```
        if(e.Button == MouseButtons.Right)
        {
            string signatureDate = dataGridView3.CurrentRow.Cells[8].Value.ToString();
            // MessageBox.Show(signatureDate);
            if(signatureDate.Length > 5)
            {
                contextMenuStrip1.Items[0].Visible = false;
                contextMenuStrip1.Items[1].Visible = true;
            }else
            {
                contextMenuStrip1.Items[0].Visible = true;
                contextMenuStrip1.Items[1].Visible = false;
            }
        }

```

I have a context strip menu that is working in my datagridview. And I selected it as Row Context Strip Menu.

What I am trying to do is to get if selected row of datagridview and control signature column is null or not. If it has signature date I want to hide or unhide "Sign" and if it doesn't have signature date hide "Unsign" item on context menu strip.

You can see in picture I enclosed.[Context menu Strip](https://i.stack.imgur.com/3KabS.png)

EDIT: Name of the event is MouseDown.
EDIT 2: With editing this code I can get columns data and show them on messageBox. But I can not use those data as a condition. Therefore it is not working. For example, when I select a row that is without "Signature Date" and show it on messageBox, it is working. But when I use Signature Date data as a condition It is not working. I know it is so strange and too easy to overcome but I coundn't because of that I didn't catch anything. 

EDIT 3: [Event](https://i.stack.imgur.com/PQaKI.png)

**EDIT 4 (SOLVED) :** I created to Context Strip Menu and specify no one of them
as Context strip Menu of Datagridview.

With Datagridview\_MouseDown event, I am getting Signature Date column data and check if it is null/empty or not. If it is null/empty I specify first Context Menu strip as Context Strip Menu of Datagridview or not I do revise. I figured out the solution in this way :)