【C#】【平时练习】将左边列表框(List)的内容（月份）添加到右边列表框。最终右侧显示的内容（月份）要保持一定顺序
Aspx - 点击查看代码
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm_Demo01.aspx.cs" Inherits="WebApplication_ListBox.WebForm_Demo01" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
<style>
body {
margin:0;
padding:0;
border:0;
outline:none;
}
.faraway {
margin:10px;
padding:5px;
}
</style>
<link href="css/xrilang-locationLayout.css" rel="stylesheet" />
</head>
<body>
<form id="form1" runat="server" class="center-al">
<div class="div-block-online">
<div class="div-block-online border-r border-BlueBlackish">
<asp:ListBox ID="lbMonth1" runat="server" Height="200px" Width="100px" SelectionMode="Multiple">
<asp:ListItem Value="1">January</asp:ListItem>
<asp:ListItem Value="2">February</asp:ListItem>
<asp:ListItem Value="3">March</asp:ListItem>
<asp:ListItem Value="4">April</asp:ListItem>
<asp:ListItem Value="5">May</asp:ListItem>
<asp:ListItem Value="6">June</asp:ListItem>
<asp:ListItem Value="7">July</asp:ListItem>
<asp:ListItem Value="8">August</asp:ListItem>
<asp:ListItem Value="9">September</asp:ListItem>
<asp:ListItem Value="10">October</asp:ListItem>
<asp:ListItem Value="11">November</asp:ListItem>
<asp:ListItem Value="12">December</asp:ListItem>
</asp:ListBox>
</div>
<div class="div-block-online" style="height:200px">
<div class="faraway">
<asp:Button ID="Button1" runat="server" Text=">>>" OnClick="Button1_Click" class="border-Orange"/>
</div>
<br />
<div class="faraway">
<asp:Button ID="Button2" runat="server" Text="<<<" OnClick="Button2_Click" class="border-Orange" />
</div>
</div>
<div class="div-block-online border-r border-BlueBlackish">
<asp:ListBox ID="lbMonth2" runat="server" Height="200px" SelectionMode="Multiple" style="margin-top: 0px" Width="100px">
</asp:ListBox>
</div>
</div>
<p>
<asp:Button ID="btTest" runat="server" Text="查询" OnClick="btTest_Click" class="border-Orange"/>
</p>
<div class="div-block border-GreenBlackish">
<asp:Label ID="lblShow1" runat="server" Text=""></asp:Label>
</div>
<div class="div-block border-GreenBlackish">
<asp:Label ID="lblShow2" runat="server" Text="" ></asp:Label>
</div>
</form>
</body>
</html>
cs - 点击查看代码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebApplication_ListBox
{
public partial class WebForm_Demo01 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
//@萌狼蓝天-Test05
}
protected void Button1_Click(object sender, EventArgs e)
{
//下面的是老师的方法
if (lbMonth1.SelectedIndex > -1)
{
//把左侧选中项添加到右侧
//lbMonth2.Items.Add(lbMonth1.SelectedItem);
//lbMonth2.Items.Insert(0,lbMonth1.SelectedItem);
//2.1
//检查右侧所有项，确保插入项的Value按顺序位 int correctIndex
//2.2 在正确位置插入
//将排序计算划为单独的方法直接使用，后续直接优化方法算法即可。
lbMonth2.Items.Insert(OneToTwo(), lbMonth1.SelectedItem);
//3.在左侧列表框中删除选中项
lbMonth1.Items.RemoveAt(lbMonth1.SelectedIndex);
}else {
lblShow1.Text = "INDEX NOT > 0";
}
}
protected void Button2_Click(object sender, EventArgs e)
{
if (lbMonth2.SelectedIndex > -1)
{
lbMonth1.Items.Insert(TwoToOne(), lbMonth2.SelectedItem);
lbMonth2.Items.RemoveAt(lbMonth2.SelectedIndex);
}
else
{
lblShow1.Text = "INDEX NOT > 0";
}
}
/*
* 左边往右边添加
*/
protected int OneToTwo() {
int correctIndex = 0;
int valued = Int32.Parse(lbMonth1.SelectedItem.Value);
if (lbMonth2.Items.Count == 0){
return 0;
};
if (lbMonth2.Items.Count - 1 == 0) {
if (valued > textToValue(lbMonth2.Items[lbMonth2.Items.Count - 1].Value))
{
