RuleSet.ValidateAll(IObjectSpace, IEnumerable, ContextIdentifiers, ValidationFailedDelegate, Frame) Method

Validates multiple objects against RuleSet‘s rules with the given validation contexts, returns a result and throws a ValidationException if the validation fails.

Namespace: DevExpress.Persistent.Validation

Assembly: DevExpress.Persistent.Base.v20.2.dll

NuGet Package: DevExpress.Persistent.Base

Declaration

C#

public bool ValidateAll(
    IObjectSpace targetObjectSpace,
    IEnumerable targets,
    ContextIdentifiers contextIDs,
    ValidationFailedDelegate validationFailedDelegate,
    Frame sourceFrame = null
)

VB.NET

Public Function ValidateAll(
    targetObjectSpace As IObjectSpace,
    targets As IEnumerable,
    contextIDs As ContextIdentifiers,
    validationFailedDelegate As ValidationFailedDelegate,
    sourceFrame As Frame = Nothing
) As Boolean

Parameters

Name	Type	Description
targetObjectSpace	IObjectSpace	An IObjectSpace used by a validation target.
targets	IEnumerable	The list of objects to check.
contextIDs	ContextIdentifiers	The ContextIdentifiers object which is a set of validation contexts, rules for which will be collected. Default contexts are stored in the DefaultContexts enumeration.
validationFailedDelegate	DevExpress.Persistent.Validation.ValidationFailedDelegate	A method to call if the validation fails.

Optional Parameters

Name	Type	Default	Description
sourceFrame	Frame	*null*	The Frame of the Controller that validates objects. This parameter is optional and used in WinForms applications only.

Returns

Type	Description
Boolean	true, if validation passes; otherwise, false.

Remarks

This method raises the RuleSet.RuleValidated event for each target and the RuleSet.ValidationCompleted event at the end of validation.

The following example demonstrates how to use this method to validate objects when an Action is executed:

C#

using DevExpress.ExpressApp;
using DevExpress.ExpressApp.Actions;
using DevExpress.Persistent.Base;
using DevExpress.Persistent.Validation;
// ...
public partial class CustomValidationController : ViewController {
    public CustomValidationController() {
        SimpleAction validationAction = new SimpleAction(this, "ValidateBeforeSave", PredefinedCategory.Edit);
        validationAction.Execute += ValidationAction_Execute;
    }
    private void ValidationAction_Execute(object sender, SimpleActionExecuteEventArgs e) {
        Validator.RuleSet.ValidateAll(ObjectSpace, ObjectSpace.GetObjectsToSave(false), DefaultContexts.Save, null, Frame);
    }
}

VB.NET

Imports DevExpress.ExpressApp
Imports DevExpress.ExpressApp.Actions
Imports DevExpress.Persistent.Base
Imports DevExpress.Persistent.Validation
' ...
Partial Public Class CustomValidationController
    Inherits ViewController
    Public Sub New()
        Dim validationAction As New SimpleAction(Me, "ValidateBeforeSave", PredefinedCategory.Edit)
        AddHandler validationAction.Execute, AddressOf ValidationAction_Execute
    End Sub
    Private Sub ValidationAction_Execute(ByVal sender As Object, ByVal e As SimpleActionExecuteEventArgs)
        Validator.RuleSet.ValidateAll(ObjectSpace, ObjectSpace.GetObjectsToSave(False), DefaultContexts.Save, Nothing, Frame)
    End Sub
End Class