I am exporting an excel using c# code and spreadsheetlight dll.
I am trying to insert a picture into excel, everything works well on local machine but on live web site it gives following error
Access to the path 'F:\sitesroot\0\Images\Logo.png' is denied
My c# code.
string filePath = Server.MapPath("~/Images/Logo.png");
SLPicture pic = new SLPicture(filePath); //SLPicture - An inbuilt class for inserting image
Currently what I am doing is manually providing access rights on IIS server but which is not the correct way to go since each time I upload the service I have to redo that again and again
Any expert advice - How I can provide access right through code?
Or How to get rid of this error.
Thanks.
Assuming you are using Cloud services...
You are supposed to use Local Storage for this (http://msdn.microsoft.com/en-us/library/windowsazure/ee758708.aspx).
Basically;
In your Cloud project, go to the properties for the Role and select Local Storage.
Add a new local storage and give it a name, i.e. "foo" and a maximum size. If this is for temporary processing rather than caching, you probably want to tick "Clean on role recycle".
In your code call RoleEnvironment.GetLocalResource("foo") to get the folder name you can use and then do something like Path.Combine("path","Logo.png") to get a file name which you can then write to.
Related
I have a Webapp for different customers-DBs which runs on several Application Servers. The customers are each assigned to an instance on a AS.
For several of the customers, certain data is saved in additional SQLite-DBs on the Application Servers themselves; when this kind of data is added, the WebApp tests whether the according SQLite-DB already exists on this AS and if not, it creates it by using the following code:
dbFileName = "C:\\" + dbFileName;
SQLiteConnection.CreateFile(dbFileName);
using (System.Data.SQLite.SQLiteConnection con = new System.Data.SQLite.SQLiteConnection("data source=" + dbFileName))
{
using (System.Data.SQLite.SQLiteCommand com = new System.Data.SQLite.SQLiteCommand(con))
{
con.Open();
The problem is that if I assign the customer to an instance on another AS, the SQLite-db has to be created again, since it can't access the one on the other AS.
Now my idea was to create the SQLite-dbs on some azure storage, where I could access it from every AS, but so far I'm not able to access it via a SQLite-Connection.
I have knowledge of my specific SAS (=Shared Access Signature) and Connectionstrings like the ones specified on https://www.connectionstrings.com/windows-azure/
but I'm not sure which part I should use for the SQLiteConnection.
Is it even possible?
The only examples on connections to Azurestorage that I found so far are via HttpRequests (like How to access Azure blob using SAS in C#) which doesn't help me or can anybody show me a way to use this for my problem?
Please tell me if you need more information, I'm kind of bad at explaining things and not taking into account that many things aren't common knowledge...
You can not use Azure storage blob as a normal file system. The data source in SQLite connection string should be a file path or memory.
If you want to use Azure storage blob, as far as I know, you can only mount Blob storage as a file system with blobfuse on Linux OS. But this is not 100% compatible with normal file systems.
Another choice is to use Azure storage file, it supports SMB protocol. You can mount a network driver and use it.
I am looking for a way to derive the OneDrive file URL for a file cached to my local OneDrive folder? The only thing I can think of is hardcoding some root URLS for each of the OneDrive folders I have, but this seems nasty!
Does anyone know of any OneDrive client API that lets query a URL based on the local file path?
My use case:
I am trying to attach to and open instance of an Excel workbook. I used to be able to do this Marshal.BindToMoniker(_workbookPath);
However it appears that Excel is now registering the OneDrive URL in the ROT rather than the local file path. This this happened with the update that brought the new auto-save feature to Excel 2016 I think, that seems to be about the time my existing code broke.
There is a similar unanswered question here: C# OneDrive for Business / SharePoint: get server path from locally synced file
Might want to use the following key instead:
HKEY_CURRENT_USER\Software\SyncEngines\Providers\OneDrive
This includes the following registry values:
UrlNamespace: (SharePoint site URL)
MountPoint: (local driver location)
It does appear to include old values which are no longer synced - but it shouldn't be too hard to check against
HKEY_CURRENT_USER\Software\Microsoft\OneDrive\Accounts\Business1\ScopeIdToMountPointPathCache
or
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\SyncRootManager
for paths that are being actively synced.
I am also looking at a solution for getting the SharePoint url to a file in OneDrive Synced File Explorer.
