CODEWITHSUNDEEP
c#.netwinforms
Rodrigo
Rodrigo

Reputation: 3

Use of Arrow Keys

What I want is something like this

By pressing the Arrow Key down, for example, button1 do the action of a click

ArrowKeyDown = button1.Click and by doing that click my image move all through my picturebox. and the same for going up, right andleft.

Upvotes: 0

Views: 3340

Answers (2)

spajce
spajce

Reputation: 7082

You're trying to use the Form.KeyPreview but before you can use this you must set the Property of the Form KeyPreview = true and you mentioned the Button Click you can achieve this by using the .PerformClick Method

   private void Form1_Load(object sender, EventArgs e)
    {
        this.KeyPreview = true;
        this.KeyDown += new KeyEventHandler(Form1_KeyDown);
        button1.Click += new EventHandler(button1_Click);
    }

    private void Form1_KeyDown(object sender, KeyEventArgs e)
    {
        switch (e.KeyCode)
        {
            case Keys.Left:
                button1.PerformClick();
                break;
            case Keys.Right:
                button1.PerformClick();
                break;
            case Keys.Down:
                button1.PerformClick();
                break;
            case Keys.Up:
                button1.PerformClick();
                break;
        }
    }

    private void button1_Click(object sender, EventArgs e)
    {
        MessageBox.Show("Okay");
    }

Upvotes: 0

Bmoore
Bmoore

Reputation: 315

Take all the code from you button1.Click and put it in a separate function.

Then you can call the function from your button1.Click and your key Down event.

Inside the key down you will have to use an if statement and the e.KeyCode to make sure you have the right key before calling your subroutine.

If your code looks like this

 private void button1_Click(object sender, EventArgs e)
 {
     //do something here
 }

It will now be more like this

private void doSomething()
{
    //do something here
}

private void button1_Click(object sender, EventArgs e)
{
    doSomething();
}

private void Form1_KeyDown(object sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.Down)
    {
        doSomething();
    }
    else if(e.keyCode==Keys.Right)
    {
         doSomethingElse();
    }
     //etc.etc
}

Another more clean approach for the key down event is to use a switch statement

private void Form1_KeyDown(object sender, KeyEventArgs e)
{
    switch (e.KeyCode)
    {
        case Keys.Down:
            doSomething();
            break;
        case Keys.Right:
            //do Something Else
            break;
        case Keys.Up:
            //do Something Else
            break;
        case Keys.Left:
            //do Something Else
            break;
        default:
            //they hit a key you did not handle
            break;
    }

}

Upvotes: 1

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