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.v24.2.dll

Declaration

C#

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

VB.NET

Public Function SelectDataAsync(
    classInfo As XPClassInfo,
    properties As CriteriaOperatorCollection,
    criteria As CriteriaOperator,
    groupProperties As CriteriaOperatorCollection,
    groupCriteria As CriteriaOperator,
    selectDeleted As Boolean,
    skipSelectedRecords As Integer,
    topSelectedRecords As Integer,
    sorting As SortingCollection,
    callback As AsyncSelectDataCallback
) As Object

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>.