I am trying to preview an image that the user is trying to upload. This is the code i am using.This is working fine in all major browsers, but i am wondering if there is a better way to achieve this without using session(even though i am clearing the session ) ? I don't want to use Flash.
@using (Html.BeginForm("UploadImage", "Home", FormMethod.Post, new { id = "fileuploadform", @enctype = "multipart/form-data" }))
{
<input id="fileupload" type="file" onchange="ChangeImage()" name="files" multiple>
<div id="preview">
<img src="#" id="imgThumbnail" alt="preview" />
</div>
}
<script>
$(function ChangeImage() {
$('#fileuploadform').fileupload({
done: function (e, data) {
var d = new Date();
$('#imgThumbnail')[0].src = "/Home/ImageLoad?a=" + d.getTime();
}
});
});
</script>
[HttpPost]
public ActionResult UploadImage(IEnumerable<HttpPostedFileBase> files, PostViewModel model)
{
Session["ContentLength"] = Request.Files[0].ContentLength;
Session["ContentType"] = Request.Files[0].ContentType;
byte[] b = new byte[Request.Files[0].ContentLength];
Request.Files[0].InputStream.Read(b, 0, Request.Files[0].ContentLength);
Session["ContentStream"] = b;
return Content(Request.Files[0].ContentType + ";" + Request.Files[0].ContentLength);
}
public ActionResult ImageLoad(int? id)
{
byte[] b = (byte[])Session["ContentStream"];
int length = (int)Session["ContentLength"];
string type = (string)Session["ContentType"];
Session["ContentLength"] = null;
Session["ContentType"] = null;
Session["ContentStream"] = null;
return File(b, type);
}
