How to Pass a Complete Model via FormData to an ASP.NET MVC Controller?

Passing a Whole Model through FormData and Receiving It in MVC

In ASP.NET MVC, it is often desirable to pass a complete model object through a form to the controller. However, simply appending the model to FormData will result in it being received as a string in the controller, rendering it unusable.

Solution:

To effectively pass a model through FormData, the following approach can be adopted:

1. Serialize the Model:
   Utilize jQuery's FormData function to serialize the model. This will convert the model into a FormData object, which can include both model properties and file inputs:

   var formdata = new FormData($('form').get(0));

2. Post the FormData:
   Send the FormData object via an AJAX POST request:

   $.ajax({
     url: '@Url.Action("YourActionName", "YourControllerName")',
     type: 'POST',
     data: formdata,
     processData: false,
     contentType: false,  
   });

3. Receive the Model in the Controller:
   In the controller action, accept the model as a parameter of the appropriate type:

   [HttpPost]
   public ActionResult YourActionName(YourModelType model)
   {
   }

4. Optional: Handling Additional Properties:
   If the model does not contain properties for additional form data, you can append them manually:

   formdata.append('someProperty', 'SomeValue');

By following these steps, you can effectively pass a model through FormData and receive it in your MVC controller in a usable format.

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