Appending and Receiving a Model in Formdata

To pass a model object as part of a formdata object and retrieve it in the controller, consider the following approach:

JavaScript:

1. Create a FormData object:

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

2. Convert the model to JSON using JSON.stringify():

   let model = {
     EventFromDate: fromDate,
     EventToDate: toDate,
     ...
   };
   const modelJson = JSON.stringify(model);

3. Append the JSON string to the formdata:

   formdata.append("model", modelJson);

AJAX Call:

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

Controller:

1. Decorate the action with the [HttpPost] attribute to indicate it receives HTTP POST requests.

2. Declare a parameter of the appropriate model type:

   [HttpPost]
   public ActionResult YourActionName(YourModelType model)
   {
     // Your code to process the model here...
   }

3. ASP.NET MVC will automatically bind the JSON model string to the appropriate model type.

This approach allows you to append the entire model as JSON data to the formdata and retrieve it in the controller as a model object, enabling you to work with complex models in a controller action.