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  • 用Repeater控件显示主从关系数据表

    TOP.ASPX 

    <%@ Page Debug="true" language="c#" Codebehind="Top.aspx.cs" Inherits="QA.Top" %>
     1<%@ Page Debug="true" language="c#" Codebehind="Top.aspx.cs"  Inherits="QA.Top" %>
     2
     3<HTML>
     4    <HEAD>
     5        <title>Top</title>
     6        <meta name="CODE_LANGUAGE" Content="C#">
     7    </HEAD>
     8    <body>
     9        <form id="Form1" method="post" runat="server">
    10        <asp:repeater ID="Class" runat="server" OnItemCreated="Class_ItemCreated"> 
    11     <itemtemplate> <br><b><%# DataBinder.Eval(Container.DataItem, "ClassName") %>:</b>
    12            <asp:repeater ID="Forum" runat="server">
    13                 <itemtemplate><%# DataBinder.Eval(Container.DataItem, "ClassName") %>
    14                 </itemtemplate>
    15            </asp:repeater>
    16     </itemtemplate> 
    17</asp:repeater>
    18        </form>
    19    </body>
    20</HTML>
    21

    Top.aspx.cs

     1using System;
     2using System.Configuration;
     3using System.Data;
     4using System.Data.OleDb;
     5using System.Text;
     6using System.Web;
     7using System.Web.UI;
     8using System.Web.UI.WebControls;
     9using System.Web.UI.HtmlControls;
    10
    11namespace QA
    12{
    13    /// <summary>
    14    /// Top 的摘要说明。
    15    /// </summary>
    16    public class Top : System.Web.UI.Page
    17    {
    18        /// <summary>
    19        /// 数据库连接
    20        /// </summary>
    21
    22        public static string strConn
    23        {
    24            get
    25            {
    26                StringBuilder strResult = new StringBuilder(ConfigurationSettings.AppSettings["Provider"]);
    27                strResult.Append("; ");
    28                strResult.Append("Data Source = ");
    29                strResult.Append(HttpContext.Current.Server.MapPath("."));
    30                strResult.Append("\\");
    31                strResult.Append(ConfigurationSettings.AppSettings["DataSource"]);
    32                return strResult.ToString();
    33            }
    34        }
    35        protected string strSQL;
    36        protected OleDbDataAdapter Adpt = new OleDbDataAdapter();
    37        protected DataSet Ds = new DataSet();
    38        protected OleDbConnection Conn = new OleDbConnection(strConn);
    39        protected Repeater Class = new Repeater();
    40        protected OleDbCommand Cmd = new OleDbCommand();
    41
    42        private void Page_Load(object sender, System.EventArgs e)
    43        {
    44            if(!Page.IsPostBack)
    45            {
    46                strSQL = "SELECT * FROM Qclass WHERE Dclass = 0";
    47                Adpt = new OleDbDataAdapter(strSQL, Conn);
    48                Adpt.Fill(Ds, "Class");
    49                Class.DataSource = Ds.Tables["Class"].DefaultView;
    50                Class.DataBind();
    51            }
    52
    53        }
    54        protected DataTable Forum_Source(int id)
    55        {
    56            if (Ds.Tables.Contains("Forum") && Ds.Tables.CanRemove(Ds.Tables["Forum"])) 
    57                Ds.Tables.Remove("Forum");
    58            strSQL = "SELECT * FROM Qclass WHERE Dclass = @id";
    59            Cmd = new OleDbCommand(strSQL, Conn);
    60            Cmd.Parameters.Add(new OleDbParameter("@id", OleDbType.Integer)).Value = id;
    61            Adpt = new OleDbDataAdapter(Cmd);
    62            Adpt.Fill(Ds, "Forum");
    63            return Ds.Tables["Forum"];
    64        }
    65        //控件调用的OnItemCreated类
    66        protected void Class_ItemCreated(object sender, RepeaterItemEventArgs e)
    67        {
    68            ((Repeater)e.Item.FindControl("Forum")).DataSource = Forum_Source(int.Parse(((System.Data.DataRowView)e.Item.DataItem)["id"].ToString())).DefaultView;
    69        }
    70    
    71    }
    72}
    73
    <%# DataBinder.Eval(Container.DataItem, "ClassName") %>


    数据库表如下:

    当Dclass为0时,此分类为主分类,当Dclass不为0时为小分类,并与主分类ID对应!
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  • 原文地址：https://www.cnblogs.com/jiangyuxuan/p/843486.html
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