interop question

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- Previous
  - 1
    - Registering VC# Express Offline?? Hello, I have downloaded the VC# Express online on a computer, and by copying the installation files from the temp directory I installed it on the other one which is offline. The installation was completed and VC# is running. However, it pops up nag-balloons and asking me to register it. Since the computer is cut offline from the web, the registration is impossible. How to get rid of the nag-balloons? -- Best Regards, W. Jordan Tag: interop question Tag: 108729
  - 2
    - IsInRole from ASP.NET failing Hi All, I'm attempting to restrict access to my ASP.NET application using role based security. I'm using .NET v1.1 In code I check IsInRole for a local machine group, and it returns false. The name of the group is properly qualified with machine name in caps, and a forward slash (actually 2 'cause I'm using c# w/o @) and then the name of the group properly cased, yet it fails to find it. I found code on the internet that lets you see what groups IsInRole is checking against, and I do not see this group in there. I have 99 entries. I've tried a variety of tests like adding new groups that the user is a member of, removing group membership for groups the user is a member of, and nothing works. I still have 99 entries, and the groups that I remove the user from being a member of still appear in the list of groups the user is allegedly a member of. I've also tried rebooting the server, resetting IIS, clearing my temporary internet files cache, and nothing seems to make it work. I did check to see that IsInRole would be satisfied by providing a group that shows up in the group membership enumeration, and that does work. Anyone run into anything like this before or have any suggestions for me? Your help is appreciated! Tag: interop question Tag: 108728
  - 3
    - unable to find /aspnet_client/system_web/1_1_4322/webuivalidation. I have a sharepoint server I have an asp.net application it is a virtual directory and is defined in sharepoint as an excluded path. I have validators in datagrid, I run app and I get the message "unable to find script library /aspnet_client/system_web/1_1_4322/webuivalidation.js" run aspnet_regiis -c did that no change tried another fix, copied the aspnet_client folder into virtual directory root still get the error what can i set? -- cindy Tag: interop question Tag: 108727
  - 4
    - Trace.Listeners questions A few questions about the Trace.Listeners. I was looking at the samples on MSDN, and wrote a small sample App. I used a TraceSwitch to determine the which messages I should print, and Added two trace listeners, one for a log file, and the other for the event log. The code works OK. First problem: For the EventLogTraceListener, all event log entries are coming out informational. I want some to have severity of error. Is there any built in facility for this, or does anyone have suggestions on how to get this effect? Second problem: In Java, I'm pretty sure that the equivolent trace facility has some kind of formatter class, so that you can determine exactly what the output should look like. For instance, I seem to remember an XML formatter, for example. Is there anything like this for System.Diagnostics.Trace? Thanks. Tag: interop question Tag: 108723
  - 5
    - How to update the ASPNETDB file (login control) with a GridView (asp.net 2.0) Hello I am beginning to feel sorry that i am using the asp.net 2.0 login controls.. it feels it makes you limited and you do not have much support about it.. I managed to view aspnet_Membership and aspnet_Users into 1 GridView using the SqlDataSource control I can't figure out how to Initialize the built in Update in the GridView so i could update user information from the gridview (including UserName, Password and other stuff i added manually to the database when a user register), or i need to do it manually? I already managed to delete a user with GridView1_RowCommand detecting the button pressed and doing Membership.DeleteUser(row.Cells[3].Text , true); Does anyone can please help me here :\ Tag: interop question Tag: 108722
  - 6
    - deployment of .net 2.0 assembly exposed to COM (interop) Hi, I need to write an application which will then be executed by being called from a COM application. It has been suggested to me that I should use the updater application block, but I wondered about the click once facility in dotnet 2.0. However instead of writing an application, I thought of writing just an assembly which I can expose to the COM application through interop. Now there is just one application to deploy, but it is a COM application. I don't know how the current application is deployed, but is there *any* way I can ease the deployment/maintenance burden of that application by using the click once facility to deploy my assembly, without it being part of a .Net application? Thanks for any input Martin Tag: interop question Tag: 108718
  - 7
