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

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.v21.1.dll

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