How Can I Pass Complex Models in Form Data for MVC Applications?

Passing complex model forms in the MVC application

In the MVC application, the transmission of the model as a form data as part of the form data may bring challenges, especially when processing the entire model set. This article solves this problem by providing a comprehensive solution.

Challenge: The model serialization in JavaScript

When trying to use to attach the model to the form data in the form data in JavaScript, the model is usually serialized as a string, resulting in "

" representation.

formdata.append("model", model) Solution: FormData serialization [object object]

In order to overcome this problem, please use the FormData construct function as follows the serialization model:

This method will automatically serialize models and any file generated by

element.

<code class="language-javascript">var formdata = new FormData($('form').get(0));</code>

Posted the form data to the controller

<input type="file">

Use AJAX to publish serialized form data to the controller:

On the side of the controller, define an operation to receive the form data:

If your model does not include

<code class="language-javascript">$.ajax({
  url: '@Url.Action("YourActionName", "YourControllerName")',
  type: 'POST',
  data: formdata,
  processData: false,
  contentType: false,         
});</code>

attributes, please use the following operation heavy load:

<code class="language-csharp">[HttpPost]
public ActionResult YourActionName(YourModelType model)
{
}</code>

Add other attributes

HttpPostedFileBase

If necessary, you can use the following methods to attach other attributes to the form data:

<code class="language-csharp">[HttpPost]
public ActionResult YourActionName(YourModelType model, HttpPostedFileBase myImage)
{
}</code>

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