How to improve painting performance of DataGridView?

(sorry for bad English)

I have a big problem with performance of DataGridView when it re-paints.

I'm using a DataGridView to show logs from an external application stream. Messages from the stream come in with a high frequency (less than 1 ms). If I add new row to the DataGridView immediately when each new message comes, the DataGridView doesn't have time to re-paint itself before the next message comes.

A possible solution is to use a queue to collect messages and re-paint DataGridView every 100 ms with messages from queue. This is good but the DataGridView blinks when it auto-scrolls to the last row. (Smooth scroll is disabled)

Can you help me to improve DataGridView performance?

Solution 1:

I recently had some slowness issues with DataGridView and the solution was the following code

public static void DoubleBuffered(this DataGridView dgv, bool setting)
{
    Type dgvType = dgv.GetType();
    PropertyInfo pi = dgvType.GetProperty("DoubleBuffered",
          BindingFlags.Instance | BindingFlags.NonPublic);
    pi.SetValue(dgv, setting, null);
}

It turns double buffering on for DataGridView objects. Just call DoubleBuffered() on your DGV. Hope it helps.

Edit: I might've gotten this off SO, but I can't search for the original right now so this is just to emphasize that the code isn't mine.

Solution 2:

Have you enabled double buffering for the grid view?

have a look at Horrible redraw performance of the DataGridView on one of my two screens

if you haven't already for some ideas

Solution 3:

Clean Solution without reflection is:

public class DataGridViewDoubleBuffered : DataGridView
{
   public DataGridViewDoubleBuffered()
   {
       DoubleBuffered = true;
   }
}

Then go to myForm.designer.cs and change a type from DataGridView to DataGridViewDoubleBuffered .