I have a user that want to be able to select a textbox and have the current text selected so that he doesn't have to highlight it all in order to change the contents.
The contents need to be handle when enter is pushed. That part I think I have figured out but any suggestions would be welcome.
The part I need help with is that once enter has been pushed, any entry into the textbox should clear the contents again.
Edit: The textbox controls an piece of RF hardware. What the user wants to be able to do is enter a setting and press enter. The setting is sent to the hardware. Without doing anything else the user wants to be able to type in a new setting and press enter again.
Hook into the KeyPress event on the TextBox, and when it encounters the Enter key, run your hardware setting code, and then highlight the full text of the textbox again (see below) - Windows will take care of clearing the text with the next keystroke for you.
TextBox1.Select(0, TextBox1.Text.Length);
OK, are you sure that is wise? I am picturing two scenarios here:
There is a default button on the form, which is "clicked" when enter is pushed".
There is no default button, and you want the user to have to press enter, regardless.
Both of these raise the same questions:
Is there any validation that is taking place on the text?
Why not create a user control to encapsulate this logic?
If you know the enter button is being pushed and consumed fine, how are you having problems with TextBoxName.Text = string.Empty ?
Also, as a polite note, can you please try and break up your question a bit? One big block is a bit of a pain to read..
Related
Throughout the app I need to use ENTER to advance to next control (same as Tab), and I do that by using EventManager.RegisterClassHandler, KeyDownEvent for textboxes in Application_Startup. But for one particular textbox (which is the input for a barcode scanner), I want to keep the focus to allow multiple scannings. So it has to receive a number, process it, then clear the box and keep the focus for the next read. Barcode reader is automatically sending an ENTER at the end of a read. Textbox must still be able to lose focus by user's choice (like mouse clicking in another box)
Explicitly handle the PreviewKeyDown on that box and set Handled to true on the event arguments. It executes before any KeyDown handlers.
Using c# winforms vs2008
I'm using a TabControl on a form. Each tab has a different set of input fields. Some of those fields has to be completed. Such as Username. Multiple users will use the same PC, so a the username must remain static. I have a leave event on the require fields which triggers when the textbox loses focus to check if a value was added. In the case of Username, a popup would then presents possible values. That works pretty awesome to ensure accuracy and speed. To problem comes in when the user clicks on another tab, the textbox leave event triggers. How can I prevent the leave_event code from running if the focus changes to a control not on the current Tab?
I have tried different event handlers, but the leave event seem to occur first. I tried textbox validating event handler, but also no success. I tried adding a If-statement in front of the code to check the tab number, or tabcontrol state - no joy - as before anything else changes, the leave event fires.
The only remaining thing I can think of is to loop through all the controls on the tab to check if they have focus, but that just feels messy.
Any other suggestions?
I have found a partial solution. Using a Mouse_Enter and _Leave event on the tab, I set a flag to determine whether the mouse was clicked in the form or outside. If the flag is set to false, the leave event dont run. This will not solve short cut key presses though. But that I can handle later.
Im trying to create a basic example sign up page.
I want the mouse pointer to enter the textbox only on click however it seems to enter the first textbox by default. What is the process to change this?
You could use the opacity and sets it to 0 together with the IsEnabled attribute which I would set to false.
Then you put in your click event this simple code.
textbox.Opacity="1";
textbox.IsEnabled="true";
I hope this helps you.
Is there a way to have both a textbox and a button in focus? I know that I can use textbox1.focus to focus the textbox, and same with the button, but is there a way to be able to have enter focus on the button, while still typing in the textbox?
I know that I can just use the key-press event to capture the enter key, but I'm wondering if I can have enter focus on the button.
Just curious to know if this is possible, a simple yes or no is all that's needed. Thanks!
Only one element can have input focus at a time. You can't specify the focus for just one key.
So basically, no, you can't do that.
You don't need to have focus on both controls to get the behavior (I assume) you want. Just set the parent form's or dialog's AcceptButton property to the button you are talking about; its Click event should be triggered when you press the ENTER key even while the TextBox has focus.
https://msdn.microsoft.com/en-us/library/system.windows.forms.form.acceptbutton.aspx
To make the answer complete (edit):
As stated above in my comment to your question (and likewise by other contributors): only one control can have focus at any given time. So, the answer to your original question is:
No, there is no way.
As Bradley said, you can't.
But for your aim, there is a shortcut, called Form.keypreview property, which let's you evaluate keys before they reach the textbox or other controls.
I have a small problem. I have a TextBox myTxt. I set the myTxt_Leave event to check the database if input value already exists. If value exists, I display a MessageBox and set myTxt.Focus(). That wont let user to leave this TextBox, until another value (which does not exist in the database) is input.
But here is the catch...I would like to allow user to click on Cancel button on the form even if the value does not change. Is that possible?
Hope someone understands what I wanted to tell.
Thank you for any help.
EDIT:
I decided to change the interface a little. I put red label under the textbox "Value already exists" and disabled the Submit button until the value is correct.
But still, I'm curious if solution for my previous problem is possible?
Instead of binding the event to the Leave interaction, just Highlight the box in red and disable the submit. When the when the error is resolved or the action is cancelled, clear the red / disabled submit button.