ASP.NET WebForms, MVC and Core - Tips & Tricks (February - March 2020)

In this post, we’ll summarize a few interesting ASP.NET examples, articles and support tickets we’ve compiled over the last two months. We hope this information is of value as you explore the capabilities of our ASP.NET product line.

Knowledge Base Articles

We published an article on our ASP.NET Scheduler’s XML helpers and a troubleshooting guide for ASP.NET controls that include file upload functionality:

• Scheduler - How to save and restore information about reminders, resources, and recurring patterns in XML format (T866681)
• Troubleshooting - How to resolve "The controller for path 'ASPxUploadProgressHandlerPage.ashx' was not found or does not implement IController" error on file uploading (T859077)

New Examples

We recently published examples for our ASP.NET MVC Diagram control on GitHub.

• Diagram - Tree from Linear Data Structure - How to bind the extension to an in-memory data source (T862025) (View on GitHub)
• Diagram - Node and Edge data sources - How to bind the extension to in-memory data sources (T861989) (View on GitHub)
• Diagram - How to bind containers to an in-memory data source (T862049) (View on GitHub)

Interesting Technical Support Tickets

Common

• Rich Edit Control - How to implement checkboxes in a document (T873026)

ASP.NET Web Forms

• GridView - How to save and restore client layout settings, including column visibility and order, in Data Base (T870715)
• GridView - How to filter data using the filter row editors and the OR operator (T868517)
• GridView - How to display custom information as header/footer for specific rows only (T870030)
• GridView - How to enable/disable editing in the grid dynamically (at runtime) (T867932)
• GridView - How to expand the top row's detail row just after a new row inserted in Master-Detail grid. (T865404)
• GridView - Is it possible to share the same calendar across all the date editors within the grid (T861819)
• GridView - How to filter data using the filter row editors and the OR operator (T868517)
• GridView - How to assign a color for a clicked custom button (T866810) 

• Scheduler - How to display all resources in Appointment Dialog after hiding specific items in the FilterResource event handler (T834629)
• Scheduler - How to display a prompt text for CheckedListBox used within DropDownEditor using View Model API (T862071) 
  

• List Box - How to implement dropdown list with grouped items (T867614)
• Splitter - How to display content from panes only when all content from all panes is loaded (T863101)

ASP.NET WebForms for Bootstrap

• Pager for Bootstrap - How to handle the client-side click event (T866873)

ASP.NET MVC

• GridView - How to display and edit column values using a predefined collection with the capability to filter the column's values (T867269)
• GridView - How to perform custom validation when master and detail records are saved simultaneously (T866294)
• GridView - How to add HTML5 video to a column (T869616)
• GridView - How to provide custom text for CheckBox (bool) column (T867648)
• GridView - How to hide and show the CommandColumn check box when hovering over a record (T862333)
• GridView - How to set the edit mode conditionally - Batch Edit for existing rows - PopupEditForm for new rows (T871854)
• GridView - Batch Edit - How to use TreeList inside DropDownEdit to edit a column value (T869837)
  

• Scheduler - How to display information about empty and non-empty resources scale headers (T856812)
• RichEdit - Mail Merge - How to patch the result value if the MAILMERGE field value is empty (T869403)

Documentation Updates

We published multiple help topics for those using our Rich Text Edit Control for ASP.NET Core:

Client-side API contains all Rich Text Edit members available on the client.

Document Management describes available API to create, open, save, download, and print (it also includes other document management operations available to you when using our Rich Text Edit control). 

Feedback

As always, we welcome your comments and feedback. If you’ve come across a useful Support Center ticket, feel free to share it with the DevExpress developer community here.

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