如何最好地将大量数据添加到DataGridView

Question

I am reading a long text file with currently round about 900.000 lines (log files). I am then filling a DataTable object with the data and until then everything is fine. But when assigning the huge DataTable object to the DataGridView.DataSource it takes ~ 10 minutes until the application is responsive again and the DataGridView shows the data. The same happens if I load the data to the DataGridView directly without a DataTable object. Is there a better way to work with this huge amount of data and a DataGridView?

Answer 1

Yes; you need to enable "virtual mode". This isn't entirely trivial, as you need to provide the code to provide cell values on-demand (rather than filling everything in advance), but it isn't horrendous either. Here's a complete walkthrough in the Microsoft docs.

However, from a UX perspective, maybe a better solution is to make it such that you don't need to display nearly a million lines in a grid . That isn't a useful user experience, in most cases.