After reading this book "Professional ASP.NET Server Controls - Building
Custom Controls with C#",I have some questions.
Here are three files,as following:
file 1 :
using System;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ComponentModel;
using System.Drawing;
namespace WebControlLibrary1.Design
{
/// <summary>
/// Summary description for RepeaterControl.
/// </summary>
[DefaultProperty("Text"),
ToolboxData("<{0}:RepeaterControl
runat=server></{0}:RepeaterControl>")]
[ParseChildren(true)]
public class RepeaterControl :
System.Web.UI.WebControls.WebControl, INamingContainer
{
private ITemplate _itemTemplate;
private ITemplate _headerTemplate;
public int RepeatCount{
get{ return int.Parse(ViewState
["_repeatCount"].ToString()) ;}
set{ ViewState["_repeatCount"] =
value ;}
}
[TemplateContainer(typeof
(SimpleRepeaterItem))]
public ITemplate ItemTemplate{
get{ return _itemTemplate ;}
set{ _itemTemplate = value ;}
}
[TemplateContainer(typeof
(SimpleRepeaterItem))]
public ITemplate HeaderTemplate
{
get{ return _headerTemplate ;}
set{ _headerTemplate = value ;}
}
protected override void CreateChildControls
(){
Controls.Clear();
if((RepeatCount>0)&&(_itemTemplate!
=null))
{
if(_headerTemplate!=null)
{
SimpleRepeaterItem
headerContainer=new SimpleRepeaterItem();
_headerTemplate.InstantiateIn(headerContainer);
headerContainer.DataBind();
Controls.Add
(headerContainer);
}
for(int
i=0;i<RepeatCount;i++)
{
SimpleRepeaterItem
container=new SimpleRepeaterItem(5);
_itemTemplate.InstantiateIn(container);
container.DataBind
();
Controls.Add
(container);
}
}
else
{
Controls.Add(new
LiteralControl("please give the RepeatCount and
ItemTemplate"));
}
}
}
public class SimpleRepeaterItem : WebControl,
INamingContainer
{
private int ctlCount;
private PRControlLibrary.UpdateData upd1;
public SimpleRepeaterItem(int cc)
{
this.ctlCount=cc;
this.upd1=new UpdateData();
}
public SimpleRepeaterItem()
{
ctlCount=0;
}
}
}
file 2 :
<%@ Page language="c#" Codebehind="Control1.aspx.cs"
AutoEventWireup="false" Inherits="Test8.Control1" %>
<%@ Register TagPrefix="cc1"
Namespace="WebControlLibrary1.Design"
Assembly="WebControlLibrary1" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0
Transitional//EN" >
<HTML>
<HEAD>
<title>Control1</title>
<meta content="Microsoft Visual Studio
7.0" name="GENERATOR">
<meta content="C#" name="CODE_LANGUAGE">
<meta content="JavaScript"
name="vs_defaultClientScript">
<meta
content="http://schemas.microsoft.com/intellisense/ie5"
name="vs_targetSchema">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Control1" method="post"
runat="server">
<asp:button id="Button1" style="Z-
INDEX: 101; LEFT: 356px; POSITION: absolute; TOP: 4px"
runat="server" Text="More 5>>"></asp:button>
<cc1:repeatercontrol
id="RepeaterControl1" style="Z-INDEX: 102; LEFT: 20px;
POSITION: absolute; TOP: 40px" runat="server"
RepeatCount="5" Width="750px">
<HeaderTemplate></HeaderTemplate>
<ItemTemplate>
<div style="BORDER-
TOP: #ff3366 thin groove; BACKGROUND-COLOR:
#cccc66">EmpName:
<asp:TextBox Runat="server"
Width="50px"></asp:TextBox></div>
</ItemTemplate>
</cc1:repeatercontrol><asp:textbox
id="TextBox1" style="Z-INDEX: 103; LEFT: 487px; POSITION:
absolute; TOP: 4px" runat="server"
Width="55px"></asp:textbox>
<asp:button id="Button2" style="Z-
INDEX: 104; LEFT: 270px; POSITION: absolute; TOP: 4px"
runat="server" Text="Check"></asp:button>
</form>
</body>
</HTML>
file 3 :
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;
using System.Data.Common;
namespace Test8
{
/// <summary>
/// Summary description for Control1.
/// </summary>
public class Control1 : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Button
Button1;
protected
System.Web.UI.WebControls.TextBox TextBox1;
protected System.Web.UI.WebControls.Button
Button2;
protected
WebControlLibrary1.Design.RepeaterControl RepeaterControl1;
private void Page_Load(object sender,
System.EventArgs e)
{
// Put user code to initialize the
page here
}
#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: This call is required
by the ASP.NET Web Form Designer.
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// Required method for Designer support -
do not modify
/// the contents of this method with the
code editor.
/// </summary>
private void InitializeComponent()
{
this.Button1.Click += new
System.EventHandler(this.Button1_Click);
this.Button2.Click += new
System.EventHandler(this.Button2_Click);
this.Unload += new
System.EventHandler(this.Page_UnLoad);
this.Load += new
System.EventHandler(this.Page_Load);
this.PreRender += new
System.EventHandler(this.Page_PreRender);
}
#endregion
private void Button1_Click(object sender,
System.EventArgs e)
{
RepeaterControl1.RepeatCount=10;
}
private void Page_PreRender(object sender,
EventArgs e){
string
a=TextBox1.Width.Value.ToString();
}
private void Page_UnLoad(object sender,
EventArgs e){
string
a=TextBox1.Width.Value.ToString();
}
private void Button2_Click(object sender,
System.EventArgs e)
{
}
}
}
I have a question is that :
First,I want to have 5 repeat ItemTemplate when I first-
in,since the property value in "RepeatCount" is 5. After
filling the employee's name in textbox more then 5
records, I must create anthor 5 ItemTemplate. By clicking
the button "More 5>>",I could have 10 records in
imagination. But ,in fact, I must click the button
twice,it can be true. Why does it happen? In addition,I
also want to save the viewstate and values of all textbox
controls that had been input the employee's name,when
clicking the button caused postback event.
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