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• Drop down selection not registered when form submitted quickly?!

  - by Abs

  Hello all, I have noticed a strange thing that happens on my web app when the server is under heavy loads (I am remoting on to the Windows Server). I have a drop down box which is generated dynamically (server side). When I make a selection and quickly press the submit button to indicate my selection the next page does not register my selection but if I do it a bit more slowly it will. I have not come across this before, has anyone? I know its a small issue but there are a lot of "trigger happy", including me... should I put a delay before the form is submitted? If I do, I can only guess the right amount of time. Or is there an underlying problem with my web app? Thanks all

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• Get name of property as a string

  - by Jim C

  I'm trying to improve the maintainability of some code involving reflection. The app has a .NET Remoting interface exposing (among other things) a method called Execute for accessing parts of the app not included in its published remote interface. Here is how the app designates properties (a static one in this example) which are meant to be accessible via Execute: RemoteMgr.ExposeProperty("SomeSecret", typeof(SomeClass), "SomeProperty"); So a remote user could call: string response = remoteObject.Execute("SomeSecret"); and the app would use reflection to find SomeClass.SomeProperty and return its value as a string. Unfortunately, if someone renames SomeProperty and forgets to change the 3rd parm of ExposeProperty(), it breaks this mechanism. I need to the equivalent of: SomeClass.SomeProperty.GetTheNameOfThisPropertyAsAString() to use as the 3rd parm in ExposeProperty so refactoring tools would take care of renames. Is there a way to do this? Thanks in advance.

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• Can I load a 32 bit DLL into a 64 bit process on Windows?

  - by Lee

  I recently upgraded a c# windows service to run as a 64 bit .net process. Normally, this would be trivial, but the system makes use of a 32-bit DLL written in C++. It is not an option to convert this DLL to 64 bit, so I wrapped the DLL in a separate 32 bit .net process and exposed a .net interface via remoting. This is quite a reliable solution, but I would prefer to run the system as a single process. Is there any way I can load my 32 bit DLL into a 64 bit process and access it directly (perhaps through some sort of thunking layer)?

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• TortoiseSVN hangs in Windows Server 2012 Azure VM

  - by ZaijiaN

  Following @shanselman's article on remoting into an Azure VM for development, I spun up my own VS 2013 VM, and that image runs on WS 2012. Once I was able to remote in, I started installing all my dev tools, including Tortoise SVN 1.8.3 64bit. Things went south once I started attempting to check out code from my personal svn server. It would hang and freeze often, although sometimes it would work - I was able to partially check out projects, but I would get frequent connection time out errors. My personal svn server (VisualSVN 2.7.2) runs at home on a windows 7 machine, and I have a dyndns url pointing to it. I have also configured my router to passthrough all 443 traffic to the appropriate port on the server. I self-signed a cert and made sure it was imported into the VM cert store under trusted root authorities. I have no problems connecting to my svn server from 4-5 other computers & locations. From the Azure VM, in both IE and Chrome, I can access the repository web browser with no issues. There are no outbound firewall restrictions. I have installed other SVN add-ons for Visual Studio (AnkhSVN, VisualSVN) and attempted to connect with my svn server, with largely the same results - random and persistent connection issues (hangs/timeouts). I spun up a completely fresh WS 2008 Azure VM, and installed TortoiseSVN, and had the same results. So I'm at a loss as to what the problem is and how to fix it. Web searches on tortoisesvn and windows server issues doesn't yield any current or relevant information. At this point, i'm guessing that maybe some setting or configuration that MS Azure VM images is the culprit - although I should probably attempt to spin up my own local WS VM to rule out that it's a window server issue. Any thoughts? I hope I'm just missing something really obvious!

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• wuinstall doesn't work with winrs

  - by wizard

  I've been having issues with psexec so I've been migrating to use winrs (part of the winrm system). It's a very nice remoting tool which is proving to be more reliable then psexec. Wuinstall is used to install available windows updates. The two however don't play well together. I'm working on a verity of windows servers 2003, 2008 and 2008r2. Wuinstall behaves the same across all hosts and behaves as expected if executed locally by the same user. Command: winrs -r:server wuinstall /download Produces WUInstall.exe Version 1.1 Copyright by hs2n Informationstechnologie GmbH 2009 Visit: http://www.xeox.com, http://www.hs2n.at for new versions Searching for updates ... Criteria: IsInstalled=0 and Type='Software' Result Code: Succeeded 7 Updates found, listing all: Security Update for Windows Server 2008 R2 x64 Edition (KB2544893) Security Update for .NET Framework 3.5.1 on Windows 7 and Windows Server 2008 R2 SP1 for x64-based Systems (KB2518869) Security Update for Microsoft .NET Framework 3.5.1 on Windows 7 and Windows S erver 2008 R2 SP1 for x64-based Systems (KB2539635) Security Update for Microsoft .NET Framework 3.5.1 on Windows 7 and Windows S erver 2008 R2 SP1 for x64-based Systems (KB2572077) Security Update for Windows Server 2008 R2 x64 Edition (KB2588516) Security Update for Windows Server 2008 R2 x64 Edition (KB2620704) Security Update for Windows Server 2008 R2 x64 Edition (KB2617657) Downloading updates ... Error occured: CreateUpdateDownloader failed! Result CODE: 0x80070005 Return code: 1 Googling "0x80070005" finds "unspecified error" which isn't helpful. Thoughts? Is there a better way?

