How to add DoubleClick event handler?

[Przemyslaw]

Hi,

So far I have been using the MouseLeftButtonDownEvent to handle clicks within a gridview (for opening detail windows). Since Q1 2010 apparently supports DoubleClick event, I really would like to switch to that. This is what I have been using:

//In Constructor
AddHandler(GridViewCell.MouseLeftButtonDownEvent, new MouseButtonEventHandle(Cell_Clicked), true);

//Handler
private static void Cell_Clicked(object sender, MouseButtonEventArgs e)
{
    // ... Displaying details window
}

And this is something that I would like to use:

//In Constructor
AddHandler(GridViewCell.CellDoubleClickEvent, new SomeEventHandler(Cell_DoubleClicked), true);

//Handler
private static void Cell_DoubleClicked(object sender, SomeEventArgs e)
{
    // ... Displaying details window
}

However, what is the delegate EventHandler type that can/should be used here? What is the EventArgs type?

regards, Przemek

[Vlad]

Hello,

Please check this demo for more info:
http://demos.telerik.com/silverlight/#GridView/ClickEvents

All the best,
Vlad
the Telerik team

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items.

[Przemyslaw]

Hi,

thanks, I have started implementing what I have seen in the sample and I am experiencing the following compile time errors:

Error 1 The best overloaded method match for 'System.Windows.UIElement.AddHandler(System.Windows.RoutedEvent, System.Delegate, bool)' has some invalid arguments C:\Projects\Admin\Network_Admin\Network_Admin\content\administration\players\Player_AllPlayers_GridView.xaml.cs 30 13 Network_Admin

Error 2 Argument 1: cannot convert from 'Telerik.Windows.RoutedEvent' to 'System.Windows.RoutedEvent' C:\Projects\Admin\Network_Admin\Network_Admin\content\administration\players\Player_AllPlayers_GridView.xaml.cs 30 24 Network_Admin

for this call:

AddHandler(GridViewCell.CellDoubleClickEvent, new EventHandler<RadRoutedEventArgs>(Row_DoubleClicked), true);

Apparently AddHandler() method is expecting System.Windows.RoutedEvents and the CellDoubleClickEvent is of Telerik.Windows.RoutedEvent type.

What is wrong here?

Przemek

[Damian Slee]

i am also getting a compile error expecting System.Windows.RoutedEvents?

the sample works, so is the example code wrong?

thanks
damian

[Pavel Pavlov]

Hi guys,

I am attaching a sample project for your reference. Please check if you have the right "using" directives.

Best wishes,
Pavel Pavlov
the Telerik team

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items.

[Przemyslaw]

Thanks,

I have downloaded your sample. It compiled and then I didn't get anything on double click. As if the event didn't register. I am using Visual Studio 2010 RC.

In my project I think that I have all the proper references and usings. My AddHandler method still cannot be resolved with the telerik's extension method (see image). Of course I have a little different structure. Maybe that is the reason.

Przemek

[Damian Slee]

adding this fixed it for me.

using Telerik.Windows;

[Stefan Dobrev]

Yes,

This using is required in order for the C# compiler to resolve our extension method. Also note that you have to use this.AddHandler(...) or RadGridViewInstance.AddHandler(...) because this is an extension method.

Best wishes,
Stefan Dobrev
the Telerik team

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items.

[Przemyslaw]

Thanks Stefan.

That was it. The Extension was not picked up until I used *this* keyword. Now, the doubleclick event is working as it should be.

regards, Przemek

[codeputer]

How do you determine the RadGridViewColumn that was double clicked - in some cases the grid will go into edit mode if the column is not read only, and I want to avoid opening the detail form.

Why does the Grid not mark the event has handled if the double click goes into edit mode?

Thanks,
Richard

[Pavel Pavlov]

Hi Richard,

Yo can identify the column that was double clicked the following way :

this.AddHandler(GridViewCell.CellDoubleClickEvent, new EventHandler<RadRoutedEventArgs>((sender,args)=>
                {
                    MessageBox.Show("Column :" + ((GridViewCell)args.OriginalSource).Column.UniqueName);
                }
                ));

Greetings,
Pavel Pavlov
the Telerik team