Session.GetObjectsFromSprocAsync<T>(CancellationToken, List<XPMemberInfo>, String, OperandValue[]) Method

Asynchronously executes a stored procedure and returns its result set as a collection of non-persistent objects.

Namespace: DevExpress.Xpo

Assembly: DevExpress.Xpo.v24.1.dll

NuGet Packages: DevExpress.Win.PivotGrid, DevExpress.Win.TreeMap, DevExpress.Xpo

NuGet Package: DevExpress.Xpo

Declaration

C#

public Task<ICollection<T>> GetObjectsFromSprocAsync<T>(
    CancellationToken cancellationToken,
    List<XPMemberInfo> members,
    string sprocName,
    params OperandValue[] parameters
)

VB.NET

Public Function GetObjectsFromSprocAsync(Of T)(
    cancellationToken As CancellationToken,
    members As List(Of XPMemberInfo),
    sprocName As String,
    ParamArray parameters As OperandValue()
) As Task(Of ICollection(Of T))

Parameters

Name	Type	Description
cancellationToken	CancellationToken	A CancellationToken object that delivers a cancellation notice to the running operation.
members	List<XPMemberInfo>	Specifies object members mapped to columns in the resulting set. The order of list elements should correspond to the order of the resulting set columns.
sprocName	String	A String value that specifies the stored procedure’s name.
parameters	OperandValue[]	An array of OperandValue objects representing parameters to pass to the stored procedure.

Type Parameters

Name	Description
T	The type of objects returned by the method. A class that implements this type sould be decorated with NonPersistentAttribute.

Returns

Type	Description
Task<ICollection<T>>	A Task<TResult> that returns a collection of non-persistent objects of the specified type that are instantiated with data obtained via the specified stored procedure.

Remarks

C#

XPClassInfo classInfo = session.GetClassInfo<CustOrderHistModel>();
List<XPMemberInfo> members = new List<XPMemberInfo>() {
    classInfo.GetMember(nameof(CustOrderHistModel.ProductName)),
    classInfo.GetMember(nameof(CustOrderHistModel.Total))
};
ICollection<CustOrderHistModel> sprocResultData = await session.GetObjectsFromSprocAsync<CustOrderHistModel>(CancellationToken.None, members, "CustOrderHist", "ALFKI");

VB.NET

Dim classInfo As XPClassInfo = session.GetClassInfo(Of CustOrderHistModel)()
Dim members As New List(Of XPMemberInfo)() From { _
    classInfo.GetMember(nameof(CustOrderHistModel.ProductName)), _
    classInfo.GetMember(nameof(CustOrderHistModel.Total)) _
}
Dim sprocResultData As ICollection(Of CustOrderHistModel) = Await session.GetObjectsFromSprocAsync(Of CustOrderHistModel)(CancellationToken.None, members, "CustOrderHist", "ALFKI")

This method performs the following:

• Asynchronously executes the specified stored procedure with parameters and obtains the result as a result set.
• Populates a collection with classInfo objects that are instantiated with the result set’s data. The type and the order of classInfo members should exactly match the result set’s columns. Note that classInfo should represent a non-persistent class decorated with a NonPersistentAttribute.

Note

The GetObjectsFromSprocAsync<T> method throws an exception if the members list includes any of the following object members:

• A property that is not defined within the T type.
• A struct type member.
• A reference to a class with a struct type member.
• A collection used in object relations.

To learn more about executing stored procedures in XPO and retrieving objects from the results, refer to Stored Procedures.