Insert and delete simple question

I have a simple form that has 2 columns. I have an InsertCommand and DeleteCommand. What I'm want to do is you insert/delete data and then the Update does the dirty work on one button as opposed to 2 or 3 buttons.

The Insert is fine, the delete never works. I think the problem is that the table doesn't have a primary key, but I'm not sure. The other issue on a delete statement: What works better, DeleteCommand or ExecuteNonQuery? They both do the same thing, but since that isn't working, I'm not sure.

    SqlCommand cmd = new SqlCommand("Insert into door(foo, tool) values (@dd, @tool)", conct);
            int nRo = dg.CurrentCell.RowIndex;
            cmd.Parameters.AddWithValue("@dd", dg.Rows[nRo].Cells[0].Value);            
            cmd.Parameters.AddWithValue("@tool", dg.Rows[nRo].Cells[1].Value);
            ad.InsertCommand = cmd;

            SqlCommand cmd = new SqlCommand("Delete from door where foo=@ddd", conct);            
            cmd.Parameters.AddWithValue("@ddd", dg.Rows[nRo].Cells[0].Value);  
            cmd.Parameters["@ddd"].SourceVersion=DataRowVersion.Original;
            cmd.Parameters["@ddd"].SourceColumn="foo";
            dataT.AcceptChanges();
            
            ad.DeleteCommand = cmd;             
            ad.Update(dataT);

Thanks, you've helped me so many times..