CompositeObjectSpace.IsKnownType(Type, Boolean) Method

Checks whether the Object Space (or any Object Space from its AdditionalObjectSpaces collection) can handle objects of the specified type.

Namespace: DevExpress.ExpressApp

Assembly: DevExpress.ExpressApp.v24.1.dll

NuGet Package: DevExpress.ExpressApp

Declaration

C#

public bool IsKnownType(
    Type objectType,
    bool checkAdditionalObjectSpaces
)

VB.NET

Public Function IsKnownType(
    objectType As Type,
    checkAdditionalObjectSpaces As Boolean
) As Boolean

Parameters

Name	Type	Description
objectType	Type	The type that this method checks.
checkAdditionalObjectSpaces	Boolean	Indicates if the method should also check Object Spaces from the AdditionalObjectSpaces collection.

Returns

Type	Description
Boolean	true if the Object Space (or any Object Space from its AdditionalObjectSpaces collection) can handle objects of the specified type.

Remarks

The following example demonstrates how to use this property in Application Builder code:

File: MySolution.Blazor.Server/Startup.cs, MySolution.Win/Startup.cs, MySolution.WebApi/Startup.cs

C#

using DevExpress.ExpressApp;
// ...
builder.ObjectSpaceProviders.Events.OnObjectSpaceCreated = context => {
    var nonPersistentObjectSpace = context.ObjectSpace as NonPersistentObjectSpace;
    if (nonPersistentObjectSpace != null) {
        if (!nonPersistentObjectSpace.IsKnownType(typeof(Person), true)) {
            // ...
        }
    }
};
// ...

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the IsKnownType(Type, Boolean) method.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

xaf-custom-logon-parameters/CS/XPO/WebForms/CustomLogonXPOWeb/CustomLogonXPOWeb.Web/Global.asax.cs#L58

if (nonPersistentObjectSpace != null) {
    if (!nonPersistentObjectSpace.IsKnownType(typeof(Company), true)) {
        IObjectSpace additionalObjectSpace = ((XafApplication)sender).CreateObjectSpace(typeof(Company));