I have noticed you get under C:\Users%username%\AppData\Local\Microsoft\OneDrive\settings\Business1{GUID}.ini a mapping between your OneDrive synced folder and the SharePoint GUID
Example:
libraryScope = 1 630c2a866d9c458b81060eff107887ed+1 5 "GUIDEs" "Documents" 4 "https://mytenant.sharepoint.com/teams/team_10000035" "8d4b558f-7b2e-40ba-ad1f-e04d79e6265a" e0266a43caf347238f684bab486f4e51 e0d25dcb1a014f5f86d787984f6327c2 4f86b3e3e54e42e0bb0f7a58eadf0335 0 "" 0 4cde5c00-3fe3-4162-b831-d8ef440e1593 libraryFolder = 0 1 8bbfe07dfeff41cea7ab5da4a554592a+1 1558084235 "D:\DSUsers\uid41890\TenantName\GUIDEs - General" 2 "General" bd0c1b7c-2a1f-4492-8b1b-8e152c9e0c26
You also have this mapping in the registry Computer\HKEY_CURRENT_USER\Software\Microsoft\OneDrive\Accounts\Business1\ScopeIdToMountPointPathCache
From the GUID you could get the path using SPWeb.GetFile(Guid)
If you can make a standalone function given a local OneDrive file path that returns the SharePoint url, I would greatly appreciate you share your solution here.
I have implemented a solution in AutoHotkey see documentation here
It is based on #GWD idea (see comments below) to generate a temporary excel file with the formula CELL("filename") at each sync locations to extract this mapping information to a text file that is then later parsed to do the reverse mapping from local file to SharePoint url.
I'm using FileUpload.SaveAs() function of C# to upload files to the server but I want to save the files on another partition. Let us say, save the files on Drive D of the server instead on the current drive which is Drive C. Please share your thoughts. Thanks is advance.
I have learned that using full path such as
FileUpload.SaveAs("D:\FileUpload");
will save the file outside the web server.
Check this out.
To simplify the question, how can I upload files on the other partition of the server that hosts my web app?
Based on the documentation from http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.fileupload.saveas.aspx, the String filename is the full path name of the location to save. Meaning you should be able to do so e.g:
FileUpload.SaveAs("D:\where_you_want_to_save")
By the way what have you tried and what error did you get?
Looking at the example on MSDN, it would appear that .SaveAs() accepts a fully qualified file name as a parameter. You could potentially use a Path object to cleanly build a path for the file, or just specify one directly as a string:
uploader.SaveAs("d:\\someFolder\\someFile.ext");
Resolved this by using Virtual Directory of IIS and providing admin credentials for authentication
I am trying to do something like this
Bitmap img = new Bitmap("\\\\server\\folder\\picture.jpg");
which fails every time.
I know I have permission to read the file because I can manually access it.
In general, I would like to know how to work with UNC paths in C#.
That path is valid. Also, with string literals in C# you can declare them like this #".\MyPath\Doesn'tNeed\DoubleSlashes\Because\IUsed#\file.txt"
This tutorial will show you how to access a UNC path with credentials (which you probably need) http://www.codeproject.com/Articles/43091/Connect-to-a-UNC-Path-with-Credentials
Keep in mind that just because the user on Machine A has permissions to access files on Machine B doesn't mean they can do so without entering their credentials.
Account that code runs under on your ASP.Net server does not seem to have permissions to read this file. Some possible reasons:
one-hop authentication (if you run code with impersonation)
anonymous account does not have permissions on "\server"
You need to figure out what account code runs under before taking next steps to grant access to it.
I am trying to using the ESENT windows database with the managedesent library but I always get the error
Error FileAccessDenied (JET_errFileAccessDenied, Cannot access file, the file is locked or in use)
The code to open the database is
m_Dictionary = new PersistentDictionary<string, PropertyStruct>("BaseEstateCachedPropertySummary2");
I am testing this on Windows 7 and the application is an ASP.NET application. Does anyone have any ideas about this, documentation is pretty slim.
Are you trying to open an existing database used by another service (e.g. the Windows Update database)? Esent databases are single-process only so you have to stop any other processes that are using the same database.
I found an answer. Apparently I didn't have write permissions to the default directory where it puts the database so I had to specify the full path such as.
m_Dictionary = new PersistentDictionary<string, PropertyStruct>(#"c:\Data\BaseEstateCachedPropertySummary2");