Question

I have a problem with my asp.net program. I am doing a Datatable.Compute on a very large database with a like condition in it. The result takes something like 4 minutes to show or does a Request timeout. If I do the same request with a = and a fix text, it takes nearly 1 minute to show, which for my use is acceptable.

Here is the line that is so slow:

float test = (int)Datatbl.Tables["test"].Compute("COUNT(pn)", "pn like '9800%' and mois=" + i + " and annee=" + j);

I have been searching for a solution for 2 days.

Please help me.

Answer 1

I found it.

I use the Dataview and send the result to a DataTable. This sped up the process 10 times

Here is an exemple:

DataView dv = new DataView(Datatbl.Tables["test"], filter, "pn", DataViewRowState.CurrentRows);
DataTable test = dv.ToTable();

and then you can use the “test” DataTable.