Introduction:
Here i will explain File upload using HTML5 drag and drop in Asp.net.
Description:
previous article i will explain html5 some tag. now here i will explain file upload drag and drop in asp.net.
ASPX:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Upload.aspx.cs" Inherits="upload.Upload" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<style>
body { padding:10px; font:14px/18px Calibri }
.bold { font-weight:bold }
td { padding:5px; border:1px solid #999 }
p, output { margin:10px 0 0 0 }
#drop_zone
{
margin:10px 0;
width:40%;
min-height:150px;
text-align:center;
text-transform:uppercase;
font-weight:bold;
border:8px dashed #898;
height: 160px;
}
</style>
<title></title>
<script>
var files;
function handleDragOver(event) {
event.stopPropagation();
event.preventDefault();
var dropZone = document.getElementById('drop_zone');
dropZone.innerHTML = "Drop now";
}
function handleDnDFileSelect(event) {
event.stopPropagation();
event.preventDefault();
/* Read the list of all the selected files. */
files = event.dataTransfer.files;
/* Consolidate the output element. */
var form = document.getElementById('form1');
var data = new FormData(form);
for (var i = 0; i < files.length; i++) {
data.append(files[i].name, files[i]);
}
var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function () {
if (xhr.readyState == 4 && xhr.status == 200 && xhr.responseText) {
alert("upload done!");
} else {
//alert("upload failed!");
}
};
xhr.open('POST', "Upload.aspx");
// xhr.setRequestHeader("Content-type", "multipart/form-data");
xhr.send(data);
}
</script>
</head>
<body>
<form id="form1" runat="server" enctype="multipart/form-data">
<br />
<div id="drop_zone">Drop files here</div>
</form>
</body>
<script>
if (window.File && window.FileList && window.FileReader) {
/************************************
* All the File APIs are supported. *
* Entire code goes here. *
************************************/
/* Setup the Drag-n-Drop listeners. */
var dropZone = document.getElementById('drop_zone');
dropZone.addEventListener('dragover', handleDragOver, false);
dropZone.addEventListener('drop', handleDnDFileSelect, false);
}
else {
alert('Sorry! this browser does not support HTML5 File APIs.');
}
</script>
</html>
CS:
using System;
using System.IO;
using System.Web;
namespace upload
{
public partial class Upload : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (IsPostBack)
{
UploadFile(sender,e);
}
}
protected void UploadFile(object sender, EventArgs e)
{
HttpFileCollection fileCollection = Request.Files;
for (int i = 0; i < fileCollection.Count; i++)
{
HttpPostedFile upload = fileCollection[i];
string filename ="c:\\Test\\" + Path.GetRandomFileName();
upload.SaveAs(filename);
}
}
}
}
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