问题
How do I add a running total or summary field on a formula field in crystal reports?
// Sample Report
Serial No. Premium Commission Net (Premium-Commission)
-----------------------------------------------------------------------------
1. 10 4 6
2. 40 30 10
---------------------------------------------------------------------------
Grand Total 50 34 16
In sample report, Net (Premium-Commission) is a formula field which gets evaluated for each row? How do I add a grand total/summary field for my formula? It seems we can add a summary field to only Command fields.
回答1:
Suppose Net (Premium-Commission) formula field name is {@Net}. Now you have to create another three formula fields.
- Initializer: this formula filed will be placed in header section to reset all variables.
- Increment: this formula field will be placed in detail section to summarize the value.
- Total: this formula field will be placed in footer section to show total of
{@Net}.
Code will be writen in formula fields as below.
{@Initializer}
WhilePrintingRecords;
Numbervar dSum :=0;
{@Increment}
WhilePrintingRecords;
Numbervar dSum; //Don't initialize zero
dSum:=dSum+{@Net}; //{@Net} formula field must be return numeric value
{@Total}
WhilePrintingRecords;
Numbervar dSum; //Don't initialize zero
dSum;
Place all formula fields in their appropriate section and suppress {@Initializer} and {@Increment} formula field.
回答2:
If you are using any calculation then that is not possible but one workaround would be to sum the each row and reset it in header.
- Create a formula
@Intializein that write below code:
Shared NumberVar count;
count:=0
- In detail write below formula and place it after
Net (Premium-Commission).
Shared NumberVar count;
Count:=count+<>
\ 3. Now create one more formula @Display and place it in footer.
Shared NumberVar count;
count;
来源：https://stackoverflow.com/questions/22779273/how-to-summarize-a-formula-field-in-crystal-reports