Question

Following is the code is used

Dim FilterExpression As string
Dim oDate as DateTime

oDate=System.DateTime.Now
 FilterExpression = " quot_date >= '" + oDate.ToString() + "'"

Before Assign oDate contains #2/10/2013 6:10:35 PM# this but when it assign to FilterExpression it becomes quot_date >= '10/02/2013 6:10:35 PM'
Date is changing his format

Any idea why?

Answer 1

Firstly, that’s VB rather than C#.

Secondly, the value of oDate is a value of type DateTime. Whereas #2/10/2013 6:10:35 PM is a VB literal of type DateTime, that’s not representation used by DateTime.ToString. It’s using the default format for the current culture – which is apparently one using dd/MM/yyyy hh:mm:ss tt, effectively.

If you need a specific string representation, you can use a standard or custom string format as an argument to DateTime.ToString, and you can also specify the culture to use. (For example, with a custom string format you may well want to use the invariant culture.)

However, if you’re trying to use this as a value – for example in a SQL query – it would be better not to need to convert it into a string to start with. You haven’t told us much about what you’re trying to achieve, but I would try to avoid converting it into a string unless you really have to.