RDL/RDLC Matrix Report Column Header Formatting

I am trying to format column headers in my Matrix report on an RDLC report. I have the columns specified as DateTime in my dataset and if I leave the column alone Ex:

=Fields!FinancialsTableMonthYear.Value

It displays fine Ex: 1/1/2009 | 2/1/2009 | 3/1/2009 Etc...

But if I try and put any formatting on the column header Ex:

=MonthName(Fields!FinancialsTableMonthYear.Value, true)

It will display Ex: #Error | #Error | #Error Etc...

I have also tried Ex:

=Year(Fields!FinancialsTableMonthYear.Value)

Any id开发者_StackOverflow社区eas?

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You should use =MonthName(Month(Fields!FinancialsTableMonthYear.Value))

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If you want to show the name of the month, you can use this format:

Format(Fields!FinancialsTableMonthYear.Value, "MMM")

Change the "MMM" to any format you want.