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• Can't access IIS 7 server URL from the same IIS 7 server.

  - by Kevin Raffay

  We have an intranet site ie, xxx.yyyy.com, that users access by entering "http"://xxx.yyy.com. Our problems started when we migrated to IIS 7 running on a new 2003 server. We got rid of our single-sign on code and implemented a security model where we capture a user's domain credentials which we then authenticate against a DB. In order to get the domain credentials passed to our ASP.NET app, we have the following settings: Anonymous Authentication:Disabled ASP.NET Impersonation: Enabled Basic/Digest/Forms Authentication: Disabled Windows Authentication: Enabled We allow "*" and deny "?" in the web.config. Browsing "http"://xxx.yyy.com from any client PC results in a domain login prompt, and if your enter a proper user/pwd, you can get in. However, browsing "http"://xxx.yyy.com while remoting into the server results in 3 domain login prompts and eventually a 401 error - unauthorized. We have traced this behavior to problems with our web site where we have pages doing "screen scraping" using the HttpRequest calling a url on the same server. When doing a HttpRequest from any other client, using a test harness that passes authorized credentials, all is good. So internal HttpRequest calls on the server fail, just like attempts to browse that server's url from within a remote session. Why would a to "http"://xxx.yyy.com on server xxx.yyy.com fail authentication?

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• Issues with ASP.NET via Apache/mod_mono on Ubuntu.

  - by Matthew Scharley

  I run an Ubuntu test server, and my deployment system is also Ubuntu. I've recently been trying to get ASP.NET to work on my test server so that we can take it live. I managed to get it installed, and configured properly, and my application is installed and running, but I can't get anything to work. The error I keep receiving is below, if anyone has any clue what might be going on, it would be greatly appreciated. Server Error in '/' Application Standard output has not been redirected or process has not been started. Description: HTTP 500. Error processing request. Stack Trace: System.InvalidOperationException: Standard output has not been redirected or process has not been started. at System.Diagnostics.Process.CancelErrorRead () [0x00000] at (wrapper remoting-invoke-with-check) System.Diagnostics.Process:CancelErrorRead () at Mono.CSharp.CSharpCodeCompiler.CompileFromFileBatch (System.CodeDom.Compiler.CompilerParameters options, System.String[] fileNames) [0x00000] at Mono.CSharp.CSharpCodeCompiler.CompileAssemblyFromFileBatch (System.CodeDom.Compiler.CompilerParameters options, System.String[] fileNames) [0x00000] at System.CodeDom.Compiler.CodeDomProvider.CompileAssemblyFromFile (System.CodeDom.Compiler.CompilerParameters options, System.String[] fileNames) [0x00000] at System.Web.Compilation.AssemblyBuilder.BuildAssembly (System.Web.VirtualPath virtualPath, System.CodeDom.Compiler.CompilerParameters options) [0x00000] at System.Web.Compilation.AssemblyBuilder.BuildAssembly (System.Web.VirtualPath virtualPath) [0x00000] at System.Web.Compilation.BuildManager.BuildAssembly (System.Web.VirtualPath virtualPath) [0x00000] at System.Web.Compilation.BuildManager.GetCompiledType (System.String virtualPath) [0x00000] at System.Web.HttpApplicationFactory.InitType (System.Web.HttpContext context) [0x00000] Version information: Mono Version: 2.0.50727.42; ASP.NET Version: 2.0.50727.42 Apache version String: Apache/2.2.11 (Ubuntu) mod_mono/2.0 PHP/5.2.6-3ubuntu4.2 with Suhosin-Patch Server at dev Port 80 PS: I had to add three DLL's to the /bin directory in my application, copying them from Windows because I couldn't find them in any of Mono's packages. This might or might not be causing problems, I don't know. The list that I had to add is: System.Web.Abstractions System.Web.Routing System.Web.Mvc

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• One-To-Many Powershell Scripts

  - by Matt

  I'm trying to create a script to run as a scheduled task, which will run against multiple servers and retrieve some information. To start with, I populate the list of servers by querying AD for all servers that match a certain set of criteria, using Get-ADComputer. The problem is, the list is returned as an object, which I can't then pass to the New-PSSession list. I have tried converting it to a comma-seperated string by doing the following: foreach ($server in $serverlist) {$newlist += $server.Name + ","} but this still doesn't work. the alternative is to iterate through the list and run the various commands against each server one at a time, but my preference would be to avoid this and run them using one-to-many remoting. UPDATE: To clarify what I want to end up being able to do is using -ComputerName $serverlist, so I want $serverlist to be a string rather than an object. UPDATE 2: Thanks for all the suggestions. Between them and my original method I'm starting to wonder whether -ComputerName can accept a string variable? I've got varying degrees of success getting the list of computers converted to a comma separated string, but no matter how I do it I always get invalid network address.

