Creating Templated Databound Controls : CompositeControl « Custom Controls « ASP.NET Tutorial

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ASP.NET Tutorial » Custom Controls » CompositeControl 
14. 20. 9. Creating Templated Databound Controls
File: DivView.cs

using System;
using System.Collections;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace MyNamespace
{
    public class DivView : CompositeDataBoundControl
    {
        private ITemplate _itemTemplate;

        [TemplateContainer(typeof(DivViewItem))]
        [PersistenceMode(PersistenceMode.InnerProperty)]
        public ITemplate ItemTemplate
        {
            get return _itemTemplate; }
            set _itemTemplate = value; }
        }

        protected override int CreateChildControls(IEnumerable dataSource, bool dataBinding)
        {
            int counter = 0;
            foreach (object dataItem in dataSource)
            {
                DivViewItem contentItem = new DivViewItem(dataItem, counter);
                _itemTemplate.InstantiateIn(contentItem);
                Controls.Add(contentItem);
                counter++;
            }
            DataBind(false);
            return counter;
        }

        protected override HtmlTextWriterTag TagKey
        {
            get
            {
                return HtmlTextWriterTag.Div;
            }
        }
    }


    public class DivViewItem : WebControl, IDataItemContainer
    {
        private object _dataItem;
        private int _index;
        public object DataItem
        {
            get return _dataItem; }
        }

        public int DataItemIndex
        {
            get return _index; }
        }

        public int DisplayIndex
        {
            get return _index; }
        }

        protected override HtmlTextWriterTag TagKey
        {
            get
            {
                return HtmlTextWriterTag.Div;
            }
        }

        public DivViewItem(object dataItem, int index)
        {
            _dataItem = dataItem;
            _index = index;
        }

    }
}
File: Default.aspx

<%@ Page Language="C#" %>
<%@ Register TagPrefix="custom" Namespace="MyNamespace" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <style type="text/css">
        .products
        {
            width:500px;
        }
        .products div
        {
            border:solid 1px black;
            padding:10px;
            margin:10px;
        }
    </style>
    <title>Show DivView</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

    <custom:DivView
        id="lstProducts"
        DataSourceID="srcProducts"
        CssClass="products"
        Runat="Server">
        <ItemTemplate>
        <h1><%# Eval("Title"%></h1>
        Director: <%# Eval("Director"%>
        </ItemTemplate>
    </custom:DivView>


    <asp:SqlDataSource
        id="srcProducts"
        ConnectionString="<%$ ConnectionStrings:Products %>"
        SelectCommand="SELECT Title, Director FROM Products"
        Runat="server" />

    <br />
    <asp:LinkButton
        id="lnkReload"
        Text="Reload"
        Runat="server" />

    </div>
    </form>
</body>
</html>
14. 20. CompositeControl
14. 20. 1. Building Composite Controls
14. 20. 2. Building Hybrid Controls
14. 20. 3. Performing layout with an HTML table.
14. 20. 4. Item Rotator
14. 20. 5. Image Rotator
14. 20. 6. Creating a Default Template
14. 20. 7. File: Product.cs
14. 20. 8. Supporting Two-Way Databinding
14. 20. 9. Creating Templated Databound Controls
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