I am developing an app in C# with Visual Studio using Windows Forms
I have a ComboxBox and I would like to enable the Ctrl+C shortcut.
Right now it does not work (the selected text is simply not copied to the clipboard)
With a TextBox I simply need to set ShortcutEnabled to true, but this property does not seem to exist for ComboBox
Appearently it is what the guy in there tries to do but I don't undersand what he means.
MSDN does not elaborate much on how to do..
Shall I try to manually catch the shortcut in the
private void mycomboboxname_KeyDown(object sender, KeyEventArgs e)
method ?
That seems to me like an overkill... I looked here but did not understood it well (I can't find the IsEditable property when designing the form)
Any ideas welcome...
Hans Passant answer is right.
The key presses were simply intercepted (and prevented somewhere else in my code).
Related
i am using the MVVM pattern with WPF and Prism (unity). I have a tool which is reading a barcode scanned by a user and depending on what kind of barcode is scanned the tool is doing some stuff. Right now i have a textbox which is binded to a property. I would like to fill my property in the viewmodel with the content of the scanned barcode without using a textbox or similar. I would like to fill the property directly. Is there a way to do this? Or maybe someone have an idea how i could solve that problem?
kind regards
According to your comments, what you'll want to do is handle the keydown event.
Have a read here: code project scanner reader . He did what you want, and show what / where to handle :)
Edit:
I've answered another key events question that might be relevant. Feel free to have a look at my other answer , it discusses i:interaction and InputBindings , and points in return to another article about handling key events: up/down on datepicker, and discusses the code behind / mvvm approaches.
Hope you'll find them useful.
Well, I'm not sure I'm getting it in the right way, but you can catch all keyboard input with EventManager.
EventManager.RegisterClassHandler(typeof(Window),
Keyboard.KeyUpEvent,new KeyEventHandler(keyUp), true);
private void keyUp(object sender, KeyEventArgs e)
{
if(e.Key == Key.OemComma)
MessageBox.Show("Gotcha");
}
Another option is to create a read only textbox, but it's more or less same as you have now.
I have a simple search field on a form that is set as multiline (which I understand is the only way to change a text box's height) and has the flag AcceptsReturn set to false.
However, when I press enter within that control, instead of it activating the default button as it should, it puts in a return character.
Now, I've also attempted using the KeyPress event to check if the Enter key has been pressed to activate the search-button click function in the hope that it would override this return behaviour - but it hasn't. Now it just runs the search AND inserts a return character.
I'm running Visual Studio 2010 (although this problem seemed to be present in 2008 too before I converted it) and C# .NET 2.0. Any solutions?
I see that an answer has already been posted, which mentions the AcceptButton property, but I figure I would state more clearly why that's necessary: quoth MSDN, on AcceptsReturn, "If there is no default button for the form, the ENTER key will always create a new line of text in the control, regardless of the value of this property." (I just tried it out on a dummy form - by "default button", they did in fact mean the form's AcceptButton property. With one set, the value of AcceptsReturn made a difference; without one, it had no effect.)
As for KeyPress, while that is obviously not the best way in this case, I have had to use tricks like that in the past - did you remember to set e.Handled to true in the case that you handled the event yourself?
The form has a property called AcceptButton. Is that pointing to the button you are calling the default button?
I just wrote a little test and it seems to work for me.
I am developing the Internet Explorer Toolbar in c#.net using the band objects.
Now in my toolbar, I am using the textbox field to make the search enable, but in this textbox field, I am not able to use the backspace, delete, arrow keys and many other such button.
I am not sure about y I am not able to use this. Please help me about this. I found many question posted over like this, but none of them was having the specific answer.
Thanks
The problem is that the browser is eating the events for those keystrokes, so the solution is to force focus to the toolbar when the text box receives focus.
To fix it add this line to your toolbar's constructor:
yourTextBox.GotFocus += (sender, args) => OnGotFocus(args);
Also make sure you have implemented TranslateAcceleratorIO() per this example.
Compare your code to this one and see what's missing.
I have several textboxes on a windows form.