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• Why can't I debug my ASP project through a remote desktop connection?

  - by Anthony Benavente

  I just asked this question in Stack Overflow but I figured this stack exchange forum is a better fit. It's been about a month of trying to figure out this problem and we've still not found a solution. We have about seven virtual machines on a server running Windows XP Professional w/ SP 3 all with Visual Studio Interdev and IIS 5.1 installed. Running the programs all work fine, but we just can't debug through remote desktop. When we are logged into the server console (through VM Sphere) and log into one of the virtual machines through there, we are able to debug properly. We figured the issue lies with some kind of permissions for Remote Desktop Users. We've tried nearly every article on the internet (exaggerating of course) and are about to give up hope. One more thing, when we are logged into the virtual machine through the server console and then remote in, the user that was logged into the console is kicked off but debugging works! Does remoting in trick the computer into giving us the correct permissions? I'm really not sure how it works. I know that this technology predates human history, but we are in the process of migrating from ASP Classic to ASP.NET Specs: - Windows XP Professional W/ SP3 - IIS 5.1 - Visual Studio 6 Interdev EDIT: By "debug" I mean running the project with breakpoints. Interdev doesn't stop at breakpoints.

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• Remote Desktop Zooming

  - by codeulike

  Using Remote Desktop from a device with a hi-res screen (say, a Surface Pro) is decidedly tricky - as everything displays 1:1 scale and so looks tiny. If the machine you are remoting into runs Server 2008 R2 or later, you can change the dpi zooming setting (see here). But for older hosts, that doesn't work. Using normal Remote Desktop, you can connect with a lower resolution, say 1280x768, and turn on smart-sizing. However smart-sizing can scale down (to display a huge desktop in a small area) but does not seem to scale up (to display a small desktop in a big area). Using the Windows 8 Remote Desktop App, you can zoom - but you cannot set the default resolution of the host. What I want is a lower resolution in the host, scaled up to fit my screen. So both of those are close to what I want, but dont quite work. So question is: Does the Remote Desktop App allow screen resolution to be set somehow? Is there some other Remote Desktop client that can handle zooming better?

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• Diagnose remote desktop freezes in Windows 7 when no BSOD?

  - by Paul Smith

  Okay, I'm getting no joy from Asus or Microsoft on this, so hoping for some clues on how to narrow down the cause. I have very frequent OS freezes, always & only when running Remote Destkop Client (mstsc) in Windows 7 x64. I never have a bluescreen, and there is never a minidump. The display & input just freezes -- no keyboard, no mouse, and sound will just continue the last wavelength if any. So far, I can't find a way to trap the hang given that there's no bluescreen; advanced startup & recovery settings for system failure are "Write an event" checked, "Automatically restart" checked, and "Kernel memory dump". I've updated to the lasted BIOS, and tried a few different graphics drivers, both generic & ATI. I've also tried disabling Aero, and everything about the remote desktop experience (incrementally unchecked every box in the mstsc - options - experience tab), even disabled/unplugged external monitor to make sure it wasn't a dual-monitor issue. My specs are: Asus G73jh notebook 8GB RAM ATI Mobility Radeon HD 5800 Series graphics (recently tried driver versions 8.791.0.0, 8.801.0.0) American Megatrends G73jh.211 BIOS (7/27/2010) Windows 7 Home Premium x64 Windows Memory Diagnostic passed all of the following at least 3 times with no errors: MATS+ INVC LRAND Stride6 WMATS+ WINVC This notebook is better than most at removing heat (laudable vent design), so I'm not inclined to suspect thermal causes (especially since running 1080p video for hours has never caused a freeze, but mstsc does, reliably, within 5 minutes to an hour). This did seem to start happening after a Windows Update, but I've since reverted every patch applied since a week before the first occurrence, with no joy. (And I'd only had the PC for a couple weeks before that, so it could have been chance + less actual time spent remoting at the beginning.) I'm at my wits end, and I bought this laptop primarily as a remote terminal client (go figure, right?) Any ideas on how to identify the cause of this? Thanks!

