C# datagridview adding extra items not showing up

Question

I have a DataGridView and a button. On pressing this button it should add in a new row into the DataGridView. In order to do this I have the following code:

    List<NavigationInfo> navigationRules = new List<NavigationInfo>();
    private void button1_Click(object sender, EventArgs e)
    {
        navigationRules.Add(new NavigationInfo());
        setDataSource(navigationRules);
    }


    public void setDataSource(List<NavigationInfo> data)
    {
        this.dataGridView2.DataSource = data;
        this.dataGridView2.Show();
        this.dataGridView2.Invalidate();
        this.dataGridView2.Update();
    }

Now when I click on this button the first time it correctly adds in a new row. If however I click on it a second time it does not show up. Breakpointing shows me that the datasource does actually receive extra items. They just don't show up.

Anybody know how to fix this?

Answer 1

You need to call refresh() once you update, also set the DataSource to null,

this.dataGridView2.DataSource = null;
this.dataGridView2.DataSource = data;        
dataGridView2.update();
dataGridView2.refresh();