model binding in asp.net mvc-IGI

Model binding is a process in ASP.NET MVC where the values of incoming HTTP request data are mapped to the properties of a model object. This allows you to easily retrieve and work with user input in your controllers.

ASP.NET MVC provides automatic model binding for simple data types, such as strings and integers, as well as more complex types, such as custom classes and collections.

To use model binding in ASP.NET MVC, you need to follow these steps:

Define a model class that represents the data you want to retrieve from the user.
Create an action method that accepts the model object as a parameter.
Include form controls in your view that correspond to the properties of the model object.
Use the HTML form tag helper to generate the form tag with the appropriate action and method attributes.
When the user submits the form, the values are automatically mapped to the properties of the model object.

Here is an example of how to use model binding in ASP.NET MVC:

Define a model class:

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public class Contact
{
    public string Name { get; set; }
    public string Email { get; set; }
    public string Message { get; set; }
}

Create an action method that accepts the model object as a parameter:

[HttpPost]
public IActionResult Contact(Contact contact)
{
    if (ModelState.IsValid)
    {
        // Save the contact information to the database or send an email.
        return RedirectToAction("ThankYou");
    }

    // If there are validation errors, redisplay the form with the error messages.
    return View(contact);
}

Include form controls in your view that correspond to the properties of the model object:

@model Contact

## Contact Us

<form asp-action="Contact" method="post">
    <div class="form-group">
        <label asp-for="Name"></label>
        <input asp-for="Name" class="form-control" />
        <span asp-validation-for="Name" class="text-danger"></span>
    </div>
    <div class="form-group">
        <label asp-for="Email"></label>
        <input asp-for="Email" class="form-control" />
        <span asp-validation-for="Email" class="text-danger"></span>
    </div>
    <div class="form-group">
        <label asp-for="Message"></label>
        <textarea asp-for="Message" class="form-control"></textarea>
        <span asp-validation-for="Message" class="text-danger"></span>
    </div>
    <button type="submit" class="btn btn-primary">Send</button>
</form>

Use the HTML form tag helper to generate the form tag with the appropriate action and method attributes:

<form asp-action="Contact" method="post">

When the user submits the form, the values are automatically mapped to the properties of the model object. In the action method, you can check if the model is valid and perform the appropriate action based on the result. If the model is not valid, you can return the same view with the error messages. If the model is valid, you can redirect to a different action or view.

tutorial

model binding in asp.net mvc