how can we check file types (formats such as jpg) without using file extensions before -uploading them- in asp.net with c# ?
i am using vs 2008 + asp.net + c# + TELERIK Controls (RadUpload)
imagine that some body change the text file extension to jpg and select it in a upload conrol such as radupload ...
how can we recognize that this file is truely jpg or not?
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?
Is it possible to check if a validator is a 'validator' and not a 'custom validator' or 'required field validator'?
I'm looking for something like if(val.GetType() = 'validator') but dont seem to be having much luck.
I have a file uploader I would like to be able to have a folder added to the folder path on upload based on a textbox.text "MapPath("~/Uploads/" + Path.GetFileName(e.filename))"
I have Dim folder as String = textbox.text how do I add folder to MapPath("~/Uploads/"
it currently checks for .xml files how can I add more .doc .gif etc
Dim savePath As String = MapPath("~/Uploads/" + Path.GetFileName(e.filename)) 'Validation for file extension If Path.GetExtension(e.filename).Contains(".xml") Then Return End If
How can i filter the file in the dialog box
View 3 Replies I have an application that allows admins to add types such as document types and training types that are in seperate tables with a foreign key in a transaction table.
When structuring my class I decided to go with an abstract-like pattern (without the factory methods though). So I have a Type abstract class that defines my Save, Delete, and GetList methods. I have a training type class that inherits this class. The thing is all types have 3 main properties - defined in the abstract base - but have different source tables and thus different store procedures in my DbCommand object. So basically I repeat setting up the same parameters on all the derived classes. I would like to implement the common stuff in the base but I am getting thrown off by the difference in data sources.
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.
View 1 RepliesIn my asp.net project i have a folder (folder name "Data").
I upload .pdf file and save the .pdf file in My Data folder.
In same day if i upload same name file then the previous file is overwrite without any message.
So I would like to know, how can i show a message like ("same name file is exit ,Do u want to replace it").
I need to know how many ways I can lock a file? Suppose a process has opened a file and reading or writing it, by this time another process try to open it and read or write, how many ways I can impose lock level on that particual file? So, that the data remain consistant.I'm using VS 2005 and OS is Windows XP or Windows 2003 Server.
View 3 RepliesI using coolite in my project. And upload files through the FileUploadField control. I have to add a filter for the file type, so that the user could see only jpeg and bmp files from the choose file dialog. Havent found how this can be implemented in the web.
View 1 RepliesI've dug around in the SDK and managed to connect to my instance of S3, go into my bucket and create an empty file, but can't figure out how to take a file from my computer and upload it. If I have dragged a file upload control onto the designer surface how do I set the properties for it in the code behind?(If I absolutely need to have a 3rd party uploader which should I use). Here is the code I have so far.
static string bucketName = "myBucket";
static string keyName = "sampleKey";
static AmazonS3 client;
protected void Page_Load(object sender, EventArgs e)
{
string accessKeyID = System.Configuration.ConfigurationManager.AppSettings["AWSAccessKey"];
string secretAccessKeyID = System.Configuration.ConfigurationManager.AppSettings["AWSSecretKey"];
using (client = Amazon.AWSClientFactory.CreateAmazonS3Client(accessKeyID, secretAccessKeyID))
{
// simple object put
PutObjectRequest request = new PutObjectRequest();
request.WithContentBody("this is a test")
.WithBucketName(bucketName)
.WithKey(keyName);
S3Response response = client.PutObject(request);
response.Dispose();
// put a more complex object with some metadata and http headers.
PutObjectRequest titledRequest = new PutObjectRequest();
titledRequest.WithMetaData("title", "the title")
.WithContentBody("this object has a title")
.WithBucketName(bucketName)
.WithKey(keyName);
using (S3Response responseWithMetadata = client.PutObject(request))
{
WebHeaderCollection headers = response.Headers;
foreach (string key in headers.Keys)
{
Console.WriteLine("Response Header: {0}, Value: {1}", key, headers.Get(key));
}
}
}
}
I have added validation to validate if the user has chosen .doc file or not. But I want to show only .doc files by changing the "files of type to .doc" in file upload window.
View 1 Repliesdoes someone know elegant way to hidde/prevent direct access to some filetypes or web site resources, but that this resources remain accessible from application.
