CELLS value with 2 condition C#

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I put two condition from two cells but don't wotk, please respond

First part condition work fine, when put && and other condition don't work after

C#

if (row.Cells["Status"].Value.ToString() == "Otvoren" && row.Cells["RN"].Value.ToString() == null)

What I have tried:

C#

private void OrdersDataGridView_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
        {
            foreach (DataGridViewRow row in OrdersDataGridView.Rows)
            {
                if (row.Cells["Status"].Value.ToString() == "Otvoren" && row.Cells["RN"].Value.ToString() == null)
                {
                    row.DefaultCellStyle.ForeColor = System.Drawing.ColorTranslator.FromHtml("#FF5F1F");
                }

            }
        }

Posted 6-Oct-22 22:16pm

Stylus STYLUS

Updated 7-Oct-22 10:37am

PIEBALDconsult

v2

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CHill60 · Accepted Answer · 2022-10-06T23:12:00

It's not entirely clear, but you seem to be saying that adding

C#

row.Cells["RN"].Value.ToString() == null

causes a problem. By "don't work" I am taking it to mean that you get an exception raised when you run the program and that cell is null.

I believe it is because you are trying to execute the .ToString() method on a null instance - which will cause an error.

Instead of using .ToString, test for the actual value being null i.e.

C#

row.Cells["RN"].Value == null