conditional group summing problem

I am having a little difficulty with aggregate functions in a group. I have two columns, one for the current year and one for the previous year. the functions are as follows:

=Sum(iif(Fields!YEAR_DESIGNATION.Value="C",Fields!AMOUNT.Value,0)) // Current year sales

and

=Sum(iif(Fields!YEAR_DESIGNATION.Value="P",Fields!AMOUNT.Value,0)) // Previous year sales

The YEAR_DESIGNATION field is based on a sql server case statement that returns a "P" or a "C" depending on the year (invoice date). Anyway, the data looks perfectly normal, each row has a "P" or a "C" along with a value in the amount field. For some reason if the grouping contains both P" and "C" rows, I get #error where the data should be. If a row only contains all P's or all C's the totals work. I have done this before but for some reason I can't get this to work.

P.S. All fields have data (there are no nulls)

It sounds like the AMOUNT field value is not of type System.Int32, but either Int16 or Double or Decimal. Assuming you are conditionally aggregating double values, you have to ensure that the datatypes are always the same:

=Sum(iif(Fields!YEAR_DESIGNATION.Value="C", CDbl(Fields!AMOUNT.Value), 0.0))

-- Robert

|||That was it! Thanks again. Your always a very big help Robert.

conditional group summing problem

I am having a little difficulty with aggregate functions in a group. I have two columns, one for the current year and one for the previous year. the functions are as follows:

=Sum(iif(Fields!YEAR_DESIGNATION.Value="C",Fields!AMOUNT.Value,0)) // Current year sales

and

=Sum(iif(Fields!YEAR_DESIGNATION.Value="P",Fields!AMOUNT.Value,0)) // Previous year sales

The YEAR_DESIGNATION field is based on a sql server case statement that returns a "P" or a "C" depending on the year (invoice date). Anyway, the data looks perfectly normal, each row has a "P" or a "C" along with a value in the amount field. For some reason if the grouping contains both P" and "C" rows, I get #error where the data should be. If a row only contains all P's or all C's the totals work. I have done this before but for some reason I can't get this to work.

P.S. All fields have data (there are no nulls)

It sounds like the AMOUNT field value is not of type System.Int32, but either Int16 or Double or Decimal. Assuming you are conditionally aggregating double values, you have to ensure that the datatypes are always the same:

=Sum(iif(Fields!YEAR_DESIGNATION.Value="C", CDbl(Fields!AMOUNT.Value), 0.0))

-- Robert

|||That was it! Thanks again. Your always a very big help Robert.

concatenating strings like summing numbers

I'd like to join string within a group, preferable with a separator, the same
way I'd sum values.
So, I'd like to write somethign like
=Join( Fields!Email.Value, ";" )
to obtain a string of semicolon separated substrings, the same way I'd say
=Sum( Fields!Number.Value) to get the sum of numeric field.
Does anyone know a way to do this?Having exactly the same problem. Thought of writing custom code, but not sure
what arguments to pass. The code had an array of strings as an argument, but
when i called the function the same way I would call an aggregate, got an
error message saying that aggregates can take only numeric values as
arguments..
"Max" wrote:
> I'd like to join string within a group, preferable with a separator, the same
> way I'd sum values.
> So, I'd like to write somethign like
> =Join( Fields!Email.Value, ";" )
> to obtain a string of semicolon separated substrings, the same way I'd say
> =Sum( Fields!Number.Value) to get the sum of numeric field.
> Does anyone know a way to do this?
>
>