how do this dataGridView1.Rows.Clear(); with backgroundWorker

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DataGridView

C#5.0

, +

when I want to show a dataGridView with backgroundWorker I call showDGV("mydataGridViewname") in bw_dowork function .

delegate void Dstr(string s);
public void showDGV(string s)
     {
         if (Controls[s].InvokeRequired)
         {
             Dstr h = new Dstr(showDGV);
             this.Invoke(h, new object[] { s });
         }
         else
         {
             Controls[s].Show();
         }
     }

now i want to do this dataGridView1.Rows.Clear(); with backgroundWorker.
I tried this:

delegate void Dstr(string s);
public void DGVRowsClear(string s)
       {
           if (Controls[s].InvokeRequired)
           {
               Dstr h = new Dstrstr(DGVRowsClear);
               this.Invoke(h, new object[] { s });
           }
           else
           {
               Controls[s].Rows.Clear();//there is problem
           }
       }