How to create RunningValue Through Column Groups?

Question

Hi Everybody i´m trying to do this with a Matrix
I want the running value of the product quantity for each month of a year,
resetting the running value
when a new year is reached
I have 2 column groups "Year" and as it´s child group "Month".
                     2009                                  
2010
                     January Febrary March      January   February  March
Product
Toolbelt            10           15       20             
1            10            50
Well that is the idea...
In the field of the quantity i´m using an expression like this = RunningValue(Fields!Quantity.Value, Sum, Nothing) .
With this expression i get the the running value and it´s great, but
it does not reset thru the years ,
it continues aggregating the quantity value.
So i tried with this expression assuming if i set the SCOPE to the Year group i can achieve this
= RunningValue(Fields!Quantity.Value, Sum, "Year") ,
But surprise!!, this is not giving me the right aggregation , i´m still dig in it and can´t find what it actually aggregates.
Am I doing something wrong?.
All the help is welcome. Thanks.

Answer 1

Hi UzielB,
Based on your information, I get your requirement completely, here you want to accumulate the value of month from
Jan to March whin one year, then return to Jan again whin another year. If I misunderstand you please do not hesitate to let me know.
Now the issue you are encountering is that the value does not reset through the different years.
 Actually, nomatter it is 2009 or 2010, RunningValue function takes different years as the same scope, so the value does not reset
 through the different years. Just like picture3.
To workaround the issue, we might need to utilize the subreport in the main report, for detailed steps please follow
these:
1.    
Design the subreport with two column groups
Year, Month and one row group Product.
2.    
Type in the expression in the data textbox
=RunningValue(Fields!Yourdatafield.Value,sum,"Product") Here
Product is the row group name.
3.    
Add one parameter
Year to the subreport, of course you should add the parameter year behind the where clause in the T-sql. Such as
select * from yourtable where Year=@Year
4.    
Delete the
Year column and Product column, here please make sure you just delete the column only rather than deleting the relevant reportitem.
5.    
Decrease the height and width of the report to the report control size, then there is no blank space when displayed in the main report.
6.    
Drag a matrix to the main report, just add one column group
Year.
7.   
Then drag a subreport control into the data textbox, and then rigth-click the subreport control->select subreport
properties
8.   
In the Subreport Properties dialogbox, please selec the subreport name in the drop-down list of
Use this report as a subreport
9.    
Swith to
Parameter tab, click Add button to add a parameter, then select the
Year in the Name drop-down list and
Year datafield in the Value drop-down list.
10.  
Click OK.
11.  
Now add another table control into the 
main report body with one column, and drag the product datafiled into the data textbox. Then group the table by
Product.
12.  
Drag this table into the
Rows  textbox of the main report. Here make sure the height of the rows in Subreport and table creted in step11 is the same, otherwise the lines in not stay in the same level.
Preview the report, you will see the report like picture2.
If you have any question about the steps, please feel free to ask.
Have a wonderful day
J
Challen Fu