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 |
|
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)