C#

//https://stackoverflow.com/a/1668493/133321
//https://stackoverflow.com/a/221941/133321
public static byte[] ImageToByteAry(Image image, ImageFormat format)
{
    var stream = new System.IO.MemoryStream();
    image.Save(stream, format);
    stream.Position = 0;

    return stream.ToArray();
}

private void DoWork()
{
  // your old selectionchanged code here
}

private void dataGridView1_SelectionChanged (object sender, EventArgs e)
{
  DoWork(); 
}

private void dataGridView1_RowContextMenuStripNeeded (object sender, DataGridViewRowContextMenuStripNeededEventArgs e)
{
  DoWork();
}

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
"If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.

 private void dataGridView1_RowContextMenuStripNeeded (object sender, DataGridViewRowContextMenuStripNeededEventArgs e)
        {
            e.ContextMenuStrip = contextMenuStrip1; <--- here: The object reference has not been set to the instance of the object
            selectedrowindex = e.RowIndex;

        }

 private void dataGridView1_SelectionChanged (object sender, EventArgs e, DataGridViewRowContextMenuStripNeededEventArgs ee)
            {
               dataGridView1_RowContextMenuStripNeeded (sender, ee);
            }

Member 10975497 wrote:

how to make it fit?

Member 10975497 wrote:

I also tried this:

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
"If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.

Trying the menustrip-thing as a parameter in the DoWork method Smile | :)

private ContextMenuStrip contextMenuStrip1;

public Form1()
{
    InitializeComponent();
    dataGridView1.RowContextMenuStripNeeded += dataGridView1_RowContextMenuStripNeeded;
    dataGridView1.SelectionChanged += dataGridView1_SelectionChanged;

    contextMenuStrip1 = new ContextMenuStrip();
    contextMenuStrip1.Items.Add("The turtle moves.");
}

void dataGridView1_SelectionChanged(object sender, EventArgs e)
{
    DoMyBidding(null);
}

void dataGridView1_RowContextMenuStripNeeded(object sender, DataGridViewRowContextMenuStripNeededEventArgs e)
{
    e.ContextMenuStrip = contextMenuStrip1;
    int selectedrowindex = e.RowIndex; // why not dataGridView1.SelectedRows[0].Index?

    DoMyBidding(e.ContextMenuStrip);
}

void DoMyBidding(ContextMenuStrip humbly)
{
    // do whatever you normally do?
}

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
"If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.