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.NET 8.0+

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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.v24.2.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