I have a C# program which checks if a specific directory exists.
It is simply doing:
Directory.Exists(path).
I tried other ways as well. Using DirectoryInfo and using AlphaFS
On my local machine, the path exists. When I run the same program on a server with the same credentials it doesn't exist.
I wonder if it is a group policy issue. But I am able to go up one level and see it.
\server\volume\share\sub directory - Doesn't exist remotely but on my desktop it does
\server\volume\share - Does exist both on my desktop and remote server
Update
I forgot to mention, that since I had access to my desktop, I got the ACL information.
None of the groups were able to translate.
I really just want to get this application to behave the same way is on the server and find out why it is behaving differently.
Update 2
These are physical servers.
My desktop is Liquid VDI
Below is the code:
var path = txtPath.Text;
using (var user = new Impersonation(fuserdomain, fc_user, fc_pass))
{
var alphaExists = Alphaleonis.Win32.Filesystem.Directory.Exists(path);
var alphaDIExists = new Alphaleonis.Win32.Filesystem.DirectoryInfo(path).Exists;
var SystemExists = System.IO.Directory.Exists(path);
var SystemDIExists = new System.IO.DirectoryInfo(path).Exists;
var AlphaHasFiles = false;
var AlphaDIHasFiles = false;
var SystemHasFiles = false;
var SystemDIHasFiles = false;
try
{
Directory.GetFiles(path);
AlphaHasFiles = true;
}
catch { }
try
{
new DirectoryInfo(path).GetFiles();
AlphaDIHasFiles = true;
}
catch { }
try
{
System.IO.Directory.GetFiles(path);
SystemHasFiles = true;
}
catch { }
try
{
new System.IO.DirectoryInfo(path).GetFiles();
SystemDIHasFiles = true;
}
catch { }
MessageBox.Show(string.Format("alphaExists: {0}\nalphaDIExists: {1}\nSystemExists: {2}\nSystemDIExists: {3}\nAlphaGetFiles: {4}\nAlphaDIGetFiles: {5}\nSystemGetFiles: {6}\nSystemDIGetFiles: {7}\n", alphaExists, alphaDIExists, SystemExists, SystemDIExists, AlphaHasFiles, AlphaDIHasFiles, SystemHasFiles, SystemDIHasFiles));
}
Update 3
Although I have workaround this issue; I am still not sure why I would have a difference between my desktop and server. Is there any tool that can help me see where the issue may be?
I've seen the same thing with File.Exists. I never found an answer and finally threw in the towel, I simply try to use it and catch the exception.
Robust code has to catch it anyway, all the test does is avoid trying if the file or directory is not there. (And the PITA that Visual Studio no longer as any way to ignore an exception on a certain line. No problem runtime, annoying in development.)
This is a complete shot in the dark, since we don't have any specific details to go on. e.g. Is the server you're talking about physically yours, or is it a cloud-based server service?
I'd guess that your machine is an older operating system than the server, and the folder that you're trying to access is one of those special folders that has become more locked down with more recent operating systems (particularly on server operating systems) like the "Program Files" folder. So even though the folder exists on both, the method works on your machine but not on the server, due to permissions.
Hope this helps.
As far as I can tell, the Impersonation class in your code is not part of the dot net framework. Googling finds a couple of implementations. Where does it come from and How confident are you that it actually works in your scenario?
For example, if you remove the Impersonation code, and actually run it as that user, does that make it work?
One other clarification... When you say
\server\volume\share
Do you mean this is a network location (e.g. a UNC location), so is the same network path you are trying to access from both machines? If so, this would open up new possibilities for problems like firewalls, etc... Is that location on either of the two machines that we know about from the question, or a different location?
Related
I have a lot of regularly updating static content that is made available via HTTP through IIS as a Virtual Directory. I have a C# application that updates this static content. The static content represents a matching set.
This content changes regularly and is validated before being made available to clients. I am currently doing a Directory Copy using this code but it is a bit brute force.
The content has a manifest file with version information. I know I can update the manifest file last but I don't want to pull the rug from under clients that are already downloading older content and leave them with a dirty set of files.
What is the recommended way to do a folder replace so that existing clients don't get a mixed up version of the file set? This must be common but I cannot find any libraries or best practice guidance to do this.
