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[DefaultClassOptions]public class Contact : Person { //... [DataSourceProperty("Department.Contacts",DataSourcePropertyIsNullMode.SelectAll)] [DataSourceCriteria("Position.Title = 'Manage

Add a new View Controller to the MySolution.Module project, as described in theAdd a Simple Action lesson. Name it PopupNotesController.Right-click the MySolution.Module | Controllers | PopupNot

Assign a Custom Image

When setting the object caption format you can explicitly specify the format string. For instance,{0:ArticleNo:0000,00#}, or {0:PeriodDateValue:MM.yyyy}.

Make a Property Calculable

Filter Lookup Editor Data SourceSet the Many-to-Many relationship between the Position and Department classes.

Add an Item to the Navigation Control

Implement Property Value Validation in the Application Model

Display a Detail View Together With a List View

Add an Item to the New Action

Add an Editor to a Detail View

Add an Action with Option Selection

Place an Action in a Different Location

public class DemoTask : Task { // ... private Priority priority; public Priority Priority { get { return priority; } set { SetPropertyValue("Priority", ref prio

C# CopyCode imageCopy Code [DefaultClassOptions]public class Contact : Person { //... private Department department; [Association("Department-Contacts", typeof(Department))] public D

Drag the ValidationModule item from this page to the Designer'sRequired Modules section.

[DefaultClassOptions][ModelDefault("Caption", "Task")]public class DemoTask : Task { //... [Action(ToolTip = "Postpone the task to the next day")] public void Postpone() { if(Due

protected override void SaveAndClose(SimpleActionExecuteEventArgs e) { View view = View; base.SaveAndClose(e); if ((view != null) && (((DetailView)view).ObjectTypeInfo.Type ==

using DevExpress.ExpressApp.Web.Editors;using DevExpress.Web.ASPxEditors;using DevExpress.ExpressApp.Utils;// ...private void WebNullTextEditorController_Activated(object sender, EventArgs e) {

Specify Action SettingsNavigate to the Misc category. By default, the Tooltip property is set to theCaption property's value. Set the "Clear the current object's fields" value instead. Set t

Add an Action that Displays a Pop-up Window using DevExpress.Persistent.BaseImpl;// ...private void ShowNotesAction_CustomizePopupWindowParams(object sender, CustomizePopupWindowParamsEventA

Deactivate an Action

Since you are going to access the settings of the List View's grid control, you need to ensure it has already been created. That's why you need to subscribe to the Controller'sViewControlsCreated ev

Activate a Filter Action