Asp.net - Uploading And Downloading Files From A List Type?
Mar 2, 2011
I am using an ASP.NET FileUpload to upload files to the server.How to upload it to the rootfolder of my project. I want to add the files to a collection or list of files to be shown on the webpage in the form of gridview.Each file should have a link to itself in the list So that it could be downloaded by the click-if desired.The gridview will also have a delete column so that I can delete any of the corresponding file-as desired.
I want to download a list of files and report whether or not each file exists or contains certain qualifiers. The files are text/web documents, with maximum sizes of about 200 KB.
I am using a For loop to iterate through the links, which are placed in an array. The problem is that while my loop is going on, all of my forms become frozen and any status updates I want to show in my forms essentially do not show up because the UI is stuck.
Is there a better way to free up the UI than using DoEvents()? I recall from a previous post that the way my function is being called, it's being called from the UI thread,. Therefore I should just start a new thread so my UI thread doesn't get hung up downloading all the files? Or should I use a timer and download each file at a specific interval so that there's some downtime in between files that allows for me to change the status to tell the user that my program isn't stuck?
Edit and side question: I just realized something really...bad. Basically in my program I play around with DOM for a WebBrowser in my main form. I'm working with a lot of the elements in the document, but they don't always exist because each page takes time to load based on a user's internet connection speed. I WOULD HAVE used a While loop to check if certain elements exist or not, but in the past when I used VB6 I noticed that this causes massive program hangs...so I used a timer instead. But those hangs were the exact same type of hang I seem to be having with this downloading files business.
Now, I just moved from VB6 to .NETa few days ago. But I just read that the reason I used timers in VB6 was because VB6 didn't support multi-threading. So...for all of those instances where I should be using a While loop instead of a Timer, should I just place that While loop code in a new thread so the UI doesn't freeze up?
If so, I am greatly relieved and I can make my code 10 times less ugly. But I will also rip parts of my hair out because it took me like a 100 hours of debugging to get my really crappy timer code working.
This is my code so far:
Code: Private Function analyzeURLs() As Integer Dim k As Integer 'did we make it through without any errors?
do i make a program in visual studio winforms that when i upload files like (.docx,.doc, .pdf files, .swf files) it will stored into a folder.Second, i saw the files being uploaded in Winforms (something like "myDocuments"). Third, when i open the files it will show the file just like in .docx it will open in ms word, .swf it will open internet explorer, .pdf files it will open the .pdf files.
I am trying to import an excel file using asp.net and C#. I found an example in VB, but it is using something called "Server.MapPath" which is not resolving to a namespace. I am on .NET 4.0, C#, and windows XP.I found a "HttpServerUtility.MapPath", but I don't know if this is the equivalent for IIS7?
I am currently creating a FTPWebrequest to handle my uploading (the webrequest section of my function is below). At the moment my code loops through this webrequest section for each file - giving the file path of each file in the string "CompleteLocalPath". For each file it creates a webrequest and giving the required file path, uploading the file using a file stream, and then closing the stream. This works, but seems to take quite a long time. Can you recommend a more efficient way? Perhaps by using one webrequest but modifying the upload path?
I want to upload files from particular location. I got problem with GetRequestStream() function. Here is the Dim path() As String = Directory.GetFiles("C:files") 'I tried and with("C:/files/") For Each files As String In path Dim ftprequest = DirectCast(WebRequest.Create("ftp://" & FTPHost & "/" & files), FtpWebRequest) ftprequest.EnableSsl = True ftprequest.Credentials = New NetworkCredential(user, password) [Code] .....
Error message is: The remote server returned an error: (500) Syntax error, command unrecognized. When I tried with My.Computer.Network.UploadFile(...) I got this error: The remote server returned an error: (550) File unavailable (e.g., file not found, no access).
[code]I would like someone to kindly ajust it so instead of uploading from the "Downloaded Songs" in the application files, i would like it to upload from the user's "My Music" Folder
I have trying to upload some large files using FTP. Here is the code I am using below.
Private Sub UploadFTP() ' Open file.txt with the Using statement. Using r As StreamReader = New StreamReader("list.txt")[code]....
I basically loop the above to upload all the files in a specific directory. This works fine with small text files,but when I try uploading a large 30+- mb file it gives me an error.
Quote: The underlying connection was closed: An unexpected error occurred on a receive.
On
cls_stream.Close()
I understand this is caused by .Net not communicating with the server properly? I tried searching all morning to only get confused by all the different methods.
I need to upload a file and rename it. I have found a lot of code that uses the WebRequest for this. I was wondering if there is another method that logs in to the ftp server and will stay connected while I upload files. I am doing this for a webcam application and it seems another method would be quicker than using the credentials each time I need to upload and then rename the file.
I have a file uploading and viewing page in ASP.Net 1.1 using VB. Now the page will be visible in intranet as well internet. Here in my case the intranet and internet servers are different. How can i save the uploaded file in the intranet server and view from there subsequently when the activity is done using the internet server?
I need to upload a large set of files and directories to my web server, all of the files that I want to upload to my server are located in "C:Files_To_Upload" directory, it contains thousands of files and maybe 100 directories/sub directories so I don't want to have to specify each specific sub folder and file - jmcilhinney's ftp example which I am currently working with shows a way to upload all of the files from a specific directory, but not subfolders and their files. How can I get it to also upload the sub folders and their files?
