I have discovered a weird issue in UWP app and I can reproduce it consistently with the following steps: A test app has two TextBox inputs on the page. For example: textBox1 and textBox2 with some texts. Set focus to textBox1 and cursor is in textBox1 open a text editor or any app with text you can copy from and the test app is not overlapped with the app you are switched to copy any text from the other app and pasted it to textBox2 directly. The trick is that you don't click in the textBox2 first, then paste the text. You need to do the following: Press and hold on the mouse's left key, and highlight whole text in textBox2. Then press Ctrl+v to paste the text. Mouse right click on textBox2 and select "Paste" from the context menu to paste text After the text is pasted to textBox2, you can only delete the characters, but can no longer enter any character. Switching focus away and back to textBox2 will resume the text input. I have added KeyDown event handler to log key events and see KeyDown events are received when the TextBox cannot add any entered keys. I can also reproduce this issue with the ContactCards sample project form UWP samples ( https://github.com/microsoft/Windows-universal-samples/tree/master/Samples/ContactCards ). Is this a known issue? Is there any workaround to fix the text input? Thanks in advance. Allen

[UWP] TextBox does not accept any key inputs after a text pasted

AllenLynx8 1

I have discovered a weird issue in UWP app and I can reproduce it consistently with the following steps:

A test app has two TextBox inputs on the page. For example: textBox1 and textBox2 with some texts.
Set focus to textBox1 and cursor is in textBox1
open a text editor or any app with text you can copy from and the test app is not overlapped with the app you are switched to
copy any text from the other app and pasted it to textBox2 directly. The trick is that you don't click in the textBox2 first, then paste the text. You need to do the following:
- Press and hold on the mouse's left key, and highlight whole text in textBox2. Then press Ctrl+v to paste the text.
- Mouse right click on textBox2 and select "Paste" from the context menu to paste text
After the text is pasted to textBox2, you can only delete the characters, but can no longer enter any character.
Switching focus away and back to textBox2 will resume the text input.

I have added KeyDown event handler to log key events and see KeyDown events are received when the TextBox cannot add any entered keys.

I can also reproduce this issue with the ContactCards sample project form UWP samples (https://github.com/microsoft/Windows-universal-samples/tree/master/Samples/ContactCards).

Is this a known issue? Is there any workaround to fix the text input?

Thanks in advance.

Allen

Richard Zhang-MSFT 6,936 Reputation points

2020-10-20T05:54:33.197+00:00

Hello @AllenLynx8 , I did not reproduce your problem. I hold down the left button to select all the text in the TextBox, execute Ctrl+V while holding down the left button, and continue to select Paste in the right-click menu, and the TextBox can continue to input later. My test environment is 19041 (system version), can you provide your current system version? If it is lower than 19041, the problem may be fixed in the new version.
AllenLynx8 1 Reputation point

2020-10-20T15:28:21.833+00:00
Hi @Richard Zhang-MSFT , my system version is 1909 (OS build: 18363.1139). Can you
please make sure the following conditions:

test app cannot be overlapped with the other app

TextBox to be pasted text to does not have focus

After copied any text from the other app, don't click on any place on the test app to gain focus but paste the text to the TextBox directly.

Thanks.
Allen
AllenLynx8 1 Reputation point

2020-10-20T16:05:29.793+00:00

Hi @Richard Zhang-MSFT , I just tested it with another laptop (Version 2004, OS build 19041.508) and was able to reproduce the same issue, but not easily. I could just use mouse right-click at the end of the TextBox to paste text from the context menu that could reproduce this issue.

Thanks
Allen
Richard Zhang-MSFT 6,936 Reputation points

2020-10-21T03:34:28.003+00:00

Hello @AllenLynx8 , I reproduced this problem, thank you for pointing it out. I will report this problem and if there is new progress, I will post it here.