Forms Data Controls :: Erase Values In All Controls In A GridViewRow?

Is there an easier way to erase the data from all controls in a gridviewrow than my current approach (code below)?

The problem: When a new type of control is added to the grid, like a radiobutton, it would not get handled here without adding to the code. The tests for type of control can get long and monotonous.

The solution I am seeking: Test the control once for "is WebControl". If it is a web control, cast it and call a single command that would erase its data. Does such a concept exist in ASP.NET 2.0/C#? I know I can do other things on the WebControl level, like set backcolor, but would like to do the same for erasing data.

foreach(Control c in row.Controls)

{
if(c is TextBox)
{
TextBox tb = (TextBox)c;
tb.Text = string.Empty;
}
elseif(c is CheckBox)
{
CheckBox cbx = (CheckBox)c;
cbx.Checked = false;
}
elseif(c is DropDownList)
{
DropDownList dd = (DropDownList)c;
dd.ClearSelection();
}
}