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I'm trying to format some cells in a Reporting Services report that will contain DateTime? values - or not.
If the underlying data has a NULL for that DateTime?, I'd like to show nothing (empty cell) - and if that data source contains a value, I'd like to show the date in short date format (dd.MM.yyyy in my locale).
So I tried to put this formula into the relevant SSRS cells
=FormatDateTime(Fields!DatumBSE.Value, 2)
but now I'm getting 01.01.0001 for all NULL dates....
I can't seem to wrap my head around how to do this in a SSRS (VB) formula.... I tried using IsNothing() but that doesn't seems to really help - I can detect a NULL, but how to I tell the cell to show an empty string in that case?
Solution:
I ended up using this function:
=IIF(IsNothing(Fields!DatumBSE.Value), "", FormatDateTime(Fields!DatumBSE.Value, 2))
Seems to work just fine for me now.
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If we are getting the data from a Database, we can use ISNull or COALESCE function to replace Null values with values we would like. But if we want to replace the Null/Blank values in SSRS Report, we need to use IIF and Isnothing functions in expressions.
You can use FORMAT function to format numbers, e.g. =Format(Fields! MyField. Value,"0.00").
In SSRS a multi-value parameter cannot include a NULL value, so users can't filter the data for NULL values.
How to check if a parameter is NULL in SSRS? The IsNothing() function returns True if the Paramter value is NULL , otherwise it will return FALSE.
I just tested the following expression and it replaced the null date with an empty string:
=IIF(Fields!DatumBSE.Value is nothing, nothing, FormatDateTime(Fields!DatumBSE.Value, 2))
The other suggestion that I would make is that you could format the date to the correct format in the report dataset by placing a CASE expression around the date value.
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