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The following code shows how $.ajax() method can be used for this purpose. To send the selected files from the client to the server you can use different techniques but in this example you will use jQuery $.ajax() method for uploading the files.

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The following figure shows how the default web form looks after dragging and dropping files on the element.ĭefault web form after dragging and dropping files to the element How to Send Files to the Servere? The OnDrop() function stores the selected files in the global variable - selectedFiles and displays a message in the using the text() method that indicates the number of files selected. These two objects are available as a part of the HTML5 File API. The files object is of type FileList and each item of the FileList collection is of type File. The list of files dragged and dropped on the element is obtained using the files property of the dataTransfer object. The OnDrop() function is important since it handles the drop event. The OnDragEnter() and OnDragOver() event handler functions are simple and they merely prevent the event bubbling of the respective events. length + ' file(s) selected for uploading!' )

The event handler functions are shown below: The first parameter of the addEventListener() method is the event name and the second parameter is the event handler function. dragenter, dragover and drop using addEventListener() method. The ready() function wires three event handler functions to the respective events of the box element, viz. The code declares a global variable named selectedFiles for storing a list of selected files. addEventListener ( 'drop', OnDrop, false ) addEventListener ( 'dragover', OnDragOver, false ) īox. addEventListener ( 'dragenter', OnDragEnter, false ) īox. The following jQuery code shows how that can be done:īox = document. To handle the file drop operation you need to wire certain event handlers to the box element. Clicking on the button initiates the file upload operation. Merely dropping the files won't upload them to the server. The element is intended to drop the files dragged from the local machine. Īs you can see, the consists of a element and a button. Drag & Drop files from your machine on this box. The HTML markup of the default web form is shown below: To understand how files can be selected using the drag and drop features of HTML5, let's develop a new ASP.NET web forms application. You can then access the dropped files using the dataTransfer object available to drag and drop events.

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Another alternative offered by HTML5 is dragging one or more files from Windows Explorer or Desktop and drop them onto some predefined HTML element of a web page.

ASP.NET web forms wrap the file field into the FileUpload server control and ASP.NET MVC applications can use an element with type attribute set to file. Traditionally you use the HTML file field to select files that are to be uploaded to the server. This article illustrates how the HTML5 drag and drop feature can be used to upload files on the server. The files can then be uploaded to the server. Using this feature you can drag files from Windows Explorer or Desktop and drop them on a predefined area of a web page. In addition to the file field, HTML5 also allows you to select files using drag and drop.

The selected files are uploaded to the server using form submission techniques. ASP.NET web applications that require uploading files from the client machine to the server use the file field to select files.