Problem with Dynamical Controls

Gayathri79 · March 12th, 2010, 02:28 AM

Hi,
I am using Table class in page load event to display my records from database.

I have buttton Control in my Design mode. I just want to add this controls to the Table Cell in my Table Class in page_load event for every single record it displays from database.
say if database displays 5 records, then i want 5 instances of this single button in each record.

The result is: i am getting this Button only in the last record it is displaying.
I am adding this control using the button ID.Iam working on this for a long time. Could somebody help?

DRCTECH · March 12th, 2010, 07:08 AM

You need create a table cell first. Then store the button control in the table cell. Then add the cell to each new table row.

Gayathri79 · March 12th, 2010, 06:47 PM

Yes thats how i have added Custom control inside the cell within a loop. So that every time it display a record from database , i want that custom control to be shown in each record.

But iam getting only in a final record.

I think since i have only one Custom Button control which has a single ID. It is displaying only once. I want the instances of that control to display in all the records.
My code is like this:

After i set the connection string,

while (reader.Read())
{
-----
-----
TableRow comm = new TableRow();

TableHeaderCell commvote = new TableHeaderCell();
commvote.Controls.Add(btnInfo);(btnInfo is the button control which i created in the design mode. It is getting added in the final record but not in the first few records.)

}

So I am very confused.

Imar · March 13th, 2010, 07:19 AM

Hi there,

When you do this:

Code:

commvote.Controls.Add(btnInfo);

you *move* the Button from its previous location to the Controls collection of the current commvote. In other words, you can't have the same Button show up in multiple places. Instead, inside the loop you need to instantiate a new Button every time:

Code:

 
Button btnInfo = new Button();
... do what you need to do with btnInfo here, like settings its ID
commvote.Controls.Add(btnInfo);

Hope this helps,

Imar

Gayathri79 · March 15th, 2010, 05:04 PM

Thanks you so much. I also tried what you suggested me. It worked, Buttons are added for all the records, but the function I specified inside the Button is not working.

I am trying to add a Panel which contain some data from Database to be displayed when the Mouse Hover on the Dynamic Button i added. I could see only the Button. But when i hover on it or when i click it, it wasn't working. please help.

My codeings are like this:

while ()
{
------------
------------
----------
Button but1 = new Button();
but1.Text = "Hover button";

Panel pan1 = new Panel();
Label lab = new Label();
lab.Text = "Empty Panel";
pan1.Controls.Add(lab);

AjaxControlToolkit.HoverMenuExtender hov= new AjaxControlToolkit.HoverMenuExtender();
hov.TargetControlID = "but1";
hov.PopupControlID = "pan1";
commvote.Controls.Add(lnkbut);
-------
}

Imar · March 15th, 2010, 05:17 PM

This is all very unclear. What error? When? In the browser or at compile / development / runtime? And what is lnkbut? And what is commvote? And why are you instantiating hov but then never use it?

In other words: please be more specific. Supplied relevant code, a detailed description of the situation and clear error messages. Otherwise, we won't be able to help you out.

Cheers,

Imar

Gayathri79 · March 16th, 2010, 12:01 AM

Sorry about that. I was unclear.

After the connection string has been set, I dynamically wants to display records using Table Class inside this loop. Where i want to display the dynamically created button 'but1' in each record from Database.

'hov' is the Ajax Hover menu extender which i want to display a panel contains some information say 'label', when i hover on the dynamic button 'but1' .

I am not getting any Error Messages. I am getting the dynamically created Button in each records inside the Table. But when i hover on it, it is not displaying a Panel which i created using Hovermenu extender.

Coding is:

while (Reader.read())
{
TableRow ---
TableHeaderCell commvote = new TableHeaderCell();
Button but1 = new Button(); //(This is the button i want to display in each Record from database).

but1.Text = "Hover button";
AjaxControlToolkit.HoverMenuExtender hov= new AjaxControlToolkit.HoverMenuExtender();

Panel pan1 = new Panel();
Label lab = new Label();
lab.Text = "Empty Panel";
pan1.Controls.Add(lab);
hov.TargetControlID = "but1";
hov.PopupControlID = "pan1";

commvote.Controls.Add(but1);

}

Also I tried this using LinkButton Control i dynamically created instead of a Button Control. Its not working for that either.

Imar · March 16th, 2010, 09:57 AM

Hi there,

It's still not very clear, but it looks to me you're not adding all the necessary controls. For example, you only add the button but you don't had the hov control...

Cheers,

Imar

Gayathri79 · March 16th, 2010, 12:38 PM

Sorry i dont really know how to add the 'hov' control. I thought i did it by using the code:

AjaxControlToolkit.HoverMenuExtender hov= new AjaxControlToolkit.HoverMenuExtender();

Because when i tried this using custom control from Tool box, it worked. But cannot do it dynamically.

So is that the Issue?

Thanks
Gayathri

Imar · March 16th, 2010, 01:17 PM

Nope, that doesn't add the control. It just instantiates it in memory. It will be gone as soon as the method is done.

You need to add it to a container control like commvote, just as you're doing with the button using the Add method. That way it gets sent to the browser, just as the button....

Hope this helps,

Imar