We Keep Coding

Error: File operation not allowed. Access to route denied

I am working on a project that uses Silverlight, where I want to show PDFS files of a server path, but when I start debugging my code I find the following exception:
where I generate the flow in the following code:
System.Windows.Browser.HtmlElement myFrame = System.Windows.Browser.HtmlPage.Document.GetElementById("_sl_historyFrame");
if (myFrame != null)
{
DirectoryInfo folderPath = new DirectoryInfo(#"\\192.168.1.216\UploadFileMobilePDF\" + transfer.IdTransfer);
foreach (var file in folderPath.EnumerateFiles("*.pdf", SearchOption.AllDirectories))
{
myFrame.SetStyleAttribute("width", "1024");
myFrame.SetStyleAttribute("height", "768");
Uri uri = new Uri(folderPath + file.FullName);
string path = uri.AbsoluteUri.ToString();
myFrame.SetAttribute("src", path);
myFrame.SetStyleAttribute("left", "0");
myFrame.SetStyleAttribute("top", "50");
myFrame.SetStyleAttribute("visibility", "visible");
}
}
The error marks me when instantiating the DirectoryInfo class folderPath = new DirectoryInfo ()
I don't know if silverlight can't have permissions to server addresses

Your application likely doesn't have permission to access the files on the server you're trying to access.
Look into WindowsImpersonationContext for the most likely way around this. https://learn.microsoft.com/en-us/dotnet/api/system.security.principal.windowsimpersonationcontext?view=netframework-4.8
You'll want a class (say, "MyImpersonator") that uses WindowsImpersonationContext to log onto the server using valid credentials. There are too many details to present an entire solution, but using the class (defined elsewhere) to get a single file might look something like this:
using (var impersonator = new MyImpersonator())
{
string name = ConfigurationManager.AppSettings["name"];
string password = ConfigurationManager.AppSettings["pass"];
if (impersonator.LogOnCrossDomain(account, pass))
{
if (File.Exists(filepath))
{
byte[] content = File.ReadAllBytes(filepath);
}
}
}

Can I write a file to a folder on a server machine from a Web API app running on it?

I have this code in my Web API app to write to a CSV file:
private void SaveToCSV(InventoryItem invItem, string dbContext)
{
string csvHeader = "id,pack_size,description,vendor_id,department,subdepartment,unit_cost,unit_list,open_qty,UPC_code,UPC_pack_size,vendor_item,crv_id";
int dbContextAsInt = 0;
int.TryParse(dbContext, out dbContextAsInt);
string csvFilename = string.Format("Platypus{0}.csv", dbContextAsInt);
string csv = string.Format("{0},{1},{2},{3},{4},{5},{6},{7},{8},{9},{10},{11},{12}", invItem.ID,
invItem.pksize, invItem.Description, invItem.vendor_id, invItem.dept, invItem.subdept, invItem.UnitCost,
invItem.UnitList, invItem.OpenQty, invItem.UPC, invItem.upc_pack_size, invItem.vendor_item, invItem.crv_id);
string existingContents;
using (StreamReader sr = new StreamReader(csvFilename))
{
existingContents = sr.ReadToEnd();
}
using (StreamWriter writetext = File.AppendText(csvFilename))
{
if (!existingContents.Contains(csvHeader))
{
writetext.WriteLine(csvHeader);
}
writetext.WriteLine(csv);
}
}
On the dev machine, the csv file is saved to "C:\Program Files (x86)\IIS Express" by default. In preparation for when it is deployed to its final resting/working place, what do I need to do to get the file to save, e.g., to the server's "Platypi" folder - anything special? Do I have to specifically set certain folder persimmons to allow writing to "Platypi."
Is it simply a matter of changing this line:
string csvFilename = string.Format("Platypus{0}.csv", dbContextAsInt);
...to this:
string csvFilename = string.Format(#"\Platypi\Platypus{0}.csv", dbContextAsInt);
?

In the case of the IIS folder the application has rights to write in there. I suggest to write files to the App_Data folder.
When you want to save files outside the IIS application folder you have to give the service account of the IIS application pool (I think it by default is NETWORKSERVICE) the appropriate rights on that folder.
As requested by B. Clay Shannon my implementation:
string fullSavePath = HttpContext.Current.Server.MapPath(string.Format("~/App_Data/Platypus{0}.csv", dbContextAsInt));

Thanks to Patrick Hofman; this is the exact code I am using, and it is saved to the project's App_Data folder:
public static string appDataFolder = HttpContext.Current.Server.MapPath("~/App_Data/");
. . .
string csvFilename = string.Format("Platypus{0}.csv", dbContextAsInt);
string fullSavePath = string.Format("{0}{1}", appDataFolder, csvFilename);

WebClient Download - "Access to the path 'c:\\windows\\system32\\inetsrv\\MyPrintManager.exe' is denied"

I am attempting to download a file from another IIS site on my local machine. I have my main website that is trying to download from another public site that contains a few files that the user will be able to download.
[HttpGet]
public ActionResult DownloadMyPrintManagerInstaller()
{
bool success;
try
{
using (var client = new WebClient())
{
client.DownloadFile(new Uri("http://localhost:182//MyPrintInstaller.exe"), "MyPrintManager.exe");
}
success = true;
}
catch (Exception)
{
success = false;
}
return Json(new { Success = success }, JsonRequestBehavior.AllowGet);
}
For some reason, it is attempting to download the file from C:\windows\system32\inetsrv\MyPrintManager.exe? Does anyone know how I can avoid it from pointing to that directory? Do I need to modify my code or my IIS configuration?
My virtual directory for this site is a folder sitting on my C: drive, and the file I actually want to download is in that directory.

