how to clear gridview

Question

I want to clear my gridview. I have 2 GridViews and Has Select Button On It. on Selecting this button that item goes into the second gridview. now the question is how should i clear the second grid view. I am trying the clear method but clear method is not found in my visual studio..

Answer 1

dataGridView1.DataSource = null;

or

dataGridView1.Rows.Clear();

Answer 2

gridview.DataSource = null;
//rebind to gridview
gridview.DataBind();