Click here to Skip to main content
12,350,121 members (27,225 online)
Click here to Skip to main content
Add your own
alternative version

Tagged as

Stats

5.5K views
6 bookmarked
Posted

How to use key pressing on a form (Escape, Control and Help F1) (Windows and Linux)

, 4 Jul 2011 CPOL
Rate this:
Please Sign up or sign in to vote.
How to use key pressing on a form
There are various ways to use key pressing on a form using C#.
Here is an example:

Select properties of Form and select 'KeyPreview' and change it from 'false' to 'true'. By default, its value is false. Then write the below code in the KeyUp event of the Form:

public static string HelpPath = Application.StartupPath + Path.DirectorySeparatorChar + "Help" // Help Folder Name

// Folders Structure
// Exe File
//    |-> Help Folder
//            | -> HelpFile.chm

private void frmMain_KeyUp(object sender, KeyEventArgs e)
        {
            try
            {
                if (e.KeyCode == Keys.Escape) // Escape button
                {
                    This.Close;
                }
 
                if (e.KeyData == (Keys.Control  | Keys.S)) // Control + S
                {
                    if (boolIPWrite == true) // Permission to write
                    {
                        BtSave_Click(sender, e); // Save button
                    }
                }
 
                if (e.KeyCode == Keys.F1) // F1 - Help Information
                {
                    try
                    {
                        System.Diagnostics.Process.Start(strHelpPath + Path.DirectorySeparatorChar + System.Reflection.Assembly.GetExecutingAssembly().GetName().Name.ToString() + ".chm");
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show("ERROR # " + ex.Message.ToString() + Environment.NewLine + Environment.NewLine + strHelpPath + Path.DirectorySeparatorChar + System.Reflection.Assembly.GetExecutingAssembly().GetName().Name.ToString() + ".chm", this.Text.ToString(), MessageBoxButtons.OK, MessageBoxIcon.Warning);
                    }
                }
            }
            catch
            { }
        }



Note: Works in Windows and Linux (with mono installed).

License

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

Share

About the Author

Nelson Kosta Souto
Engineer
Portugal Portugal
My name is Nelson Souto, I develop software for fun and profit since 1992.

You may also be interested in...

Comments and Discussions

 
QuestionArticle? Hardly. Snippet at best. Pin
tlhintoq12-Jul-11 6:39
membertlhintoq12-Jul-11 6:39 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Praise Praise    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

| Advertise | Privacy | Terms of Use | Mobile
Web02 | 2.8.160621.1 | Last Updated 5 Jul 2011
Article Copyright 2011 by Nelson Kosta Souto
Everything else Copyright © CodeProject, 1999-2016
Layout: fixed | fluid