I can't paste text into any of them using CTRL-V, though I can still right click and select paste. This is pretty annoying.
I have tried this with the form's KeyPreview as both true and false. TextBox.ShortcutsEnabled is also true.
Check to see if you have a menu on the form with a shortcut for Ctrl-V.
The following code should help:
private void textBox1_KeyUp(object sender, KeyEventArgs e) {
if (e.KeyData == Keys.V && e.Modifiers == Keys.Control)
(sender as Textbox).Paste();
}
The code you posted has nothing to do with your Ctrl + V problem, that is for certain. Not much else I can tell you unless you post some more code.
Special code should not be needed for Ctrl + V, but one guess I have is to make sure you have YourTextBoxId.ShortcutsEnabled set to True.
Yeah.. I know this is answered but I thought I'd throw my 2cents in just for fun. I also had a similar problem. Setting the TextBox.ShortcutsEnabled value to True did nothing for me. I was surprised to see the note left by Microsoft here: http://msdn.microsoft.com/en-us/library/system.windows.forms.textboxbase.shortcutsenabled.aspx regarding this issue. Quite interesting to say the least.
Given that, I just implemented the functionality through the key even handlers as indicated in the post by Webleeuw.
I was also going thru with the same problem. after a lot of googling finally I found the solution. It is because in the aplliciation ctrl+v shortcut was already defined(Edit menu-> Paste). After removing this...it work fine for me....Hope that it helps....
The TextBox control does not support the CTRL+A shortcut key when the Multiline property value is true.
Go to properties for the control:
Properties>Behaviour>Shortcuts Enabled = true
job done - will now accept default windows shortcut strokes for this control
Go to TextBox Properties->Behavior->Allow Drop SET TRUE.
You can comment already assigned same shortcut to other control, from designer.cs/.vb form of your form.
In my case I solved it for menu in following way
//this.copyToolStripMenuItem.ShortcutKeys = ((System.Windows.Forms.Keys)
((System.Windows.Forms.Keys.Control | System.Windows.Forms.Keys.C)));
Simplifying
I have a text box and a button
The button just create an messagebox with the text from the textbox.
But i change the value of the textbox, the new value apears (Ex: Type 123) but the message box does not show the value.
If i try to use the value in the programming (get the value by textbox1.text) the variable has nothing ( textbox1.text = "") but i can still see what i typed in the form.
Anyone has any clue?
Your button's click event handler should look something like this
private void button_Click(object sender, EventArgs e)
{
MessageBox.Show(textBox.Text);
}
I suspect you already have code similar to this and that at some point the textbox is cleared or otherwise set to String.Emppty but without seeing actual code it is difficult to help you
When/where did you check the value of textBox1.Text? If you're checking it in the constructor, Form1_Load, or anything else that occurs before you'll have typed text, you will get an empty value.
To properly check the value of textBox1.Text, you should set what's called a breakpoint on the line that calls MessageBox.Show(textBox1.Text). To do this, click in the grey area of the source editor (it's on the far left) on the line containing MessageBox.Show(..). A red circle will appear and your code should be highlighted. When you run your application and click on your button, your application should pause and Visual Studio will highlight that line and from here you can hover over "textBox1.Text" in the MessageBox.Show() line and it should show you the current value.
If your application is as simple as a form, a textbox, and your button1_Clicked event handling code, this should work no problem. If it is not this simple, then you need to look for anything that sets the value of the textBox in your code and make sure it isn't passing any blank values by using breakpoints.
To solve this properly, though, we really need more information.
Thanks Eric and Crippledsmurf. As both of you said, its hard to help without the code.
The problem I found is that when calling the form, I send some objects by reference, so I can track them down and I found that when (don't ask me why it happens that way, I'm still working on it) the construtor is called he make an new component, so the component in the interface no longer represents the one pointed by the variable "textbox1" (Yes Crash893, I haven't mispelled the name).
I found that I was making some mess with the references, and probably that was causing the problem. I fixed the problem by changing the actions performed by references for delegates and events, but I couldn't track down the exactly source of the problem.
Thanks, again, everyone for the insights.