Question

What is the best way to refresh a DataGridView when you update an underlying data source?

I’m updating the datasource frequently and wanted to display the outcome to the user as it happens.

I’ve got something like this (and it works), but setting the DataGridView.DataSource to null doesn’t seem like the right way.

List<ItemState> itemStates = new List<ItemState>(); dataGridView1.DataSource = itemStates;  for (int i = 0; i < 10; i++) {      itemStates.Add(new ItemState { Id = i.ToString() });     dataGridView1.DataSource = null;     dataGridView1.DataSource = itemStates;     System.Threading.Thread.Sleep(500); } 

Answer 1

Well, it doesn’t get much better than that. Officially, you should use

dataGridView1.DataSource = typeof(List);  dataGridView1.DataSource = itemStates; 

It’s still a ‘clear/reset source’ kind of solution, but I have yet to find anything else that would reliably refresh the DGV data source.