Get the indexes of selected rows in GridView

Question

I want get the rows I selected from gridview use a checkbox. The checkbox is like this!

Answer 1

try this:

protected void CheckBox1_CheckedChanged(object sender, System.EventArgs e)
{
    CheckBox checkbox = (CheckBox)sender;
    GridViewRow row = (GridViewRow)checkbox.NamingContainer;
    if (checkbox.Checked == true) {
        row.BackColor = System.Drawing.Color.Red;
        mygridview.Columns(0).Visible = false;
    }
}