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• Remote Desktop connection to vista vs. xp

  - by CMP

  I am trying to log into my work computer remotely. I am using Windows 7 on my laptop. I have created a vpn connection to the network, and I am doing a remote desktop connection directly to the ip of my box (192.168.xxx.yyy). If I do a remote connection to a different box, running xp, it goes into remote desktop mode immediately and I see the windows login dialog as I am used to seeing. If I try remoting to my box, which is running vista, I do not see the remote desktop mode, but an additional dialog on my local machine asking for my credentials. It defaults in my local username. It allows me to log in as a different user, but the domain it has is still my local domain, not my work domain, so none of my usernames or passwords work. There doesn't appear to be a way to change the domain. Trying to hit several more boxes, it appears to act differently on xp and vista target machines. I feel like this must be a configuration issue, but I am not sure what the problem is. Any idea on how I can connect?

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• Walkthrough: Scheduling jobs using Quartz.net &ndash; Part 1: What is Quartz.Net?

  - by Tarun Arora

  Quartz.NET is a full-featured, open source enterprise job scheduling system written in .NET platform that can be used from smallest apps to large scale enterprise systems. What is the problem that we trying to address? I want to schedule the execution of a task but only when something happens. Let’s call that something a trigger, so... if the trigger is met => execute the task. Sounds simple, why not use windows task scheduler for this? Well, windows task scheduler is great for tasks where the trigger can be easily defined. With windows task scheduler will you be able to schedule a task to run on every working day according to the UK calendar (exclude all weekends & bank holidays) without either writing the logic for day check in the task or a wrapper script calling into the task. The task should just contain the execution logic and should not have anything to do with the schedule for execution; Quartz.net allows you to achieve this and lots more. A quartz.net trigger gives you the flexibility for task invocation based on the following triggers, 1. at a certain time of day (to the millisecond) 2. on certain days of the week 3. on certain days of the month 4. on certain days of the year 5. not on certain days listed within a registered Calendar (such as business holidays) 6. repeated a specific number of times 7. repeated until a specific time/date 8. repeated indefinitely 9. repeated with a delay interval Did 8 – repeat indefinitely just ring a bell? I’ll be covering that in the future post. Using Quartz.net as a windows service You can have Quartz.net run as a standalone instance within its own .NET virtual machine instance via .NET Remoting. Let’s take a look at typical application architecture. In the figure below, I have the application tier set up on Machine 1, database set up on Machine 2 and Quartz.net set up on Machine 3 which is normally the architecture for most (if not all) enterprise applications. Figure 1 -  Typical Application architecture while using Quartz.net as a windows service What other options do I have if I don’t want to use Quartz.net? Quartz.net is just one of the many job scheduling services. Have a look at this comprehensive list of free and paid enterprise job scheduling software along with their feature comparison. http://en.wikipedia.org/wiki/List_of_job_scheduler_software This was first in the series of posts on enterprise scheduling using Quartz.net, in the next post I’ll be covering how to Install Quartz.net as a windows service. Thank you for taking the time out and reading this blog post. If you enjoyed the post, remember to subscribe to http://feeds.feedburner.com/TarunArora. Stay tuned!

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• SSL authentication error: RemoteCertificateChainErrors on ASP.NET on Ubuntu

  - by Frank Krueger

  I am trying to access Gmail's SMTP service from an ASP.NET MVC site running under Mono 2.4.2.3. But I keep getting this error: System.InvalidOperationException: SSL authentication error: RemoteCertificateChainErrors at System.Net.Mail.SmtpClient.m__3 (System.Object sender, System.Security.Cryptography.X509Certificates.X509Certificate certificate, System.Security.Cryptography.X509Certificates.X509Chain chain, SslPolicyErrors sslPolicyErrors) [0x00000] at System.Net.Security.SslStream+c__AnonStorey9.m__9 (System.Security.Cryptography.X509Certificates.X509Certificate cert, System.Int32[] certErrors) [0x00000] at Mono.Security.Protocol.Tls.SslClientStream.OnRemoteCertificateValidation (System.Security.Cryptography.X509Certificates.X509Certificate certificate, System.Int32[] errors) [0x00000] at Mono.Security.Protocol.Tls.SslStreamBase.RaiseRemoteCertificateValidation (System.Security.Cryptography.X509Certificates.X509Certificate certificate, System.Int32[] errors) [0x00000] at Mono.Security.Protocol.Tls.SslClientStream.RaiseServerCertificateValidation (System.Security.Cryptography.X509Certificates.X509Certificate certificate, System.Int32[] certificateErrors) [0x00000] at Mono.Security.Protocol.Tls.Handshake.Client.TlsServerCertificate.validateCertificates (Mono.Security.X509.X509CertificateCollection certificates) [0x00000] at Mono.Security.Protocol.Tls.Handshake.Client.TlsServerCertificate.ProcessAsTls1 () [0x00000] at Mono.Security.Protocol.Tls.Handshake.HandshakeMessage.Process () [0x00000] at (wrapper remoting-invoke-with-check) Mono.Security.Protocol.Tls.Handshake.HandshakeMessage:Process () at Mono.Security.Protocol.Tls.ClientRecordProtocol.ProcessHandshakeMessage (Mono.Security.Protocol.Tls.TlsStream handMsg) [0x00000] at Mono.Security.Protocol.Tls.RecordProtocol.InternalReceiveRecordCallback (IAsyncResult asyncResult) [0x00000] I have installed certificates using: certmgr -ssl -m smtps://smtp.gmail.com:465 with this output: Mono Certificate Manager - version 2.4.2.3 Manage X.509 certificates and CRL from stores. Copyright 2002, 2003 Motus Technologies. Copyright 2004-2008 Novell. BSD licensed. X.509 Certificate v3 Issued from: C=US, O=Equifax, OU=Equifax Secure Certificate Authority Issued to: C=US, O=Google Inc, CN=Google Internet Authority Valid from: 06/08/2009 20:43:27 Valid until: 06/07/2013 19:43:27 *** WARNING: Certificate signature is INVALID *** Import this certificate into the CA store ?yes X.509 Certificate v3 Issued from: C=US, O=Google Inc, CN=Google Internet Authority Issued to: C=US, S=California, L=Mountain View, O=Google Inc, CN=smtp.gmail.com Valid from: 04/22/2010 20:02:45 Valid until: 04/22/2011 20:12:45 Import this certificate into the AddressBook store ?yes 2 certificates added to the stores. In fact, this worked for a month but mysteriously stopped working on May 5. I installed these new certs today, but I am still getting these errors.

