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Multiple Parameters in Crystal

Posted on 2016-09-20
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Last Modified: 2016-09-20
Hello,

 I have a field in which my boss wants two separate parameter prompts on the same field (I have always used a range parameter).

 The two prompts would be 1.) |enter first number| and 2.) |enter last number|

 The field is just a number (it can only be 2 through 5).  

 If |enter first number| = 2 then |enter last number| would give a choice of 2, 3, 4, or 5.  If they enter 5  for|enter last number|then you would get values 2, 3, 4, and 5 in the report.  If they enter 3 for |enter last number| then they would get values 2 and 3 in the report.

 However, if |enter first number| = 3 then |enter last number| could be 3-5

 If |enter first number| = 4 then |enter last number| could be 4-5

 If |enter first number| = 5 then |enter last number| could only be 5

 I'd also like a dropdown option and an ALL in the dropdown for both parameters which would just return all results.
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Question by:Michael Graham
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Expert Comment

by:Ido Millet
ID: 41807777
For the 2nd parameter adjusting itself, afaik, this can't be done with Crystal alone.
But you can add logic to the report so that if the user selects 2nd value that is less than the first one, the report would display no records and a text box would be unsuppressed to show a message telling the user that the 2nd parameter cannot be a value lower than the first.

For the 'ALL' option, you can set the parameter data type to String and use logic such as:
...
AND (
{?2nd_Parameter} = "ALL" or {Some_column} <= cDbl({?2nd_Parameter})
)
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Author Comment

by:Michael Graham
ID: 41807787
Okay thank you very much.  

So if they entered "2" on the first parameter and entered "4" on the second parameter there would be no way of display 2-4?

I understand the problem of using a lower digit (and they should understand that).  I.E. 3 for the first and 2 for the second.
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Author Comment

by:Michael Graham
ID: 41807788
I guess whenever I enter 2 for the first parameter no matter what I put in the second parameter it will only give me 2
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LVL 22

Expert Comment

by:Ido Millet
ID: 41807789
> So if they entered "2" on the first parameter and entered "4" on the second parameter there would be no way of display 2-4?

Simply use a record selection condition of col >= 1st parameter and col <= 2nd parameter.
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Author Comment

by:Michael Graham
ID: 41807795
okay I tried this and it didn't work:

col >= {?@drugschedulestart} and col <= {?@drugscheduleend}
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Author Comment

by:Michael Graham
ID: 41807802
I am doing this record selection formula editor
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Expert Comment

by:Ido Millet
ID: 41807803
Use your column not my "col" example.
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Author Comment

by:Michael Graham
ID: 41807809
okay sorry about that now I am getting this error: this array (the parameter in my report) needs to be subscripted (for example array)
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Accepted Solution

by:
Ido Millet earned 500 total points
ID: 41807812
Don't set the parameter to allow multiple values.
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Author Comment

by:Michael Graham
ID: 41807820
Awesome! That worked.  Thank you so much.

Mike
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Author Closing Comment

by:Michael Graham
ID: 41807821
I am new to Crystal Reports so I had to be walked through it a bit but Ido helped me despite myself
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