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

Session.GetObjectsFromSprocAsync(CancellationToken, XPClassInfo, 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.v20.1.dll

Declaration

public Task<ICollection> GetObjectsFromSprocAsync(
    CancellationToken cancellationToken,
    XPClassInfo classInfo,
    List<XPMemberInfo> members,
    string sprocName,
    params OperandValue[] parameters
)
Public Function GetObjectsFromSprocAsync(
    cancellationToken As CancellationToken,
    classInfo As XPClassInfo,
    members As List(Of XPMemberInfo),
    sprocName As String,
    ParamArray parameters As OperandValue()
) As Task(Of ICollection)

Parameters

Name Type Description
cancellationToken CancellationToken

A CancellationToken object that delivers a cancellation notice to the running operation.

classInfo XPClassInfo

An XPClassInfo object which contains the metadata information on a non-persistent class corresponding to the stored procedure's result set. The class must be decorated with NonPersistentAttribute.

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.

Returns

Type Description
Task<ICollection>

A Task<TResult> that returns a collection of non-persistent classInfo objects instantiated with data obtained via the specified stored procedure.

Remarks

XPClassInfo classInfo = session.GetClassInfo<CustOrderHistModel>();
List<XPMemberInfo> members = new List<XPMemberInfo>() {
    classInfo.GetMember(nameof(CustOrderHistModel.ProductName)),
    classInfo.GetMember(nameof(CustOrderHistModel.Total))
};
ICollection sprocResultData = await session.GetObjectsFromSprocAsync(CancellationToken.None, classInfo, 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 method throws an exception if classInfo members include any of the following:

  • A property that is not defined within the classInfo object.
  • 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.

See Also