I've looked things like rsync for Windows and other backup/restore style tools but they all seem like overkill and generally don't have an API.
I ended up using the Microsoft Sync Framework. It worked out reasonably well. There are still a few bugs. Here's a good intro to the framework.
This is the significant part of my implementation.
public static bool DirectorySynchronisation(string sourceFiles, string targetFiles)
{
Trace.Info("Beginning Directory Sync");
try
{
Trace.Info("... between source location: {0} and targeted location: {1}", sourceFiles, targetFiles);
//Exclude metadata from sync.
var fileSyncScopeFilter = new FileSyncScopeFilter();
fileSyncScopeFilter.FileNameExcludes.Add("metadata.abc");
// Create file system provider
var source = new FileSyncProvider(Guid.NewGuid(), sourceFiles, fileSyncScopeFilter, FileSyncOptions.None);
var target = new FileSyncProvider(Guid.NewGuid(), targetFiles);
// Ask providers to detect changes
source.DetectChanges();
target.DetectChanges();
// Sync changes
SyncOrchestrator agent = new SyncOrchestrator
{
LocalProvider = source,
RemoteProvider = target,
Direction = SyncDirectionOrder.Upload //One way only
};
agent.Synchronize();
Trace.Info("Completed Directory Sync");
return true;
}
catch (Exception exception)
{
Trace.Info("Exception thrown while syncing files");
Trace.Exception(exception);
return false;
}
}
Hope this helps someone.
I was wondering if there is a way to get all the computer names that show up in my network places using C#.
You will want to use the NetServerEnum() API. I dont believe there is a managed wrapper for this in the base .NET libraries but I was able to find this with a quick google search: http://www.codeproject.com/Articles/16113/Retreiving-a-list-of-network-computer-names-using
NOTE: I haven't tested or thoroughly reviewed the codeproject code but it should be enough of a starting point for what you need if there are any issues.
EDIT: Do not use DirectoryServices unless your sure of a domain environment. The System.DirectoryServices class is an ADSI wrapper that dosent work without an Active Directory to query against. NetServerEnum() works on workgroups and domains but dosen't guarantee the most reliable data (not all machines may show up). It relies on the Computer Browser service.
The best solution would probably be a class that wraps both possibilities and merges the results :/
This works, but it takes a while. :/
public List<String> ListNetworkComputers()
{
List<String> _ComputerNames = new List<String>();
String _ComputerSchema = "Computer";
System.DirectoryServices.DirectoryEntry _WinNTDirectoryEntries = new System.DirectoryServices.DirectoryEntry("WinNT:");
foreach (System.DirectoryServices.DirectoryEntry _AvailDomains in _WinNTDirectoryEntries.Children) {
foreach (System.DirectoryServices.DirectoryEntry _PCNameEntry in _AvailDomains.Children) {
if (_PCNameEntry.SchemaClassName.ToLower().Contains(_ComputerSchema.ToLower())) {
_ComputerNames.Add(_PCNameEntry.Name);
}
}
}
return _ComputerNames;
}
Depends on the user's permission, the application may or may not get those information.
Try using ActiveDirectory. This should get you precise information about the local network.
Use System.DirectoryServices.
The action I need help about, is to execute a EXE file on own servers disk from a intranet-webpage, which IIS are on same server-installation. The webpage use a business layer to execute a ProcessStart together with given parameters.
When I perform the execution from web, the taskmanager show me that the application are starting up with the IIS AppPool of webpage as user. Few seconds later it's killed. In my database logs, I can see;
The Microsoft Jet database engine cannot open the file '\\computer\pathfile.ext'. It is already opened exclusively by another user, or you need permission to view its data.
That's correct. The EXE tool are, in turn, loading files from other computers. This is a special behavior which are well studied and well working while using the tool from desktop.
My goal/question,
I want this web-function-call behave with desktop rights. Is it possible at all?
The IIS AppPool have a regular setup with account ApplicationPoolIdentity. I appeared to be "lucky unwise", without knowledge about how much IIS 7.5 and Windows Server 2008 R2 raised the security model since <=IIS6.
I tried to change the app-pool user to NetworkService, Administrator.
