ObjectDataSource.BeforeFill Event

Occurs before filling an object data source, which enables you to provide custom data source validation.

Namespace: DevExpress.DataAccess.ObjectBinding

Assembly: DevExpress.DataAccess.v24.1.dll

NuGet Packages: DevExpress.DataAccess, DevExpress.Win.PivotGrid, DevExpress.Win.TreeMap

Declaration

C#

public event BeforeFillEventHandler BeforeFill

VB.NET

Public Event BeforeFill As BeforeFillEventHandler

Event Data

The BeforeFill event's data class is BeforeFillEventArgs. The following properties provide information specific to this event:

Property	Description
ConstructorInfo	Returns an object providing access to constructor parameters of an ObjectDataSource.
DataMember	Returns the data member specified for an ObjectDataSource.
DataSource	Returns the data source assigned to an ObjectDataSource.
IsValid	Specifies whether or not the object data source is valid.
Parameters	Returns a collection of method and constructor parameters of an ObjectDataSource.

Remarks

The BeforeFill event occurs before filling an object data source.

If the BeforeFillEventArgs.IsValid property returns false, a ValidationFailedException is thrown.

Important

BeforeFillEventArgs.IsValid is false if the object data source uses an untrusted data source type.

To validate all object data sources in an entire application, handle the ObjectDataSource.BeforeFillGlobal event.