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SSRS: The report parameter "DataSet1_xxxx" is a multi value parameter and accept NULL value, This is not allowed

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Posted on by Community Member

Hi all,

While creating SSRS report, one of my parameter which is a List type , so it is multi Value, can I put this as Nullable ?

Because it is coming from my report parameter which is allowed to have multiple value, but it is not mandatory so it is possible to have NULL.

What should I do to cater this ?

Currently I put the Nullable to True, while the MultiValue also true, and give me error as in subject.

Thanks.

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Sukrut Parab 71,710 Moderator on at

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What is set in the allow blank property ?

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Mea_ 60,284 on at

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If you get that error then its not allowed. It should not be null anyway, how do you init that list parameter?

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Blue Wang on at

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Hi WWwong,

In SSRS a multi-value parameter cannot include a NULL value.

There is a method mentioned here, you can try it:

https://www.mssqltips.com/sqlservertip/3502/allow-null-value-in-multi-value-report-parameter-in-sql-server-reporting-services/

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Community Member on at

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Hi,

@Sukrut, the AllowBlank property for that particular parameter is now False, So I can use this ?

@Ievgen, the list is coming from a UIBuilder class that query CustTable which using SysLookupMultiSelectCtrl.

@Blue, the link is good, but I'm wondering if it is make sense to add NULL value in that list, which is a query from CustTable.

Thanks,

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Blue Wang on at

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Hi WWwong,

You want to pass multiple lookup, I think NULL is meaningless for your needs.

You can use ListIterator.more () to confirm whether it points to a valid element in processReport().

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