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• Finding most efficient transmission size in varying network latency scenarios

  - by rwmnau

  I'm building a .NET remoting client/server that will be transmitting thousands of files, of varying sizes (everything from a few bytes to hundreds of MB), and I'm curious about a general method for finding the appropriate transmission size. As I see it, there's the following tradeoff: Serialize entire file into a transmission object and transmit at once, regardless of size. This would be the fastest, but a failure during tranmission requires that the whole file be re-transmitted. If the file size is larger than something small (like 4KB), break it into 4KB chunks and transmit those, re-assembling on the server. In addition to the complexity of this, it's slower because of continued round-trips and acknowledgements, though a failure of any one piece doesn't waste much time. The ideal transmission method (when taking into account negotiation latency vs. failure rate) is somewhere in between, and I'm wondering about how to find out the best size for that particular client. Do I have some dynamic tuning step in my transmission that looks at the current bytes/second average, and then raises the transmission size until the speed starts to drop (failures overwhelm negotiation cost)? Or is there some other method for determining ideal transmission size? The application will be multi-threaded, so number of threads also factors in to the calculation. I'm not looking for a formula (though I'll take one if you've got it), but just what to consider as I create this process.

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• CallContext and ApplicationHost

  - by p2u

  I tried to create an ApplicationHost. But I had errors like SerializationException and FileNotFoundException. Then I found this blog entry, where it's seem to be a remoting problem. In my little application I use the CallContext, so I tried some approaches. When I empty the CallContext before I create the ApplicationHost, it works: Programm class: namespace ApplicationHostDemo { public class Program { public static void Main(string[] args) { Evil evil = new Evil(); CallContext.SetData(Evil.CALLCONTEXT, evil); CallContext.FreeNamedDataSlot(Evil.CALLCONTEXT); Console.WriteLine("Simple Host-Demo\r\n"); Host host = CreateHost(); CallContext.SetData(Evil.CALLCONTEXT, evil); host.ProcessRequest("Index.aspx"); Console.WriteLine("\r\n\r\nSimple Host-Demo end"); Console.ReadLine(); } public static Host CreateHost() { return (Host)ApplicationHost.CreateApplicationHost(typeof(Host), "/", Directory.GetCurrentDirectory()); } public class Host : MarshalByRefObject { public void ProcessRequest(string page) { SimpleWorkerRequest swr = new SimpleWorkerRequest(page, "", Console.Out); HttpRuntime.ProcessRequest(swr); } } } } Evil class: namespace ApplicationHostDemo { [Serializable] public class Evil : ILogicalThreadAffinative { public const string CALLCONTEXT = "evil"; public string Name { get; set; } } } Do you know or could you explain why it works?

