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How to add DoubleClick event handler?

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Przemyslaw
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Przemyslaw asked on 18 Mar 2010, 10:54 AM
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

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Vlad
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answered on 18 Mar 2010, 11:02 AM
Hello,

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

All the best,
Vlad
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Przemyslaw
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answered on 18 Mar 2010, 11:26 AM
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
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Damian Slee
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answered on 18 Mar 2010, 04:15 PM
i am also getting a compile error expecting System.Windows.RoutedEvents?

the sample works, so is the example code wrong?

thanks
damian
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Pavel Pavlov
Telerik team
answered on 19 Mar 2010, 02:55 PM
Hi guys,

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

Best wishes,
Pavel Pavlov
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Przemyslaw
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answered on 19 Mar 2010, 04:46 PM
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
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Damian Slee
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answered on 19 Mar 2010, 05:04 PM
adding this fixed it for me.

using Telerik.Windows;
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Stefan Dobrev
Telerik team
answered on 23 Mar 2010, 02:31 PM
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
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Przemyslaw
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answered on 24 Mar 2010, 08:21 AM
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
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codeputer
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answered on 23 Apr 2011, 09:50 PM
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
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Pavel Pavlov
Telerik team
answered on 27 Apr 2011, 01:31 PM
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
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Przemyslaw
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Vlad
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Przemyslaw
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Damian Slee
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Pavel Pavlov
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Stefan Dobrev
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codeputer
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