SSRS - Group set of rows based on calculated value from the row's data

Question

I want to group ( display ) a set of row(s) based on a calculation on one of row's column data.

Lets say I have 3 columns in my tablix. 1. Description 2. Amount 3. Debit/Credit

based on the D/C value I would like to sum up the amount ( for debit its -ve and credit is +ve) until the total gets to zero and then group those rows into a different color or a line space between other set of rows.

Example output:

---

Description         Amount              D/C
xyz                      10                      D
sss                      10                      C

abc                      15                      D
vvv                       5                       C
ccc                       5                       C
abc                       5                       C

Thanks
Karthik

Answer 1

I've recreated your scenario using the dataset you have provided in the question. I am using the Amount cell background-color property to group the sums.

This is the tablix I've created. The selected Cell background-property is set to a expression (see below):

In Report menu, Report Properties... / Code tab put this function in the text area.

Dim prevColor As String = "Red"
Dim accumulator As Double = 0
Public Function GetSumColor(ByVal value as Double) as String
    Dim color As String             
    accumulator = accumulator + value
    color = prevColor
    If accumulator = 0 Then
        If prevColor = "Red" Then
            prevColor = "Yellow"
        Else
            prevColor = "Red"
        End If
    End If
    Return color
End Function

This function will change the cell background color between Red or Yellow based on sums equals to zero (you can use the whatever color you want).

In the Amount cell background-color property use this expression:

=Code.GetSumColor(
IIF(Fields!D_C.Value="C",-Fields!Amount.Value,Fields!Amount.Value)
)

It will produce the following result:

Let me know if this helps you.