eXpressApp Framework - Tips & Tricks (October 2019)

Here's this month's XAF-related tips & tricks. If you have a support ticket you'd like to share with the XAF developer community, feel free to post a link in the comment section below.

Interesting Support Tickets

Core/General

• Sort a List View against a calculated property in Server Mode with Entity Framework (T817248)
• Display the DashbordData object in a Detail View instead of a Dashboard View (T822738)
  
• Allow administrators to impersonate users or log in using their account without entering credentials (T819870)
  
• Use custom logon parameters and strategies for multiple authentication providers in a non-XAF application (T826060)
  
• Implement a property in a base class and calculate the property value differently in descendants (T824591)
  
• Extend a list of fields available in a Mail Merge template with fields of a reference property type (T825194)
  
• Use the results of the Session.ExecuteSproc method as XtraReport's data source (T825112)
  

WinForms

• Color DetailView editors (that require a value) based on Validation module rules (T820939)
• Expand the Lookup Property Editor when a user changes an associated object property (T817093)
• Add the Taskbar Assistant component in an XAF WinForms application (T826190)
  
• XAF WinForms .NET Core 3 applications don't support the Workflow Module (T827488)
  

Web

• Change an ASP.NET Property Editor's caption at runtime (T820822)
  
• Change navigation item caption based on the number of non-viewed objects in a List View (T822113)
  
• Update a calculated property value in a List View when inline editing is enabled in an ASP.NET application (T821910)
• Use an XAF business model with appearance and validation rules in a non-XAF ASP.NET Core 3 application (T825383)
  
• Implement OAuth authentication and display an external login page instead of the default XAF login page (T825001)
  
• Add a search panel to the navigation control (T828621).

Recently Resolved Issues

• Core - Solution Wizard creates wrong content for the Error.aspx page (T826111)
• Core - Built-in XAF context menus for the TreeList are overridden with the Expand/Collapse menu of the underlying control (T819574)
• Core - ObjectSpace may silently return no objects (even though the database contains all the data) if the corresponding object type is not registered for ObjectSpaceProvider (T828300)
  
• XPO for .NET Core 3 Desktop (from the DevExpress.WindowsDesktop.* NuGet packages) does not include Dependency Injection-related functionality (T825717)
  

Documentation Updates

Custom Aggregates in Criteria Language

See our new Custom Aggregate Functions article and the How to: Implement and Use Custom Aggregate Functions step-by-step tutorial.

Office Module Updates

We reworked and extended the structure of our Office Module documentation.

• How to: Access the Rich Text Editor Controls | How to: Customize the Rich Text Property Editor
• How to: Access the Spreadsheet Controls | How to: Customize the Spreadsheet Editor

Non-Persistent Objects

We collected and described additional ways to display non-persistent or proxy objects in a Detail View: How to: Display a Non-Persistent Object's Detail View 

Your Feedback Matters

We appreciate your feedback and, as always, look forward to your comments.