ASP.NET Core is a powerful and versatile programming language that allows developers to build robust web applications. One common task in web development is posting a filled-in model back to the server. In this article, we will explore how to accomplish this using ASP.NET Core, and provide examples along the way.
To begin, let's assume we have a simple form with several input fields, such as name, email, and message. When the user fills in these fields and submits the form, we want to capture the data on the server side.
First, we need to define a model that represents the data we want to capture. In this case, let's create a class called “ContactForm” with properties for name, email, and message. Here's an example of how the model class might look:
public class ContactForm
{
public string Name { get; set; }
public string Email { get; set; }
public string Message { get; set; }
}
Now that we have our model defined, we can create a form in our ASP.NET Core view to capture the user's input. Here's an example of how the form might look:
In the form above, we set the method attribute to “post” and the action attribute to “/Contact/Submit”. This tells the browser to send the form data to the specified URL when the user clicks the submit button.
Now, let's move on to the server-side code. In our ASP.NET Core controller, we need to define an action method that will handle the form submission. Here's an example of how the action method might look:
[HttpPost]
public IActionResult Submit(ContactForm model)
{
// Do something with the submitted data
// For example, save it to a database or send an email
return RedirectToAction("ThankYou");
}
In the code above, we use the [HttpPost] attribute to specify that this action method should only be invoked for HTTP POST requests. The action method takes a parameter of type ContactForm, which will automatically be populated with the data submitted from the form.
Inside the action method, you can perform any necessary processing on the submitted data. For example, you might save it to a database or send an email. In this example, we simply redirect the user to a “ThankYou” page after processing the form.
Conclusion
In this article, we explored how to post a filled-in model back to the server using ASP.NET Core. We started by defining a model class to represent the data we want to capture. Then, we created a form in our view to capture the user's input. Finally, we implemented an action method in our controller to handle the form submission and process the submitted data.
ASP.NET Core provides a straightforward and efficient way to handle form submissions and capture user input. By following the steps outlined in this article, you can easily implement this functionality in your own ASP.NET Core applications.
