Issue with TextBox.KeyUp event in a Telerik DataGrid

Huynh Than 65

I'm using an event attached to TextBox.KeyUp that looks like this. I'm using custom control with Handler/mapper approach. This is a native control that inherits from TextBox. User's image [RC:OCRed text]

private void TextBoxOnKeyUp(object sender, KeyRoutedEventArgs args)
{
if (args?. Key != VirtualKey-Enterl)
return;
｝
var cREntry = _entry;
if (cREntry. ReturnType == ReturnType.Next)
FocusManager. TryMoveFocus (FocusNavigationDirection. Next);
｝
else
if (cREntry.KeyboardAliveType != KeyboardAliveType.OnCompleted &&

This function does certain things when Enter key is pressed. However, it doesn't detect the Enter for some reasons. Other keys like Caplock, Numbers, etc. work just fine. Do you have any work-around for this issue? This affects my project a big deal because we rely heavily on the Enter key to allow users navigate.

Michael Taylor 53,896 Reputation points

2024-02-26T16:22:26.6533333+00:00

Have you debugged this code? Set a breakpoint on your if statement and then navigate in your app and trigger the call to the handler. If it doesn't hit the handler when you release the Enter key then it isn't a problem with this code. It could be that something else has focus or that it is getting handled further up the chain.

If the handler is getting called but the if statement is false then look at the value of Key and see why. Note that this is the mapped value so if you're doing mapping in your app the results could vary. Also confirm which key(s) work and which don't. For example the numeric keypad has an Enter key usually, does that not work but regular Enter key does? Look at the values being passed in each case to identify what scenarios you may need to handle.
Huynh Than 65 Reputation points

2024-02-26T17:09:17.93+00:00

The handler doesn't get called when the enter key, specifically, is pressed. I will see if there is something that occurs when pressing Enter that prevents it from reaching the KeyUp event.
Michael Taylor 53,896 Reputation points

2024-02-26T17:44:10.3+00:00

The Enter key normally triggers the default "OK" behavior when clicked and so it doesn't go to the control. You tagged this as MAUI but are you actually using MAUI for this? In MAUI there is an Entry control that defines a ReturnCOmmand that executes when the key is pressed.

For WPF you'd need to set the AcceptsReturn property to get notified.
Huynh Than 65 Reputation points

2024-02-27T16:47:46.7033333+00:00
Sorry for not adding more details. I'm using Telerik MAUI as a third party to build a data grid. Every cell of a data grid has basic functionalities such as editing, committing, and navigating to next cell of the same row when user hits enter.

I also found out that their control includes keyboard behavior automatically. Here is the post

https://docs.telerik.com/devtools/maui/controls/datagrid/keyboard-support#net-maui-datagrid-keyboard-support

=> Can this be the reason why the enter key can't reach the KeyUp event ? I know this falls beyond your scope of support. If you can give some workaround for this, I really appreciate that.
Michael Taylor 53,896 Reputation points

2024-02-27T17:24:37.6733333+00:00

Based upon the link then they are handling the Enter key so your handler won't get called by default. Just a quick search, that may or may not be correct, indicates you cannot currently override the keyboard behavior they have defined as identified here.
Rob Caplan - MSFT 5,442 Reputation points Microsoft Employee

2024-02-27T20:30:54.5166667+00:00

@Huynh Than I edited your title to match your clarifications and to add your code.

Please post code snippets, logs, and other text as text rather than as images. Images are inaccessable and difficult to work with (though not as impossible as they used to be now that OCR is more available!)It also helps if you edit new information into the question so it doesn't get lost in comments.

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Issue with TextBox.KeyUp event in a Telerik DataGrid

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