I am trying to retreive an image from the path stored in sql database. When I try to load the http request, I get the image, but when I try to save it on a network path and retrieve that, i do not get an image
When, i write my image shared location to the browser, it works.
file://networkshared1/Try/Image1.jpg
When, I save this url to the database and retrieve it, I do not get anything.
C# code:
Image1.ImageUrl = "file://networkshared1/Try/Image1.jpg"; //DOES NOT WORK
Image1.ImageUrl ="http://something;" //IT WORKS
Look at the following steps:
Add Virtual Directory to your application in IIS
Give it an alias.In your case this would be your network folder here.
you can see the virtual directory now.
check under which app pool the app is running
Go the respective app pool. In my case it is running under the admin account (not good! but I have all access rights :-))
Add the app pool account to the ACL list of the network folder and give it the respective rights.
Now you can access the file in your application via http as you can see in the url:
Related
I want to read file names of pdfs from a folder on a network share that match certain parameters and provide a link to view them on a details page for my model. All I need to get is the file name. I don't need any file management/read/write at this time.
I'm able to display a .pdf in the browser if I have the path (IE will open "file://" links). The part I'm missing is getting file names from the remote (but same domain) directory at run-time.
We've set up a virtual directory for the app to use and that has worked fine in the past if the resolved physical folder is on the same server, but that is not the case here.
I've tried Impersonation, but that doesn't seem to work as I'm still getting an access is denied error.
I realize this would probably be a security issue and is why it isn't allowed, but is there an IIS configuration or other avenue that needs to be set-up to allow this? I can't seem to find a way with just code that opens the directory for reading.
Example code of how I might normally read some info from one file in a virtual directory:
// This example code is inside a controller action, so Server refers to HttpContextBase
var path = Server.MapPath("~/MyVirtualDirectory/" + fileName);
var fileExists = System.IO.File.Exists(path);
var fileLastModified = System.IO.File.LastWriteTime(path);
To enumerate over matching files in a directory, I've used DirectoryInfo
var pdfFileNames = new List<string>();
var dir = new DirectoryInfo(Server.MapPath("~/VirtualDirectory/"));
var pdfs = dir.EnumerateFiles("*.pdf");
foreach (var pdf in pdfs)
{
pdfFileNames.Add(pdf.Name);
}
As I mentioned, these methods work fine when the physical folder is on the same server, but once the directory is on a remote drive, then it no longer works. I have permissions to open the desired directory and my collegue said he gave the appropriate permissions to the virtual directory and server. Not sure what else to try at this point.
Edit: Now that it is working, I display the files using the Virtual Directory
http://server/appName/virtualDirectory/pdfFileName
By default, IIS application pools run under a specific local Windows identity named IIS APPPOOL\[NameOfYourAppPool]. This is a local user and it will not be possible to grant permissions to this identity to access resources located on a different machine.
If both servers are inside the same domain, you can try the following solutions:
Run the IIS application under a domain user and grant the required permissions to this domain user.
Run the IIS application under the NetworkService identity and grant permissions to the DOMAIN\MACHINENAME$ account of the IIS server.
i have an application which requires access permission to a file on remote server.
My app is in Server A, and the file i want to access is in Server B. These 2 servers are in the same domain.
I created a virtual directory in Server A for the directory in Server B. The name of virtual directory is FolderFromServerB and its path is \ServerB\Folder. I use a user for auth, and when i test the connection in IIS it says all is OK.
Also, when i put an anchor tag in a test file like below, i can access the file and the content is shown in the page:
Test file --> **This works**
But my problem is when i use code in order to if that file exists or not, it always returns with False. My code is like below:
FileInfo fi = new FileInfo(#"\FolderFromServerB/test.txt"); --> This doesn't work
Response.Write(fi.Exists); --> This always 'False'
I granted 'Full Control' permission to my user& NETWORK SERVICE & Everyone & Administratos in Server B but i didnt work neither.
How can i make it work?
It was working last week. I guess the server updated itself and some updates made that occur, but i couldn't find any workaround. Im so desperate now and i have to change all of my code and spend much time to make it work.
I found the workaround that is in web.config :
<identity impersonate="true" userName="{domain}\{username}" password="{password}"/>
I used File.Exist() for a few months, but then suddenly it was gone and didnt work, and i dont know why. But it is the solution above.
Your code does not work because the current execution folder of an ASP.Net application is not the folder of you application, but c:\windows\system32.
