Detecting which type of control is active

Question

for detect that which controls is activated in windows form

this.ActiveControl = NameOfControl;

how about detect type of control , for example active control is button or textbox ?

New Edit:

i want to do something on keypress if active control is type of textBox else do nothing

protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
        {
            if (this.ActiveControl == xxxx)
            {
                //do SomeThing
            }
              return base.ProcessCmdKey(ref msg, keyData);
        }

in xxx i should type of name of control , but how can i do for all control that is type of text box?

possible duplicate http://stackoverflow.com/questions/435433/what-is-the-preferred-way-to-find-focused-control-in-winforms-app — Max, Jul 02 '13 at 07:22
Ah I see. I think the `is` operator is what you are looking for. — User 12345678, Jul 02 '13 at 07:26

score 3 · Accepted Answer · answered Jul 02 '13 at 07:22

To determine whether an active control is a Button or TextBox you could use the is operator. The is operator checks if an object is compatible with a given type. If the Control is compatible with a Button and the expression yields true, then the Control is a Button.

if (ActiveControl is Button)
{

}
else if (ActiveControl is TextBox)
{

}

score 1 · Answer 2 · answered Jul 02 '13 at 07:23

1

Use .GetType(), for example this.ActiveControl.GetType() == typeof(Button)

answered Jul 02 '13 at 07:23

shfire

837
7
7

score 1 · Answer 3 · answered Jul 02 '13 at 07:25

You could iterate over all controls on your Form and set an event handler for the GotFocus Event. In this Event handler you would set the variable:

    Control ActiveControl = null;

    private void Form1_Load(object sender, EventArgs e)
    {
        foreach (Control c in this.Controls)
        {
           if(c is TextBox)
           {
            c.GotFocus += (s, o) =>
                {
                    this.ActiveControl = s as Control;
                };
           }
        }
    }

When you use your ActiveControl objekt test for the type with the "is" operator.

Detecting which type of control is active

3 Answers3