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• JBoss 5.1 binds to host address while run in vserver with -b <guest address>

  - by bart cane

  Hello, while starting JBoss 5.1.0.GA in virtual server machine on Debian (linux-VServer technology) I get the following error: ERROR [org.jboss.kernel.plugins.dependency.AbstractKernelController] (main) Error installing to Start: name=jboss.remoting:protocol=rmi,service=JMXConnectorServer state=Create mode=Manual requiredState=Installed java.io.IOException: Cannot bind to URL [rmi://10.1.2.11:1090/jmxconnector]: javax.naming.NoPermissionException [Root exception is java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: java.rmi.AccessException: Registry.Registry.bind disallowed; origin /AA.BB.CC.DD is non-local host] where AA.BB.CC.DD is host machine name, 10.1.2.11 is vserver guest with JBoss and JBoss is started with -b 10.1.2.11 (I also tried -Djboss.bind.address=10.1.2.11 - the same result). 10.1.2.11 is bound to dummy2 interface on host (serving 10.1.2.1 network). The root exception is strange - why JBoss wants to bind to host address AA.BB.CC.DD? There were no problems with 4.2.3.GA on the same machine, also started with -b 10.1.2.11. It starts correctly when no params present - binds to localhost and everything is ok, but it MUST be bound to 10.1.2.11 to be visible by Apache on another vserver guest, acting as proxy. I thought that it can be fixed by setting net.ipv4.conf.all.promote_secondaries=1 via sysctl (was 0) but it didn't help much. Has anyone had such problem? Regards, bart

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• Best method of achieving bi-directional communication between Apple iPad "clients" and a Windows Ser

  - by user361910

  We are currently starting to build a client-server system which will see 10 or more Apple iPad client devices communicating to a central Windows server over a wireless LAN. We wanted to some existing plumbing (.NET remoting/WCF/web services/etc) that would allow us to implement a reliable, secure solution without having to start at a low level (e.g. sockets) and recreate the wheel. One of the major requirements that complicates this scenario is that unlike a traditional web service, the windows server needs to be able to arbitrarily notify the clients whenever certain events occur -- so it is not a simple request/response scenario like the web. Initially, we were going to use Windows clients, so our plan was to use the full-duplex mode of .NET WCF over HTTP|TCP. But now using the iPad, we don't have any of the WCF infrastructure. So my question is: what is the best way to allow an iPad and a Windows server to (securely) communicate over a LAN, with each device able to initiate communication to the other? Am I stuck writing low-level socket code? Thanks!

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• SerializationException Occurring Only in Release Mode

  - by Calvin Nguyen

  Hi, I am working on an ASP.NET web app using Visual Studio 2008 and a third-party library. Things are fine in my development environment. Things are also good if the web app is deployed in Debug configuration. However, when it is deployed in Release mode, SerializationExceptions appear intermittently, breaking other functionality. In the Windows event log, the following error can be seen: "An unhandled exception occurred and the process was terminated. Application ID: DefaultDomain Process ID: 3972 Exception: System.Runtime.Serialization.SerializationException Message: Unable to find assembly 'MyThirdPartyLibrary, Version=1.234.5.67, Culture=neutral, PublicKeyToken=3d67ed1f87d44c89'. StackTrace: at System.Runtime.Serialization.Formatters.Binary.BinaryAssemblyInfo.GetAssembly( ) at System.Runtime.Serialization.Formatters.Binary.ObjectReader.GetType(BinaryAsse mblyInfo assemblyInfo, String name) at System.Runtime.Serialization.Formatters.Binary.ObjectMap..ctor(String objectName, String[] memberNames, BinaryTypeEnum[] binaryTypeEnumA, Object[] typeInformationA, Int32[] memberAssemIds, ObjectReader objectReader, Int32 objectId, BinaryAssemblyInfo assemblyInfo, SizedArray assemIdToAssemblyTable) at System.Runtime.Serialization.Formatters.Binary.ObjectMap.Create(String name, String[] memberNames, BinaryTypeEnum[] binaryTypeEnumA, Object[] typeInformationA, Int32[] memberAssemIds, ObjectReader objectReader, Int32 objectId, BinaryAssemblyInfo assemblyInfo, SizedArray assemIdToAssemblyTable) at System.Runtime.Serialization.Formatters.Binary._BinaryParser.ReadObjectWithMa pTyped(BinaryObjectWithMapTyped record) at System.Runtime.Serialization.Formatters.Binary._BinaryParser.ReadObjectWithMa pTyped(BinaryHeaderEnum binaryHeaderEnum) at System.Runtime.Serialization.Formatters.Binary.__BinaryParser.Run() at System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize(Header Handler handler, __BinaryParser serParser, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage) at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Str eam serializationStream, HeaderHandler handler, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage) at System.Runtime.Remoting.Channels.CrossAppDomainSerializer.DeserializeObject(Me moryStream stm) at System.AppDomain.Deserialize(Byte[] blob) at System.AppDomain.UnmarshalObject(Byte[] blob) For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp." Using FUSLOGVW.exe (i.e., Assembly Binding Log Viewer), I can see the problem is that IIS attempts to find MyThirdPartyLibrary in directory C:\windows\system32\inetsrv. It refuses to look in the bin folder of the web app, where the DLL is actually located. Does anyone know what the problem is? Thanks, Calvin

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• How to upgrade all dependencies to a specific version

