I have a very simple Windows Forms Application. And, in Windows (or, atleast Windows Forms Applications), when you press Enter while inside a Single-line TextBox Control, you hear a Ding. It's an unpleasent sound, that indicated you cannot enter a newline, because it is a single-line TextBox.
This is all fine. However, in my Form, I have 1 TextBox, and a Search Button. And I am allowing the user to Perform a search by pressing Enter after they've finished typing, so they don't have to use the mouse to click the Search Button.
But this Ding sound occurs. It's very annoying.
How can we make it so just that sound doesn't play at all in my Form?
#David H - Here's how I'm detecting the enter pressing:
private void textBox1_KeyUp(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
// Perform search now.
}
}
It works for me:
private void textBox1_KeyDown(object sender, KeyEventArgs e)
{
//Se apertou o enter
if (e.KeyCode == Keys.Enter)
{
//enter key is down
this.doSomething();
e.Handled = true;
e.SuppressKeyPress = true;
}
}
The SuppressKeyPress is the really trick. I hope that help you.
Check out the Form.AcceptButton property. You can use it to specify a default button for a form, in this case for pressing enter.
From the docs:
This property enables you to designate
a default action to occur when the
user presses the ENTER key in your
application. The button assigned to
this property must be an
IButtonControl that is on the current
form or located within a container on
the current form.
There is also a CancelButton property for when the user presses escape.
Try
textBox.KeyPress += new KeyPressEventHandler(keypressed);
private void keypressed(Object o, KeyPressEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
e.Handled = true; //this line will do the trick
}
}
Just add e.SuppressKeyPress = true; in your "if" statement.
private void textBox1_KeyUp(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
//If true, do not pass the key event to the underlying control.
e.SuppressKeyPress = true; //This will suppress the "ding" sound.*/
// Perform search now.
}
}
You can Use KeyPress instead of KeyUp or KeyDown its more efficient
and here's how to handle
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
if (e.KeyChar == (char)Keys.Enter)
{
e.Handled = true;
button1.PerformClick();
}
}
and say peace to the 'Ding'
Use SuppressKeyPress to stop continued processing of the keystroke after handling it.
public class EntryForm: Form
{
public EntryForm()
{
}
private void EntryTextBox_KeyDown(object sender, KeyEventArgs e)
{
if(e.KeyCode == Keys.Enter)
{
e.Handled = true;
e.SuppressKeyPress = true;
// do some stuff
}
else if(e.KeyCode == Keys.Escape)
{
e.Handled = true;
e.SuppressKeyPress = true;
// do some stuff
}
}
private void EntryTextBox_KeyUp(object sender, KeyEventArgs e)
{
if(e.KeyCode == Keys.Enter)
{
// do some stuff
}
else if(e.KeyCode == Keys.Escape)
{
// do some stuff
}
}
}
On WinForms the Enter key causes a Ding sound because the form property AcceptButton is not specified.
If you don't need an AcceptButton the ding sound can be suppressed by setting the form KeyPreview to true and enter the following KeyPress event:
private void Form_KeyPress(object sender, KeyPressEventArgs e)
{
if (e.KeyChar == '\r')
e.Handled = true;
}
No matter what control is active, there will be no more ding sound when pressing the Enter key. Since the key event proccessing order is KeyDown, KeyPress and KeyUp the Enter key will still work for the KeyDown events for the controls.
I stumbled on this post while trying to handle a KeyDown this worked for me.
If e.KeyCode = Keys.Enter Then
e.SuppressKeyPress = True
btnLogIn.PerformClick()
End If
Supressing the Key Press stops the event from being sent to the underlying control. This should work if you're manually handling everything that the enter key will be doing within that textbox. Sorry about the Visual Basic.
$("#txtSomething").keypress(function (e) {
if (e.which == 13) {
e.Handled = true; //This will prevent the "ding" sound
//Write the rest of your code
}
});
There is a very little chance anyone gets to this answer but some other answers are truly scary. Suppressing event on KeyDown kills 2 additional events in one strike. Setting e.Handled property to true is useless in this context.
The best way is to set Form.AcceptButton property to the actual Search Button.