Code I am using based on jmcilhinney's threaded ftp example:
Private Sub UploadFolder(ByVal source As String, ByVal destination As String) For Each file As String In IO.Directory.GetFiles(source) Threading.ThreadPool.QueueUserWorkItem(AddressOf UploadFile, _
I need to upload multiple files in a winforms application. So far I've been using a webclient and while this is working fine I'm wondering if there is a better way for doing this. Does the webclient make a new connection for every request or does the connection persists between uploads?
Dim Ftpclient As New System.Net.WebClient()Ftpclient.Credentials = New System.Net.NetworkCredential(username, password)
Dim Files As New Dictionary(Of String, String)Fill dictionary with items for upload here
For Each RemoteFile As String In Files.Keys Ftpclient.UploadFile(RemoteFile, Files(RemoteFile))Next
I have built working VB.net code that uploads multiple images to the server using Plupload. I am using an HTTPHandler (FileUpload.ashx) to do the uplading and want to add a SQL Statement that will insert each of the images File Names to my SQL Database. I have tried just adding the SQL to the Handler, but when I do I get 4 database entries for each iamge that is uploaded.
Pertainant HANDLER code: Public Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest
I'm totally new at web-programming and haven't got a clue where to start looking.I'm writing a .NET exe using VB.NET 2003 and it has to do 3 things online.1) it has to read contents of online textfiles (this works, I'm using WebClient)2) it has to upload local textfiles to a webspace (doesn't work 404 error)3) it has to append lines of text to a existing textfile on the webspace (this is not important right now, fix 2 first)What approach do I need to take? I have been unable to find any good articles on this, everyone uses an ASP.NET app, but that cannot be done in my case.
I have wrote a routine to upload a database file to a server using webservice which works fine until I try and send a large file. It errors all the time saying the connection was disconnected. how to upload large files?
I have some exe files that I've uploaded into my database as I don't want them to be publicly accessible. I tried using a link button and a generic handler to serve the file using the following code:
The problem: Google Chrome does not treat the download as any other exe, instead after downloading it reports "program.exe is not commonly downloaded and could be dangerous." with a "discard" button and the option to "keep" the download is hidden under a context menu.
Im currently working on a program that will download some files and place them inside a folder. The tricky part is that the folder they have to be puttet into is a .jar file. The jar file is always the same place, and that is in %appdata% the full location would be "C:UsersBrugerAppDataRoaming.minecraftinminecraft.jar". With "minecraft.jar" beeing the destination for the files
Ps. Im trying to create a mod installer, since some people are having a little trouble installing mods for minecraft. Minecraft can be found at [URL]
I have been trying to download the file from a virtual directory ( which is pointing to some other location) within the web-folder. I have implemented 2/3 ways on doing that, but none of the ways download the file. The asp .net page is not even showing the error, its showing a blank screen. One of the pice of code I implemented is:
All im trying to do is make a program that downloads all the files i want offline and but them in a folder, but when i go to the folder and look at the downloads they are all empty,
I have about 170 files on the server with the sameending Eix and EPK in the "pack".It would have to withdraw all my files to a predetermined folder "pack".
I am using the web client to download a file. Which works ok. However, now I have to download many and the number of files to download will change everyday. I am not sure how I can get the web client to know which files have been downloaded or not? I was thinking of using a for loop to download each file. But I will never know how many there are to download? The web client could download the same file twice?
I've come up with a way of downloading multiple files specified in a txt doc held on a web server. The problem is it only downloads files not folders, im using the following from the codebank to download the files currently:
Try mCurrentFile = GetFileName(URL) Dim WC As New WebClient WC.DownloadFile(URL, Location) RaiseEvent FileDownloadComplete() Return True Catch ex As Exception RaiseEvent FileDownloadFailed(ex) [Code] .....
Can I modify this to allow downloading of folders too or will I have to use a completely different method?
I'm trying to code a program that can download multiple files at once (on different threads of course). I have created a custom listview component that will allow me to add a progressbar directly to it. What my real question is, how can i take a url given by the user from an input box and create a new webclient to handle the downloadasynchronously
[URL]..it just comes up with an error. am i doing it right? and is there any way i can just download it to the same folder that my program is in no matter what computer its on?
im trying to write an updater for my program and im checking the version by downloading a .txt file. however its coming out blank. this is the first time ive done something like this so i probably noobed something bad.[code...]
Basically I want to create a little program with 5 or so text fields where I enter the specific names of movies. Upon pressing a "go" button it then does a google search(with certain criteria) for all textfield entries on the website [URL} and then download the files, if possible without opening a browser.
Search criteria: -only video formats(.avi .mov etc) -download url contains the "_de" tag (to insure german trailers)
That way it should hopefully find the right trailer and download it. If possible have it use progress bars.
How much work do you think this is? Or is it even possible? From a logical standpoint I don't think it's too much work... I am using Microsoft Visual Studio 2008 Express Edition. My project currently is just full of test code but I will post it anyway:
Code: Public Class Mainwindow Private Sub Mainwindow_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
