Ajax File Uploader: Checking File Size Before Uploading To Server?
Dec 23, 2010
With the ajax file uploader, would it be possible to check the size of the image before uploading?Currently, it uploads the file to the server and then lets me know that it's bigger than the limit size.
i am using a file uploader to upload files. Now when i am using this on a mobile emulator with default browser IE it is uploading only those files whose name is less than 6 character. the files with name more than 6 character is not uploading through mobile emulator or mobile phone (PDA). I need this solution very soon.
I have figured out that javascript cannot obtain the filesize of a to-be-uploaded file because it is a security risk and it is not allowed access to the clients HD. But I want to see if it is possible to get the file size before uploading the file, perhaps using AJAX.
So by looking at the requests, when you click the submit button on a form that contains a input type=file, the Request actually has the filesize inside of it, so you could therefore get the first request, cancel the request there, and send the file-size data back to the client without actually uploading the file.
I want to do this via AJAX so that it doesn't post back and also without clicking the submit button. It seems impossible to create a submit request with javascript because there is no way to get the file size. But is there a way to fake a submit? How does the submit button get the information? Is there any documentation on how the submit button actually works?
I have an Async File Uploader control inside a Repeater which is inside an update panel. Now,I am uploading the file into ftp,so I am not uploading the video file,using SaveAs() method. For uploading the file in ftp,I have this UploadFile method which takes these four parameter:FileName, UploadPath, FTPUser, FTPPassword.Now this FileName,I have to send the full file path. My UploadComplete event looks like this:
<pre lang="cs">protected void AsyncVideoUpload_UploadedComplete(object sender, AjaxControlToolkit.AsyncFileUploadEventArgs e) {//VideoPath is a session variable VideoPath = string.Empty; if (AsyncVideoUpload.HasFile) { // string filepath = AsyncVideoUpload.PostedFile.FileName; string filepath = e.filename;//above two captures only the file name,but I want the total path,like c:/MyDocuments/... UploadFile(filepath, "ftp://172.20.117.102","test","Value*12"); VideoPath = AsyncVideoUpload.PostedFile.FileName; } }</pre>
i m uploading file using fileupload control. when i upload mp3 file with more than 4 MB size it gives error like page can not be displayed. how can i increase capasity of uploading file in my project.
I need to upload images from client to server as follows:
1. Server is passing the client a file name 2. Client is checking file extensins to ensure it's an image then issues a __dopostback to the server. 3. Server uses the FileUpload control to save the image on the server.
I have that all covered, but, if image is too large, the upload fails with the following error: 'System.Web.HttpException: Maximum request length exceeded.'
Is there a way to check file size on the client (without the use of ActievX which also errors out), before it is passed back to the server?
currently we are configured execution Timeout="1200" (The default is 110 seconds) and maxRequestLength="12288" (The default is 4096 KB)but some times users upload files above 12MB so we are getting "Maximum request length exceeded" error.we are checking the file size using client side javascript ActiveXObject object. but ActiveXObject only works in IE not in others like mozilla,crome,..Jacescript Code are
[Code]....
how can i check the file size before uploading process with support all the browser.any posiblities for checking file size before server side script/object?
I have written a website and let the user upload their photo. It also resizes the picture to 400 x 400 and crops automatically to the center part of the picture. All of this works good but each file is about 355K each for JPG and PNG file formats. I just tried GIF and it is 49K but the picture is grainy when saved this way. Is there any way I can get the picture to a smaller file size with keeping it at 400 x 400? I really thought PNG would be the way to go and was surprised by it being the same as jpg. I don't want to lower the quality either for JPG files.
i used the flajaxian file uploader. there is an example which i found that can use an external button to run the file uploader. the example is shown below. the current problem im faceing is that the button in the example is a HTML button adn when i change to an asp.net button the function cannot be called. any ideas how to get the asp.net button to work? serverside code
I've been using this setup for a while and it works great, however I'd like to integrate a drag and drop system into this so the user can just drag files into the browser window and have them upload that way.
I am using a Aynchronous file uploader control to upload files.when I click on browse file button it opens a default dialog box. But i want to open it for a folder which is created by me on my system is any way to do this.
Is there a way to add a file upload progress bar to the existing .net file uploader? I have an uploader on my site that has all kinds of things tied to it that I can't change to use an AJAX uploader. Or as far as I know I can't. So I was wondering if anyone knew how to add the progress bar to the asp.net uploader.
I am using Asynchronous File uploader ajax toolkit control.I want to get knowledge of whether page is posted back due to File uploader or not in Page_Load event of my aspx page.
For that i tried to use Page properties IsAsync, IsCallBack but even page is posted back on responce of File Upload these properties are false,only IsPostback property is True.
Why IsAsync and IsCallBack properties are false ?
I was thinking that since this control upload files Asyncronously, so atleast on File Upload IsAsync property should be True.But that is also false .
I have got an error "server response error : Unknown server error" while uploading file using Ajax AsyncFileUpload, code behind function is triggered while uploading, but after code behind function executed, we are getting this error.
I have got a page in which there is a file upload option where I have to upload/import the csv file. What I want to do is to check if the correct format of file is uploaded for instance if any other than csv file is uploaded, the system should give an error message. Also what I need to do is to check certain fields of the csv file for instance there are some mandatory fields in the csv file which should be there like name , postcode, How can I check that these fields are not empty . After performing these task, the system should automatically upload the csv file onto the sql sever 2008.
i ve deployed many applications with file uploading feature on dedicated server and never got any issue. but it is not working on shared sever :( .. i think Server.MapPath("~") is not working on shared server. as in shared sever i am unable to find those directories which must for uploading.
i am working on a project in which I want user to upload files on to my website so for that i created a folder in which i'll store all those stuffs.now the thing is that it is all working fine on localhost but when i use it on server ,,it provides an error which is
Access to the path 'C:inetpubvhostsebas.co.inhttpdocsuploadsfile.exe' is denied.
i think this probably has something to do with the access permission for the folder...So could you tell me what are the permissions required to be set for this job to be done on server.
while uploading the file on the local host it works fine.but the same coding does not work on the webserver. is there anything to do with the foldr read and write permissions.i m using the server.map for finding the path of the browsed file.
trying to upload from an .xls file to microsoft sql server.What i did was i upload the file to a folder in server and pick the record from the folder. This work on development machine but on getting to a iis server to test the application i got an error that was saying the root folder for the www root for the folder was not found.