There is also another way of utilizing Enter key - some people may want it to act as TAB button. To do that, add a new Button, set its Location property outside of the Form area (i.e. (-100, -100)) - setting Visible property to false may disable Button handlers in some cases. Set Form.AcceptButton property to your new button. In Click event handler add following code
this.SelectNextControl(ActiveControl, true, true, true, true)
Now, you may want to transfer focus only when focus it on TextBox you may want to either test ActiveControl type or use e.Supress property in event handlers of controls not meant to use Enter as TAB
That's it. You don't even need to capture e.KeyCode
Set your Search button's IsDefault property to true. This will make it a default button and it will be auto-clicked when Enter is pressed.
Well I lived with this problem long enough and looked it up here.
After thinking about this for quite some time and wanting the simplest way to fix it I came up with the easiest but not so elegant way to fix it.
Here is what I did.
Put 2 invisible buttons "Ok" and "Cancel" on the form.
Set the AcceptButton and CancelButton Property on the form to the invisible buttons.
Added no code to the buttons!
This solved all the secondary problems listed in this thread including the ToolStripMenu. My biggest complaint was the BindingNavigator, when I would enter a record number into the Current position to navigate to and pressed enter.
As per the original question in which the programmer wanted a search function when the enter button was pressed I simply put the search code in the invisible OK Button!
So far this seems to solve all problems but as we all know with Visual Studio, something will probably crop up.
The only other possible elegant way I could think of would be to write a new keystroke handling class which is way to much work for most of my projects.
You can set your textbox multi-line to true then handle the Enter key press.
private void yourForm_Load(object sender, EventArgs e)
{
textBox1.Multiline = true;
}
//then write your TextBox codes
private void textBox1_KeyUp(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
// doSomething();
}
}
i changed the textbox properties for an multiline textbox and it works for me.
Concerning the e.SuppressKeyPress = true; solution, it works fine by itself. Setting SuppressKeyPress to true also sets Handled to true, so there's no need to use e.Handled= true;
void RTextBox_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyData == Keys.Enter)
{
//do ...
bool temp = Multiline;
Multiline = true;
e.Handled = true;
Multiline = temp;
}
}
Related
I have an application in which I have implemented some keyboard shortcut keys for a given set of operations, some of these use ALT as a modifier e.g. ALT + 1. The functionality itself works fine however the system beeps during the key press.
I have read various posts that say I could use e.Handled in the KeyPress event however this is not helping in my scenario. The problem is easily replicated by creating a new Windows Forms application and running it without any modifications, pressing ALT + 1 for example will cause the system to beep.
I have noticed that other application such as Notepad have this behaviour too, if you launch Notepad and press ALT + J (or any other invalid menu keypress) the system will beep.
Is there any way to prevent the beep via my application or is it standard Windows behaviour?
You can Handle KeyDown Event and do something like this for Alt+1 But i suspect you might have to do this for all the invalid keys
private void keyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode >= Keys.D1 && e.Alt)
{
e.Handled = true;
e.SuppressKeyPress = true;
}
}
Can you try to use SuppressKeyPress in you KeyPress event management?
e.SuppressKeyPress = true;
I use Alt+E for editing a record under certain circumstances.
Here's what I had to do to eliminate the beep.
private void Object_KeyUp(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.E && e.Alt)
{
e.SuppressKeyPress = true;
}
}
private void Object_KeyUp(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.E && e.Alt)
{
e.SuppressKeyPress = true;
EditRecord(); // This opens a form for the editing process
}
}
Note: If you try to use EditRecord from Object_KeyDown and only SuppressKeyPress in Object_KeyUp, you will still get the beep.
I've 5 buttons in my windows application. When I click arrow keys the focus changing between buttons, then only
KeyUp
event firing. How to stop this?
Subscribe to the PreviewKeyDown event instead.
Occurs before the KeyDown event when a key is pressed while focus is on this control.
As you move through the buttons, the sender parameter will contain the previously selected button.
I found a solution that should work for you, adapted from here. Apparently, MS made the decision that the arrow keys wouldn't trigger the KeyDown event, so you can't cancel them.
