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20151224:Web:CheckBoxList 控件:去重显示 ;复选框多选时可点击查询查出结果

时间:2015-12-26 23:35:00      阅读:940      评论:0      收藏:0      [点我收藏+]

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aspx代码:

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

<!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>
    
        <br />
        <br />
        <asp:Label ID="Label1" runat="server" Text="区域:"></asp:Label>
        <asp:CheckBox ID="CheckBox1" runat="server" AutoPostBack="True" OnCheckedChanged="CheckBox1_CheckedChanged" Text="全选" />
        <br />
        <asp:CheckBoxList ID="CheckBoxList1" runat="server" RepeatDirection="Horizontal">
        </asp:CheckBoxList>
        <br />
        <asp:Label ID="Label2" runat="server" Text="租赁类型:"></asp:Label>
        <asp:CheckBox ID="CheckBox2" runat="server" AutoPostBack="True" OnCheckedChanged="CheckBox2_CheckedChanged" Text="全选" />
        <br />
        <asp:CheckBoxList ID="CheckBoxList2" runat="server" RepeatDirection="Horizontal">
        </asp:CheckBoxList>
        <br />
        <asp:Label ID="Label3" runat="server" Text="房屋类型:"></asp:Label>
        <asp:CheckBox ID="CheckBox3" runat="server" AutoPostBack="True" OnCheckedChanged="CheckBox3_CheckedChanged" Text="全选" />
        <br />
        <asp:CheckBoxList ID="CheckBoxList3" runat="server" 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="Button2" runat="server" OnClick="Button2_Click" Text="搜索" />
        <br />
    
        <asp:Repeater ID="Repeater1" runat="server">
            <HeaderTemplate>
                <table width="840" border="0" cellspacing="1" cellpadding="1" bgcolor="#6600FF">
                  <tr>
                    <td width="120" height="30" align="center" valign="middle" bgcolor="#FFFFFF"></td>
                    <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="120" align="center" valign="middle" bgcolor="#FFFFFF">租金</td>
                    <td width="120" 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>
            <ItemTemplate>
                <tr>
                    <td width="120" align="center" valign="middle" bgcolor="#FFFFFF"><a href="Update.aspx?id=<%#Eval("id") %>">编辑</a>&nbsp;<a href="Delete.aspx?id=<%#Eval("id") %>">删除</a></td>
                    <td width="120" height="30" 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="120" align="center" valign="middle" bgcolor="#FFFFFF" ><%#Eval("Rent") %></td>
                    <td width="120" align="center" valign="middle" bgcolor="#FFFFFF"><%#Eval("RentType") %></td>
                    <td width="120" align="center" valign="middle" bgcolor="#FFFFFF"><%#Eval("HouseType") %></td>
                   </tr>
            </ItemTemplate>
            <FooterTemplate>
                </table>
            </FooterTemplate>
        </asp:Repeater>
    
    </div>
        <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="添加数据" />
    </form>
</body>
</html>

 

cs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 Main : System.Web.UI.Page
{
    private HouseDataContext context = new HouseDataContext();
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            Repeater1.DataSource = context.House;
            Repeater1.DataBind();
          
            //  去重显示 方式一:
            var query = context.House;
            //通过操作集合去重显示
            foreach (House data in query)
            {
                ListItem item = new ListItem();//造项
                item.Text = data.Area;
                if (!CheckBoxList1.Items.Contains(item))
                {
                    CheckBoxList1.Items.Add(item);
                }
            }
            foreach (House data in query)
            {
                ListItem item = new ListItem();//造项
                item.Text = data.RentType;
                if (!CheckBoxList2.Items.Contains(item))
                {
                    CheckBoxList2.Items.Add(item);
                }
            }
            foreach (House data in query)
            {
                ListItem item = new ListItem();//造项
                item.Text = data.HouseType;
                if (!CheckBoxList3.Items.Contains(item))
                {
                    CheckBoxList3.Items.Add(item);
                }
            }
            //去重显示 方式二:
            //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 Button1_Click(object sender, EventArgs e)
    {
        Response.Redirect("Insert.aspx");
    }
    protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
    {
        foreach (ListItem item in CheckBoxList1.Items)
        {
            item.Selected = CheckBox1.Checked;
        }
    }
    protected void CheckBox2_CheckedChanged(object sender, EventArgs e)
    {
        foreach (ListItem item in CheckBoxList2.Items)
        {
            item.Selected = CheckBox2.Checked;
        }
    }
    protected void CheckBox3_CheckedChanged(object sender, EventArgs e)
    {
        foreach (ListItem item in CheckBoxList3.Items)
        {
            item.Selected = CheckBox3.Checked;
        }
    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        List<House> list = context.House.ToList();//造集合存放所有的数据
        ArrayList listArea = new ArrayList();//造集合
        ArrayList listRentType = new ArrayList();
        ArrayList listHouseType = new ArrayList();
        
        //第一个查询条件区域Area
        if (CheckBoxList1.SelectedIndex >= 0 && !CheckBox1.Checked)//有选中项并且不全选
        {
            foreach (ListItem item in CheckBoxList1.Items)//取出里面的选中值
            {
                if (item.Selected)
                { //如果被选中 取出里面的值 并赋给集合
                    listArea.Add (item.Text);
                }
            }
            list = list.Where(p => listArea.Contains(p.Area)).ToList();//listArea是区域集合 包含这条数据Area的区域
        }
        //取第二个查询条件租赁类型RentType
        if (CheckBoxList2.SelectedIndex >= 0 && !CheckBox2.Checked)
        {
            foreach (ListItem item in CheckBoxList2.Items)
            {
                if (item.Selected)
                {
                    listRentType.Add(item.Text);
                }
            }
            list = list.Where(p => listRentType.Contains(p.RentType)).ToList();
        }
        //取第三个查询条件房屋类型HouseType
        if (CheckBoxList3.SelectedIndex >= 0 && !CheckBox3.Checked)
        {
            foreach (ListItem item in CheckBoxList3.Items)
            {
                if (item.Selected)
                {
                    listHouseType.Add(item.Text);
                }
            }
            list = list.Where(p => listHouseType.Contains(p.HouseType)).ToList();
        }
        //取第四个查询条件关键字KeyWord
        string keyword = TextBox1.Text;
        if(keyword != "")
        {
            list = list.Where(p => p.KeyWord.Contains(keyword)).ToList();
        }
        
        Repeater1.DataSource = list;
        Repeater1.DataBind();
    }
}

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20151224:Web:CheckBoxList 控件:去重显示 ;复选框多选时可点击查询查出结果

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原文地址:http://www.cnblogs.com/mn-b/p/5079209.html

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