Confirm Delete

[Travis]

Is there a way to confirm the user really wants to delete a record in the grid when they click on the delete key?

[Vlad]

Hi Travis,

 You can use Deleting event to achieve this. Here is an example:

private void RadGridView_Deleting(object sender, Telerik.Windows.Controls.GridViewDeletingEventArgs e)

        {

            var result = MessageBox.Show("Test", "Test", MessageBoxButton.OKCancel);

            e.Cancel = (result == MessageBoxResult.Cancel);

        }

Sincerely yours,
Vlad
the Telerik team

[Travis]

The deleting event handler is not fired when the "Delete" key is pressed.  The ItemsSource of the GridView is using RIA.  I don't know if that makes a difference or not.

[Vlad]

Hello,

 How the grid is bound in your case? If you use DomainDataSource everything should work as expected. 

Sincerely yours,
Vlad
the Telerik team

[lee_bnsf]

I'm have a similar situation.  Is there a way to get the grid to respond to the delete key without being bound to a DomainDatasource; or in my case bound to a read-only entity in a DomainDatasource?

Thanks,
Lee

[Vlad]

Hello,

 If the grid is not bound at least to IList you will unable to add and remove items and that is why the event will not be raised. 

Kind regards,
Vlad
the Telerik team

[lee_bnsf]

Thanks Vlad. As soon as I posted this I saw that my grid did not the CanUserDeleteRows property set to true.  When I updated that everything worked as expected.  Rookie mistake. :(
Thanks,
Lee

[Travis]

It is working now.  Not sure what I was doing wrong the first time.

[Marc Roussel]

I feel lucky this time.

What if I'm in the Deleting Event and even before asking the user to confirm, the line is already deleted from the UI because I hit Delete from the keyboard on a line

When I say NO and I code e.Cancel = true, it doesn't any good.

I'm using version 2013.1.403.1050
Here's the code :

private void rgvExpenses_Deleting(object sender, GridViewDeletingEventArgs e)
{
    // Huh ? The line is already deleted from the UI.  I can see it while the confirmation is on screen
    RadWindow.Confirm("Are you sure ?", (s, ee) =>
        {
            if (ee.DialogResult.Value)
                e.Cancel = false;       // I suppose this means don't cancel the delete because I said YES which the ee.DialogResult means I've pressed YES
            else
                e.Cancel = true;        // I suppose this should cancel the delete but he huh the delete was already performed.  What am I missing ?
        });
}

[Marc Roussel]

I found this thread : http://www.telerik.com/community/forums/silverlight/gridview/delete-confirmation-using-radwindow-confirm.aspx
Going to read the article then !

[Marc Roussel]

After reading the article,  I don't know why but I feel like there's a problem somehow.
How it comes to be called DELETING and yet the line is deleted even before I'm asking a confirmation in the Deleting event ?

It bugs me. 

[Marc Roussel]

I think I get it.  Here's my version.  Don't forget to add a reference to System.Windows.Data

private void rgvExpenses_Deleting(object sender, Telerik.Windows.Controls.GridViewDeletingEventArgs e)
{
    e.Cancel = true;

    RadWindow.Confirm("Certain ?", (s, ee) =>
    {
        if (ee.DialogResult.Value)
        {
            foreach (var Expense in e.Items)
                rgvExpenses.Items.Remove(Expense);

            e.Cancel = false;
        }
    });
}