Скачать или смотреть How to Get the ngValue from Angular's select Tag?

Discover how to retrieve the value of `ngValue` from a select element in Angular forms, simplifying your data handling process.
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This video is based on the question https://stackoverflow.com/q/63769016/ asked by the user 'Ali Eshghi' ( https://stackoverflow.com/u/7999588/ ) and on the answer https://stackoverflow.com/a/63769249/ provided by the user 'Rafi Henig' ( https://stackoverflow.com/u/9369606/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Get the ngValue from Angular's <select> Tag?

When working with Angular forms, especially template-driven forms, developers often encounter challenges in retrieving the values from <select> elements. This becomes particularly tricky when using the ngValue directive to bind a value that isn’t directly the text of the option displayed to the user. If you've found yourself in a similar situation, you're not alone! Let's delve into how to correctly get the value associated with an ngValue in an Angular <select> element.

The Problem

Imagine you have an Angular template-driven form where you need to capture the ngValue of a <select> option. In your code, you applied the following:

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

Here, you're trying to pass the fiscal year ID, which is a Guid, in your logIn method but are unexpectedly receiving the fiscalYearName instead. This can be quite confusing!

The Solution

To ensure that the correct value is captured and passed to your logIn method, some adjustments are necessary. Follow these organized steps to successfully retrieve the ngValue.

1. Bind the <select> and Store the Value

You can directly bind the <select> using Angular's [(ngModel)], which allows you to store the selected value easily.

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

2. Accessing the Value

With this structure, the selected fiscal year ID will be stored in loginInfo.fiscalYearID. You can now simply reference this in your logIn method, as it will automatically update when the user selects a different option.

3. Update the Submit Method

The logIn method can remain largely the same, but now you can use the fiscalYearID directly from loginInfo:

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

Summary

By following these steps, you ensure that the correct ngValue tied to your <select> element is captured and passed seamlessly through your Angular form. This approach not only simplifies your code but also enhances the maintainability of your application. Whenever you're working with similar scenarios, remember to bind your <select> using [(ngModel)] for effective data retrieval.

If you have any further questions or run into issues, don’t hesitate to reach out to the community for support. Happy coding!