  - by Calm Storm

  Hi, I tried doing a mvn dependency:tree and I get a tree of dependencies. My question is, My project depends on many modules which internally depends on many spring artifacts. There are a few version clashes. I want to upgrade all spring related libraries to say the latest one (2.6.x or above). What is the preferred way to do this? Should I declare all the deps spring-context, spring-support (and 10 other artifacts) in my pom.xml and point them to 2.6.x ? Is there any other better method ? [INFO] +- com.xxxx:yyy-jar:jar:1.0-SNAPSHOT:compile [INFO] | +- com.xxxx:zzz-commons:jar:1.0-SNAPSHOT:compile [INFO] | | +- org.springframework:spring-dao:jar:2.0.7:compile [INFO] | | +- org.springframework:spring-jdbc:jar:2.0.7:compile [INFO] | | +- org.springframework:spring-web:jar:2.0.7:compile [INFO] | | +- org.springframework:spring-support:jar:2.0.7:compile [INFO] | | +- net.sf.ehcache:ehcache:jar:1.2:compile [INFO] | | +- commons-collections:commons-collections:jar:3.2:compile [INFO] | | +- aspectj:aspectjweaver:jar:1.5.3:compile [INFO] | | +- betex-commons:betex-commons:jar:5.5.1-2:compile [INFO] | | \- javax.servlet:servlet-api:jar:2.4:compile [INFO] | +- org.springframework:spring-beans:jar:2.0.7:compile [INFO] | +- org.springframework:spring-jmx:jar:2.0.7:compile [INFO] | +- org.springframework:spring-remoting:jar:2.0.7:compile [INFO] | +- org.apache.cxf:cxf-rt-core:jar:2.0.2-incubator:compile [INFO] | | +- org.apache.cxf:cxf-api:jar:2.0.2-incubator:compile [INFO] | | | +- org.apache.geronimo.specs:geronimo-activation_1.1_spec:jar:1.0-M1:compile [INFO] | | | +- org.codehaus.woodstox:wstx-asl:jar:3.2.1:compile [INFO] | | | +- org.apache.neethi:neethi:jar:2.0.2:compile [INFO] | | | \- org.apache.cxf:cxf-common-schemas:jar:2.0.2-incubator:compile UPDATE : I have removed the extra question about "\-" so my question is now what the subject asks for :)

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• What does the \- mean in the mvn dependency tree output

  - by Calm Storm

  Hi, I tried doing a mvn dependency:tree and I get a tree of dependencies. The output looks like below. I want to know what is the "-" symbol that is shown at times and the "+-" symbol for other dependencies (it doesnt seem to be the scope) My actual question is, My project depends on many modules which internally depends on many spring artifacts. There are a few version clashes. I want to upgrade all spring related libraries to say the latest one (2.6.x or above). What is the preferred way to do this? Should I declare all the deps spring-context, spring-support (and 10 other artifacts) in my pom.xml and point them to 2.6.x ? Is there any other better method ? [INFO] +- com.xxxx:yyy-jar:jar:1.0-SNAPSHOT:compile [INFO] | +- com.xxxx:zzz-commons:jar:1.0-SNAPSHOT:compile [INFO] | | +- org.springframework:spring-dao:jar:2.0.7:compile [INFO] | | +- org.springframework:spring-jdbc:jar:2.0.7:compile [INFO] | | +- org.springframework:spring-web:jar:2.0.7:compile [INFO] | | +- org.springframework:spring-support:jar:2.0.7:compile [INFO] | | +- net.sf.ehcache:ehcache:jar:1.2:compile [INFO] | | +- commons-collections:commons-collections:jar:3.2:compile [INFO] | | +- aspectj:aspectjweaver:jar:1.5.3:compile [INFO] | | +- betex-commons:betex-commons:jar:5.5.1-2:compile [INFO] | | \- javax.servlet:servlet-api:jar:2.4:compile [INFO] | +- org.springframework:spring-beans:jar:2.0.7:compile [INFO] | +- org.springframework:spring-jmx:jar:2.0.7:compile [INFO] | +- org.springframework:spring-remoting:jar:2.0.7:compile [INFO] | +- org.apache.cxf:cxf-rt-core:jar:2.0.2-incubator:compile [INFO] | | +- org.apache.cxf:cxf-api:jar:2.0.2-incubator:compile [INFO] | | | +- org.apache.geronimo.specs:geronimo-activation_1.1_spec:jar:1.0-M1:compile [INFO] | | | +- org.codehaus.woodstox:wstx-asl:jar:3.2.1:compile [INFO] | | | +- org.apache.neethi:neethi:jar:2.0.2:compile [INFO] | | | \- org.apache.cxf:cxf-common-schemas:jar:2.0.2-incubator:compile

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• Pitfalls and practical Use-Cases: Toplink, Hibernate, Eclipse Link, Ibatis ...

  - by Martin K.

