I have a combo box column with in the grid and i need an event for that combo box value changed .
I am unable to register a selection changed event for telerik:GridViewComboBoxColumn.
Suggest me how to do that.
Thanks,
Swathi.
You may add a handler for the SelectionChanged event as follows:
this.RadGridView1.AddHandler(RadComboBox.SelectionChangedEvent, new SelectionChangedEventHandler(OnSelectionChanged));
All the best,
the Telerik team
Browse the
videos here>>
to help you get started with RadControls for WPF
Thanks for the immediate response.I am able to register and use the event now.But i have few more queries.
1.Can i register the event for a particular column in a grid.right now i am putting a condition within the event.
2.This event is being called while loading also,which i think is not valid.Can u answer this?
Thanks in advance
Hello Swathi,
You need to define a condition in the OnSelectionChanged method if you want to fire the event only for a particular column. For example:
if (comboBox.SelectedValue == null || comboBox.SelectedValuePath != "Code") // we take action only if the continent combo is changed
As for your second question, indeed the event is fired while loading and so far this is the expected behavior.
Greetings,
the Telerik team
Browse the
videos here>>
to help you get started with RadControls for WPF
Please could you also provide a sample in VB, your converter is next to useless when dealing with events
Cheers
I have no idea how to implement the following in VB:
this.RadGridView1.AddHandler(RadComboBox.SelectionChangedEvent,
new SelectionChangedEventHandler(OnSelectionChanged));
The converter gives you this:
Me.RadGridView1.[AddHandler](RadComboBox.SelectionChangedEvent, New SelectionChangedEventHandler(OnSelectionChanged))
As with all addhandler conversions it is wrong, I have worked out how to modify a normal handler using the address of function but I cannot work out the syntax for how to handle one that is bound to a grid, it comes up with errors like, cannot use a lamda expression, must use addressof and radcombobox has no such event..
Cheers
Hadn't seen that blog post but I still get this error:
Error 3 Method 'Private Sub comboSelectionChanged(sender As Object, e As Telerik.Windows.RadRoutedEventArgs)' does not have a signature compatible with delegate 'Delegate Sub SelectionChangedEventHandler(sender As Object, e As Telerik.WinControls.UI.SelectionChangedEventArgs)'. C:\TFS_Trunk\BM Pallets\EMU\dashboard\admin\ucAdminAddresses.xaml.vb 29 101 dashboard
My other issue here is that I have spent countless hours as a VB developer trying to find work arounds to the c# code samples and documentation. Surely you as a company selling these controls for the same price as the c# users should provide equal documentation for both instead of making us VB users scrounge around in blog posts hoping that someone else has had the same issue previously. Just today I have wasted 2 hours on this and I've been having these same issues for around 3 years now, it equates to 'days' lost...!
Thank you for sharing your feedback.
For the VB programmers we offer this
online converter
. For the purpose of converting entire solutions, you can also consider using
Instant VB Converter
.
Also, as you run the
WPF demos
, the C# code can be converted into VB.NET code on demand (choosing the VB.NET tab for the code behind files).
Regards,
Dimitrina
Telerik
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I'm trying to add selectioin changed event in my GridViewComboboxColumn.
But, AddHandler does not exist.
I'm using Telerik UI for WinForms R2 2017 SP1.
Hello AungKo,
The
AddHandler
() method is part of the WPF framework. If you need to subscribe to a handler in WinForms I would suggest you take a look at the
MSDN docs.
Also, if for any questions related with Telerik UI for WinForms may I ask you to post your question in the
WinForms forum
or via the support ticketing system.
Regards,
Martin Ivanov
Progress Telerik
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I found this information helpful .. But I was wondering if it was possible to add the Even handler in XAML
Thanks
Hello Michael,
The event handler cannot be attached in XAML in this scenario. This is because the column doesn't expose the corresponding event. The AddHandler() method is used to globally attach the handler to all selector elements that expose SelectionChanged event.
An alternative approach to subscribe to the SelectioChanged event is to create a custom combobox column and override its CreateCellEditElement. There you can get the RadComboBox element and subscribe to its SelectionChanged event. Then raise a new custom event that you can use. Here is an example in code:
public
class
CustomGridViewComboBoxColumn : GridViewComboBoxColumn
public
event
EventHandler<SelectionChangedEventArgs> SelectionChanged;
public
override
FrameworkElement CreateCellEditElement(GridViewCell cell,
object
dataItem)
var comboBox = (RadComboBox)
base
.CreateCellEditElement(cell, dataItem);
Regards,
Martin Ivanov
Progress Telerik
Want to extend the target reach of your WPF applications, leveraging iOS, Android, and UWP?
Try UI for Xamarin
, a suite of polished and feature-rich components for the Xamarin framework, which allow you to write beautiful native mobile apps using a single shared C# codebase.
