在C＃中动态创建Winform的Keypress事件

Question

I'm creating a windows form at run-time. Now i want the Key-press event to be triggered for the dynamically created form. How do i create/bind the event to newly/dynamically created windows form in C#.

Thanks,

Answer 1

Try This.

Form dynamicForm = new Form();

dynamicForm.KeyPress += new KeyEventHandler(onkeyPress);    


 void onkeyPress(object sender, KeyEventArgs e)
 {
        Console.WriteLine("test");
 }

Answer 2

If we take a text box its like this.

    private void Form1_Load(object sender, EventArgs e)
    {
        TextBox myTextBox = new TextBox();
        myTextBox.KeyPress += new KeyPressEventHandler(myTextBox_KeyPress);

        this.Controls.Add(myTextBox);
    }

    void myTextBox_KeyPress(object sender, KeyPressEventArgs e)
    {
        //Do Key press event work here
    }

UPDATE

Make sure that the focus should be on Form2 .

Answer 3

Make sure the forms KeyPreview Property is set to true, that way it will see the keystrokes.

From above link:

When this property is set to true, the form will receive all KeyPress, KeyDown, and KeyUp events. After the form's event handlers have completed processing the keystroke, the keystroke is then assigned to the control with focus. For example, if the KeyPreview property is set to true and the currently selected control is a TextBox, after the keystroke is handled by the event handlers of the form the TextBox control will receive the key that was pressed. 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.

So you will want to do something like this:

public partial class Form1 : Form
{
    Form2 f2;
    public Form1()
    {
        InitializeComponent();
        KeyPreview = true;
        KeyDown += Form1_KeyDown;
    }

    void Form1_KeyDown(object sender, KeyEventArgs e)
    {
        if(e.Control)
        {
            switch(e.KeyCode)
            {
                case Keys.C:
                    MessageBox.Show("Cntrl C");
                    break;
                case Keys.V:
                    MessageBox.Show("Cntrl V");
                    break;
                default:
                    break;
            }
        }
    }
}