RestoreControlTree

Thursday, January 20, 2005

All Asp.Net Examples

Markup:

<%@ Register TagPrefix="cc1" Namespace="TemplatedSampleSite.aspnet_forum"
Assembly="TemplatedSampleSite" %>
<%@ Page language="c#" Codebehind="RestoreControlTree_Example.aspx.cs" AutoEventWireup="false" Inherits="TemplatedSampleSite.aspnet_forum.RestoreControlTree_Example" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
  <title>RestroreControlTreeExample</title>
  <meta name="GENERATOR" Content="Microsoft Visual Studio 7.0">
  <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="FlowLayout">
  <form id="RestroreControlTreeExample" method="post" runat="server">
   <P>
    <cc1:RestoreMyChildren id="LoadWriteUserControl1" runat="server" />
    <asp:Button id="Button1" runat="server" Text="Button"></asp:Button></P>
   <P> </P>
   <P> </P>
   <P>
    <asp:Button id="Button2" runat="server" Text="Nothing"></asp:Button></P>
  </form>
</body>
</HTML>

A codebehind and a class.

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 TemplatedSampleSite.aspnet_forum
{
/// <summary>
/// Summary description for RestroreControlTreeExample.
/// </summary>
public class RestoreControlTree_Example : System.Web.UI.Page
{
  protected System.Web.UI.WebControls.Button Button1;
  protected System.Web.UI.WebControls.Button Button2;
  protected TemplatedSampleSite.aspnet_forum.RestoreMyChildren LoadWriteUserControl1;

  private void Page_Load(object sender, System.EventArgs e)
  {
   if(!IsPostBack)
   {
    LoadWriteUserControl1.DataSource = FakeData;
    LoadWriteUserControl1.DataBind();
   }
  }
  protected ArrayList FakeData
  {
   get
   {
    ArrayList temp = new ArrayList();
    temp.Add(new string[]{"1","USD"});
    temp.Add(new string[]{"2","CAD"});
    return temp;
   }
  }
  #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.Load += new System.EventHandler(this.Page_Load);

}
#endregion

  private void Button1_Click(object sender, System.EventArgs e)
  {
   TextBox innerBox = LoadWriteUserControl1.FindControl("1") as TextBox;
   Response.Write(innerBox.Text + "<HR>");
   innerBox = LoadWriteUserControl1.FindControl("2") as TextBox;
   Response.Write(innerBox.Text + "<HR>");

   Label innerlabel = LoadWriteUserControl1.FindControl("Label2") as Label;
   innerlabel.Text = "BOO";
  }
}
public class RestoreMyChildren : Control
{
  ArrayList _dataSource;
  public ArrayList DataSource
  {
   get
   {
    return _dataSource;
   }
   set
   {
    _dataSource = value;
   }
  }
  private object[] Data
  {
   get
   {
    return ViewState["Data"] as object[];
   }
   set
   {
    ViewState["Data"] = value;
   }
  }
  override protected void LoadViewState(object savedState)
  {
   base.LoadViewState(savedState);
   EnsureChildControls();
  }

  protected override void OnDataBinding(System.EventArgs e)
  {
   PrepareData();
   base.OnDataBinding(e);
  }
  private void PrepareData()
  {
   if(DataSource==null)
   {
    return;
   }
   object[] buildData = new object[DataSource.Count];//2,DataSource.Count];
   for(int index=0;index<DataSource.Count;index++)
   {
    string[] item = DataSource[index] as string[];
    buildData[index] = new string[]{item[0],item[1]};
   }
   Data = buildData;
  }
  protected override void CreateChildControls()
  {
   base.CreateChildControls();
   foreach(object dataItem in Data)
   {
    string[] item = dataItem as string[];

    this.Controls.Add(new LiteralControl("<HR>"));

    Label label = new Label();
    label.ID="Label" + item[0];
    label.Text=item[1];
    this.Controls.Add(label);

    TextBox textbox = new TextBox();
    textbox.ID=item[0];
    textbox.Text=item[1];
    this.Controls.Add(textbox);
    this.Controls.Add(new LiteralControl("<HR>"));
   }
  }
}
}

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