For example that mp3's in Music folder on www.somesite.info cannot be accessed directly via url like [URL] With routing off course.
I want to limit the allowed uploaded file types to images, pdfs, and docs. What is the recommended way to approach this?
I assume checking the file extension alone is not enough, since an attacked can change the file extension as he wishes.
This is basically for a course management system for students to upload assignments and teachers to download and view them.
i Dont know how many types of asp.net websites.
ie. asp.net webiste types of categories.
Give me the deatiled Information.
I would like ask you for some ideas how can I write mechanism that will be automatically read files from folder. I don't know how to schedule the write task. I want to check for new file everyday and if the new file is in the folder read it.
View 2 RepliesI want to limit the allowed uploaded file types to images, pdfs, and docs. What is the recommended way to approach this?I assume checking the file extension alone is not enough, since an attacked can change the file extension as he wishes.I also thought about checking against MIME Type using PostedFile.ContentType.I still don't know if this is adding any further functionality than checking against file extensions alone, and if an attacker have and ability to change this information easily.This is basically for a course management system for students to upload assignments and teachers to download and view them.
View 2 RepliesExporting the GridView to various file types. I have got the PDF working great and also want to add Excel. When I use the code I get a message that the file I am trying to open is a different file format from the extension I am trying to open. If i click OK it opens and alls is fine. Trying to get rid of this errors so customers and sales staff doesn't see it. Excel is version 2010.
View 1 RepliesI retrieve movie path value from db . movies are flv file types. Is there any free control that I could assign it's moviepath value nad it stram flv movie while provide me with some thing like youtube.
I googled for it but most of the control like JW FLV Flash Video Player Control won't work.Does any one know any free flv player
On a web page, I need to allow users to input the path to a file (on shares on servers) - which will be stored in a database so I can subsequently display 'a list of documents that apply to this project'.If I put an input type="file" on the page, it makes it easy for the user to browse to the document ... but, when the form is submitted, the document will be uploaded to the server. I don't want the document, I just want the path.
How would you provide the functionality to allow a user to browse to a file so that you could record the path to the file without actually uploading the file itself?I just want to end up showing, on a web page, a list of files like:
myserverfolder20somefoldersomefile.doc
myserver2folder50somefoldersomefile2.doc
I need to give users an easy way to locate those files in the first place - without having to laboriously open Windows Explorer, find the file, and copy and paste the path. A file upload control gives you access to the path - which is what I need - but I don't want the file uploadedIf I do end up using a file upload control - I don't want to save the file on server - how can I dispose of it so I don't end up with hundreds of temp files?
I'm rather new to the topic of designing web applications, and during my attempts to create something i stumbled upon a rather tricky question. For my application I want to do a user control with which user will be able to select a file from a hard drive and upload details about this file. I dont want the user to send the whole file, just the details about it. For example lets say user selects a mp3 file. I dont want the whole song to be uploaded but i want the details about that song like the Author, on Album etc. Is something like this possible without uploading the whole file?
I tried looking up that topic on the internet but i found nothing... though i dont believe I am the first one with such a dilema;]
I have this concern that I never found out an answer to. If people are on a page on the site that are processing something on that page and at the same time I upload class and/or aspx and .vb page to the server while they are still processing, what happens? Will their data get corrupt? will they be using whatever was there before the new upload until they refresh their page? how does it work?
View 6 RepliesI'm completely new to web design and am looking to add the programming functionality to back the form I've created for my website, so hopefully someone can point me in the right direction.
I have a form that has both data and file fields and I need to be able to have the form contents transferred to a file on my server. I want the contents of the form to be accessible only to me when I access my server.
I don't really understand how ASP.net works but was hoping someone could either offer me the proper script or point me to a novice-level tutorial that will explain what I need to do.
I have a file upload control and just in IE 6 I get the following error when I try to upload a file. My code is further below.
Exception Details: System.Web.HttpException: '/Members/path//C:UsersPublicPicturesPhotosSample AlbumPensive Parakeet.jpg' is not a valid virtual path
MembershipUser newUser =
Membership.GetUser(CreateUserWizard1.UserName);
HttpFileCollection uploadedFiles = Request.Files;.......