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7/7/2005 5:50:19 PM

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4 Items, 1 Pages 1 |< << Go >> >|

	mxmissile
	Asp.Net User

Building a Custom Control

7/7/2005 5:50:19 PM

0/0

I am trying to build a simple control based off a PlaceHolder. When I drop this on a webform, it renders correctly but my event does not fire. At a glance can anyone see what is wrong?

using System;
using System.ComponentModel;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace MyControls
{
    public class TestButtons : System.Web.UI.WebControls.PlaceHolder
   {
      public TestButtons() : base() {}
      public delegate void ClickHandler(object sender,ClickResponse response);

      [ Description("Fires when a button is clicked."), Category("Action"), Bindable(true) ]
      public event ClickHandler OnClick;

      public override ControlCollection Controls { get { EnsureChildControls(); return base.Controls; } }

      private void btnOk_Click(Object sender, EventArgs e) { this.OnClick(sender,ClickResponse.Ok); }

     private void btnCancel_Click(Object sender, EventArgs e) { this.OnClick(sender,ClickResponse.Cancel); }

     private Literal Spacer() { Literal lit = new Literal(); lit.Text = "  "; return lit; }

      protected override void CreateChildControls()
      {
         System.Web.UI.WebControls.Button b = new Button();
         b.Text = "Ok";
         b.Width = 60;
         b.Click += new EventHandler(btnOk_Click);
         this.Controls.Add(b);
         this.Controls.Add(Spacer());

         b = new Button();
         b.Text = "Cancel";
         b.Width = 60;
         b.Click += new EventHandler(btnCancel_Click);
         this.Controls.Add(b);
         this.Controls.Add(Spacer());

         base.CreateChildControls();
      }

      public enum ClickResponse { Ok, Cancel } } }

http://www.heliosfx.com

	Raterus
	Asp.Net User

Re: Building a Custom Control

7/7/2005 6:24:48 PM

0/0

Try setting an id on both of the button's, sometimes this can have a big effect if you don't.
http://scottonwriting.net/sowblog/posts/3962.aspx

Ask and it will be given to you; seek and you will find; knock and the door will be opened to you. Luke 11:9

	mxmissile
	Asp.Net User

Re: Building a Custom Control

7/7/2005 7:49:46 PM

0/0

I just added unique string IDs to both buttons. Changed the OnClick handler to just Click. Still wont fire.

http://www.heliosfx.com

	billrob458
	Asp.Net User

Re: Building a Custom Control

7/8/2005 6:57:03 PM

0/0

I really wasn't able to determine why you events weren't firing, but I did come up with a fix.

protected override void OnLoad(EventArgs e)
{
EnsureChildControls();
base.OnLoad (e);
}

In the load method of the your control you should call EnsureChildControls. The only thing I could figure is I know the Framework calls EnsureChildControls during the PreRender event of the page. (during the InteralPreRenderRecursive call). This might be too late a time to fire events off, of perhaps the framework doesn't event check for events this late in the lifecycle. (I am really not sure, I am just making that part up.)

bill

4 Items, 1 Pages 1 |< << Go >> >|

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