When you create the FileInfo object, you will try to read c:\windows\system32\FolderFromServerB\test.txt.
The <a href="FolderFromServerB/test.txt"> works because the link will be relative to the current page (it won't works if the page is in another directory).
If the file you are looking for is under your application directory, you can convert a virtual to a physical path using :
string actualFilePath = HttpContext.Current.Server.MapPath("~/FolderFromServerB/test.txt");
FileInfo fi = new FileInfo(actualFilePath);
I have an application, it first maps a network drive using credentials entered by a user. The drives successfully map, however when it tries to run a program from Process.Start(). I get Directory Name is invalid.
From my research I've read to put the working directory for when using a username/password in the StartInfo. However this doesn't work. The working directory is a mapped drive. Before this starts I do a if (File.exists(w:\folder\filename)..Process.start....
I tried to hardcode the working directory to C:\ but it still failed as it stated it could not find the file.
So when running the Process.Start as another user you cannot use a network path, even though that path was mapped by the same account? Am I forced to download the app locally so the Process.Start can work properly?
Any help would be greatly appreciated.
You are correct, network shares are a per user token. Running a process as another user (or as the same user in a elevated state) causes a new user token to be created and therefor all active shares are "unmapped" from the perspective of the new process.
You have a few options. The first thing I would try using is use the full UNC path instead of a mapped network drive letter. It may just work if you try that (the new user you are running as will need permissions to connect to the share)
If you are forced to use a drive letter instead of a UNC path then write a small loader program that you launch as the new user, have that map the network drive in the context of the new user token, then start up your program that relies on the drive.
P.S.) Using C:\ did not work as the working directly likely because C:\ is a protected folder that only administrators can write files to. If you created a sub folder C:\MyTestFolder\ and set the proper permissions on it I bet it would have worked.
I have the following code:
var saveFolder = Path.Combine(Properties.Settings.Default.DropBoxFolder, guid.ToString("N"));
// Create folder, if it does not exist (for the first attachment, it shouldn't exist)
if (!Directory.Exists(saveFolder))
{
Directory.CreateDirectory(saveFolder);
}
var saveFilePath = Path.Combine(saveFolder, file.FileName);
file.SaveAs(saveFilePath);
I'm using GUIDs to generate folders for uploads on my IIS server. The .NET web application is configured to impersonate the user. I granted modify permissions to the target folder (it is a local path on the web server) for Domain Users, Local Service and Everyone, but some users still can't upload files. I can and other people on my team can.
The weird part is that the exception says this:
Could not find a part of the path 'C:\Users\USERID\Desktop\FILENAME'
That path is the path to the file the user selected to upload (their local file path). I feel it is safe to say that the user has permission to his own file on his own desktop. I don't use user impersonation much, so I am wondering what I missed in my configuration or permissions. Any suggestions for debugging this issue? Thanks!
Note: the CreateDirectory method works just fine, even when the exception is thrown. I would have thought that if the user didn't have permission the directory creation would have failed first.
I have an Azure web role and a separate computer. Both of them are on the same network and both share certain folders which the other can access. If I go on my Azure web role, through remote desktop, I can go to the other computer's shared folder using \\comp1\folder and add/remove/edit files there.
I have a few image files on my web role which I need to copy to the separate computer.
These images are uploaded to the web role and stored there.
How can I copy those images that are on the web role, to my other computer?
I have tried using File.Copy but it always gives me Access Denied errors.
I tried doing:
File.Copy(Server.MapPath("~/image/a.jpg"),#"\\comp1\folder\b.jpg");
Result: UnauthorizedAccessException
I don't think you can access the file system on Azure like that, except through Local Storage?
To quote Bill Wilder
Any of your code running in either (a) ASP.NET (e.g., default.aspx or
default.aspx.cs) or (b) WebRole.cs/WorkerRole.cs (e.g., methods
OnStartup, OnRun, and OnStop which are derived from RoleEntryPoint
class) will not have permission to write to the file system.
You can read and write to the Local Storage system
try
{
LocalResource myConfigsStorage = RoleEnvironment.GetLocalResource("myConfigs");
string s = System.IO.File.ReadAllText(myConfigStorage.RootPath + "myFile.txt");
//... do your work with s
}
catch (Exception myException)
{
... }
But having always used Azure with more than one instance I have never seen the need for local storage and used the blob store instead.
Read more: http://www.intertech.com/Blog/Post/Windows-Azure-Local-File-Storage-How-To-Guide-and-Warnings.aspx#ixzz26ce8rXpk