C# .NET - Call Key Press Event In C#.net

Use below code to get the key press event. let me know if you need anything else.

using System; 
 
// Derive a custom EventArgs class that holds the key. 
class KeyEventArgs : EventArgs { 
  public char ch; 
} 
 
// Declare a delegate for an event.  
delegate void KeyHandler(object source, KeyEventArgs arg); 
 
// Declare a key-press event class. 
class KeyEvent { 
  public event KeyHandler KeyPress; 
 
  // This is called when a key is pressed. 
  public void OnKeyPress(char key) { 
    KeyEventArgs k = new KeyEventArgs(); 
   
    if(KeyPress != null) { 
      k.ch = key; 
      KeyPress(this, k); 
    } 
  } 
} 
 
// A class that receives key-press notifications. 
class ProcessKey { 
  public void keyhandler(object source, KeyEventArgs arg) { 
    Console.WriteLine("Received keystroke: " + arg.ch); 
  } 
} 
 
// Another class that receives key-press notifications. 
class CountKeys { 
  public int count = 0; 
 
  public void keyhandler(object source, KeyEventArgs arg) { 
    count++; 
  } 
} 
 
// Demonstrate KeyEvent. 
public class KeyEventDemo { 
  public static void Main() {  
    KeyEvent kevt = new KeyEvent(); 
    ProcessKey pk = new ProcessKey(); 
    CountKeys ck = new CountKeys(); 
    char ch; 
 
    kevt.KeyPress += new KeyHandler(pk.keyhandler); 
    kevt.KeyPress += new KeyHandler(ck.keyhandler); 
 
    Console.WriteLine("Enter some characters. " + 
                      "Enter a period to stop."); 
    do { 
      ch = (char) Console.Read(); 
      kevt.OnKeyPress(ch); 
    } while(ch != '.'); 
    Console.WriteLine(ck.count + " keys pressed."); 
  } 
}

There is also key down event. Have a look at http://msdn.microsoft.com/en-us/library/system.windows.forms.control.keypress.aspx

 This event occurs after the KeyDown event and can be used
' to prevent characters from entering the control.
Private Sub textBox1_KeyPress(sender As Object, e As System.Windows.Forms.KeyPressEventArgs) _
    Handles textBox1.KeyPress
    ' Check for the flag being set in the KeyDown event.
    If nonNumberEntered = True Then
        ' Stop the character from being entered into the control since it is non-numerical.
        e.Handled = True
    End If
End Sub 'textBox1_KeyPress

Just use this line in your button click event

private void button1_Click(object sender, EventArgs e)

    textBox1.KeyPress += new KeyPressEventHandler(textBox1_KeyPress);

use this

private void txtLocation_KeyPress(object sender, KeyPressEventArgs e)
{
if (e.KeyChar != (char)13)
e.Handled = true //filtering out all other keys except “Enter” key

else //if “enter” key is pressed
btnInstall_Click( ); //what arguments must be passed here?
}

private void btnInstall_click(object sender, EventArgs e)
{
}