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.NET Framework 4.5.2+
.NET Framework 4.5.2+
.NET Standard 2.0+
.NET Core 3.0+

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.v21.1.dll

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