Getting control name for an event

问题

In my C# Windows Forms form I have some buttons which are dynamically generated. I assigned the following method on the click event. Is it possible to get the name of the button from which the event is triggered?

private void btnBrowsDoc_Click(object sender, EventArgs e)
{
    try
    {
        if (openFileDialog1.ShowDialog().Equals(DialogResult.OK))
        {
            gbxDocument.Controls["txtDocument" + count].Text =
                openFileDialog1.FileName;
        }
        else
        {
            return;
        }
    }
    catch (Exception ex)
    {
        //handle the exception
    }
}

回答1:

You can use the sender argument. That is the Control (the button in this case) that has raised the click event:

var button = (Button)sender;
button.Name ...

N.B.: In case you have subscribed other controls (e.g. panels, etc.) to the same event handler, you can check if the sender is a button using the asoperator:

var button = sender as Button;
if (button != null)
{
    button.Name ...
    ...
}

回答2:

The first argument of the event handler, "object sender", contains a reference of an object/control which raised/fired an event.

var button = sender as Button;

来源：https://stackoverflow.com/questions/7644131/getting-control-name-for-an-event