.NET Framework 4.5.2+
.NET Framework 4.5.2+
.NET Standard 2.0+

XPServerCollectionSource.FixedFilterCriteria Property

Gets or sets the criteria used to filter objects on the data store side. These criteria are never affected by the data-aware control that is bound to the current XPServerCollectionSource object.

Namespace: DevExpress.Xpo

Assembly: DevExpress.Xpo.v21.1.dll


public CriteriaOperator FixedFilterCriteria { get; set; }

Property Value

Type Description

A CriteriaOperator object that specifies the criteria to filter objects on the data store side.


You can use the FixedFilterCriteria property to filter data using specific criteria. To filter data, create a CriteriaOperator object and assign it to the FixedFilterCriteria property.

For examples and additional information about filter expressions, see these help topics:

It’s also possible to specify filter criteria in a string format via the XPServerCollectionSource.FixedFilterString property. The FixedFilterCriteria and XPServerCollectionSource.FixedFilterString properties are synchronized. When a filter expression is assigned to the XPServerCollectionSource.FixedFilterString property, an equivalent CriteriaOperator object is created and assigned to the FixedFilterCriteria property. When a new CriteriaOperator object is assigned to the FixedFilterCriteria property, the XPServerCollectionSource.FixedFilterString property is also modified. It will return an equivalent string expression for the specified criteria.

A data-aware control that is bound to an XPServerCollectionSource object can provide its own filter criteria. Changing the filter via the data-aware control doesn’t modify the FixedFilterCriteria property and vice versa.


The following example creates a filter and applies it to a XPServerCollectionSource object via the XPServerCollectionSource.FixedFilterCriteria property.

The filter selects records which match the following conditions

  • contain values starting with ‘A’ in the LastName column;
  • contain dates greater than Jan 1, 2003 in the ModifiedDate column.
using DevExpress.Xpo;
using DevExpress.Data.Filtering;

XPServerCollectionSource gridDataSource;
// ...
gridDataSource.FixedFilterCriteria = CriteriaOperator.Parse(
  "([LastName] LIKE ?) AND ([ModifiedDate] > ?)", 
  "A%", DateTime.Parse("1/1/2003")); 
See Also