AJAX :: Understand The Following Javascript Relate To AsyncFileUpload Control?
May 26, 2010
in my current project I used a AsyncFileUpload control from AJAX Control Toolkits. After I got the async file upload part working, I needed to filter the file type so users can only upload image files. I found the following code off web and it worked well:
[Code]....
The problem is : I don't understand this javascript. What is the type of args parameter? Where are the methods such as "get_fileName()", "set_cancel()" defined? I went to the homepage of the
AsyncFileUpload control but couldn't find any documentation regarding the "args".
I used a AsyncFileUpload control from AJAX Control Toolkits. After I got the async file upload part working, I needed to filter the file type so users can only upload image files. I found the following code off web and it worked well:
function uploadStarted(sender, args) { var filename = args.get_fileName(); var filext = filename.substring(filename.lastIndexOf(".") + 1); if (filext == "jpg" || filext == "jpeg" || filext == "gif" || filext == "bmp") [code]...
I have a requirement, where-in once a file is upoaded using the AsyncFileUpload control, I want the name of the uploaded file to be removed from the AsyncFileUpload control and it should show blank (as it was when the page was first loaded). Also, the control should allow uploading the same file immediately after the first upload is complete(assuming that the user deciedes to update the file after the first upload and wants to immediately upload the updated version of the file).
I have an asyncfileupload control within a panel control. The panel is initially set to visible=false on page load. After a user clicks a button to display the panel contents however, I set the panel to visible and the user can then use the asyncfileupload. The problem however, is it seems much of the javascript associated with the asyncfileupload, does not function properly when the panel containing the upload control is set from invisible to visible. If I set my panel's "visible" property to "true" initially, then it works fine. My javascript error message is as follows:
"Form contains a file input, but is missing method=POST and enctype=multipart/form-data on the form. The file will not be sent."
Basically within my asyncfileupload control, I have the following line:
[Code]....
In this scenario, my "args" variable is always null (when I set my pane's "visible" property to "true" on page load, the args variable DOES contain data. Any idea why switching a panel from visible=false to visible=true, would cause an error like this?
i m Uploading File using  Ajax AsyncFileUpload control.. after successful upload i am trying to display success message through Label and Also through Alert but its not working..below is i used code
i am new to this ASP.NET and AJAX.I am trying to learn AJAX. I Have one doubt.what is the difference between normal file upload control and ajax AsyncFileUpload Control ..?
I have an updatepanel to which I am adding a web user control dynamically. This web user control has an AsyncFileUpload. I have read several articles that tell that asyncfileupload control will not work if added at run-time. As suggested by some of the articles,I tried adding a static asyncfileupload control but still it does not work.I need to have 5 file upload controls in the web user control. Do you think I can make them to work or should I completely do a re-design or go with full postbacks. My preference is to be able to use asyncfileupload control and I am willing to invest time in making them to work since they improve the user experience by many folds.
I am using an AsyncFileUpload control in my asp.net page.This control in inside an update panel.Any post back(like some treeview loading,combo selection in which i needs postback) appear in that page makes the AsyncFileUpload control text area gets cleared.Is there any solution to retain the selected file name in the AsyncFileUpload control after the postback.
I can't get my <ajax:asyncfileupload> working and I don't see why...
When outside any panel or table it is working well, but as soon as I put it in a <asp:panel> or table I get a strange error which seems to be on client-side but I don't understand what's happen here. Here is the code and code-behind and Javascript.
Here's the error:
[URL]
Here's my front-code:
[Code]....
Protected Sub fupAjoutLogo_UploadedComplete(ByVal sender As Object, ByVal e As AjaxControlToolkit.AsyncFileUploadEventArgs)
I'm using AsyncFileUpload, when i upload a file all works fine, but when upload finish, i want to upload another file with the same control, but not work, always enter in the uploadError event, i dont know why. ¿What can i do for reset the control?
Before I get started on this venture, does anyone know if there is someway to implement a progress bar with the AsyncFileUpload control?
And does anyone have any good links for how to start using the control? The website's "tutorial" page is about 2 lines long.
Why does it seem so hard to get a progress bar working? I don't want to download any 3rd party software or precompiled ProgressBar controls I just want to make one :(
I'm using the AsyncFileUpload control inside my FormView (that is in a UserControl - .ascx file), and to "simulate" a server-side event I register a javascript script to do a click event of an hidden button (this is a trick discovered in this forum).
The click event is fired after the upload complete but... when the event is finished the AsyncFileUpload ontrol DISAPPEARS from the page and it is showen this instead:
I'm using the AsyncFileUpload control inside my FormView (that is in a UserControl - .ascx file), and to "simulate" a server-side event I register a javascript script to do a click event of an hidden button (this is a trick discovered in this forum). The click event is fired after the upload complete but... when the event is finished the AsyncFileUpload ontrol DISAPPEARS from the page and it is showen this instead:
"11294------image/pjpeg"
Very strange behavior... is there somethings to set to solve this problem?
i use a asyncfileupload control to upload files from my web pages. since i have a listview inside an update panel, and the listview needs to have the file upload functionality, i can not use a asp fileupload control.
the uploaded files are saved inside a temp folder in my application directory. i use a asp:button to upload files from the asyncfieupload control to my temp folder.
as long as i work on my local machine, the upload control inside the listview works perfectly fine, and does what is expected of it (i.e upload files :))
but when i move the code to my web server the asyncfileupload onthe page works just once, that is, it uploads just once (no matter whichever row of the listview it is) and for all other subsequent uploads, it uplaods a file of the same name to my temp folder but with 0KB size.
it beats me why asyncfileupload control would behave this way in the two environments.
could anyone suggest a possible reason/or something i m missing to configure on the server?
-master page with updatepanel - within the update panel is a contentplaceholder -aspx page that uses the master page which contains aysncfileupload,a button,an image,and a label
what i'm trying to accomplish:
when a user uploads a file using the asyncfileupload it gets saved to a public folder.-this works as it should when the user presses the button the file is processed and should display the image and label (which were previously not visible)-this does not what happens is that the file gets processed but the image and label stay hidden,and i cannot figure out why.here's the aspx page and code snippets:
[Code]...
the file gets uploaded,and it even hits the two lines which should make the label and image visible but they stay hidden.i know that if you try to change controls with the afuExcelUsers_UploadedComplete event,they will not happen since the asyncfileupload only does a partial postback. this is why that event (afuExcelUsers_UploadedComplete) only saves the file on the server.then pressing the button triggers a different event and should do a "postback" and have control over the label and images visibility and other properties.
I have downloaded your asynchronous file upload source code it will work only in below IE8 and chrome.. but IE9 and FF will not work... I am using VS2010...
If I click the select button it won't come popup...
Is it actually possible to change the button text on the AsyncFileUpload control from "Browse" or "Select File" to something else without having to modify the control's source code? it seems I have to apply all sorts of hacks and workarounds for such a simple requirement. I fail to understand the authors of this brilliant control haven't thought about this (or is it too complicated for them to do it). and also Is it possible to have two buttons one for selecting the file and one for uploading?. because it is confusing if the user thinks if he is simply selecting the file where as it does the upload as well. at least if I can change the caption to "browse and upload" that makes it clear. I think these two functions are merged now without giving any ability for the user to separate them if he wishes to do so. if there is a simple workaround at least if there is no straight forward way to achieve this.