No, it's attempting to save the file to C:\windows\system32\inetsrv\MyPrintManager.exe.
That's because C:\windows\system32\inetsrv is the working directory for your process, and you've just given a relative filename.
Specify an absolute filename which says exactly where you want the file to be stored, and it should be fine.

WebClient web = new WebClient();
string url = "http://.../FILENAME.jpg";
web.DownloadFile(new Uri(url), "C:/FILENAME.jpg");

Process.Start is not working after hosting asp.net web application in IIS

I have a return a c# code to save a file in the server folder and to retrieve the saved file from the location. But this code is working fine in local machine. But after hosting the application in IIS, I can save the file in the desired location. But I can't retrieve the file from that location using
Process.Start
What would be the problem? I have searched in google and i came to know it may be due to access rights. But I don't know what would be exact problem and how to solve this? Any one please help me about how to solve this problem?
To Save the file:
string hfBrowsePath = fuplGridDocs.PostedFile.FileName;
if (hfBrowsePath != string.Empty)
{
string destfile = string.Empty;
string FilePath = ConfigurationManager.AppSettings.Get("SharedPath") + ConfigurationManager.AppSettings.Get("PODocPath") + PONumber + "\\\\";
if (!Directory.Exists(FilePath.Substring(0, FilePath.LastIndexOf("\\") - 1)))
Directory.CreateDirectory(FilePath.Substring(0, FilePath.LastIndexOf("\\") - 1));
FileInfo FP = new FileInfo(hfBrowsePath);
if (hfFileNameAutoGen.Value != string.Empty)
{
string[] folderfiles = Directory.GetFiles(FilePath);
foreach (string fi in folderfiles)
File.Delete(fi);
//File.Delete(FilePath + hfFileNameAutoGen.Value);
}
hfFileNameAutoGen.Value = PONumber + FP.Extension;
destfile = FilePath + hfFileNameAutoGen.Value;
//File.Copy(hfBrowsePath, destfile, true);
fuplGridDocs.PostedFile.SaveAs(destfile);
}
To retrieve the file:
String filename = lnkFileName.Text;
string FilePath = ConfigurationManager.AppSettings.Get("SharedPath") + ConfigurationManager.AppSettings.Get("PODocPath") + PONumber + "\\";
FileInfo fileToDownload = new FileInfo(FilePath + "\\" + filename);
if (fileToDownload.Exists)
Process.Start(fileToDownload.FullName);

It looks like folder security issue. The folder in which you are storing the files, Users group must have Modify access. Basically there is user(not sure but it is IIS_WPG) under which IIS Process run, that user belongs to Users group, this user must have Modify access on the folder where you are doing read writes.
Suggestions
Use Path.Combine to create folder or file path.
You can use String.Format to create strings.
Create local variables if you have same expression repeating itself like FilePath.Substring(0, FilePath.LastIndexOf("\\") - 1)
Hope this works for you.

You may have to give permissions to the application pool that you are running. see this link http://learn.iis.net/page.aspx/624/application-pool-identities/
You can also use one of the built-in account's "LocalSystem" as application pool identity but it has some security issue's.

C# Path Problem

I have this file: C:\Documents and Settings\extryasam\My Documents\Visual Studio 2010\Projects\FCR\WebApplication4\config\roles.txt and I want to import it into my C# application. If I insert the full path it's ok, but I want to do something similar to what we do with websites, and that is "\config\roles.txt"
However with the below code, this is not working.
This is my code:
public string authenticate()
{
WindowsIdentity curIdentity = WindowsIdentity.GetCurrent();
WindowsPrincipal myPrincipal = new WindowsPrincipal(curIdentity);
//String role = "NT\\Internet Users";
//string filePath = Server.MapPath("config/roles.txt");
//string filePath = (#"~/WebApplication4/config/roles.txt");
//string filePath = Path.GetDirectoryName(#"\config\roles.txt");
string filePath = Path.GetPathRoot(#"/config/roles.txt");
string line;
string role = "";
if (File.Exists(filePath))
{
StreamReader file = null;
try
{
file = new StreamReader(filePath);
while ((line = file.ReadLine()) != null)
{
role = line;
}
}
finally
{
if (file != null)
{
file.Close();
}
}
}
if (!myPrincipal.IsInRole(#role))
{
return "401.aspx";
}
else
{
return "#";
}
}

In ASP.NET, you can use ~/config/roles.txt - in combination with Server.MapPath(), you can get the full path.
[...] ASP.NET includes the Web application root operator (~), which
you can use when specifying a path in server controls. ASP.NET
resolves the ~ operator to the root of the current application. You
can use the ~ operator in conjunction with folders to specify a path
that is based on the current root.
(see http://msdn.microsoft.com/en-us/library/ms178116.aspx)
So you could try the following:
string filePath = System.Web.HttpContext.Current.Server.MapPath("~/config/roles.txt");

You can use Server.MapPath to map the specified relative or virtual path to the corresponding physical directory on the server.

Since you are working locally you can use absolute path to that file and it's will works.
But what about situation when web application that contains roles.txt file will be deployed on some web server and user will try to access this file from another machine?
You can use the approach below to access file hosted on a web server from a Windows application:
using (var stream = new WebClient().OpenRead("your_web_application_root_url/configs/roles.txt"))
using (var reader = new StreamReader(stream))
{
Console.WriteLine(reader.ReadToEnd());
}
Be warned that share security settings over network is not quite good idea.

You should select your file and press F4, and choose copy to output directory. Then you will be able to work with it

You could try embedding the file as a resource in your project. Something like this: How to embed a text file in a .NET assembly?