Develop Reference

How to remove focus from a button

I have a panel on which there is a button.But there is a problem. I need to use KeyEventHandler to catch the Enter press, the button is pressing, and the event is not processed. I tried artificially giving focus to Form, but it didn't help.If I don't add buttons, everything works fine. Can you tell me how to solve this?
I created a new project and tried: with the button, the Event is not called, and the button is pressed, without the button, the event is called.

you need to enable KeyPreview property of that form, to catch a KeyEventHandler. Also check that your AcceptButton property has correct value

C# Forms - Only the first of what should be two consecutive events triggers

I have a TextBox with a "Leave" event and a Button with a "Click" event. There is no code in either event handler.
If I place the cursor in the TextBox then leave it by clicking any other item, the "Leave" event triggers.
If I place the cursor anywhere except in the TextBox and click the Button, the "Click" event triggers.
However, if I click the Button with the cursor inside the TextBox, only the "Leave" event triggers.
How can I get both events to trigger in the third scenario?

Winforms control LostFocus event not firing when you click the form background

I have a custom ComboBox which opens a separate control when you click on the arrow of the ComboBox. I would like to call the 'LostFocus' event handler to close the custom control when you lose focus of the ComboBox.
This works fine if you click onto another control such as a text box, however doesn't fire if you click on the background of the form.
I want to mimic the functionality of when you click off and close the dropdown of a normal combobox.

Take a bool variable at Form level and make it true during combobox enter(GotFocus) event. InLeave(LostFocus)event ofcombobox, make itfalse`.
Subscribe to Form MouseClick event and check bool variable in this event. if true , call combobox leave event here.

Silverlight Textbox_LostFocus event not firing on Button_Click

I have one textbox and a Save Button in my silverlight. The validations for the textbox are in its lostFocus event. But if I enter something in the textbox and directly press the save button, the validation is not working. In other words, the lostfocus event is not raising in the button_click event. How can I do this ?

Call Focus() on the button. For instance, if your button's name is "MyButton", you may use MyButton.Focus() inside of it's click event.
I would also suggest that you simply call your textbox validation method inside of your button press event, then proceed only if all validations are successful.

Further Details on Vallidating Event not Working

I have created a custom control that inherit the TextBox, in that control i have override validating event and in validating event i have put validation that checks for the empty field.
Now when i use that control on my winform and when i click on save button it immediate fires save event.. the validation event of custom control fires and it displays the error message but still it does not stop the save event to fire....
the save button CauseValidation Property is set to true..
i have also put (this.ValidateChildren())
i have also put CancelEventArgs ce.Cancel = true; in Custom Textbox control
but neither working to stop the save event to fires..
i only want to fire Save event if Textbox is not empty.
validating event fires, shows message for empty field and immediate fires save event..
now if you got an idea then if you have solution then please provide solution..

Validating event of the textbox is fired only when cusor leaves that textbox. If you directly click on the save button, Validating event of the textbox will not be fired.
I think, on Save button you need to provide some validation to check if textbox is empty or not.
Hope this helps..