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

Session.SelectDataAsync(XPClassInfo, CriteriaOperatorCollection, CriteriaOperator, CriteriaOperatorCollection, CriteriaOperator, Boolean, Int32, Int32, SortingCollection, AsyncSelectDataCallback) Method

Asynchronously retrieves objects from a session, using the specified query parameters.

Namespace: DevExpress.Xpo

Assembly: DevExpress.Xpo.v20.2.dll

Declaration

public object SelectDataAsync(
    XPClassInfo classInfo,
    CriteriaOperatorCollection properties,
    CriteriaOperator criteria,
    CriteriaOperatorCollection groupProperties,
    CriteriaOperator groupCriteria,
    bool selectDeleted,
    int skipSelectedRecords,
    int topSelectedRecords,
    SortingCollection sorting,
    AsyncSelectDataCallback callback
)

Parameters

Name Type Description
classInfo XPClassInfo

An XPClassInfo object which provides the metadata information for the objects to be retrieved.

properties CriteriaOperatorCollection

A CriteriaOperatorCollection object which specifies object properties to be retrieved.

criteria CriteriaOperator

A CriteriaOperator descendant which specifies the objects to be retrieved.

groupProperties CriteriaOperatorCollection

A CriteriaOperatorCollection object which specifies the grouping properties.

groupCriteria CriteriaOperator

A CriteriaOperator descendant which specifies the grouping criteria for the retrieved objects.

selectDeleted Boolean

true to include the persistent objects marked as deleted into the list; otherwise, false.

skipSelectedRecords Int32

An integer value which specifies the number of objects to exclude when populating the list.

topSelectedRecords Int32

An integer value which specifies the maximum number of objects to be retrieved.

sorting SortingCollection

A SortingCollection object that specifies the sort order for the list of retrieved objects.

callback AsyncSelectDataCallback

A AsyncSelectDataCallback delegate to be called after the list has been retrieved. This list is passed as a parameter to callback.

Returns

Type Description
Object

An object identifying the current asynchronous operation, intended for internal use.

Remarks

This method is intended for internal use. To get objects from a session, use the XPCollection and XPView components or the XPQuery<T>.

See Also