One workaround is to specify that your arrow keys are normal input keys, like any other key. Then the KeyDown event will fire and you can cancel the button press if you want.
private void button1_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e)
{
if (e.KeyCode == Keys.Left || e.KeyCode == Keys.Right || e.KeyCode == Keys.Up || e.KeyCode == Keys.Down)
e.IsInputKey = true;
}
private void button1_KeyDown(object sender, KeyEventArgs e)
{
e.Handled = true;
}
You may want to read the other answers and comments in that post to see what would work best in your situation.
Answer for your question in comment
void button1_LostFocus(object sender, EventArgs e)
{
button1.Focus();
}
To prevent Up from moving focus from a Button you have to utilize at least 3 methods:
bool _focus;
private void button1_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e)
{
if (e.KeyCode == Keys.Up)
_focus = true;
}
private void button1_KeyUp(object sender, KeyEventArgs e)
{
_focus = false;
}
private void button1_Leave(object sender, EventArgs e)
{
if(_focus)
button1.Focus(); // or (sender as Control)
}
Trick is to use flag when user press Up and to return focus in Leave. You have to unflag in KeyUp, otherwise it would be impossible to change focus (by pressing Tab to example).
You could possible unflag in Leave, I didn't test it.
The lead developer says that when he uses my app, his keyboard beeps when he moves between TextBoxes on the TableLayoutPanel via the directional arrow keys.
However, I hear no such aural activity.
Here's my code:
// Had to intercept Up and Down arrows from Windows
private void textBoxPlatypi_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e) {
TextBox tb = (TextBox)sender;
if (e.KeyCode.Equals(Keys.Up)) {
SetFocusOneRowUp(tb.Name);
return;
}
if (e.KeyCode.Equals(Keys.Down)) {
SetFocusOneRowDown(tb.Name);
return;
}
}
private void textBoxPlatypi_KeyDown(object sender, KeyEventArgs e) {
TextBox tb = (TextBox)sender;
if (e.KeyCode.Equals(Keys.Left)) {
SetFocusOneColumnBack(tb.Name);
e.Handled = true;
return;
}
if (e.KeyCode.Equals(Keys.Right)) {
SetFocusOneColumnForward(tb.Name);
e.Handled = true;
return;
}
}
..He thought maybe I needed "e.Handled" but that is not available in the PreviewKeyDown event.
Is there a way to suppress the beeping (which apparently occurs only with certain keyboards or specific setups (he's using Windows7, I'm on XP still))?
UPDATE
I've got this code now:
private void textBoxPlatypus1_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e) {
switch (e.KeyCode) {
case Keys.Down:
case Keys.Up:
e.IsInputKey = true;
break;
}
}
private void textBoxPlatypus1_KeyDown(object sender, KeyEventArgs e) {
TextBox tb = (TextBox)sender;
if (e.KeyCode.Equals(Keys.Up)) {
SetFocusOneRowUp(tb.Name);
e.Handled = true;
return;
}
if (e.KeyCode.Equals(Keys.Down)) {
SetFocusOneRowDown(tb.Name);
e.Handled = true;
return;
}
if (e.KeyCode.Equals(Keys.Left)) {
SetFocusOneColumnBack(tb.Name);
e.Handled = true;
return;
}
if (e.KeyCode.Equals(Keys.Right)) {
SetFocusOneColumnForward(tb.Name);
e.Handled = true;
return;
}
}
...but he still hears the beeping (I don't).
He's in Alaska and using Windows 7; I'm in California and using XP. I don't know if some combination/mismatch there is the problem...
UPDATED AGAIN
I know this may be shocking to some, but the Alaska/California disconnection has nothing to do with it. I'm now hearing the beeps, too, and it's not from the arrow keys. It's when a value is entered in a TextBox and then, if that text box already has a character, focus is moved to the next textBox and the value is entered there (this is my code that causes this to happen). But the irritating beeping seems to be random - I haven't figured out the pattern for when it beeps (sometimes it does, sometimes it doesn't)...has anybody ever run across anything like that, or, better yet, know how to suppress the beep? All I'm doing is pressing either the "1" or the "2" key above the keyboard.
There is no way in the PreviewKeyDownEvent to Handle / Supress a KeyEvent like there is in the normal KeyDown Event. What the documentation suggests is to set the PreviewKeyDownEventArgs.IsInputKey property to true in order to handle key presses that are not available normally in the KeyDown Event.
