blogsstar.blogg.se - How to use input type file in jsfiddle

#How to use input type file in jsfiddle how to
#How to use input type file in jsfiddle code

Var canvasAspectRatio = canvas.width / canvas. Var imageAspectRatio = img.width / img.height

Var canvas = document.getElementById("image-canvas")

#How to use input type file in jsfiddle code

Why include a jsFiddle If you just add a few handfuls of raw code, anyone who wants to help has to create their own file and add your code to it in order to debug it.

#How to use input type file in jsfiddle how to

Set the image once loaded into file reader If you have any questions regarding how to use jsFiddle please just comment below, or read their docs. Var filesToUpload = document.getElementById('imageFile').files The following code compares the ratios and chooses to fit the image horizontally or vertically. And I hope to fit the uploaded image to the canvas depending on the aspect ratio. For this to look nice the img needs to be scaled to the canvas, otherwise it fall of the "canvas". Make sure you follow me on Twitter for more up-to-date news, articles and tips.Upon further testing it became clear that was I was seeing was the discrepancy between img size and canvas size.

( GHOST_URL/upload-files-in-asp-net-mvc-with-javascript-and-c/" target="_blank).

( GHOST_URL/upload-files-to-the-server-using-javascript-and-mvc-webapi/" target="_blank) Even if it sounds like a very simple task sometimes can take you a lot of times if you don't know the right way to get files from input type file using jquery.

You can find implementation to two ways below: It is important to note that there are many different ways to upload files to the server in MVC ASP.NET, so you should choose the one that better matches your requirements. To persist the file to disk, we get the filename and then use a FileStream to write the data to the destination path.īonus: the method can process multiple files within a single request, so you can change your input element to enable multiple file upload like this: The method accepts an id parameter (of type string) and reads the file data from the Request.

The MVC controller method is outlined below: The last step is to perform the ajax call which posts the data to the MVC contoller and logs the success to the console. We then create a new FormData object where we load all the file data. This method works by attaching an event listener to the textbox input element using jQuery and 'fire' on change, i.e when the user browses and selects a file(s). Now, lets add the javascript code to glue everything together: But an earlier version had a bug with it. For example, ColdFusion didn't in version. I'd say check the PHP code to see if it properly handles input/typefile/multiple. You can find information about the supported browsers here: HTML/Javascript code My JS code just adds a display layer - at the core it is one input/typefile tag. NOTE - make sure you check that your browser supports window.formdata before implementing this solution. The code example below takes advantage of jQuery and Ajax on the client side to post a file to an ASP.NET MVC controller and save the file on disk. But it only provides the name, the length, the content type but not the data itself. I tried: ('inputmyInput')0.files0 to retrieve the data. But there are a lot of situations where a form submission may not be desirable. Questions: I actually have a file input and I would like to retrieve the Base64 data of the file. Most of the examples I found out there require a form submission.

The goal is to upload a file to the server using just JavaScript and an MVC controller without submitting a form. Instead you can use an MVC controller to perform the same task. However, there's no reason to add a WebAPI only for file uploads. If you already have a WebAPI in your solution then you can simply extend it to manage file uploads. This works great but it means that you need to have a WebAPI controller to manage the requests. In an earlier ( GHOST_URL/upload-files-to-the-server-using-javascript-and-mvc-webapi/" target="_blank), I described how to implement a file upload using ( " target="_blank) and ( " target="_blank). Posted in ASP.NET, JavaScript, MVC, html, WebApi, c# Upload files in ASP.NET MVC with JavaScript and C#.