶àÊýÇé¿öÏ£¬ÕâÒ»²Ù×÷±È½Ï¼òµ¥¡£µ«ÓÐʱ¶ÔÊäÈë½øÐÐÑéÖ¤»áÒýÈëÌØÊâµÄÌõ¼þ¡£Á˽âÕâЩÌõ¼þÊÇʲô¡¢ÑéÖ¤ÈçºÎÖ´ÐÐÒÔ¼°ÓÐÄÄЩ¿ÉÄܵÄÑéÖ¤½á¹ûÊǷdz£ÖØÒªµÄ¡£
Ò»¡¢Óë¿Õ°××ֶεĶԱÈ
Èç¹û×Ö¶ÎΪ¿Õ°×£¬Ôò³ý RequiredFieldValidator ¿Ø¼þÖ®ÍâµÄ ......