Custom control's click event

[=?Utf-8?B?TWFyaw==?=]

Hi, I have built a custom control button which inherits from WebControl and
implements IPostBackEventH andler. The control also declares an event Click
and provides a method OnClick which invokes the registered delegate. All is
fine with my control until I try to add it to the page dynamically in a code
behind event handler and wire-up the click event using the normal syntax such
that;

protected void btnNew_Click(ob ject sender, EventArgs e)
{

...

BDTextButton bdtbSave = new BDTextButton();
...
...
bdtbSave.ID = "btnSave";
bdtbSave.Click += new EventHandler(th is.btnSave_OnCl ick);



When I do this the PostBack occurs but the event isn’t handled by the
handler I provid, i.e. the event didn’t seem to register.
After reading many posts I thought this may be because I was trying to
register the event too late in the page’s lifecycle. But, as a test I
dynamically added a Button webcontrol alongside my customcontrol and wired-up
an event handler for this which worked!

For further info my control is not a composite control it uses the Render
event to write it’s content using the HtmlTextWriter.

Why doesn’t my custom control’s event get registered when a webcontrol does?

[=?Utf-8?B?UGV0ZXIgQnJvbWJlcmcgW0MjIE1WUF0=?=]

RE: Custom control's click event

I'm afraid you'll probably need to post the code for the control itself,
rather than an example of how you are using it.
Peter

--
Site: http://www.eggheadcafe.com
UnBlog: http://petesbloggerama.blogspot.com
Short urls & more: http://ittyurl.net




"Mark" wrote:

Hi, I have built a custom control button which inherits from WebControl and
implements IPostBackEventH andler. The control also declares an event Click
and provides a method OnClick which invokes the registered delegate. All is
fine with my control until I try to add it to the page dynamically in a code
behind event handler and wire-up the click event using the normal syntax such
that;
>
protected void btnNew_Click(ob ject sender, EventArgs e)
{
>
..
>
BDTextButton bdtbSave = new BDTextButton();
..
..
bdtbSave.ID = "btnSave";
bdtbSave.Click += new EventHandler(th is.btnSave_OnCl ick);
>
>
>
When I do this the PostBack occurs but the event isn’t handled by the
handler I provid, i.e. the event didn’t seem to register.
After reading many posts I thought this may be because I was trying to
register the event too late in the page’s lifecycle. But, as a test I
dynamically added a Button webcontrol alongside my customcontrol and wired-up
an event handler for this which worked!
>
For further info my control is not a composite control it uses the Render
event to write it’s content using the HtmlTextWriter.
>
Why doesn’t my custom control’s event get registered when a webcontrol does?
>
>

[=?Utf-8?B?TWlsb3N6IFNrYWxlY2tpIFtNQ0FEXQ==?=]

RE: Custom control's click event

Howdy,

Dynamically created controls are not persited bewteen postback. You have to
recreate them go make postback event handler fire:

protected void Page_Load(objec t sender, EventArgs e)
{
if (IsPostBack && RecreateDynamic Button)
{
CreateDynamicBu tton();
}
}

private void CreateDynamicBu tton()
{
BDTextButton bdtbSave = new BDTextButton();
...
...
bdtbSave.ID = "btnSave";
bdtbSave.Click += new EventHandler(th is.btnSave_OnCl ick);

placeHodler.Con trols.Add(bdtbS ave);

}

protected void btnNew_Click(ob ject sender, EventArgs e)
{
...
CreateDynamicBu tton();

}

private bool RecreateDynamic Button
{
get
{
object value = ViewState["RecreateDynami cButton"];
return value == null ? false : (bool) value;
}
set
{
ViewState["RecreateDynami cButton"] = value;
}
}

Hope this helps
--
Milosz


"Mark" wrote:

Hi, I have built a custom control button which inherits from WebControl and
implements IPostBackEventH andler. The control also declares an event Click
and provides a method OnClick which invokes the registered delegate. All is
fine with my control until I try to add it to the page dynamically in a code
behind event handler and wire-up the click event using the normal syntax such
that;
>
protected void btnNew_Click(ob ject sender, EventArgs e)
{
>
..
>
BDTextButton bdtbSave = new BDTextButton();
..
..
bdtbSave.ID = "btnSave";
bdtbSave.Click += new EventHandler(th is.btnSave_OnCl ick);
>
>
>
When I do this the PostBack occurs but the event isn’t handled by the
handler I provid, i.e. the event didn’t seem to register.
After reading many posts I thought this may be because I was trying to
register the event too late in the page’s lifecycle. But, as a test I
dynamically added a Button webcontrol alongside my customcontrol and wired-up
an event handler for this which worked!
>
For further info my control is not a composite control it uses the Render
event to write it’s content using the HtmlTextWriter.
>
Why doesn’t my custom control’s event get registered when a webcontrol does?
>
>

[=?Utf-8?B?TWlsb3N6IFNrYWxlY2tpIFtNQ0FEXQ==?=]

