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

Validates multiple objects against RuleSet rules with the given validation contexts. If validation fails, the ValidationException is thrown and the method passed as the validationFailedDelegate parameter is called.

Namespace: DevExpress.Persistent.Validation

Assembly: DevExpress.Persistent.Base.v24.2.dll

NuGet Package: DevExpress.Persistent.Base

Declaration

C#

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

VB.NET

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 for which rules 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 IRuleSet.ValidationCompleted event at the end of validation.

The following code snippet 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.GetService(Application.ServiceProvider)
            .ValidateAll(ObjectSpace, ObjectSpace.GetObjectsToSave(false), DefaultContexts.Save, null, Frame);
    }
}