ImageButton won't fire click event (Composite Control).

Question

User-400304391 posted

Hi!

I'm creating a Composite Control which holds an asp:ImageButton, but it wont fire the click event i've added to it. I've tried adding an ordinary asp:Button and it works perfectly.

The control is instantiated in CreateChildControls like this:
 

imageBtn = new ImageButton();
imageBtn.ImageUrl = "../Images/Button.JPG";
imageBtn.AlternateText = "Send";
imageBtn.Click += new ImageClickEventHandler(imageBtn_Click);

 

And  the click event is defined like this:

public void imageBtn_Click(object sender, ImageClickEventArgs e)
{
    int i = 0;
}

The button is then rendered  in the Render  method like this:

 

imageBtn.RenderControl(writer);

 

I don't know what I'm missing since an ordinary button works as it should and it's defined almost exactly as the ImageButton, except for using EventHandler instead of

ImageClickEventHandler, any ideas?

 
Regards

/sZ
 
 

Answer 1

User1968518401 posted

Hi r u able to view image?

Answer 2

User1174340047 posted

I don't have a idea why the event handler is called, but i think you don't have to write code to render the  image buton because it will render by itself.

Answer 3

User-667042492 posted

hi,

where do you add this event in your custom class? You can add event like that..

protected override void OnLoad(EventArgs e)

{

base.OnLoad(e);

imageBtn.Click += new ImageClickEventHandler(imageBtn_Click);

} 

and the other way below, maybe solve your problem;

public static readonly object ImageClick = new object();

public event ImageClickEventHandler ImageClicked
{
add
{
  this.Events.AddHandler(ImageClick, value);
}
remove
{
  this.Events.RemoveHandler(ImageClick, value);
}
}

protected virtual void OnImageClick(ImageClickEventArgs args) // i'm not sure for the method name

{

Delegate handler = this.Events[ImageClick];

if (null != handler)

handler.DynamicInvoke(this, args);

}

 i hope this help you..

Answer 4

User-1407570774 posted

Hi there,

 

1    using System.Web.UI;
2    using System.Web.UI.WebControls;
3    
4    namespace WebApplication1
5    {
6    
7        [ToolboxData("<{0}:ImgBtn runat=\"server\" />")]
8        public class ImgBtn : CompositeControl, INamingContainer
9        {
10   
11           protected override void CreateChildControls()
12           {
13               ImageButton ctl = new ImageButton();
14               ctl.ImageUrl = "~/access_16x16.gif";
15               ctl.Click += new ImageClickEventHandler(ctl_Click);
16   
17               this.Controls.Add(ctl);
18   
19               base.CreateChildControls();
20           }
21   
22           private void ctl_Click(object sender, ImageClickEventArgs e)
23           {
24               throw new System.NotImplementedException();
25           }
26   
27       }
28   
29   }

  

Answer 5

User-400304391 posted

Hello and thanks for the replies!

I set the click event in createchildcontrols. I haven't had the chance to try your suggestions yet, will do it first thing tomorrow. Really appreciated.

Regards

/sZ

Answer 6

User1044508394 posted

Hi Shakazed,

Can I please ask how you get your ImageBotton to fire click event in your composite control? I know it's so long ago, but I'm hoping you could help because I'm having the same issue.

Thanks heaps

-cb-