From above Link, they are using a button as an example:
Some key presses, such as the TAB, RETURN, ESC, and arrow keys, are typically ignored by some controls because they are not considered input key presses... By handling the PreviewKeyDown event for a Button and setting the IsInputKey property to true, you can raise the KeyDown event when the arrow keys are pressed. However, if you handle the arrow keys, the focus will no longer move to the previous or next control.
Try this:
e.SuppressKeyPress = true;
When the user is entering a number into a text box, I would like them to be able to press Enter and simulate pressing an Update button elsewhere on the form. I have looked this up several places online, and this seems to be the code I want, but it's not working. When data has been put in the text box and Enter is pressed, all I get is a ding. What am I doing wrong? (Visual Studio 2008)
private void tbxMod_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
btnMod.PerformClick();
}
}
Are you sure the click on the button isn't performed ? I just did a test, it works fine for me. And here's the way to prevent the "ding" sound :
private void tbxMod_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
btnMod.PerformClick();
e.SuppressKeyPress = true;
}
}
A few thoughts:
does the form have an accept-button (set on the Form) that might be stealing ret
does the textbox have validation enabled and it failing? try turning that off
does something have key-preview enabled?
Under "Properties" of the Form. Category (Misc) has the following options:
AcceptButton, CancelButton, KeyPreview, & ToolTip.
Setting the AcceptButton to the button you want to have clicked when you press the Enter key should do the trick.
Set e.Handled to true immediately after the line btnMod.PerformClick();.
Hope this helps.
I had to combine Thomas' answer and Marc's. I did have an AcceptButton set on the form so I had to do all of this:
private void tbxMod_Enter(object sender, EventArgs e)
{
AcceptButton = null;
}
private void tbxMod_Leave(object sender, EventArgs e)
{
AcceptButton = buttonOK;
}
private void tbxMod_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
// Click your button here or whatever
e.Handled = true;
}
}
I used t0mm13b's e.Handled, though Thomas' e.SuppressKeyPress seems to work as well. I'm not sure what the difference might be.
form properties > set KeyPreview to true
The simple code below works just fine (hitting the Enter key while in textBoxPlatypusNumber displays "UpdatePlatypusGrid() entered"); the form's KeyPreview is set to false:
private void textBoxPlatypusNumber_KeyDown(object sender, KeyEventArgs e) {
if (e.KeyCode == Keys.Enter)
{
UpdatePlatypusGrid();
}
}
private void UpdatePlatypusGrid()
{
MessageBox.Show("UpdatePlatypusGrid() entered");
}
I've several textboxes. I would like to make the Enter button act as Tab. So that when I will be in one textbox, pressing Enter will move me to the next one. Could you please tell me how to implement this approach without adding any code inside textbox class (no override and so on if possible)?
Here is the code that I usually use.
It must be on KeyDown event.
if (e.KeyData == Keys.Enter)
{
e.SuppressKeyPress = true;
SelectNextControl(ActiveControl, true, true, true, true);
}
UPDATE
Other way is sending "TAB" key! And overriding the method make it so easier :)
protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
if (keyData == (Keys.Enter))
{
SendKeys.Send("{TAB}");
}
return base.ProcessCmdKey(ref msg, keyData);
}
You can write on the keyDown of any control:
if (e.KeyCode == Keys.Enter)
{
if (this.GetNextControl(ActiveControl, true) != null)
{
e.Handled = true;
this.GetNextControl(ActiveControl, true).Focus();
}
}
GetNextControl doesn't work on Vista.
To make it work with Vista you will need to use the code below to replace the this.GetNextControl...:
System.Windows.Forms.SendKeys.Send("{TAB}");
You don't need to make an "enter event handler"
All you need to do is make a "central" KeyDown event:
example
private void General_KeyDown(object sender, KeyPressEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
if (this.GetNextControl(ActiveControl, true) != null)
{
e.Handled = true;
this.GetNextControl(ActiveControl, true).Focus();
}
}
}
Then all you have to do is go to designer select all textboxes you wish to cycle through with EnterKey (select them by holding down Ctrl and clicking on textbox with the mouse) then go to Events(thunder like button), search Keydown event and type inside General_KeyDown. Now all your selected Textboxes will have the same keydown event :) This makes everything muuuuch much easier, cause imagine a form with 100 textboxes and you want to cycle through all with enter.... making an apart event for each texbox is... well not a proper way to make a program, it ain't neat. Hope it helped!!
