https://github.com/karenpayneoregon/filter-combobox-comparision-cs

Master details for dual ComboBox controls
https://github.com/karenpayneoregon/filter-combobox-comparision-cs

csharp efcore sql-server sqlclient

Last synced: 22 days ago
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Master details for dual ComboBox controls

• Host: GitHub
• URL: https://github.com/karenpayneoregon/filter-combobox-comparision-cs
• Owner: karenpayneoregon
• Created: 2020-03-23T00:23:48.000Z (almost 5 years ago)
• Default Branch: master
• Last Pushed: 2022-08-09T10:52:24.000Z (over 2 years ago)
• Last Synced: 2023-03-05T07:10:35.283Z (almost 2 years ago)
• Topics: csharp, efcore, sql-server, sqlclient
• Language: C#
• Homepage:
• Size: 252 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: readme.md

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README

        
# WinForms Filter ComboBox

This article filtering a ComboBox from a parent ComboBox selection done in Entity Framework Core 3.1 or higher with a comparision to performing the same operation with DataTable containers.

![1](assets/EF1.png)

Using SQL-Server database

**Microsoft TechNet article** 

[C# ComboBox to ComboBox cascade filtering DataTable verses Entity Framework Core](https://social.technet.microsoft.com/wiki/contents/articles/53760.c-combobox-to-combobox-cascade-filtering-datatable-verses-entity-framework-core.aspx)

## Notes

- 08/2022 changed framework from 4.7.2 to 4.8

- 08/2022 code changes, if a category has no products  

  - Data provider does not present the category

  - EF Core shows `None` for a category without products