C# - Convert Application To Run Under Medium Trust Level?
Nov 9, 2010
My web application is composed of several Visual Studio projects. It currently runs fine under high trust level (<trust level = "High" />). When I try to run it under medium trust level, I get this error:
Security Exception
Description: The application attempted to perform an operation not allowed by the security policy. To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
what Medium Trust level is ?And what does it mean :
"More and more ASP.NET hosting providers are enforcing a Medium Trust Policy on their servers.Therefore it is important to make your website work (as much as possible) in environments where medium trust is enforced."
Is it possible to get session cookie name in medium trust level? The code below works in full trust, but throws a security exception in medium trust level.
I am trying to use SqlCacheDependency in my web site.I got in touch with my hosting compnay and they said that they support cache but they set the trust level to medium and what I try to do needs full trust level whihch they cannot provide for me.
can someone show me a way or a code samples that use SqlCacheDependency with medium level trust?
the broker is enabled in the hosting sql server
this code raise the error that the hosting providers said that they cannot support in medium level:
I download a webchart.dll file and used it in my application. Everything went right on my local machine. But issue came when i uploaded the file on the server. I am getting trust level medium issue. The assesmbly doesnot run on medium trust level. How can i run assembly in medium trust level.
i wrote all my code on my computer so i had a high trust level, after ftping my site and database to godaddy.com i realized they have a medium level trust enviroment.... i called the tech support and they said they were sorry but they couldnt change it for me... heres my code. any idea how to get it to work in medium level trust? I am trying to create a new directory where all of a users upload goes. The folder is created dynamically when the upload page loads.
My hosting provider just changed the trust level to medium but I cant figureout where to place the configuration on the web.config file! I have spent hours trying to figureout with no luck. here my web.config file
Web hosting provider has set the .net trust level as Medium. so report viewer & crystal reports are not working. it required full trust.so is it possible to execute the reports in medium trust? and how?
ReportDoc.Load(Server.MapPath("~/Reports/Proposal.rpt")); DataTable dt = cm.DisplayUserInfo("select * from tblProposal_Master where proposal_id='000006'").Tables[0]; ReportDoc.SetDataSource(dt); CRV.ReportSource = ReportDoc; CRV.DataBind();
I'm building an ASP.NET MVC site where I want to use OpenSTV to conduct polls. To run results through OpenSTV, I'd have to run the executable. Is that allowed from a medium-trust ASP.NET application?
I have to host a wcf service in a medium trust environment.I want to know which bindings are supported while hosting WCF services in medium trust. There is a MSDN article
http://msdn.microsoft.com/en-us/library/bb412171.aspx which talks about partial trust. I am not sure is it the same as medium trust.
Get current ASP.NET Trust Level programmatically):
but for C#, and would like to have it for VB.NET. Any chance of someone expert in both VB.NET and C# that can translate this to VB code?
I tried myself and got the following VB.NET code but it generates an error inside my VWD:
Private Function GetCurrentTrustLevel() As AspNetHostingPermissionLevel For Each trustLevel As AspNetHostingPermissionLevel In New _ AspNetHostingPermissionLevel() {AspNetHostingPermissionLevel.Unrestricted, _ AspNetHostingPermissionLevel.High, AspNetHostingPermissionLevel.Medium, _ AspNetHostingPermissionLevel.Low, AspNetHostingPermissionLevel.Minimal} Try New AspNetHostingPermission(trustLevel).Demand() Catch generatedExceptionName As System.Security.SecurityException Continue Try End Try Return trustLevel Next Return AspNetHostingPermissionLevel.None End Function
These parts seems to be wrong:
New AspNetHostingPermission(trustLevel).Demand() and
Continue Try
Obviously, need to be handled by someone fluent in both C# and VB.NET and can spot the errors in VB.NET
I am getting following error message while running ASP.net 2003 application. In login page after providing username and pwd i am getting this error. Error: Server Error " " in Application Description: The application attempted to perform an operation not allowed by the security policy. To grant this application the required permission please contact your system administrator or change the application's trust level in configuraion file. Exception Details:System.Security.SecurityException: Required registry access is not allowed.
Error Description while browsing the website under IIS "The application attempted to perform an operation not allowed by the security policy. To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file." Initially I deleted the virtual directory, created again, set the permission to anonymous, set the browse and execute permissions, no solution. Then after doing many trials, I found out the basic problem reading the error "not allowed by the security policy". In web configuration file if we set the security policy to Fully Trusted, then problem solved and application working fine. or Set the trust level to the main configuration file in he "C:WINDOWSMicrosoft.NETFrameworkv2.0.50727CONFIGweb.config"
We had a UAT and Production version of a .NET web application. UAT was taking around 5 seconds to run a particular operation while Prod was taking 35+ seconds.
