The first and simplest is: get a reference to the form element and pass it to the FormData constructor, like so:
#AJAX FILE UPLOAD EXAMPLE C# CODE#
You can verify if the client browser support the FormData or not using the below code function supportAjaxUploadWithProgress() Simple way to submit the complete HTML form using FormDataįormData gives us two ways to interface with it. You can read more about it from this reference Compatibility and detection
FormData.values(): Returns an iterator allowing to go through all values of the key/value pairs contained in this object. 
t(): It helps to set/update a new value to existing keys or add new key-value pair if doesn’t exist.FormData.keys(): It helps to get all keys present inside object.
FromData.has(): It returns a Boolean value whether a given key is present inside object. FormData.get(): It returns value of given key within FormData object. FormData.entries(): Returns an iterator allowing to go through all key/value pairs contained in this object. lete(): Deletes a key/value pair from a FormData object. FormData.append(): Appends a new value onto an existing key inside a FormData object, or adds the key if it does not already exist. The FormData interface provides a way to easily construct a set of key/value pairs representing form fields and their values, which can then be easily sent using the nd() method.It uses the same format a form would use if the encoding type were set to "multipart/form-data". There are many ways to upload files on server, but in this I will give you example to upload file using jQuery Ajax, if you want to use any eternal plugin like Dropzone.js you can read " File uploading using DropZone js & HTML5 in MVC" or if you want to Upload file using HTML.BeginForm, you can read my article " Uploading Files in ASP.NET MVC C# (Single & Multiple Files)"īefore we proceed further I will like to that about the way we will upload the files using jQuery Ajax, so basically we will be using FormData object.
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