Nullable Element (RDL)

Indicates whether the value for the parameter can be null.

语法

<ReportParameter Name="...">
       ...
        <Nullable>...</Nullable>
       ...
</ReportParameter>

Element Characteristics

Characteristic Description

Data type and length

Boolean

Default value

False

Cardinality

0-1: Optional element that can occur once or not at all.

Element Relationships

Relationship Element

Parent element

ReportParameter

Child element

None

备注

If the value of the Nullable element is False, and the sibling Prompt element is omitted, the sibling DefaultValue element is required.

请参阅

参考

Report Definition XML Elements
DefaultValue Element (RDL)

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