I tried to set the application with app-pool as exec/read right
I even tried to let webapp to run a batch-file with a call to application inside..
Then I was begin to change the ProcessStart-behavior. And here, I
don't know much of what to do. I tried to add VERB runas. Force a
password prompt is not a solution here. I tried to simulate a
username/password. No luck there. I also tried to add runas /user:
blabla as parameters with ProcessStart, after used /savecred in a
desktop command window once. No luck there.
Maybe this should work but I just don't understand the correct setup of properties. I add the ProcessStart code snippet below, also added some commented code to let you see what I tried.
public string RunProcess(ApplicationType type, int param)
{
currentSelection = GetApplicationType(type);
ProcessStartInfo info = new ProcessStartInfo(currentSelection.Path);
info.CreateNoWindow = false;
info.UseShellExecute = true;
//info.UseShellExecute = false;
//info.ErrorDialog = false;
//info.UserName = "dummyUsEr";
//info.Password = this.SecurePwd("DummyPWd");
info.WindowStyle = ProcessWindowStyle.Normal;
info.Arguments = string.Format(" {0}", param.ToString());
using (Process exec = Process.Start(info))
{
try
{
exec.WaitForExit();
}
catch
{
}
}
return output;
}
EDIT
Just to be clear, and perhaps help some another guy/girl browsing to this question, I attach the snippet of Password-generation,
protected System.Security.SecureString SecurePwd(string pwd)
{
SecureString securePwd = new SecureString();
foreach (char ch in pwd.ToCharArray())
securePwd.AppendChar(ch);
return securePwd;
}
I see that you've tried putting in a specific username and password for the process start impersonation, but you say that the process accesses files on another computer and I don't see any mention of specifying a domain name which presumably you would need to access remote files?
So like this:
info.Domain = "domainname";
info.UserName = "dummyUsEr";
info.Password = "DummyPWd";
Also, what does this.SecurePwd() do and have you tried it with just the straight password string that you're passing into it?
I was wondering if there is a way to get all the computer names that show up in my network places using C#.
You will want to use the NetServerEnum() API. I dont believe there is a managed wrapper for this in the base .NET libraries but I was able to find this with a quick google search: http://www.codeproject.com/Articles/16113/Retreiving-a-list-of-network-computer-names-using
NOTE: I haven't tested or thoroughly reviewed the codeproject code but it should be enough of a starting point for what you need if there are any issues.
EDIT: Do not use DirectoryServices unless your sure of a domain environment. The System.DirectoryServices class is an ADSI wrapper that dosent work without an Active Directory to query against. NetServerEnum() works on workgroups and domains but dosen't guarantee the most reliable data (not all machines may show up). It relies on the Computer Browser service.
The best solution would probably be a class that wraps both possibilities and merges the results :/
This works, but it takes a while. :/
public List<String> ListNetworkComputers()
{
List<String> _ComputerNames = new List<String>();
String _ComputerSchema = "Computer";
System.DirectoryServices.DirectoryEntry _WinNTDirectoryEntries = new System.DirectoryServices.DirectoryEntry("WinNT:");
foreach (System.DirectoryServices.DirectoryEntry _AvailDomains in _WinNTDirectoryEntries.Children) {
foreach (System.DirectoryServices.DirectoryEntry _PCNameEntry in _AvailDomains.Children) {
if (_PCNameEntry.SchemaClassName.ToLower().Contains(_ComputerSchema.ToLower())) {
_ComputerNames.Add(_PCNameEntry.Name);
}
}
}
return _ComputerNames;
}
Depends on the user's permission, the application may or may not get those information.
Try using ActiveDirectory. This should get you precise information about the local network.
Use System.DirectoryServices.
I am currently developing an application in C# (.NET 4.0) that should have as a part of its functionality the ability to determine the percentage of fragmentation on a particular volume. All the other features have been tested and are working fine but I’ve hit a snag trying to access this data. I would ideally prefer to use WMI as this matches the format I’m using for the other features but at this point I’m willing to use anything that can be efficiently integrated into the application, even if I have to use RegEx to filter the data. I am currently doing the development on a Windows 7 Professional (x64) machine. I have tested the following Powershell snippet using Administrator rights and it works flawlessly.
