EditorExtension.GetValue<T>(String, ValidationSettings, EventHandler<ValidationEventArgs>, ref Boolean) Method

Returns a specific editor’s value, which is validated based on both the passed validation settings and custom validation logic, and indicates whether the editor value is valid.

Namespace: DevExpress.Web.Mvc

Assembly: DevExpress.Web.Mvc5.v18.2.dll

Declaration

C#

public static T GetValue<T>(
    string name,
    ValidationSettings validationSettings,
    EventHandler<ValidationEventArgs> validationDelegate,
    ref bool isValid
)

VB.NET

Public Shared Function GetValue(Of T)(
    name As String,
    validationSettings As ValidationSettings,
    validationDelegate As EventHandler(Of ValidationEventArgs),
    ByRef isValid As Boolean
) As T

Parameters

Name	Type	Description
name	String	A string specifying the editor name (SettingsBase.Name).
validationSettings	ValidationSettings	A ValidationSettings object containing the settings that relate to editor validation.
validationDelegate	EventHandler<ValidationEventArgs>	A method to which custom validation processing is delegated.
isValid	Boolean	true if the editor value is valid; otherwise, false.

Type Parameters

Name
T

Returns

Type	Description
T	An object representing the editor value.

Remarks

The GetValue<T> method is in effect only for DevExpress editor extensions (i.e. EditorExtension class descendants).

Use the static GetValue<T> method to access the editor value within the controller code.

Note

In order to pass the editor value to the controller, place the editor within the <form> tag (e.g. using the Html.BeginForm Method) and then submit the form to the server.

Note that the client-side validation of user input can prevent the form from being submitted it to server unless the end-user input is valid.

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the GetValue<T>(String, ValidationSettings, EventHandler<ValidationEventArgs>, ref Boolean) method.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

MVC-Data-Editors---Built-in-Validation/CS/CS/Controllers/HomeController.cs#L15

BuiltInValidationData validationData = new BuiltInValidationData {
    Name = EditorExtension.GetValue<string>("Name", BuiltInValidationHelper.NameValidationSettings, BuiltInValidationHelper.OnNameValidation, ref isValid),
    Age = EditorExtension.GetValue<int?>("Age", BuiltInValidationHelper.AgeValidationSettings, BuiltInValidationHelper.OnAgeValidation, ref isValid),

VB.NET

MVC-Data-Editors---Built-in-Validation/VB/CS/Controllers/HomeController.vb#L17

Dim validationData As BuiltInValidationData = New BuiltInValidationData With { _
    .Name = EditorExtension.GetValue(Of String)("Name", BuiltInValidationHelper.NameValidationSettings, AddressOf BuiltInValidationHelper.OnNameValidation, isValid), _
    .Age = EditorExtension.GetValue(Of Integer?)("Age", BuiltInValidationHelper.AgeValidationSettings, AddressOf BuiltInValidationHelper.OnAgeValidation, isValid), _