eXpressApp Framework - Tips & Tricks (July 2020)

Here is this month’s edition of XAF Tips & Tricks. As always, we hope the information contained within this post is of value as you explore and leverage the capabilities of the eXpressApp Framework. 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.

Thank you for your continued commitment to XAF!

Interesting Support Tickets

• Security - Note that the static SecuritySystem.CurrentUserId property returns null instead of an empty string in XPO-based applications without the Security System since v20.1.6 (T907198)
  
• Security - Use the CurrentUserId operator in non-XAF applications (T913514)
  
• Security - Hide rows from the Navigation Items lookup in a Navigation Permission Detail View (T905783)
• Office - Choose the best way to store string properties to be shown in the RichTextPropertyEditor (T829424)
• XPO - Address an issue with the string constant in the SetPropertyValue method when renaming properties (T914393)
  
• XPO - Determine where and why the CannotLoadObjectsException is thrown (T885167)
  
• XPO - Why you may have empty records in the database when using Master-Detail mode with an XPO datasource (T905504)
  
• Web - Clone a List View row in the inline edit mode (T919722)

New and Updated KB Articles

• WinForms - How to show full member names in the Column ChooserColumn Chooser
• XPO - How to select data from multiple tables

Documentation Updates

XPO Documentation Structure Update

We updated XPO’s documentation structure to improve navigation between learning materials: eXpress Persistent Objects Documentation. Let us know if this change helps and how we can enhance our help file further. 

Non-Persistent Object Validation

We updated the following topic to explain the requirements for the non-persistent objects you can validate via our Validation Module: Declare Validation Rules.

Blazor Basic Tutorial

Create a simple Blazor application, customize its UI, and extend its functionality with our built-in Validation Module: Basic Tutorial (Blazor SimpleProjectManager Application).

If you’d like to learn more about XAF’s Blazor UI, feel free to watch the following introductory video.

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