listbox多选实现上下移动 js版和服务器版

2016/12/29 15:31
阅读数 25
<%@ 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;
    }
}

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