WebForm控件Repeater

时间：2022-08-04 20:37:25

我们会发现用拼接字符串来显示一个查询非常的麻烦,有一个控件Repeater帮助你,省去写Foreach

LinQ to SQL类WebForm控件Repeater

函数类:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

/// <summary>

/// fruitDA 的摘要说明

/// </summary>

public class fruitDA

{

    private DataClasses2DataContext context;

    public fruitDA()

    {

        context = new DataClasses2DataContext();

    }

    public List<fruit> select()

    {

        return context.fruit.ToList();

    }

    public string FriutName(int a)

    {

        var query = context.fruit.Where(p=>p.ids==a);

        if (query.Count() > )

        {

            return query.First().name;

        }

        return null;

    }

    public decimal FruitPrice(int a)

    {

    var query = context.fruit.Where(p=>p.ids==a);

    if (query.Count() > )

    {

        return Convert.ToDecimal( query.First().price);

    }

    return ;

    }

}

新建一页面,BODY中DIV加入Literal标签 后台写函数

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>

<!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 align="center">

       <asp:Literal ID="Literal1" runat="server"></asp:Literal>

     <asp:Repeater ID="Repeater1" runat="server">

            <HeaderTemplate>

                <table><tr><td style="color:greenyellow">果果</td>

                    <td style="color:greenyellow">价格</td>

                    <td style="color:greenyellow">哪里滴</td>

                    <td style="color:greenyellow">库存</td></tr>

                    </HeaderTemplate>

                <ItemTemplate>

                <tr bgcolor="Yellow"><td><%#Eval("name") %></td>

                    <td><%#Eval("price") %></td>

                    <td><%#Eval("source") %></td>

                    <td><%#Eval("numbers") %></td>

                    <td><a href='Default3.aspx?ids=<%#Eval("ids") %>'>购买</a></td></tr>

                </ItemTemplate>

            <AlternatingItemTemplate>

                <tr bgcolor="#f3e"><td><%#Eval("name") %></td>

                    <td><%#Eval("price") %></td><td><%#Eval("source") %></td>

                    <td><%#Eval("numbers") %></td>

                    <td><a href='Default3.aspx?ids=<%#Eval("ids") %>'>购买</a> </td></tr>

            </AlternatingItemTemplate>

            <FooterTemplate> </table></FooterTemplate>

        </asp:Repeater>       

    </div>

    </form>

</body>

</html>
Repeater里面有5个标签,4个常用
<HeaderTemplate>:添加表头.
 <ItemTemplate>:类似于Body要查的数据引用C#代码 <%#Eval("列名")%> 用来传值.
 <AlternatingItemTemplate>: 与<ItemTemplate>替换,先显示<ItemTemplate>.
<FooterTemplate>:表的脚.
后台绑定代码:
using System;

using System.Collections;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

public partial class Default2 : System.Web.UI.Page

{

    protected void Page_Load(object sender, EventArgs e)

    {

        Literal1.Text =f;

        Repeater1.DataSource = new fruitDA().select();

        Repeater1.DataBind();
    }
}

这里绑定一个List<>泛型集合,最后要执行绑定 Repeater1.DataBind();

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