Source code for LayoutMan web control

<%@ Register TagPrefix="UVc" Namespace="Asp2Aspx" Assembly="Asp2Aspx" %>

<%@ Page Language="C#" %>

<!DOCTYPEHTMLPUBLIC"-//W3C//DTD HTML 4.0 Transitional//EN">

<HTML>
      < HEAD >
            <title>LayoutMan by Kevin , Josh </title>
            < script runat ="server">
            private void Page_Load(object sender, System.EventArgs e)
            {
                  lbl.Text = "PAGE_LOAD(): Align is: " + uvcBox.Alignment + "<BR>" + uvcBox.TestMessage;
            }

            protected void btnSubmit_onClick(object sender, EventArgs e)
            {
                  if (uvcBox.Alignment == LayoutMan.VerticalAlignment) {
                        uvcBox.Alignment = LayoutMan.HorizontalAlignment;
                 } else {
                        uvcBox.Alignment = LayoutMan.VerticalAlignment;
                  }
                  lbl.Text = "btnSubmit_onClick() Align is: " + uvcBox.Alignment + "<BR>" + uvcBox.TestMessage;
            }

</ script >

</ HEAD >

< body >

< form runat ="server" ID ="Form1">

< h2 >

Kevin & Josh's LayoutMan Control (source code here)

</ h2 >

< ul >

< li >

Click day 12 in the first calendar.

< li >

Click day 12 in the second calendar, which is not contained within the

LayoutMan control.

< li >

Click the <strong>Swap My Alignment!</strong>

button. This will now lay out the LayoutMan control's contents horizontally.

< li >

Now, click that button again, and this time the LayoutMan's Calendar remembers

that it has day 12 selected.</li>

</ ul >

< p >

< asp:Label id ="lbl" runat ="server" />

</ p >

< p >

< UVc:LayoutMan id ="uvcBox" runat ="server">

<asp:Panelid="Panel1"runat="server"BackColor="LightGreen"BorderWidth="1">Hi!</asp:Panel>

<asp:Panelid="Panel2"runat="server"BackColor="LightGreen"BorderWidth="1">Testing!</asp:Panel>

< asp:Calendar id ="Calendar1" runat ="server"></ asp:Calendar >

</ UVc:LayoutMan >

</ p >

< p >

< asp:Button id ="btnSubmit" OnClick ="btnSubmit_onClick" runat ="server" Text ="Swap My Alignment!" />

</ p >

< BR >

< asp:calendar runat ="server" ID ="Calendar2" />

</ form >

</ body >

</HTML>

// (C)2001 Kevin 
// Layoutman.aspx.cs
// This is only code for demonstration purposes
 
using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Collections;
using System.Web.SessionState;
using System.Collections.Specialized;

 
namespace Asp2Aspx
{
      public class LayoutMan : System.Web.UI.Control, INamingContainer
      {
            public const int VerticalAlignment = 0;
            public const int HorizontalAlignment = 1;
            private ArrayList m_arrParsedControls = new ArrayList();
            private Table m_tbl = null;
            public string TestMessage;          
            public int Alignment
            {
                  get 
                  {
                        if(ViewState["Alignment"] == null) return VerticalAlignment;
                        return (int) ViewState["Alignment"];
                  }
                  set 
                  {
                        ViewState["Alignment"] = value;
                  }
            }
                  
            protected override void AddParsedSubObject(Object obj) 
            {
                  if (obj is LiteralControl == false) 
                  {
                        m_arrParsedControls.Add(obj);
                  }
            }

 
            // OnInit and Render both must be called as shown below in order for calendar to retain state
            protected override void OnInit(EventArgs e) 
            {
                  RenderLayout();
                  // Do not call base.OnInit or else we cause unwanted results (loss of state in calendar)
            }
            
            protected override void Render(System.Web.UI.HtmlTextWriter writer)
            {
                  RenderLayout();
                  base.Render(writer);
            }

 
            // This was of no help...
            //          protected override void CreateChildControls()
            //          {
            //                RenderLayout();
            //          }

 

 
            protected void RenderLayout() 
            {
                  //protected override void OnPreRender(EventArgs e) {
                  TableRow trow = null;
                  TableCell tcell = null;
                  int n1 = Controls.Count;

 
                  switch(Alignment)
                  {
                        case VerticalAlignment:
                              Controls.Clear();
                              m_tbl = new Table();
                              m_tbl.BorderWidth = 5;              
                              m_tbl.BackColor = System.Drawing.Color.LightGray;

 
                              TestMessage = "Vertical Alignment = " + Alignment + " m_arrParsedControls.Count=" + m_arrParsedControls.Count + ", Control count is " + n1 + "<BR>";
                              foreach (object o in m_arrParsedControls) 
                              {                       
                                    Control c = (Control) o;                              
                                    tcell = new TableCell();
                                    trow = new TableRow();
                                    string s = c.ClientID;
                                    TestMessage += " adding " + s;
                                    tcell.Controls.Add(c);
                                    trow.Cells.Add(tcell);
                                    m_tbl.Rows.Add(trow);
                              }
                              Controls.Add(m_tbl);
                              break;

 
                        case HorizontalAlignment:
                              Controls.Clear();
                              m_tbl = new Table();
                              m_tbl.BorderWidth = 5;              
                              m_tbl.BackColor = System.Drawing.Color.LightGray;
                              trow = new TableRow();
                              m_tbl.Rows.Add(trow);

 
                              TestMessage = "Horizontal Alignment = " + Alignment + " m_arrParsedControls.Count=" + m_arrParsedControls.Count + ", control count is " + n1 + "<BR>";

 
                              foreach (object o in m_arrParsedControls) 
                              {                       
                                    Control c = new Control();
                                    c = (Control)  o;
                                    tcell = new TableCell();
                                    string s = c.ClientID;
                                    TestMessage += " adding " + s;
                                    tcell.Controls.Add(c);
                                    trow.Cells.Add(tcell);
                              }
                              Controls.Add(m_tbl);
                              break;
                        default:
                              // Never will happen...
                              TestMessage = "DEFAULT Alignment = " + Alignment + " m_arrParsedControls.Count=" + m_arrParsedControls.Count + ", control count is " + n1;
                              break;
                  }
                  Dispose(); // Clean up... not needed but why chance memory leaks?
            }
      }
}