    - Custom Commands and IMenuCommandService Hi all, Can we add custom commands to the implementation of IMenuCommandService besides those of StandardCommands enumeration ? Thanks Ramesh Tag: interop question Tag: 108715
  - 8
    - Generic Identity and Integrated Security with SQL I have setup the following lines of code: System.AppDomain.CurrentDomain.SetPrincipalPolicy(Security.Principal.PrincipalPolicy.WindowsPrincipal) mPrincipal = System.Threading.Thread.CurrentPrincipal mUser = mPrincipal.Identity ' Create generic identity. mApplicationIdentity = New Security.Principal.GenericIdentity(controlCenterConfiguration.Employee.Alias) ' Create generic principal. mApplicationPrincipal = New Security.Principal.GenericPrincipal(mApplicationIdentity, rolesArray) 'set the thread to run under this new identity System.Threading.Thread.CurrentPrincipal = mApplicationPrincipal I am able to use code-based security using this with no problem. What is not clear to me is how Integrated Security with SQL is still working. My instinct says it should not work, but it does. I would have thought my WindowsIdentity would have been replaced by my GenericIdentity and the thread would not have my windows authentication information. Will someone explain this to me? Tag: interop question Tag: 108712
  - 9
    - Cache Dependencies in Winforms?? Hello I have a C# application and am caching some data on the client side by using a HashTable. Is there a way I can set Cache dependencies like a time factor by which my cache is updated by making a call to the webservice, as and when the time expires? I believe on the server side this is done using System.Web.Caching where you have a number of dependencies to set. Is there something similar available for the client side? If not does anyone know how it could be done? I'd really appreciate if you could reply A.S.A.P. Thanks, Vinit Tag: interop question Tag: 108710
  - 10
    - SynchronizationContext Hello I am trying to raise events in another thread context. I am using SynchronizationContext object. It works fine as long as i am synchronizing any thread with the MAIN PROCESS. if i try to sync between two independant threads it fails. somehow the SynchronizationContext.Current property is null. Any ideas why? Thanks Tag: interop question Tag: 108707
  - 11
    - Windows Installer 3.1(v2) error When attempting to uninstall Microsoft .NET framework version 1.1, I get these errors: (Application popup, event id 26) Microsoft Visual C++ Runtime Library Runtime Error Program C:\Windows\System32\msiexec.exe This application has requested the runtime to terminate in an unusual way. Please contact the application support team for more information. After a long pause, the second error occurs: The Windows Installer service could not be accessed. This can occur if you are running in safe mode or if the Windows Installer is not correctly installed. I have uninstalled and reinstalled Windows Installer v 3.1 (v2) twice using both methods described in this article: http://support.microsoft.com/default.aspx?scid=kb;EN-US;Q315346 I also tried uninstalling the WI and visiting Windows update where it automatically downloads and installs the installer. None of this has worked. I still get both errors. As I said, this started with trying to uninstall .NET framework1.1. I was following the method to unistall and reinstall, described in this article. (I skipped step 4 that required the Msizap utility included in the windows installer SDK utility) (Did not try the repair method listed here) http://support.microsoft.com/default.aspx?scid=kb;en-us;824643 The reason for uninstalling .NET framework1.1 is that a critical security update (KB886903) will not install. Tried countless times even after sucessfully uninstalling/reinstalling .NET1.1. Have .NET 1.0, 1.1 and 2.0 installed Tag: interop question Tag: 108706
  - 12
    - remoting configuration STA I am trying to create a remote object that instantiates an ActiveX control. Apparently ActiveX controls can only be created in STAThreads. When I make the following call from the client: _myRemoteObject = (IRemoteObject) Activator.GetObject( typeof(MyLib.IRemoteObject), host ); I keep getting the following error: {"Could not instantiate ActiveX control 'd5b7f60a-c223-4556-845d-fe5f59e49f03' because the current thread is not in a single-threaded apartment." } I did some searching on the error and people seem to recommend starting threads as STAThreads. But both my server and client were started as STAThread. Something is happening when I make the GetObject() call. When I step into the constructor for my remote object it says that I am in a MTA thread. Does anyone know what I am doing wrong? Is there something that I can put into my remoting configuration file to specify that the remote object should be created in an STAThread? -Corey ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- Tag: interop question Tag: 108697
  - 13
