listbox多选实现上下移动 js版和服务器版

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="X200906021128.aspx.cs" Inherits="ListBoxs_X200906021128" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

    <title></title>

    <script type="text/javascript">

        function MoveUP(fElement)

        {

            if (fElement.options.length == 0 || fElement.options[0].selected) return;

            for (var i = 1; i < fElement.options.length; i++)

            {

                if (fElement.options[i].selected)

                {

                    var text = fElement.options[i].text;

                    var value = fElement.options[i].value;

                    var selected = fElement.options[i].selected;

                    fElement.options[i].text = fElement.options[i - 1].text;

                    fElement.options[i].value = fElement.options[i - 1].value;

                    fElement.options[i].selected = fElement.options[i - 1].selected;

                    fElement.options[i - 1].text = text;

                    fElement.options[i - 1].value = value;

                    fElement.options[i - 1].selected = selected;

                }

            }

        }

        function MoveDown(fElement)

        {

            if (fElement.options.length == 0 || fElement.options[fElement.options.length - 1].Selected) return;

            for (var i = fElement.options.length - 1; i > -1; i--)

            {

                if (fElement.options[i].selected)

                {

                    var text = fElement.options[i + 1].text;

                    var value = fElement.options[i + 1].value;

                    var selected = fElement.options[i + 1].selected;

                    fElement.options[i + 1].text = fElement.options[i].text;

                    fElement.options[i + 1].value = fElement.options[i].value;

                    fElement.options[i + 1].selected = fElement.options[i].selected;

                    fElement.options[i].text = text;

                    fElement.options[i].value = value;

                    fElement.options[i].selected = selected;

                }

            }

        }

    </script>

</head>

<body>

    <form id="form1" runat="server">

    <div>

        <asp:ListBox ID="fListBox" runat="server" Height="200px" SelectionMode="Multiple" Width="200px"></asp:ListBox>

        <br />

        <br />

        --- Server Side ------------------------------------------------------

        <br />

        <br />

        <asp:Button ID="btnUp" runat="server" onclick="btnUp_Click" Text="Up" />

        <asp:Button ID="btnDown" runat="server" onclick="btnDown_Click" Text="Down" />

        <br />

        <br />

        --- Client Side ------------------------------------------------------

        <br />

        <br />

        <input type="button" value="UP" onclick="MoveUP(document.getElementById('fListBox'));" />

        <input type="button" value="Down" onclick="MoveDown(document.getElementById('fListBox'));" />

        <br />

         用 Ctrl + 鼠标 或 Ctrl + Shift 鼠标，实现多选或间断多选

    </div>

    </form>

</body>

</html>

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

public partial class ListBoxs_X200906021128 : System.Web.UI.Page

{

    protected void Page_Load(object sender, EventArgs e)

    {

        if (!IsPostBack)

        {

            for (int i = 0; i < 20; i++)

                fListBox.Items.Add(i.ToString());

        }

    }

    protected void btnUp_Click(object sender, EventArgs e)

    {

        // 没有项，或第一个选中节点已经是第一项，则不处理

        if (this.fListBox.Items.Count == 0 || this.fListBox.Items[0].Selected) return;

        for (int i = 1; i < this.fListBox.Items.Count; i++)

        {

            if (this.fListBox.Items[i].Selected)

                this.ChangeProperty(this.fListBox.Items[i - 1], this.fListBox.Items[i]);

        }

    }

    protected void btnDown_Click(object sender, EventArgs e)

    {

        // 没有项，或最后一个选中节点已经是第一项，则不处理

        if (this.fListBox.Items.Count == 0 || this.fListBox.Items[this.fListBox.Items.Count - 1].Selected) return;

        for (int i = this.fListBox.Items.Count-1; i >-1 ; i--)

        {

            if (this.fListBox.Items[i].Selected)

                this.ChangeProperty(this.fListBox.Items[i], this.fListBox.Items[i+1]);

        }

    }

    private void ChangeProperty(ListItem fFront, ListItem fCurrent)

    {

        string fText = fFront.Text;

        string fValue = fFront.Value;

        bool fSelected = fFront.Selected;

        fFront.Text = fCurrent.Text;

        fFront.Value = fCurrent.Value;

        fFront.Selected = fCurrent.Selected;

        fCurrent.Text = fText;

        fCurrent.Value = fValue;

        fCurrent.Selected = fSelected;

    }

}