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Add an Action with Option Selection

Activate a Filter Action

Add an Editor to a Detail View

Add an Item to the New Action

Display a Detail View Together With a List View

Implement Property Value Validation in the Application Model

Add an Item to the Navigation Control

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

Make a Property Calculable

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

Assign a Custom Image

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

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

Place an Action in a Different Location

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's ViewControlsCreated ev

Deactivate an Action

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

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

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

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

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

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

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

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