C# Keydown or keycode not working

Question

5.00/5 (1 vote)

See more:

this is my code

C#

private void Form1_KeyDown(object sender, KeyEventArgs e)
     {
if (e.KeyCode == Keys.F3)
         {
             Label intervillabel = new Label();
             intervillabel.Text = numericUpDown1.Value.ToString();
             intervillabel.Location = new Point(BeatDetector.Location.X, 10);
             intervillabel.Visible = true;

             panel1.Controls.Add(intervillabel);
         }
     }

the error is, nothing happens,l ive tried every key

Posted 30-Apr-12 22:14pm

C.CoderCreator

Updated 26-Nov-22 9:31am

Add a Solution

3 solutions

Solution 2

in the IntializeComponent() method set:
this.KeyPreview = true;

Regards,
Akaas Developer

Posted 30-Apr-12 22:36pm

Akaas developer

Updated 1-May-12 1:14am

v2

Comments

Pete O'Hanlon 1-May-12 6:31am

Please remove the link - if you do not, I will have no choice but to have you removed as a spammer, and remove all your answers. As it looks like you are genuinely trying to answer here, I don't want to go with this option, but I will do so if I have to.

Member 12101808 19-Dec-15 10:01am

what a joke!! that guy tried to be nice and provide a resource and you want to threaten him with being marked as a spammer WOW. talk about being a scared cat. why don't you get on to users who should be marked as spammers and leave the good people alone. Oh go ahead give me a warning it wont bother me I sure wont loose any sleep over this stupid site

Pete O'Hanlon 19-Dec-15 10:44am

If you look, you'll see that this answer has been edited. His or her first answer included a spam link pointing to some completely unrelated item. If you look here you can see the original answer: http://www.codeproject.com/script/Answers/EntryVersion.aspx?aid=376438&av=550454

Solution 3

Do check ur your designer.cs (you can find this file under Form1.cs if Form1 is the name of the form ~~u've~~ you've given) file and check whether the eventhandler is associated with this event or not!!!
Because to fire an event there must be handler for it which is associted with the event in designer.cs file

Mark as solved if ~~u've~~ you've got the solution
Thanks...

Posted 1-May-12 0:01am

preet88

Updated 2-May-12 2:59am

v2

Comments

Shahin Khorshidnia 2-May-12 9:03am

It's very nice that you want to help. Thank you.
But, Please do not use sms words like "u", "ur", "u've" and... You have enough time to type them like "you", "your", "you've".
And if I were you I'd use bold for titles and a very important word not for the whole of the answer. (Thank you)

preet88 4-May-12 1:28am

thanks for your suggestions.

Shahin Khorshidnia 4-May-12 5:17am

You're welcome :)

BillW33 2-May-12 9:11am

@Shahin, +5 for your comment. :)

Shahin Khorshidnia 4-May-12 5:16am

Thank you :)

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

VJ Reddy · Accepted Answer · 2012-04-30T22:24:00

The reason is that when a key is pressed it will go to the control which has focus on the form, as the KeyPreview property of Form is set to False by default. Let us say the cursor is in a TextBox. Now, if the F3 key is pressed it will not go to the Form's KeyDown event and instead it is captured by the TextBox and the KeyDown event of TextBox fires.

So, to enable the KeyDown event of Form even when the focus is on any other control, then the KeyPreview property of the Form has to be set to true as explained here
http://msdn.microsoft.com/en-us/library/system.windows.forms.form.keypreview.aspx[^]
KeyPreview Gets or sets a value indicating whether the form will receive key events before the event is passed to the control that has focus.
and under remarks as
To handle keyboard events only at the form level and not allow controls to receive keyboard events, set the KeyPressEventArgs.Handled property in your form's KeyPress event handler to true.

After setting KeyPreview property the Form's KeyDown event will fire first, then the KeyDown event of the control which has focus will be fired if the KeyPressEventArgs.Handled is not set to true as stated above.