    - .NET programs memory consumption I noticed that my windows application, very simple test written in C#, keeps and keeps allocating memory. For example, when at the start it has allocated 7500kB, after few minutes, memory allocation is 12000kB. Even if i don't click any buttons or so. And when i start clicking a button, with no event handling, it allocated 40k more memory on every click. Is this normal? Why program needs extra memory after a dummie button click? I'm using .NET 2.0 and Visual C# Express, on WinXP Home with AMD64. Memory figures are taken from task manager. Tag: interop question Tag: 108696
  - 14
    - Free components Hi who can advice me a good web site with free .NET components, it will be great if there will be cources also Thank you. Tag: interop question Tag: 108688
  - 15
    - User controls Hi I am writing (practicing) a small game using user controls and some time my control whould become over another same type or another type user or windows control how can I modify the layout , some thing like Z coordinating in my controls??? Thank you Tag: interop question Tag: 108687
  - 16
    - strong-name - framework 1.1 and framework 2.0 Hi guys, I have an application that is a asp.net and uses some dlls. This dlls are signed with a strong-name key. When I sign a dll using framework 1.1 and a file.snk I get a key XXX. And when I sign dll using framwork 2.0 and the same file.snk I get a key ZZZ. (command to get a key from dll: sn -T file.dll) Why does it happen ? Should I not see the same key ? TIA, wrampazo. Tag: interop question Tag: 108686
  - 17
    - How to find a block in Finalize()? Hello, I'm using .NET Framework 1.1, C#. A couple of days before I've found out that my application leaks memory not releasing objects with destructors. I'm using some third-party components (Spring.NET and Oracle Data Provider .NET (ODP.NET is actually a leak in my case)). I know that it's a good habit to call Dispose() if the object is IDisposable, but in my case I cannot do this, and need to rely on destructor (performance loss was considered). Then I've tried to reproduce the problem in a small test project (with only ODP.NET objects) and failed :(. The leak was away. Now I suspect that Spring.NET/ODP.NET somehow blocks the finalizer thread, so that it never clears the garbage left. Justification: /// <summary> /// Create a new session /// </summary> /// <returns>The new session that can be used by the client.</returns> public ISession CreateSession() { GC.Collect(); GC.WaitForPendingFinalizers(); //Application hangs here GC.Collect(); GC.WaitForPendingFinalizers(); new Message(Message.MessageType.CalledCreateSessionOn0, this.GetType().FullName).LogDebug(); ISession session = (ISession) Application.CreateSession()[typeof(ISession).FullName+".Remote"]; return session; } This method will be called relatively early after the client starts (server and client interact over normal MarshalByRef objects, there is anyway not much interaction there...). It is practically the first client call on the server side. Before the first client starts there will be some Spring.NET initialization done and an OracleConnection opened and closed (to check that the database is available). The problem is that this code hangs on the first call to GC.WaitForPendingFinalizers(). By "hangs" I mean that nothing else will be done in application - no log messages, in Visual Studio I can pause/stop application (shows me a Console.ReadLine(); line - is not relevant). I've been waiting for 15 minutes - no changes. The memory leak was found out by ANTS Profiler and is definitely there. :( I've also installed WinDBG in order to find out where the finalizing thread is blocked, but had not much advance on that field (starting from that I do not know which of threads is finalizing thread). I have source code for Spring.NET, but it is really huge and not quite understandable. I would be happy if I'll find out that the problem is really in Spring. Can anyone help me, please? Do I actually force the garbage collector in a correct manner (Collect/WaitForFinalizers, Collect/WaitForFinalizers)? How can I find out what the finalizing thread is actually doing? Does the observed behaviour (hang on WaitForPendingFinalizers) actually an evidence that there are problems in finalizer? Thank you in advance. Tag: interop question Tag: 108685
  - 18
    - problem with special characters in password We have a case where users who are encouraged to have good passwords with norwegian characters and other special characters cannot login to a ASP.NET 1.0 app. This problem is discussed in the following article from MSKB: http://www.kbalertz.com/kb_835388.aspx Do you know if this problem is fixed in later versions of the framework? I.e. servicepacks, 1.1 or 2.0. Thanks. -- _________________ Rolf @ Questus ans Tag: interop question Tag: 108684
  - 19
    - Exception from dialog not catched on Windows x64 box? Hello. I've installed VS 2003 on my Windows XP x64 box. And catched the problem: if exception is thrown from some window ShowDialog it is not catched by catch followed by ShowDialog. Somewhere in the VisibleChanged dialog form handler exception is thrown. private void Dialog_VisibleChanged(object sender, System.EventArgs e) { if (Visible == false) throw new ApplicationException("test exception from dialog"); } On Windows XP x32 box it is catched after dialog is displayed. try { using (Dialog d = new Dialog()) { d.ShowDialog(); } } catch(Exception ex) { MessageBox.Show(string.Format("exception catched\r\n{0}", ex.Message)); } When code is build on Windows XP x64 exception is not catched :( How it could be possible? Compleete test could be downloaded from <http://spot9969.multiply.com/video/item/1> (11KB, VS 2003) Tag: interop question Tag: 108683
