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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>>, Boolean) Method

Searches for the first object that matches the specified lambda expression. The generic parameter determines the object’s type. This method takes uncommitted changes into account.

Namespace: DevExpress.ExpressApp

Assembly: DevExpress.ExpressApp.v21.1.dll

Declaration

public virtual 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

The Type of an object to be returned.

Returns

Type Description
ObjectType

The first object that matches the specified lambda expression.

Remarks

This method does nothing and returns null (Nothing in VB), override it in BaseObjectSpace descendants.

See Also