return lbMonth2.Items.Count;
}
else
{
return 0;
}
}
for (int i = 0; i < lbMonth2.Items.Count - 1; i++)
{
int valuei = textToValue(lbMonth2.Items[i].Value);
int valueii = textToValue(lbMonth2.Items[i + 1].Value);
//不大不小
if (valued > valuei & valued < valueii && valueii!=0)
{
correctIndex = i + 1;
lblShow1.Text = ("[" + i + "]C2(不大不小)：" + valuei + "<[" + valued + "]<" + valueii);
break;
}
//最大，新增
else if (valued > textToValue(lbMonth2.Items[lbMonth2.Items.Count - 1].Value))
{
lblShow1.Text = ("[" + i + "]C2(最大新增)：" + textToValue(lbMonth2.Items[lbMonth2.Items.Count - 1].Value) + "<[" + valued + "]");
correctIndex = lbMonth2.Items.Count;
break;
}
//最小,插入
else if (valued < textToValue(lbMonth2.Items[0].Value))
{
lblShow1.Text = ("[" + i + "]C2(最小新增)：" + valued + "<" + textToValue(lbMonth2.Items[0].Value));
correctIndex = 0;
break;
}
else {
lblShow1.Text = "valued:"+valued+" | "+ lbMonth2.Items[lbMonth2.Items.Count - 1].Value;
}
}
return correctIndex;
}
protected int TwoToOne()
{
int correctIndex = 0;
int valued = Int32.Parse(lbMonth2.SelectedItem.Value);
if (lbMonth1.Items.Count == 0)
{
return 0;
};
if (lbMonth1.Items.Count - 1 == 0)
{
if (valued > textToValue(lbMonth1.Items[lbMonth1.Items.Count - 1].Value))
{
return lbMonth1.Items.Count;
}
else
{
return 0;
}
}
for (int i = 0; i < lbMonth1.Items.Count - 1; i++)
{
int valuei = textToValue(lbMonth1.Items[i].Value);
int valueii = textToValue(lbMonth1.Items[i + 1].Value);
//不大不小
if (valued > valuei & valued < valueii)
{
correctIndex = i + 1;
lblShow1.Text = ("[" + i + "]C2(不大不小)：" + valuei + "<[" + valued + "]<" + valueii);
break;
}
//最大，新增
else if (valued > textToValue(lbMonth1.Items[lbMonth1.Items.Count - 1].Value))
{
lblShow1.Text = ("[" + i + "]C2(最大新增)：" + textToValue(lbMonth1.Items[lbMonth1.Items.Count - 1].Value) + "<" + valued);
correctIndex = lbMonth1.Items.Count;
break;
}
//最小,插入
else if (valued < textToValue(lbMonth1.Items[0].Value))
{
lblShow1.Text = ("[" + i + "]C2(最小新增)：" + valued + "<" + textToValue(lbMonth1.Items[0].Value));
correctIndex = 0;
break;
}
}
return correctIndex;
}
/**
* 将月份转为数值，方便进行比对排序
*/
protected int textToValue(String item)
{
lblShow2.Text = "方法被调用：" + item;
if (item == "1")
{
return 1;
}
else if (item == "2")
{
return 2;
}
else if (item == "3")
{
return 3;
}
else if (item == "4")
{
return 4;
}
else if (item == "5")
{
return 5;
}
else if (item == "6")
{
return 6;
}
else if (item == "7")
{
return 7;
}
else if (item == "8")
{
return 8;
}
else if (item == "9")
{
return 9;
}
else if (item == "10")
{
return 10;
}
else if (item == "11")
{
return 11;
}
else if (item == "12")
{
return 12;
}
return 0;
}
/**
* 测试专用
*/
protected void btTest_Click(object sender, EventArgs e)
{
lblShow1.Text = "[box1]" + "<br>" +
"[当前选择索引]:" + lbMonth1.SelectedIndex + "<br>" +
"[当前选择Value]:" + lbMonth1.SelectedValue + "<br>" +
"[当前选择item]" + lbMonth1.SelectedItem + "<br>" +
"[当前选择Mode]:" + lbMonth1.SelectionMode + "<br>"+
"[Count]:" + lbMonth1.Items.Count + "<br>";
lblShow2.Text = "[box2]" + "<br>" +
"[当前选择索引]:" + lbMonth2.SelectedIndex + "<br>" +
"[当前选择Value]:" + lbMonth2.SelectedValue + "<br>" +
"[当前选择item]" + lbMonth2.SelectedItem + "<br>" +
"[当前选择Mode]:" + lbMonth2.SelectionMode + "<br>"+
"[Count]:" + lbMonth2.Items.Count + "<br>";
}
}
}
版 权 声 明
作者：萌狼蓝天
QQ：3447902411（仅限技术交流，添加请说明方向)
转载请注明原文链接：https://www.cnblogs.com/mllt/p/Cshap_edu_practice_0001.html
