c# bindingsource filter by datetime

Question

The problem I'm having is that the filter will not accept the time part of a datetime.

For clarity,

This works.

" AND NextWorkDate <= #" + DateTime.Now.AddDays(1).ToString("dd.M.yyyy") + "#"

This doesnt work.

" AND NextWorkDate <= #" + DateTime.Now.AddDays(1).ToString("dd.M.yyyy H:mm:ss") + "#"

Whenever I try to include the time aspect of the datetime, the filter just doesnt work, it returns no rows.

I've tried it a thousand different ways and I really cant figure out why it won't take the damn time.

The datasource column that the filter is comparing to is a datetime with the format dd.M.yyyy H:mm:ss.

The database column is formatted completely differently, as yyyy-mm-dd hh:mm:ss:fff

Could this be causing some problem along the line? I think it isn't because the filter is applied to the datasource, not the database.

Answer 1

Solved.

The problem was my own foolishness. There was another class filtering the string before it went to the bindingsource.

Answer 2

There is a lack of documentation how to filter a BindingSource (or DataTable, DataView etc) by time instead of by Date only.

But this format should work:

"AND NextWorkDate <= #yyyy-MM-dd HH:mm:ss#"  

You can get this format by DateTime.ToString("yyyy-MM-dd HH:mm:ss", CultureInfo.InvariantCulture).

string filter = string.Format("...AND NextWorkDate <= #{0}#",
    DateTime.Now.AddDays(1).ToString(
        "yyyy-MM-dd HH:mm:ss", 
        CultureInfo.InvariantCulture));

However, i would prefer Linq since it is more readable, maintainable and more powerful. So you can filter the underlying list with linq. If you use a DataTable use Linq-To-DataSet, otherwise use Linq-To-Sql or Linq-To-Entities to query the datasource or Linq-To-Objects if it's just an in-memory list. Then you just have to reassign the DataSource.