This even happened when pointing both web applications at the same database and putting them both on the same machine.
The culprit was finally found to be the following entry, which was in the Prod but not UAT web.config
<trust level="High" originUrl="" />
why this would cause such a significant performance degradation??
I'm writing an ASP.NET MVC site where I need to have a "Tasks" application that runs alongside the website. Such a "Tasks" application would collect data at set intervals and insert it into the database.
Of course, I could write a simple Console Application and use the Windows Task Scheduler to run it, but my site is being hosted by GoDaddy and I only have medium trust permissions.
Are there any methods for implementing such functionality while not violating medium trust permissions?
One method that I'm considering is a method in the site itself that gathers data, waits for a long time, and then gathers data again. Would that interupt users' connection to the site?
Im running an ASP.NET MVC application hosted with Mosso, there are telling me that they cannot enable DTC because they run everything in medium trust.So when executing code that references: TransactionScope I get the following error. The transaction manager has disabled its support for remote/network transactions. (Exception from HRESULT: 0x8004D024)
I am using GhostScript to generate some thumbnails of PDF pages in an ASP.NET application. I have it wrapped in this library called GhostScriptSharp that just uses DllImport to call methods in the GhostScript DLL.It looks like this wont work on a medium trust hosting environment, either because of the fact that it is calling unmanaged code, or that it looks like the library is creating files all over the place (outside my virtual directory). I ran Process Monitor and saw it trying to Read, QueryNameInformationFile, CreateFile and QueryStandardInformationFile in places like:
C:WINDOWSsystem32HalftoneDefault or C:gsgs8.63libHalftoneDefault or C:gsfontHalftoneDefault
Any ideas about whether this is "fixable" to run in medium trust? If I can't use GhostScript, is there another free/open source library that WILL work in Medium trust?
I am trying to get a simple prototype using ASP.NET S#arp-architecture (Sharp architecture) to run on a shared hosting site. This site runs in medium trust, which appears to give problems with this framework. At first I went off on a wild goose chase with the mySQL.data.dll, but the latest version already supports partially trusted callers. The only way I found up until now is this blogpost, which basically describes re-compiling everything from the ground up, starting with the various Castle components. Is this the only way to get this to work, and more importantly, does this actually work?
I have had some good experiences with S#arp-architecture, and since I only have a few days to build this prototype, I figured S#arp-architecture would be a good match. So, my options are to stick with SA, or on the other end of the spectrum to hand-roll an MVC/NH/mySQL application.
I'm following this document in order to run my website in a medium trust environment. My web app uses OleDb, so I need to give it permission in medium trust. I've done everything that is in that article and it's still not working In my web_mediumtrust.config I've added the following security class:
I need to generate PDF reports on a server where full trust apps cannot run.(i cannot use PdfSharp and MigraDoc because of security exceptions when i say
PdfDocumentRenderer renderer = new PdfDocumentRenderer(true, PdfSharp.Pdf.PdfFontEmbedding.Always); renderer.Document = doc; renderer.RenderDocument(); // <<< ex here renderer.PdfDocument.Save(filePath);
Message: Request for the permission of type 'System.Security.Permissions.SecurityPermission, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.so i need to have asp.net c# pdf generator that runs on Medium Trust or Low trust OR be able to pass values from asp.net c# to any php pdf generator.I am trying itextsharp-5.0.5,
Together with Ben (@BuildStarted), we've been building the RazorEngine project, which is designed to allow you compile and parse arbitrary templates outside of ASP.NET MVC. The project has had a couple of releases for a while now, and the feedback has been greatBut, we have encountered an issue: Medium trust.
Because we are using the CSharpCodeProvider to compile the Razor-generated classes (to load into the current AppDomain for execution), we encounter a SecurityException when trying to invoke it, due to the LinkDemand enforced on it. When a normal ASP.NET page is compiled (regardless of trust level), it does so through a BuildProvider which is normally GAC'd, and thus is implicity granted the appropriate permissions to compile. Hence ASP.NET WebForms works as standard in Medium trust.
Our code does not, and we need to target scenarios where our built library won't be deployed to the GAC and is running in Medium trust. So we considered building a BuildProvider specifically for it and defer compilation to the ASP.NET build system, but this seems overly complex and disjointed, and the provider itself requires both a mapping through a file extension, and a virtual path (which may or may not resolve to a physical file - think VirtualPathProvider). It all seems overkill, just to get the project working in Medium trust; not just that, but purely for ASP.NET projects as our engine also works outside of ASP.NETSo my question is this, does anyone know of any techniques or technologies for compiling C# code in a Medium trust environment?
I need to load an xML file from the bin folder in ASP.NET (MVC, not that it would count). I can't get the bin folder path nor load the file otherwise.. I need to feed the following method :
