PBI filter: Include Null/Blank with Date From

Hi jilanis 

Are you going to add filters in a calculation or filter data displayed in a visual? If you want to add filters in a DAX expression, you can try below mode

Measure =
CALCULATE (
    [Expression],
    FILTER (
        'Table',
        'Table'[Starting_Date] <= SELECTEDVALUE ( 'Field1'[Date-From] )
            && (
                'Table'[Closure_Date] >= SELECTEDVALUE ( 'Field2'[Date-To] )
                    || ISBLANK ( 'Table'[Closure_Date] )
            )
    )
)

If you want to filter data in a visual, you can create the following measure as a flag. Use this measure as a visual-level filter on the visual and set it to show items when value is 1. 

flag =
IF (
    SELECTEDVALUE ( 'Table'[Starting_Date] )
        <= SELECTEDVALUE ( 'Field1'[Date-From] )
        && (
            SELECTEDVALUE ( 'Table'[Closure_Date] ) >= SELECTEDVALUE ( 'Field2'[Date-To] )
                || ISBLANK ( SELECTEDVALUE ( 'Table'[Closure_Date] ) )
        ),
    1,
    0
)

For above methods, your "Date-From" and "Date-To" should come from two independent date tables which don't have relationships with other tables. 

Best Regards,
Community Support Team _ Jing
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