  - 20
    - Detect the encoding of a stream Hi, Is there a way in which I can detect the encoding used while creating a StreamReader? I have a method which receives a StreamReader as a parameter. I want to ensure that when I do a StreamReader.BaseStream.Seek() , I give the appropriate offset so that encoding information/byte order marks are not read in (In case the file uses UTF8 or Unicode encoding). Is there a standard way to do that? Thanks, Roshan Tag: interop question Tag: 108678
  - 21
    - Free tool to compress and pack .NET assemblies (embed DLLs is single EXE ) .NETZ is a free open source tool to compress .NET EXE and DLL files, writen in C#. It can also pack the DLL files with the EXE, creating a single EXE file: http://madebits.com/netz/index.php Tag: interop question Tag: 108676
  - 22
    - CPU load of process started from .Net Process class is low Hello, is here anybody who can tell me why process started with Process class has less CPU time that same process started from command line? Most strange thing is that when I use Process class to start batch file, which starts that process, it works faster. BR Tag: interop question Tag: 108674
  - 23
    - Smart Client Problem Hi, I have developed C# Windows application. I thought of deploying this application in the webserver and access the application like SmartCLient model. I have given IIS permissions. I have written small application which will access the main application using URL. I am gettin the login screen of the main application, entered the user name and password, clicked on teh OK, when i click on OK, it will check the app.config file and will connect to the database and will get the MDI screen to Client PC. Here i am getting the Exception. I am unable to catch this exception also. WHen i write MessageBox.Show, it is not displaying the exception, please help me in this. Thanks in advance Satish Tag: interop question Tag: 108673
  - 24
    - Using TcpClient with Modem Hi everybody, I am still learning how sockets, TcpClient and TcpListener work, in order that both sides to send and receive data, both sides must have a socket or TcpListener and a TcpListener right? Is there a possible way to say just have a client side TcpClient application to send a message to remote server like sending a text file? Do TcpClient requires a Internet connection to connect say to remote server? So, to connect to a VPN network(remote server), I need to establish internet connection like using RAS. Right? How do you programatically create connection using a local USB port with a GPRS modem? Using Sockets or TCPClient will be enough to do that? Please provide me with info on these questions. Is there anybody knows how to do this? Thanks. den2005 -- MCP Year 2005, Philippines Tag: interop question Tag: 108671
  - 25
    - MSN chat integration i dont want to have my own chat application but instead integrate msn chat with my application, are there any API exposed for it??? Tag: interop question Tag: 108668
- Next
  - 1
    - Why Assembly.LoadWithPartialName is obsolete? Hello, Does anybody know why the "Assembly.LoadWithPartialName" is obsolete? It seems that the Load method does not have an equivalent replacement for it. -- Best Regards, W. Jordan Tag: interop question Tag: 108659
  - 2
    - framework for linux???? Hi all, Is there a framework for linux? Is it possible to run a .net application on a linux platform? thank you very much mi... Tag: interop question Tag: 108655
  - 3
    - testing a program is running I'm writing my installer which, of course, is a win32 app (no .NET) I would like to test tthe program is already running (in case of reinstall/upgrade) and prompt the user to stop the application. How do I do that? Basically I would like somthing like Process.GetProcessByName() but with win32 calls. Any idea? Tag: interop question Tag: 108654
  - 4
    - WaitCursor / hourglass in custom printpreview dialog Hi, I have created a simple custom PrintPreviewDialog consisting of a simple standard PrintPreviewControl (.NET 1.1) on a WindowsForm with a few buttons (for printing, zooming, etc.). It is working fine, except for that I cannot figure out how display the waitcursor / hourglass while the preview is preparing to show the document *and then go back to the default cursor when the document is displayed*. Turning on the waitcursor is easy, but what event should I hook into to turn it off?? What happens when I preview a document that is about 50 pages long is that you get the blank form on the screen and then nothing happens for maybe 40 seconds and then you get a "Generating Preview" message and then the document is displayed. It