Expression: IExpression;
The Expression property returns expression of calculated field. If the field is not calculated, the empty value is returned.
Sub Main;
Var
MB: IMetabase;
DSInst: IDatasetInstance;
DSModel: IDatasetModel;
Fields: IDatasetModelFields;
Field: IDatasetModelField;
s: String;
Begin
MB:=MetabaseClass.Active;
DSInst:=MB.ItemById("Table_1").Open(Null) As IDatasetInstance;
DSModel:=DSInst.Dataset;
Fields:=DSModel.Fields;
Field:=Fields.Item(0);
s:=Field.Expression.AsString;
End Sub Main;
After executing the example, the "s" variable contains an expression of the first field of data source, transformed to string type. The identifier of data source is Table_1.
See also: