C#多选列表框控件类源代码

/************************************************************************************
*      File:                  *
*    MultiListBox.cs                                               *
*      Description:                *
*     Multi-ListBox控件                    *
***********************************************************************************/
using System;
using System.Collections;
using System.Collections.Generic;
using System.Reflection;
using System.Text;
using System.Collections.Specialized;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.ComponentModel;
using System.Globalization;

[assembly: WebResource("FrameWork.WebControls.Resource.moveAllLeft.gif", "image/gif")]
[assembly: WebResource("FrameWork.WebControls.Resource.moveAllLeft2.gif", "image/gif")]
[assembly: WebResource("FrameWork.WebControls.Resource.moveAllRight.gif", "image/gif")]
[assembly: WebResource("FrameWork.WebControls.Resource.moveAllRight2.gif", "image/gif")]
[assembly: WebResource("FrameWork.WebControls.Resource.moveLeft.gif", "image/gif")]
[assembly: WebResource("FrameWork.WebControls.Resource.moveLeft2.gif", "image/gif")]
[assembly: WebResource("FrameWork.WebControls.Resource.moveRight.gif", "image/gif")]
[assembly: WebResource("FrameWork.WebControls.Resource.moveRight2.gif", "image/gif")]
[assembly: WebResource("FrameWork.WebControls.Resource.sortDown.gif", "image/gif")]
[assembly: WebResource("FrameWork.WebControls.Resource.sortDown2.gif", "image/gif")]
[assembly: WebResource("FrameWork.WebControls.Resource.sortUp.gif", "image/gif")]
[assembly: WebResource("FrameWork.WebControls.Resource.sortUp2.gif", "image/gif")]
[assembly: WebResource("FrameWork.WebControls.Resource.MultiListBox.js", "text/javascript")]

namespace FrameWork.WebControls
{
    /// <summary>
    /// Multi-ListBox控件
    /// </summary>
    [ToolboxData("<{0}:MultiListBox runat=\"server\"></{0}:MultiListBox")]
    [
    ParseChildren(true),
    PersistChildren(false),
    ]
    public class MultiListBox : CompositeControl, IPostBackDataHandler
    {
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