Exago .NET API Documentation
DropdownDataSourceId Property
WebReports.Api.Common Namespace > Parameter Class : DropdownDataSourceId Property
For a Parameter with a Parameter Dropdown Object, this is the Id Property of the DataSource Class object from which the Parameter retrieves its values. 
Syntax
public System.int DropdownDataSourceId {get; set;}
Remarks
Same as setting the first dropdown in  Admin Console > Data > Parameters > Parameter Dropdown Object.
See Also

Reference

Parameter Class
Parameter Members

Exago Knowledge Base

Parameters