  I worked a lot with Hibernate as my JPA implementation. In most cases it works fine! But I have also seen a lot of pitfalls: Remoting with persisted Objects is difficult, because Hibernate replaces the Java collections with its own collection implementation. So the every client must have the Hibernate .jar libraries. You have to take care on LazyLoading exceptions etc. One way to get around this problem is the use of webservices. Dirty checking is done against the Database without any lock. "Delayed SQL", causes that the data access isn't ACID compliant. (Lost data...) Implict Updates So we don't know if an object is modified or not (commit causes updates). Are there similar issues with Toplink, Eclipse Link and Ibatis? When should I use them? Have they a similar performance? Are there reasons to choose Eclipse Link/Toplink... over Hibernate?

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• ASP.NET 2.0 and COM Port Communication

  - by theaviator

  ASP.NET 2.0 and COM Port Communication Hello Guys, I have a managed DLL which communicates with the devices attached on COM/Serial ports. The desktop Winforms application sends requests on ports and receives/stores data in memory. In Winforms app I have added a reference to DLL and I am using the methods. This works well. Now, there is a situation where I need to show this data from serial/com port on a web-page. And also users should be able to send requests to the ports using this DLL. I have made a web app in ASP.NET (2.0). Added a reference to the DLL. I am able to use this DLL, the DLL communicates on the COM upon button click on web-page and also the response is shown on web page. However I am not happy with the approach and strongly feel that this is a bad approach. Also the development server crashes after 3 -4 requests. What is the best approach in this scenario. If I use a windows service then how would my ASP.net app will communicate with the Weindows service. Or can this be easily done using WCF. I have not used WCF any time nor any of .net remoting technique. Please suggest me the best architecture in this scenario. Thank you

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• Webstart omits cookie, resulting in EOFException in ObjectInputStream when accessing Servlets?!

  - by Houtman

  Hi, My app. is started from both the commandline and by using an JNLP file. Im running java version 1.6.0_14 First i had the problem that i created the Buffered input and output streams in incorrect order. Found the solution here at StackOverflow . So starting from the commandline works fine now. But when starting the app using Webstart, it ends here java.io.EOFException at java.io.ObjectInputStream$PeekInputStream.readFully(Unknown Source) at java.io.ObjectInputStream$BlockDataInputStream.readShort(Unknown Source) at java.io.ObjectInputStream.readStreamHeader(Unknown Source) at java.io.ObjectInputStream.<init>(Unknown Source) at <..>remoting.thinclient.RemoteSocketChannel.<init>(RemoteSocketChannel.java:76) I found some posts regarding similar problems; at ibm.com - identifies cookies problem at bugs.sun.com - identifies problem as solved in 6u10(b12)? The first suggests that there is a problem in Webstart with cookies. It doesn't seem to be acknowledged as a proper java bug though.. Still i am a bit lost in the solution provided regarding the cookies.(ibm link) Can anyone expand on the cookie solution? I can't find information on how the cookie is generated in the first place. Many thanks.

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• DotNetOpenAuth occasionally throws a NotImplementedException

  - by Chris Moschini

  I have DotNetOpenAuth running on a background thread making calls to Google authorized with OAuth on a regular basis. About once a day, which is about one in 10,000 calls, I get the following Exception: An unhandled exception occurred and the process was terminated. Application ID: DefaultDomain Process ID: 3316 Exception: System.NotImplementedException Message: The method or operation is not implemented. StackTrace: at DotNetOpenAuth.Messaging.ProtocolException.GetObjectData(SerializationInfo info, StreamingContext context) in c:\Users\andarno\git\dotnetopenid\src\DotNetOpenAuth\Messaging\ProtocolException.cs:line 90 at System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.InitSerialize(Object obj, ISurrogateSelector surrogateSelector, StreamingContext context, SerObjectInfoInit serObjectInfoInit, IFormatterConverter converter, ObjectWriter objectWriter, SerializationBinder binder) at System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.Serialize(Object obj, ISurrogateSelector surrogateSelector, StreamingContext context, SerObjectInfoInit serObjectInfoInit, IFormatterConverter converter, ObjectWriter objectWriter, SerializationBinder binder) at System.Runtime.Serialization.Formatters.Binary.ObjectWriter.Serialize(Object graph, Header[] inHeaders, __BinaryWriter serWriter, Boolean fCheck) at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize(Stream serializationStream, Object graph, Header[] headers, Boolean fCheck) at System.Runtime.Remoting.Channels.CrossAppDomainSerializer.SerializeObject(Object obj, MemoryStream stm) at System.AppDomain.Serialize(Object o) at System.AppDomain.MarshalObject(Object o) If it was thrown and caught once a day I'd be fine, but this is a big one - I'm getting this in the Application Error log on the server, and it's crashing the process entirely - the site goes down and restarts. Has anyone else run into this? Something I'm clearly doing wrong?

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