$drive = Get-WmiObject -Class Win32_Volume -Namespace root\CIMV2 -ComputerName . | Where-Object { $_.DriveLetter -eq 'D:' }
$drive.DefragAnalysis().DefragAnalysis
This is the method I’m using in C# to accomplish the same thing, but the InvokeMethod keeps returning 11 (0xB).
public static Fragmentation GetVolumeFragmentationAnalysis(string drive)
{
//Fragmenation object initialization removed for simplicity
try
{
ConnectionOptions mgmtConnOptions = new ConnectionOptions { EnablePrivileges = true };
ManagementScope scope = new ManagementScope(new ManagementPath(string.Format(#"\\{0}\root\CIMV2", Environment.MachineName)), mgmtConnOptions);
ObjectQuery query = new ObjectQuery(string.Format(#"SELECT * FROM Win32_Volume WHERE Name = '{0}\\'", drive));
scope.Connect();
using (ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, query))
{
object[] outputArgs = new object[2];
foreach (ManagementObject moVolume in searcher.Get())
{
// Execution stops at this line as the result is always 11
UInt32 result = (UInt32)moVolume.InvokeMethod("DefragAnalysis", outputArgs);
if (result == 0)
{
Console.WriteLine("Defrag Needed: = {0}\n", outputArgs[0]);
ManagementBaseObject mboDefragAnalysis = outputArgs[1] as ManagementBaseObject;
if (null != mboDefragAnalysis)
{
Console.WriteLine(mboDefragAnalysis["TotalPercentFragmentation"].ToString());
}
}
else
{
Console.WriteLine("Return Code: = {0}", result);
}
}
}
}
catch (Exception ex)
{
Console.WriteLine("Could not acquire fragmentation data.\n" + ex);
}
return result;
}
I have even added the following line to the app.manifest but still nothing.
<requestedExecutionLevel level="requireAdministrator" uiAccess="false" />
Could somebody please tell me what I’m overlooking? Failure is not an option for me on this, so if it cannot be done using C# I don’t mind creating a DLL in another language (even if I have to learn it), that will give me the results I need. Ideally the application should be able work on any OS from XP upwards and must be totally transparent to the user.
These are the resources I have already used. I wanted to add the jeffrey_wall blog on msdn as well but as a new user I can only add 2 hyperlinks at a time. Thanks again.
http://www.codeproject.com/Messages/2901324/Re-the-result-of-DefragAnalysis-method-in-csharp.aspx
http://social.technet.microsoft.com/Forums/vi-VN/winserverfiles/thread/9d56bfad-dcf5-4258-90cf-4ba9247200da
Try building your application targeting 'Any CPU' - on the Build tab of the project properties. I suspect you're using a target of x86. I get the same error code on my Win7 x64 machine if I do that.
In fact, running your PowerShell snippet in the x86 version of PowerShell gives an empty set of results, too.
You get the same error if you run either piece of code without full Administrator privileges, as you've found, so also ensure your app.manifest is correct. A UAC prompt is a handy hint that it's taking effect!
No idea why this WMI query doesn't like running under WoW64, I'm afraid, but hopefully this will give you a head-start.
You could simply call the PowerShell command you mentioned in your post, since you said the PowerShell code works. From C# you would want to follow this workflow:
Instantiate a PowerShell RunSpace
Open the RunSpace
Add a script to the Commands property
Invoke the command list
Here is an example of how to achieve this, and process the resulting object output.
http://www.codeproject.com/Articles/18229/How-to-run-PowerShell-scripts-from-C
For Windows XP and Windows Vista, you would have to ensure that PowerShell was installed on each of the systems you want to run your program on. Not a bad prerequisite to have, but something to keep in mind as a dependency.
Hope this helps.
The 32-bit WMI provider for Win32_Volume doesn't seem to be able to start the defragsvc for whatever reason. You can force the 64-bit WMI provider even in a 32-bit client running under WOW64 by changing your code to add an additional WMI connection option:
ConnectionOptions mgmtConnOptions = new ConnectionOptions {
EnablePrivileges = true,
Context = new ManagementNamedValueCollection() {
{ "__ProviderArchitecture", 64 }
}
};