RE: Custom control's click event

Small bug: i forgot to set RecreateDynamic Button after first creation in new
button click event handler, should be :

protected void btnNew_Click(ob ject sender, EventArgs e)
{
..
CreateDynamicBu tton();
RecreateDynamic Button = true;
}

Have a nice evening

--
Milosz


"Milosz Skalecki [MCAD]" wrote:

Howdy,
>
Dynamically created controls are not persited bewteen postback. You have to
recreate them go make postback event handler fire:
>
protected void Page_Load(objec t sender, EventArgs e)
{
if (IsPostBack && RecreateDynamic Button)
{
CreateDynamicBu tton();
}
}
>
private void CreateDynamicBu tton()
{
BDTextButton bdtbSave = new BDTextButton();
..
..
bdtbSave.ID = "btnSave";
bdtbSave.Click += new EventHandler(th is.btnSave_OnCl ick);
>
placeHodler.Con trols.Add(bdtbS ave);
>
}
>
protected void btnNew_Click(ob ject sender, EventArgs e)
{
..
CreateDynamicBu tton();
>
}
>
private bool RecreateDynamic Button
{
get
{
object value = ViewState["RecreateDynami cButton"];
return value == null ? false : (bool) value;
}
set
{
ViewState["RecreateDynami cButton"] = value;
}
}
>
Hope this helps
--
Milosz
>
>
"Mark" wrote:
>

Hi, I have built a custom control button which inherits from WebControl and
implements IPostBackEventH andler. The control also declares an event Click
and provides a method OnClick which invokes the registered delegate. All is
fine with my control until I try to add it to the page dynamically in a code
behind event handler and wire-up the click event using the normal syntax such
that;

protected void btnNew_Click(ob ject sender, EventArgs e)
{

..

BDTextButton bdtbSave = new BDTextButton();
..
..
bdtbSave.ID = "btnSave";
bdtbSave.Click += new EventHandler(th is.btnSave_OnCl ick);



When I do this the PostBack occurs but the event isn’t handled by the
handler I provid, i.e. the event didn’t seem to register.
After reading many posts I thought this may be because I was trying to
register the event too late in the page’s lifecycle. But, as a test I
dynamically added a Button webcontrol alongside my customcontrol and wired-up
an event handler for this which worked!

For further info my control is not a composite control it uses the Render
event to write it’s content using the HtmlTextWriter.

Why doesn’t my custom control’s event get registered when a webcontrol does?

[=?Utf-8?B?TWFyaw==?=]

RE: Custom control's click event

Thanks Milosz!




"Milosz Skalecki [MCAD]" wrote:

Small bug: i forgot to set RecreateDynamic Button after first creation in new
button click event handler, should be :
>
protected void btnNew_Click(ob ject sender, EventArgs e)
{
..
CreateDynamicBu tton();
RecreateDynamic Button = true;
}
>
Have a nice evening
>
--
Milosz
>
>
"Milosz Skalecki [MCAD]" wrote:
>

Howdy,

Dynamically created controls are not persited bewteen postback. You have to
recreate them go make postback event handler fire:

protected void Page_Load(objec t sender, EventArgs e)
{
if (IsPostBack && RecreateDynamic Button)
{
CreateDynamicBu tton();
}
}

private void CreateDynamicBu tton()
{
BDTextButton bdtbSave = new BDTextButton();
..
..
bdtbSave.ID = "btnSave";
bdtbSave.Click += new EventHandler(th is.btnSave_OnCl ick);

placeHodler.Con trols.Add(bdtbS ave);

}

protected void btnNew_Click(ob ject sender, EventArgs e)
{
..
CreateDynamicBu tton();

}

private bool RecreateDynamic Button
{
get
{
object value = ViewState["RecreateDynami cButton"];
return value == null ? false : (bool) value;
}
set
{
ViewState["RecreateDynami cButton"] = value;
}
}

Hope this helps
--
Milosz


"Mark" wrote:

Hi, I have built a custom control button which inherits from WebControl and
implements IPostBackEventH andler. The control also declares an event Click
and provides a method OnClick which invokes the registered delegate. All is
fine with my control until I try to add it to the page dynamically in a code
behind event handler and wire-up the click event using the normal syntax such
that;
>
protected void btnNew_Click(ob ject sender, EventArgs e)
{
>
..
>
BDTextButton bdtbSave = new BDTextButton();
..
..
bdtbSave.ID = "btnSave";
bdtbSave.Click += new EventHandler(th is.btnSave_OnCl ick);
>
>
>
When I do this the PostBack occurs but the event isn’t handled by the
handler I provid, i.e. the event didn’t seem to register.
After reading many posts I thought this may be because I was trying to
register the event too late in the page’s lifecycle. But, as a test I
dynamically added a Button webcontrol alongside my customcontrol and wired-up
an event handler for this which worked!
>
For further info my control is not a composite control it uses the Render
event to write it’s content using the HtmlTextWriter.
>
Why doesn’t my custom control’s event get registered when a webcontrol does?
>
>