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.

Need Faster Support Replies?

Once you create a new XAF ticket in the DevExpress Support Center and select XAF under the Platform/Product field, please review the following help links displayed above the Submit button. These links describe how you can collect callstacks, logs and other important diagnostic information for any .NET error. Once you collect/compile this information, forward it to us along with your support ticket. This information will ensure faster and more accurate replies from support.