SSRS code variable resetting on new page

Question

In SSRS 2008 I am trying to maintain a SUM of SUMs on a group using custom Code. The reason is that I have a table of data, grouped and returning SUMs of the data. I have

Answer 1

Finally found the solution myself. Here it is, add Shared to the variable declarations:

Public Shared Dim GroupMedTotal as Integer
Public Shared Dim GrandMedTotal as Integer

Answer 2

Just changing the variables to shared won't work. If you set them to shared they'll be DOUBLED when you export to PDF / XLS / etc (because it just kept adding to the existing var). You have to do something like this:

Public Shared Dim grandTotal as Decimal
Public Shared Dim costCenterTotal as Decimal
Public Shared Dim workerTotal as Decimal

Public Shared Function Initialize() 
    grandTotal = 0
    costCenterTotal = 0
    workerTotal = 0
End Function

Public Function AddTotal(ByVal b AS Decimal) AS Decimal
    grandTotal = grandTotal + b
    costCenterTotal = costCenterTotal + b
    workerTotal = workerTotal  + b
    return b
End Function

Public Function GetWorkerTotal()
    Dim ret as Decimal = workerTotal
    workerTotal = 0
    return ret
End Function 

Public Function GetCostCenterTotal()
    Dim ret as Decimal = costCenterTotal 
    costCenterTotal = 0
    return ret
End Function 

Public Function GetGrandTotal()
    Dim ret as Decimal = grandTotal
    grandTotal= 0
    return ret
End Function 

Answer 3

I don't know where do you use this. but in your case, if I were you, I just use simple expression to check visibility of SUM

for example I'd use Right Click On Sum Box \ Select Expression \ then use IIF(SUM <> 0, sum. "")

It worked on every where and wont reset, in your case you have a Region and your code will reset in every region so you willface with serios isses if you don't change your way.