Is there a way to omit the (whatever) performed action on a button when the key is pressed? I already got some good inputs from SO and tried to catch the event via OnKeyPress or OnKeyDown - but I could not omit the Enter-action. I also liked the idea of disabling the Tabstop property, but as soon as I click the button the problem reoccurs.
OnKeyDown only seems to fire when "casual" keys (like a or z) are pressed, but not when Enter is hit. How can I detect it - when Enter is hit - on the button itself?
When you press ENTER inside a non-multiline field on a form with a default button set, the click event for this button is fired, like a click, not like a keyevent (keypress, keyup, keydown, etc).
Form.AcceptButton
Gets or sets the button on the form that is clicked when the user
presses the ENTER key.
If you don't want this behaviour (or want to prevent it), maybe you should remove it as the default button.
But if you need it to be default only in certain situations, you can bind/unbind it programatically:
form1.AcceptButton = btnSave;
form1.AcceptButton = null;
You can use : if(e.KeyCode == Keys.Enter){}
Check the Button.IsDefault property
Well, the fact that
When you press ENTER [...] the click event for this button is fired
made me think about the use of the OnMouseUp(MouseEventArgs e) method instead of OnClick(EventArgs e). I gave it a shot and it totally fits my requirements - plus: it gives me the opportunity to only exclude the wrapped buttons from said issue, not involving any other controls in my application (like Form.AcceptButton).
Thanks for all your input, which made me think about the issue from another perspective!
Related
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
I'm new on C#, I made a button which makes appear another button and I want to remove the click event of this new one and change it into an enter(key) event.
Code1
Code2
When the button appears it only works when I click it but no when I press Enter.
As to your question, https://learn.microsoft.com/en-us/dotnet/api/system.windows.forms.control.enter?view=net-5.0
The enter event is for when keyboard or mouse enter the control (button in this case).
From the sounds of your question, you are wanting to click the button when the 'Enter' key is pressed.
If this is WinForms, then you might actually want a property on the parent form called 'AcceptButton' (https://learn.microsoft.com/en-us/dotnet/api/system.windows.forms.form.acceptbutton?view=net-5.0). This will make it so anytime the Enter key is hit (with the exception of controls such as a RichTextBox that accepts the return key) that button will be clicked (course you still need the button click event for the button).
Although you seem to be doing something weird in your example code image, so I'm not sure that's the correct solution for it. Instead, you need to look at maybe the Keyboard events, such as KeyPress (https://learn.microsoft.com/en-us/dotnet/api/system.windows.forms.control.keypress?view=net-5.0). There are several: KeyDown, KeyPress, KeyUp, and PreviewKeyDown.
Note these events require Keyboard focus on the control in question. So if add them to the button you are creating in your example code, then that button will need keyboard focus to receive the keyboard events.
Also, just FYI, if a button has keyboard focus, by default the SpaceBar will click that button for you, while the Enter key is generally reserved for clicking the Form's AcceptButton.
as you can understand from the title that how to when you press Enter key the button automatically work, how to write code in c# for pressing Enter key instead of clicking on button?
Thank you!!
Is this WinForms? If so, you can set the AcceptButton of the form to be the button in question. Doing so will make pressing Enter behave exactly like clicking the button with the mouse, but it will only have that effect if the currently focused element isn't something else that will also capture the keypress.
I had been trying to solve the same problem. When a button had focus, hitting the enter key did not result in the KeyDown or KeyPress event firing. However, the KeyUp event fired. Problem solved.
private void CmdNoP_KeyUp(object sender, KeyEventArgs e) {
// I do not understand why this works
if (e.KeyCode == Keys.Return) {
cmdNoP_MouseClick(sender, null);
}
}
I believe, [space] is default key, which would "click" active button (or check checkbox and so on). You can always write method for events like OnKeyDown, OnKeyUp or similar. In these events you can check pushed key and do, whats clicking button is doing if this key is [enter].
For WPF set IsDefault="True" in XAML or use the button properties to set IsDefault checkbox.
I am writing an app where the user should be able to alter the action of a button.
The user should right-click a button, and choose an option from a pop-up context menu. Once the choice has been made the button will perform a different action when the user uses a normal click.
I've already gotten the "Click" event working for a normal button click, however the "MouseClick" event handler isn't working correctly.
The "MouseClick" event gets activated on regular left-clicks, but never get's called for right-click.
Is there some default event handling being performed that is ignoring that right-click?
I'm sorry to say that this would be a serious UI blooper. Perhaps it would make more sense to add a small combobox next to the button.
Perhaps something like this?
http://www.codeproject.com/KB/buttons/SplitButton.aspx
If you want to display a context menu with actions to choose from it should be enough to assign a ContextMenuStrip to the ContextMenuStrip property. There is usually no need to manually handle the mouse events for that.
surely it would be better to implement it on the MouseDown event rather than the MouseUp event. i dont understand how this is much different from MouseClick event
edit: Just tried this and it works a treat :)
In Button (and certain other controls), the MouseClick event is only fired for the left button. Refer to MSDN.
If you want to know about the right button, respond to the MouseUp event--though as other posters have pointed out, this isn't a great UI idiom.
Use the Mouse UP event... test that Button.X and Button.Y are within the size of the button otherwise you have moved the mouse away from the button.
Terry G
I have an asp.net TextBox in which I want to check if the text entered into the TextBox is > 0. It works once I tab out or click out of the TextBox, but if I keep focus on the TextBox, it won't fire the Text Changed Event, so I have the following scenario, I want to enable something if and only if the TextBox.Text.Length = 0. Now, if I put my caret in the TextBox and delete all the characters and then leave the caret in the TextBox so it still has focus and take my mouse and click a button, it will not do what it was supposed to do because it never fired the Text Changed Event. How would something like this be handled?
friend, keyup, keydown and keypress are your friends
The best idea is to write some client-side javascript to do what you want. The TextChanged event handler requires a postback to the server, and posting back to the server before a text box loses focus is impossible. Unless that is what you intend, I would suggest the former.
you can also use the setInterval javascript method to check for a change in the value of the textbox on a timed basis. just remember, you need to use the form name followed by control name and value to reference the control.
setInterval(MethodName, 100);
function MethodName()
{
if(formname.controlid.value.length > 0)
{
//do something here
{
}