is during the initial 40 seconds that I need an hourglass or something to let the users know that something is happening in the background. Here are some snippets of what I am doing currently: // Constructor: public PreviewDialog(System.Drawing.Printing.PrintDocument printDocument, int zoom) { InitializeComponent(); _printDocument = printDocument; _zoom = zoom; } private void PreviewDialog_Load(object sender, System.EventArgs e) { this.Cursor = Cursors.WaitCursor; Initialize(); //this.Cursor = Cursors.Default; // This gets hit instantly, so you never see an hourglass. } private void Initialize() { uxPrintPreview.Anchor = AnchorStyles.Bottom | AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right; uxPrintPreview.Zoom = zoom; this.WindowState = FormWindowState.Maximized; uxPrintPreview.Document = printDocument1 = printDocument; } // The calling code: using (PreviewDialog form = new PreviewDialog(c1Report1.Document)) { form.ShowDialog(this); } If there was an event like LastPageFinished or DocumentRendered or similar in the PrintPreviewControl, I would be home free, but I cannot find anything like that. Any help on this would be greatly appreciated. Thanks, Lars Tag: interop question Tag: 108648
  - 5
    - Work Flow Hi All, Is there any open source code available for workflow engine in C#, VB .Net framework. Regards - Atul Sureka Tag: interop question Tag: 108647
  - 6
    - How to store objects created with C# in database in .NET Framework I want to store the objects that i create in run time in database. In a way that, for a product a create an object from a class written with C#, define its properties and functions that it has, and want to store it in a database (SQL Server 2K). I want the columns to be created and filled dynamically when an object is inserted in db (Just like in J2EE, which is called i think relational mapping, or something like this). How can I do that? Tag: interop question Tag: 108641
  - 7
    - How to store C# objects in DB I want to store objects that i create programmatically in C#, like in J2EE (which is callad i think relational mapping or sometihng like this). I want to create objects that i use for my enterprise applications and store them in database after execution. And I want the columns and rows related to my objects to be created and filled automatically. How can i do that. Thanks? Tag: interop question Tag: 108640
  - 8
    - executable digital signature how do i add to my executable assembly (created using VB.NET / C#) a digital signature? Tag: interop question Tag: 108638
  - 9
    - .NET Remoting to COM Hello, I have a .NET application where I want to be able to access COM objects on a remote server (theses objects are the base for a web appliation we are running). I've been looking on the net for an easy example, or at the very least some documentation that would make tell me how to do it (if at all possible). So if anyone has any idea on how this could (or coudn't) be done, or any cue on where to look and for what, I would strongly appreciate. Many thank's in advance. Eric Tag: interop question Tag: 108637
  - 10
    - installed 2.0.50727 now I get a sql express error message I now get the following error message after copying an asp.net application to the deployment web server. I don't have SQLExpress or any version of SQL 2005 installed. I found the "LocalSQLServer" connection string in the machine.config, changed that to look at a SQL 2000 database, but the error still comes up. An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Data.SqlClient.SqlException: An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) 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. Stack Trace: [SqlException (0x80131904): An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)] System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +734995 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +188 System.Data.SqlClient.TdsParser.Connect(Boolean& useFailoverPartner, Boolean& failoverDemandDone, String host, String failoverPartner, String protocol, SqlInternalConnectionTds connHandler, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, SqlConnection owningObject, Boolean aliasLookup) +820 System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) +628 System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) +170 System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) +359 System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options) +28 System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject) +424 System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject) +66 System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) +496 System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +82 System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +105 System.Data.SqlClient.SqlConnection.Open() +111 System.Data.Common.DbDataAdapter.FillInternal(DataSet dataset, DataTable[] datatables, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) +121 System.Data.Common.DbDataAdapter.Fill(DataTable[] dataTables, Int32 startRecord, Int32 maxRecords, IDbCommand command, CommandBehavior behavior) +162 System.Data.Common.DbDataAdapter.Fill(DataTable dataTable) +107 TIA, Dave Tag: interop question Tag: 108636
