DocumentManagerServiceExtensions.FindDocumentByIdOrCreate(IDocumentManagerService, Object, Func<IDocumentManagerService, IDocument>) Method

Static extension method that retrieves the document by the specified identifier. If a document with such an identifier does not exist, it will be created.

Namespace: DevExpress.Mvvm

Assembly: DevExpress.Mvvm.v23.2.dll

NuGet Packages: DevExpress.Mvvm, DevExpress.Win.Navigation

Declaration

C#

public static IDocument FindDocumentByIdOrCreate(
    this IDocumentManagerService service,
    object id,
    Func<IDocumentManagerService, IDocument> createDocumentCallback
)

VB.NET

<ExtensionAttribute>
Public Shared Function FindDocumentByIdOrCreate(
    service As IDocumentManagerService,
    id As Object,
    createDocumentCallback As Func(Of IDocumentManagerService, IDocument)
) As IDocument

Parameters

Name	Type	Description
service	IDocumentManagerService	The type the static extension method operates with.
id	Object	An System.Object object that represents the document’s IDocument.Id.
createDocumentCallback	Func<IDocumentManagerService, IDocument>	A System.Func object specifying the Callback function of the document creation.

Returns

Type	Description
IDocument	An object implementing the IDocument interface.

Remarks

To learn more about Callback functions, refer to Callback Functions.