Removing one particular date from a list box using expression

[AH]

Hi

Could anyone help me with this?

I have a list box with dates and i want to make a particular date null. In list box i want to make 1/1/11980 null but all other values stays as is.

Thanks,

Shan

[datanibbler]

Hi Shan,

I think listbox_elements are not particularly flexible in that respect. The best solution would probably be to just use a copy of that field that just has some text when there is this date in the original column.

Is that actually a date that is in your data? What is the reason you want to make that non_selectable (if there is a security issue, it might be a better alternative to use SECTION_ACCESS with a OMIT field?)

HTH

Best regards,

DataNibbler

[AH]

DataNibbler,

Thanks for your response. Yes its a date in my data. I dont want to omit field,  i just want to omit a field value or just want to make it null.

Thanks,

Shan

[rubenmarin · Accepted solution]

Hi, you can use expression in listbox:

=Aggr(Only({1<[Install Date]={'>01/01/1990'}>} [Install Date]), [Install Date])

[morgankejerhag]

Just to clarify Rubens answer - when you create a list box you can scroll all the way to the bottom in the drop down where you select the field. There it says "expression"

[AH]

Thanks Ruben!

That is doing the trick.

Shan

[AH]

Is it possible to apply that in the text box?

Shan

[AH]

I have one text box which is showing the Minimum install date and the expression for that is :

=Date(Min([Install Date]))

I was trying to apply your expression in this textbox expression. But its showing wrong expression.

Any help on that please!

Thanks,

Shan

[rubenmarin]

That expression returns all dates >01/01/1990. What exactly you want to put in text box?

If it's an expression filtering dates >01/01/1990 you can use something like:

Sum({<[Install Date]={'>01/01/1990'}>} Sales)

or

Sum({<[Install Date]*={'>01/01/1990'}>} Sales)

If you want to show all the dates in textbox you need to use a concatenate funcion:

Concatenate(Aggr(Only({1<[Install Date]={'>01/01/1990'}>} [Install Date]), [Install Date]))

[rubenmarin]

Ok, that should be:

=Date(Min({<[Install Date]={'>01/01/1990'}>} [Install Date])) --> Ignores selections in [Install Date]

or

=Date(Min({<[Install Date]*={'>01/01/1990'}>} [Install Date])) --> Selections in [Install Date] will count