現在在學習服務器控件開發，感覺有的難度，比WinForm的難的多。
今天自己做了一個簡單的Repeater控件，當然不是很好，像vs2003自己的Repeater有好HeadTempLate 和ItemTempLate 和FootTempLate 三項模板，我自己做的只有一項，那就是 ItemTemp，也只能做簡單的數據綁定，廢話也不多說了，還是請各位網友看看源代碼吧，
using System;using System.Web;using System.Web.UI;using System.Collections;namespace WebControlLib.CH7
{
/// <summary>
/// 簡單的數據綁定控件
/// </summary> [PersistChildren(true)] public class SimpleRepeater:Control,INamingContainer { private ITemplate _template = null; private ICollection _datasource = null; public ICollection DataSource { get { return this._datasource; } set { this._datasource = value; } } [TemplateContainer(typeof(RepeaterItem))] public ITemplate ItemTempLate { get { return this._template; } set { this._template = value; } } protected override void AddParsedSubObject(object obj) { base.AddParsedSubObject (obj); } protected override void CreateChildControls() { object obj = ViewState["NumData"]; this.Controls.Clear(); if(obj!=null) { int num = Convert.ToInt32(obj); for(int i=0;i<num;i++) { RepeaterItem pi =new RepeaterItem(i,null); _template.InstantiateIn(pi); this.Controls.Add(pi); } } } protected override void OnDataBinding(EventArgs e) { base.OnDataBinding (e); if(DataSource != null) { Controls.Clear(); ClearChildViewState(); IEnumerator data = DataSource.GetEnumerator(); int i =0; while(data.MoveNext()) { RepeaterItem item = new RepeaterItem(i,data.Current); _template.InstantiateIn(item); this.Controls.Add(item); i++; } ChildControlsCreated = true; ViewState["NumData"] =i; } } } public class RepeaterItem:Control,INamingContainer { private int _index; private object _dataitem; public RepeaterItem(int index, object dataitem) { this._index = index; this._dataitem = dataitem; } public int Index { get { return this._index; } } public object DataItem { get { return this._dataitem; } set { this._dataitem =value; } } }
}
下面是在網頁中課戶端調用的代碼：
<%@ Register TagPrefix="ableit" Namespace="WebControlLib.CH4" Assembly="WebControlLib" %><%@ Page language="c#" Codebehind="WebImageDemo.aspx.cs" AutoEventWireup="false" Inherits="WebControlDemo.CH4.WebImageDemo" %><%@ Register TagPrefix="cc1" Namespace="AbleControlsLib" Assembly="WebControlLib" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" ><HTML> <HEAD> <title>WebImageDemo</title> <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1"> <meta name="CODE_LANGUAGE" Content="C#"> <meta name="vs_defaultClientScript" content="JavaScript"> <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5"> </HEAD> <body MS_POSITIONING="GridLayout"> <form id="Form1" method="post" runat="server"> <cc1:SimpleRepeater id="SimpleRepeater1" runat="server"> <ITEMTEMPLATE> <TABLE borderColor="#ff3333" border="1"> <TR> <TD><%# Container.DataItem%></TD> </TR> </TABLE> </ITEMTEMPLATE> </cc1:SimpleRepeater> </form> </body></HTML>
下面是服務器代碼：
using System;using System.Collections;using System.ComponentModel;using System.Data;using System.Drawing;using System.Web;using System.Web.SessionState;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.HtmlControls;namespace WebControlDemo.CH4{ /// <summary> /// WebImageDemo 的摘要說明。 /// </summary> public class WebImageDemo : System.Web.UI.Page { protected AbleControlsLib.SimpleRepeater SimpleRepeater1; private void Page_Load(object sender, System.EventArgs e) { // 在此處放置用戶代碼以初始化頁面 System.Collections.ArrayList array = new ArrayList(); array.Add("AAA"); array.Add("BBB"); array.Add("CCC"); array.Add("DDD"); array.Add("EEE"); array.Add("FFF"); array.Add("GGG"); array.Add("JJJ"); array.Add("HHH"); this.SimpleRepeater1.DataSource = array; this.SimpleRepeater1.DataBind(); }
Web 窗體設計器生成的代碼 }}
因爲我用的數據源是ICollection，所以綁定時，也只能是ICollection他派生的數據源；
如果大家有什麼意見，請多多指教和留言！！