Скачать или смотреть Converting WPF DatePicker Selected Date to yyyy-MM-dd Format for Database Storage

Learn how to format the output of a WPF DatePicker to `yyyy-MM-dd` for SQLite database storage while displaying it in `dd-MM-yyyy` format in your CRUD application.
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This video is based on the question https://stackoverflow.com/q/73740219/ asked by the user 'Tamal Banerjee' ( https://stackoverflow.com/u/6119995/ ) and on the answer https://stackoverflow.com/a/73740839/ provided by the user 'Muhammad Sulaiman' ( https://stackoverflow.com/u/4108016/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Mastering WPF DatePicker Date Formatting in C#

When developing applications using WPF (Windows Presentation Foundation), you may encounter the challenge of formatting dates correctly. This post addresses a common issue faced by developers working with DatePickers in WPF, particularly when storing date data in an SQLite database and displaying it in a user-friendly format in the UI.

The Problem Overview

Imagine you have a SQLite database table storing bills with various details, including dates like BillDt and DueDt. Your application includes a CRUD (Create, Read, Update, Delete) form that allows users to view and modify these dates using WPF DatePickers. However, you notice two significant problems:

You want the dates stored in your database in the format yyyy-MM-dd to maintain consistency with SQLite's date storage preferences.

You want users to see and interact with these dates in a more readable format, such as dd-MM-yyyy, when they are displayed in the DatePicker.

Currently, when you modify dates through the DatePicker and save them, they are incorrectly stored in the dd-MM-yyyy 00:00:00 format instead of your desired yyyy-MM-dd. This can cause confusion and incorrect data handling.

Understanding the Solution

The key to resolving this issue lies in implementing a custom getter for your date properties, specifically transforming the string representation of the date to the required format when the property is accessed.

Step-by-Step Guide to Implementing the Solution

Here’s how you can implement this solution in your Bills class:

1. Modify the DueDt Property Getter

You will need to change the getter of your DueDt property to ensure it formats correctly before it is saved to the database. Here’s how you can do it:

[[See Video to Reveal this Text or Code Snippet]]

2. How it Works:

TryParse Method: The DateTime.TryParse method attempts to convert the string representation of the date in _dueDt to a DateTime object.

Formatting: If the parsing is successful, dt.ToString("yyyy-MM-dd") returns the date in the desired format for database storage.

Setting Value: The setter remains unchanged, allowing you to continue capturing user input.

3. Ensure Your XAML Is Correctly Hooked Up

In your XAML, ensure that the DatePicker is bound to the BillDt property correctly:

[[See Video to Reveal this Text or Code Snippet]]

4. Displaying in a Friendlier Format

When you retrieve dates from the database to present in the DatePicker, they will be parsed correctly, and users will interact with them in dd-MM-yyyy format. Utilize the ControlTemplate in XAML to format the display accordingly if necessary.

Conclusion

By implementing these changes, you can seamlessly handle date formatting issues when working with WPF DatePicker. The solution ensures that your dates are stored in the correct format for SQLite while also providing an understandable representation for your users. This approach not only simplifies data handling but also improves the overall user experience in your application.

Implement these changes, and you will see a significant improvement in your date handling capabilities within your WPF application. Happy coding!