Blockquote
This worked for me
if (e.Key == Key.Enter)
((TextBox)sender).MoveFocus(new TraversalRequest(new FocusNavigationDirection()));
It is important to note that if you will get an annoying "ding" or warning sound each time that the control is expecting an associated button control and e.Handled = true isn't always the answer to rid yourself of the noise/sound/ding.
If the control (i.e. single-line textbox) is expecting an associated button to 'ENTER' your entry, then you must also deal with the 'missing' control.
e.Handled = e.SuppressKeyPress = true;
This may be helpful when getting rid of the 'ding' sound.
For what it's worth- in my circumstance my users needed to use the "ENTER KEY" as we were transitioning from a terminal/green-screen application to a windows app and they were more used to "ENTER-ing" through fields rather than tabbing.
All these methods worked but still kept the annoying sound until I added e.SuppressKeyPress.
If you define Tab Order of all controls and make Form.KeyPreview = True, only need this:
Private Sub frmStart_KeyDown(sender As Object, e As KeyEventArgs) Handles Me.KeyDown
If e.KeyCode = Keys.Enter Then
System.Windows.Forms.SendKeys.Send("{TAB}")
End If
End Sub
I use this code in one of the text box keydown event
if (e.KeyData == Keys.Enter)
{
e.SuppressKeyPress = true;
SelectNextControl(ActiveControl, true, true, true, true);
}
Unable handle this keydown event for all text boxes in my form. Suggest something. Thanks
I don't do it at the form level. I create a single method that I share across all my inputs KeyDown event that I want to do this with (with one exception):
private void alltextBoxes_KeyDown(object sender, KeyEventArgs e)
{
try
{
if (e.KeyCode == Keys.Enter)
{
e.SuppressKeyPress = true;
SelectNextControl(ActiveControl, true, true, true, true);
}
}
catch
{
}
}
If I'm writing a control that I want to use in other applications, I give the last input its own method like this:
private void lastinput_KeyDown(object sender, KeyEventArgs e)
{
try
{
if (e.KeyCode == Keys.Enter)
{
e.SuppressKeyPress = true;
System.Windows.Forms.SendKeys.Send("{TAB}");
}
}
catch
{
}
}
Otherwise, the control just loops inside itself when you try to run it in another project. You could use the second way everywhere but I think the 1st is the preferred way.
For those of you that code in vb...
Public Class NoReturnTextBox
Inherits System.Windows.Forms.TextBox
Const CARRIAGE_RETURN As Char = Chr(13)
' Trap for return key....
Private Sub NoReturnTextBox_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Me.KeyPress
If e.KeyChar = CARRIAGE_RETURN Then
e.Handled = True
System.Windows.Forms.SendKeys.Send(vbTab)
End If
End Sub
End Class
This is the solution I use for VB.NET
Set Keypreview=True in your form properties.
Put this code in form keydown event:
If (e.KeyData = Keys.Enter) Then
'for any multiline control, you have to exit to let multiline 'textbox intro 'keypressing makes line skips.
If ActiveControl.Name = txtMyMutilineTextBox.Name Then Exit Sub
e.SuppressKeyPress = True
SelectNextControl(ActiveControl, True, True, True, True)
End If
Enjoy !!!!
Xabier Aberasturi Larruzea
This is better because when enter u can do focus the next tab.. U need setting TAB Order first
protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
if (keyData == (Keys.Enter))
{
SelectNextControl(ActiveControl, true, true, true, true);
}
return base.ProcessCmdKey(ref msg, keyData);
}
Taking a wild guess:
// on enter event handler
parentForm.GetNextControl().Focus();
I would combine what Pharabus and arul answered like this:
private void textBox_KeyPress(object sender, KeyPressEventArgs e)
{
if (e.KeyChar == ‘\r’)
{
e.Handled = true;
parentForm.GetNextControl().Focus()
}
}
Let me know if this helps! JFV