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V25.1
  • .NET 8.0+

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

    Searches for the first object that matches the specified lambda expression. The generic parameter determines the object’s type.

    Namespace: DevExpress.ExpressApp

    Assembly: DevExpress.ExpressApp.v25.1.dll

    NuGet Package: DevExpress.ExpressApp

    Declaration

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

    Parameters

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

    A lambda expression to search for an object.

    Type Parameters

    Name Description
    ObjectType

    The Type of an object to be returned.

    Returns

    Type Description
    ObjectType

    The first object that matches the specified lambda expression.

    Remarks

    This method invokes the public virtual FirstOrDefault<ObjectType>(Expression<Func<ObjectType, Boolean>>, Boolean) method that does nothing and returns null (Nothing in VB). Override this virtual method in a BaseObjectSpace descendant to implement an object search.

    See Also