Скачать или смотреть How to Request Parameters in C# Controller from Angular Without URL Concatenation

Learn how to pass data seamlessly from Angular to your C# controller without using URL concatenation. A step-by-step guide.
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Passing Parameters from Angular to C# Controller Without URL Concatenation

In web development, one common challenge developers face is how to effectively pass parameters from the frontend to the backend. If you're working with Angular and a C# controller, you might be wondering how to send data, such as user credentials, without resorting to URL concatenation. This guide will guide you through a clean and effective solution for this problem.

Understanding the Issue

The problem arises when you try to send data from your Angular application to a C# controller for processing. In your case, Angular's HTTP POST request isn't successfully conveying the email and password details to the backend, resulting in empty strings when attempting to retrieve them in the controller. It's important to understand that while URL parameters can be one way to send data, they aren't the only option available.

Example Code: Current Setup

In your Angular component, you are trying to gather the user's email and password using reactive forms:

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

On the server side, your C# controller is set up as follows:

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

The issue here is that your C# controller expects parameters from the query string, but you're sending the data with a POST request body.

The Solution

Step 1: Create a Model for Your Data

To facilitate the proper transfer of data, create a model class in your backend that represents the structure of the data you wish to send. For registration, a simple model might look like this:

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

Step 2: Update Your Controller Method

With the model created, update your controller method to accept a RegisterModel object instead of individual parameters. Importantly, you'll also use the [FromBody] attribute to specify that the data will be provided in the body of the request:

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

Key Takeaways

Model Creation: By creating a model, you encapsulate the data structure, making it easier to maintain and understand.

Use of [FromBody] Attribute: This tells ASP.NET Core to look for the incoming data in the body of the request rather than query parameters. This approach is more secure and adheres to RESTful standards.

Conclusion

Passing parameters from Angular to a C# controller doesn't have to be a headache. By using a model class and the [FromBody] attribute, you can send data cleanly and without cluttering your URL. This not only enhances the readability of your code but also improves maintainability and security.

Now you're equipped to share user information securely between your Angular app and C# backend—no URL concatenation necessary!

If you have any questions or additional insights, feel free to share in the comments below!