Report Builder Error: [BC30455] Argument not specified for parameter 'DateValue' of 'Public Function Day(DateValue As Date) As Integer'.

Question

Hi there!
I'm trying to calculate the difference between two days using DATEDIFF (). I use following code for this:
=DATEDIFF(DAY, CDate(Fields!Eingang_Kundenanfrage.Value),CDate(Fields!Ausgang_Angebot.Value))
Every time I try to save the report, I get this error message:
[BC30455] Argument not specified for parameter 'DateValue' of 'Public Function Day(DateValue As Date) As Integer'.
The DataSource is a SharePoint List and the Date is given in the following format: 23.05.2014 00:00:00 (DD.MM.YYYY HH:MM:SS).
I've googled for a working solution for a long time now, but I had no success.
Is there someone who can help me?

Answer 1

Hi Lucas,
According to your description, you want to return the difference between two date. It seems that you want to get the days. Right?
In Reporting Services, when we use DATEDIFF() function, we need to specify the data interval type, for days we can use "dd" or DateInterval.Day. So the expression should be like:
=DATEDIFF(DateInterval.Day, CDate(Fields!Eingang_Kundenanfrage.Value),CDate(Fields!Ausgang_Angebot.Value))
OR
=DATEDIFF("dd", CDate(Fields!Eingang_Kundenanfrage.Value),CDate(Fields!Ausgang_Angebot.Value))
Reference:
Expression Examples (Report Builder and SSRS)
If you have any question, please feel free to ask.
Best Regards,
Simon Hou