datagridview

Question

I am getting an error:object reference not set to an instance of an object
ma code:
for (int i = 0; i < dgPreveleges.RowCount - 1; i++)
            {
                if((string)dgPreveleges.Rows[i].Cells["dgColSelectAll"].Value.ToString () == "false")
                {
                    MessageBox.Show("hi");
                }
            }
plz help me to rectify this error

Sukesh Marla · Answer

I thing is no cell with dgColSelectAll If your problem still persisit share your code.

Vulpes · Answer

Assuming you're sure that dgColSelectAll is a valid column name then the only other thing that can be null here is the cell's Value property if the cell is empty. To adjust for that try: for (int i = 0; i { object val = dgPreveleges.Rows[i].Cells[dgColSelectAll].Value; if (val != null && val.ToString() == false) { MessageBox.Show(hi); } else { MessageBox.Show(empty cell or value not false); } }