Hiding a tablix column conditionnaly from page to page (group member to group member)

Question

Hi
I have the following report
              Col1   Col2    Col3
Group1 
                1          2      3
                2          4      3
               3           6      6
(page break)
            Col1   Col2    Col3
Group2 
                1          1      0
                1          0      0
               2           1      0
(page break)
            Col1   Col2    Col3
Group2 
              3        2         1 
              1        4         2
              4        6        3
In Group2 (page2) since Sum(Col3) = 0 I want to hide the column for this group (page) only
The result i need is:
              Col1   Col2    Col3
Group1 
                1          2      3
                2          4      3
               3           6      6
(page break)
            Col1   Col2    
Group2 
                1          1 
                1          0  
           -----        ---          Notice there is no Col3
               2           1     
(page break)
            Col1   Col2    Col3
Group2 
              3        2         1 
              1        4         2
              4        6        3
Is it possible ?

Answer 1

This can be done by using an expression in the Hidden property of the column.
For your expression you need to know what the textbox that contains the sum is called.  Select it and have a look at its Name property in the Properties window to find out.
With that info, right-click the grey column header of the column that you want to hide and select
Column Visibility.  In the popup select the "Show of hide based on an expression" radio button and click the fx button to enter an expression.
The expression to be entered goes like this:
=IIF(ReportItems!YourSumTextbox.Value > 0, False, True)
This will completely hide the column when the sum is not more than zero.
SQL Server MVP, MCITP/MCTS SQL Server 2008
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