Expands the column/row that contains the specified value.
An object which specifies the value in the grouping column/row that should be expanded.
When the current field is placed within the Column Header Area the ExpandValue method expands the grouping column which corresponds to the current field that contains the specified value.
When the field is placed within the Row Header Area the ExpandValue method expands the grouping row that contains the specified value.
To expand all grouping rows/columns which correspond to the current field use the PivotGridFieldBase.ExpandAll method.
Grouping rows/columns which correspond to a field can be collapsed and expanded by end-users if the field's PivotGridFieldOptions.AllowExpand and control's PivotGridFieldOptions.AllowExpand properties are set to True.