Getting Checkbox value from DataGridView

CheckBox chk = new CheckBox();
chk  = (CheckBox)gatagrid.Rows[0].Cells[0].FindControl["chkId"];
if(chk.Checked == true){
}

for(int x=0;x<dgvView.Rows.Count;x++)
{
  if(dgvView.Rows[x].Cells["CheckBoxColumn"].Value.ToString().Equals("true"))
 {
   //Your Code
 }
             (or)
if(Convert.ToBoolean(dgvView.Rows[x].Cells["CheckBoxColumn"].Value.ToString()))
{
   // Your Code
}
}