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V24.2
.NET 8.0+

NonPersistentObjectSpace.FirstOrDefault<ObjectType>(Expression<Func<ObjectType, Boolean>>, Boolean) Method

Searches for the first object that matches the specified criteria.

Namespace: DevExpress.ExpressApp

Assembly: DevExpress.ExpressApp.v24.2.dll

NuGet Package: DevExpress.ExpressApp

Declaration

public override ObjectType FirstOrDefault<ObjectType>(
    Expression<Func<ObjectType, bool>> criteriaExpression,
    bool inTransaction
)
    where ObjectType : class

Parameters

Name Type Description
criteriaExpression Expression<Func<ObjectType, Boolean>>

A criteria to search for an object.

inTransaction Boolean

true if the method takes unsaved changes into account; otherwise, false.

Type Parameters

Name Description
ObjectType

A type of an object to be returned.

Returns

Type Description
ObjectType

The first object that matches the specified criteria. null (Nothing in Visual Basic) if there is no object that matches the criteria.

Remarks

To learn how to use this method, refer to the IObjectSpace.FirstOrDefault<ObjectType>(Expression<Func<ObjectType, Boolean>>, Boolean) method description.

See Also