WB 练习 CheckBoxList 控件 去重显示 点击查询
前台HTML代码：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="SouSuo.aspx.cs" Inherits="SouSuo" %>
<!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>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="Label1" runat="server" Text="区域："></asp:Label>
<asp:CheckBox ID="ckQuAll" runat="server" Text="全选" AutoPostBack="True" OnCheckedChanged="CheckBox1_CheckedChanged" />
<br />
<asp:CheckBoxList ID="CheckBoxList1" runat="server" OnSelectedIndexChanged="CheckBoxList1_SelectedIndexChanged" RepeatDirection="Horizontal">
</asp:CheckBoxList>
<br />
<br />
<asp:Label ID="Label2" runat="server" Text="租赁类型："></asp:Label>
<asp:CheckBox ID="ckZuAll" runat="server" Text="全选" AutoPostBack="True" OnCheckedChanged="CheckBox2_CheckedChanged" />
<br />
<asp:CheckBoxList ID="CheckBoxList2" runat="server" OnSelectedIndexChanged="CheckBoxList1_SelectedIndexChanged" OnCallingDataMethods="CheckBoxList2_CallingDataMethods" RepeatDirection="Horizontal">
</asp:CheckBoxList>
<br />
<br />
<asp:Label ID="Label3" runat="server" Text="房屋类型："></asp:Label>
<asp:CheckBox ID="ckFangAll" runat="server" Text="全选" AutoPostBack="True" OnCheckedChanged="CheckBox3_CheckedChanged" />
<br />
<asp:CheckBoxList ID="CheckBoxList3" runat="server" OnSelectedIndexChanged="CheckBoxList1_SelectedIndexChanged" RepeatDirection="Horizontal">
</asp:CheckBoxList>
<br />
<asp:Label ID="Label4" runat="server" Text="关键字:"></asp:Label>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<br />
<br />
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" style="height: 21px" Text="搜索" />
<br />
<br />
<br />
<asp:Repeater ID="Repeater1" runat="server">
<HeaderTemplate>
<table width="1000" border="0" cellspacing="1" cellpadding="1" bgcolor="#6600FF">
<tr>
<td width="120" align="center" valign="middle" bgcolor="#FFFFFF">关键字</td>
<td width="120" align="center" valign="middle" bgcolor="#FFFFFF">区域</td>
<td width="120" align="center" valign="middle" bgcolor="#FFFFFF">使用面积</td>
<td width="100" align="center" valign="middle" bgcolor="#FFFFFF">租金</td>
<td width="100" align="center" valign="middle" bgcolor="#FFFFFF">租赁类型</td>
<td width="120" align="center" valign="middle" bgcolor="#FFFFFF">房屋类型</td>
</tr>
</HeaderTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
<ItemTemplate>
<tr>
<td width="120" align="center" valign="middle" bgcolor="#FFFFFF"><%#Eval("KeyWord") %></td>
<td width="120" align="center" valign="middle" bgcolor="#FFFFFF"><%#Eval("Area") %></td>
<td width="120" align="center" valign="middle" bgcolor="#FFFFFF"><%#Eval("SquareMeter") %></td>
<td width="100" align="center" valign="middle" bgcolor="#FFFFFF"><%#Eval("Rent") %></td>
<td width="100" align="center" valign="middle" bgcolor="#FFFFFF"><%#Eval("RentType") %></td>
<td width="120" align="center" valign="middle" bgcolor="#FFFFFF"><%#Eval("HouseType") %></td>
</tr>
</ItemTemplate>
</asp:Repeater>
</div>
</form>
</body>
</html>
后台C#代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Collections;
public partial class SouSuo : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
TestDataContext context = new TestDataContext();
Repeater1.DataSource = context.House;
Repeater1.DataBind();
//去重显示 方法一
//查出这个表 放在一个集合里面
//var query = context.House;
//foreach (House data in query)
//{
// ListItem item = new ListItem();
// item.Text = data.Area;
// //去重显示 判断早的像是不是已经存在
// if (!CheckBoxList1.Items.Contains(item))
// {
// //添加
// CheckBoxList1.Items.Add(item);
// }
//}
//去重显示方法二：
//Select选取这条数据 进行去重 放到一个集合里面
List<string> list = context.House.Select(p => p.Area).Distinct().ToList();
foreach (string text in list)
{
ListItem item = new ListItem();
item.Text = text;
CheckBoxList1.Items.Add(item);
}
List<string> listR = context.House.Select(p => p.RentType).Distinct().ToList();
foreach (string text in listR)
{
ListItem item = new ListItem();
item.Text = text;
CheckBoxList2.Items.Add(item);
}
List<string> listH = context.House.Select(p => p.HouseType).Distinct().ToList();
foreach (string text in listH)
{
ListItem item = new ListItem();
item.Text = text;
CheckBoxList3.Items.Add(item);
}
}
}
protected void CheckBoxList1_SelectedIndexChanged(object sender, EventArgs e)
{
}
protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
{
foreach (ListItem item in CheckBoxList1.Items)
{
item.Selected = ckQuAll.Checked;
}
}
protected void CheckBoxList2_CallingDataMethods(object sender, CallingDataMethodsEventArgs e)
{
}
protected void CheckBox2_CheckedChanged(object sender, EventArgs e)
{
foreach (ListItem item in CheckBoxList2.Items)
{
item.Selected = ckZuAll.Checked;
}
}
protected void CheckBox3_CheckedChanged(object sender, EventArgs e)
{
foreach (ListItem item in CheckBoxList3.Items)
{
item.Selected = ckFangAll.Checked;
}
}
protected void Button1_Click(object sender, EventArgs e)
{
TestDataContext context = new TestDataContext();
List<House> list = context.House.ToList();
//造集合
ArrayList listArea = new ArrayList();
ArrayList listZu = new ArrayList();
ArrayList listHouse = new ArrayList();
//区域筛选
//有选中项 并且不全选
if (CheckBoxList1.SelectedIndex >= 0 && !ckQuAll.Checked)
{
//取出里面的选中值
foreach (ListItem item in CheckBoxList1.Items)
{
//如果被选中 取出里面的值 给到一个集合
if (item.Selected)
{
listArea.Add(item.Text);
}
}
//listArea是区域集合 包含这条数据Area的区域
list = list.Where(p => listArea.Contains(p.Area)).ToList();
}
//租赁类型筛选
//有选中项 并且不全选
if (CheckBoxList2.SelectedIndex >= 0 && !ckZuAll.Checked)
{
//取出里面的选中值
foreach (ListItem item in CheckBoxList2.Items)
{
//如果被选中 取出里面的值 给到一个集合
if (item.Selected)
{
listZu.Add(item.Text);
}
}
//listArea是区域集合 包含这条数据Area的区域
list = list.Where(p => listZu.Contains(p.RentType)).ToList();
}
//房屋类型筛选
//有选中项 并且不全选
if (CheckBoxList3.SelectedIndex >= 0 && !ckFangAll.Checked)
{
//取出里面的选中值
foreach (ListItem item in CheckBoxList3.Items)
{
//如果被选中 取出里面的值 给到一个集合
if (item.Selected)
{
listHouse.Add(item.Text);
}
}
//listArea是区域集合 包含这条数据Area的区域
list = list.Where(p => listHouse.Contains(p.HouseType)).ToList();
}
//关键字筛选
string KeyWord = TextBox1.Text;
if (KeyWord != "")
{
list = list.Where(p => p.KeyWord.Contains(KeyWord)).ToList();
}
Repeater1.DataSource = list;
Repeater1.DataBind();
}
}
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