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V24.2
.NET 8.0+

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

Searches for the first object that matches the specified expression.

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 lambda expression 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 expression.

#Remarks

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

See Also