Accessing data object on delete command.

[Cappy]

Hi guys.

I have a datagrind that is bound to a custom collection of a custom
object.

When a delete button is pressed in the datagrid, I not only want to
remove the row from the grid, I want to delete the object from the
collection that is bound to the grid.

So far I have this.

public void groupsGrid_DeleteCommand(object sender,
DataGridCommandEventArgs e)
{


try
{
//My Group object UMGroup grouptodelete =
(UMGroup)e.Item.DataItem;

// attempt delete
groupsCollection.Remove(grouptodelete);

}

catch(Exception exp)
{
Errortxt.Text = exp.Message;
}

//Disable Edit mode
groupsGrid.EditItemIndex = -1;

//Refresh data in grid
PopulateDatagrid();
}

My problem is, grouptodelete comesback with object undefined. Is there
away of getting access to the object that is supplying data to the row
that fired the delete command?

Thanks
Amit

[Elton W]

Hi Cappy,

In order to delete the object, you should get it first.
Suppose you have a key for the custom object. You can get
the key in couple of ways:

string key = datagrid.DataKeys[e.Item.ItemIndex];
string key = e.Item.Cells[key_Column_Index].Text; // for
BoundColumn
string key = ((contrl_type)e.Item.FindControl
("key_Column_ID")).Text; // for TemplateColumn

Then you can get your custom object by the key:
UMGroup grouptodelete = method_of_find_object(key);
// then delete the object
if (grouptodelete != null)
{
groupsCollection.Remove(grouptodelete);

}

HTH


Elton Wang
[email]elton_wang@hotmail.com[/email]

>-----Original Message-----
>Hi guys.
>
>I have a datagrind that is bound to a custom collection

of a custom

>object.
>
>When a delete button is pressed in the datagrid, I not

only want to

>remove the row from the grid, I want to delete the object

from the

>collection that is bound to the grid.
>
>So far I have this.
>
>public void groupsGrid_DeleteCommand(object sender,
>DataGridCommandEventArgs e)
> {
>
>
> try
> {
> //My Group object

UMGroup
grouptodelete =

>(UMGroup)e.Item.DataItem;
>
> // attempt delete
> groupsCollection.Remove

(grouptodelete);

>
> }
>
> catch(Exception exp)
> {
> Errortxt.Text =

exp.Message;

> }
>
> //Disable Edit mode
> groupsGrid.EditItemIndex = -1;
>
> //Refresh data in grid
> PopulateDatagrid();
> }
>
>My problem is, grouptodelete comesback with object

undefined. Is there

>away of getting access to the object that is supplying

data to the row

>that fired the delete command?
>
>Thanks
>Amit
>.
>