  - 11
    - mscorsvw x64 OS freeze When Idle Hello, I am running XP64 SP 1. I had VS2003 installed. When I tried to install VS2005 professional my machine froze on the framework 2.0 install. I rebooted and tried again. Same thing. I disabled my Antivirus and tried again. Froze on the same spot. I uninstalled VS2003 and framework 1.1, disabled my Antivirus and tried to install framework 2.0 from the MS update website. The system froze. Once rebooted, "Add or Remove Programs" showed that the install was complete. I rebooted, disabled my Antivirus and then tried to install VS 2005. It worked. Unfortunately every time I leave my system idle for 5 to 10 minutes it freezes up again. I opened my task manager and let it idle and every time it freezes mscorsvw.exe is on the top of the CPU order. I did some research and found this article. http://blogs.msdn.com/davidnotario/archive/2005/04/27/412838.aspx I tried the: ngen.exe executequeueditems It ran, reported some errors that I missed durning the scroll by and then locked up. I have tried it again and it locks up each time at: Executing C:\windows\microsoft.net\framework\v2.0.0.0,culture=neutral,publictoken=b77a5c561934eo8911 /nodependencies /nologo Least that the way I read my bad hand writing. Any ideas on how to fix it? Thanks in advance Mark Tag: interop question Tag: 108634
  - 12
    - upgrading to .NET 2.0 woes hello , I'm upgrading c++ files in which the source is available that has a managed wrapper to a non-managed dll. It was .NET 1.1 now I want .NET 2.0 I made some changes and I now get some warnings when compiling. I get no errors. Running this dll from my C# app returns the following exception: {"Strong name validation failed. (Exception from HRESULT: 0x8013141A)"} referring to the data: {System.Collections.ListDictionaryInternal} Now as far as I know .NET 2.0 does not contain "System.Collections.ListDictionaryInternal". I'de like to fix my c++ file to point to the new "System.Collections.Specialized.ListDictionary" but I can't even find where it is trying to do this :( Searching the project for "ListDictionary" did not return anything. Any hints? V. (c++ ultra-noob) Tag: interop question Tag: 108631
  - 13
    - assembly name or one of its dependencies was not found Hey Everyone, I have run into a problem with asp.net I have a web page default.aspx that posts to itself. On post, I call a WebService to validate uername and password. In the catch block of the WebSerive call, I am getting the attached error. I have been researching this error for about two days and have tried adding the ASP.NET and NETWORK SERVICE users to the administrator group with full permissions over C:\WINDOWS and it's children as most of the research I did pointed to that issue. I have also installed the XMLPrecompiler solution to see if there are any issues with serialization, but everything checks out fin there as well. Lastly, I verified that I was running .NET 1.1.X as some research said that may be an issue as well. I would appreicate any help or any suggestions. -MW ERROR TEXT: at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall) at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters) at CUSTOM METHOD DECLARATION System.Web.Services.Protocols.SoapException: Server was unable to process request. --> File or assembly name oaayvpwc.dll, or one of its dependencies, was not found. at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall) at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters) CUSTOM METHOD DECLARATION Server was unable to process request. --> File or assembly name oaayvpwc.dll, or one of its dependencies, was not found. Tag: interop question Tag: 108630
  - 14
    - Refreshing TreeView after Editing a Label Here's the problem. I have a TreeView that is essentially a listing of directories and files. If you right-click on a directory then a context menu comes up and one of the options is "New Folder", when the user clicks that it expands the current node, creates and add's a child node, then calls BeginEdit() on the child node. I have written a custom class that implements IComparer to sort on rules that I have defined. The problem comes in the fact that BeginEdit() appears to be an async call, and as far as I can tell, there's no event that gets fired to let me know when it is done so that I can then call Sort() on the TreeView. There is an 'AfterLabelEdit' event on the TreeView, but it appears that the actual label on the node isn't changed until after that event is finished firing. I've tried manually setting the text of the node in an event handler for that event, but it causes the TreeView to do wierd things (like the node is still editable after I finished editing it, and if this is the second or so folder I've created, the previous one I create is being reassigned the same name as the one I created. If anyone can help me, I'd appreciate it. Code: ================================================ private void contextMenuFolder_Click(object sender, EventArgs e) { TreeNode newFolder = new TreeNode("", FOLDER_CLOSED, FOLDER_OPEN); tvwReports.SelectedNode.Nodes.Add(newFolder); tvwReports.SelectedNode.Expand(); CatalogItem item = new CatalogItem(); item.Type = ItemTypeEnum.Folder; newFolder.Tag = item; newFolder.BeginEdit(); } private void tvwReports_BeforeLabelEdit(object sender, NodeLabelEditEventArgs e) { if (e.Node.Tag != null) { if ((e.Node.Tag as CatalogItem).Type != ItemTypeEnum.Folder) e.CancelEdit = true; else e.CancelEdit = false; } else e.CancelEdit = true; } private void tvwReports_AfterLabelEdit(object sender, NodeLabelEditEventArgs e) { this.Cursor = Cursors.WaitCursor; string fullPath = e.Node.FullPath.Substring(e.Node.FullPath.IndexOf('/')); if ((e.Node.Tag as CatalogItem).Name == null) { if (e.Label == null || e.Label == "") //this is a new folder and no name was given, delete the node e.Node.Remove(); else { //get path as relative to the webservice fullPath += e.Label; //new folder node, need to call webservice to add CatalogItemManagement.CatalogItemManager.AddFolder(fullPath); e.Node.Tag = CatalogItemManagement.CatalogItemManager.GetCatalogItem(fullPath); } } else if ((e.Node.Tag as CatalogItem).Name != e.Label) { if (e.Label == null || e.Label == "") //the label was left blank, set it back to what it was before e.CancelEdit = true; else { //node already existed, but folder name has changed, need to update CatalogItemManagement.CatalogItemManager.MoveCatalogItem(fullPath, fullPath.Replace(e.Node.Text, e.Label)); } } this.Cursor = Cursors.Default; } ================================================ I am using Visual Studio 2005 (with .NET 2.0, of course) Tag: interop question Tag: 108620
  - 15
    - Nullable<int>, implementing GetHashCode, and thread safety The VS2005 documentation for Object.GetHashCode has three notes to implementors: *blockquote* If two objects of the same type represent the same value, the hash function must return the same constant value for either object. For the best performance, a hash function must generate a random distribution for all input. The hash function must return exactly the same value regardless of any changes that are made to the object. */blockquote* So in a reference type that isn't immutable satisfying the third requirement seems to require caching the hash code the first time it's queried for. This seems like a good place for Nullable<int>. However, if there's a competing requirement for the reference type to be thread-safe, the cached hash code needs to be initially assigned in a thread safe manner. To avoid the thread safety problems with double checked locking, there will be a locking cost associated with initially creating and caching the hash code. To minimize the cost, and since the hash code will be int-sized, it'd be nice to take advantage of the System.Threading.Interlocked class's methods. Hmm, but Interlocked.CompareExchange can't handle the following: Nullable<int> alpha = null; int value = 1; Interlocked.CompareExchange(alpha,value,null); Rats. The nullable type would have seemed cleaner, but boxing an int into an object (below) still works. Is this the best way to go? How bad would the overhead of locking a private instance field and using a nullable type be by comparison? Is there something obvious with Nullable<int> that I'm missing that would support this? Should Interlocked get overrides to handle Nullable<T>? Could such overrides avoid the same overhead that locking a private instance field would face? class Triple<T1, T2, T3> { private Object hashCode; private T1 first; private T2 second; private T3 third; //... public override int GetHashCode(){ if (this.hashCode == null){ int firstHash = (!Object.ReferenceEquals(this.first,null)) ? this.first.GetHashCode() : 0; int secondHash = (!Object.ReferenceEquals(this.second,null)) ? this.second.GetHashCode() : 0; int thirdHash = (!Object.ReferenceEquals(this.third,null)) ? this.third.GetHashCode() : 0; Interlocked.CompareExchange(ref this.hashCode, (Object)(firstHash ^ secondHash ^ thirdHash), null); } return (int) this.hashCode; } //... } Tag: interop question Tag: 108617
  - 16
    - Embed windows media player and possibly others in .net app? I have a list of media files to choose from in the app. Right now clicking on it will launch it using System.Diagnostics.Process.Start to launch whatever appropriate application for that particular file. Since I know the extension of the file, can I embed media player in the app instead of having media player popped up and run separately, just like embedding the media player in the web page with certain functionality show? Tag: interop question Tag: 108615
  - 17
    - How to add right click menu Tool: Visual Studio 2005 I have a custom photo library application previously written in VS 6. Basically it has 1) DriveListBox, DirListBox, FileListBox, all listed as Microsof.VisualBasic.Compatibility.xxx 2) PictureBox inside a Panel (for auto showing scroll bars when photo exceeds viewable area). 3) Buttons under FileListBox to Rename, Delete, etc file. I'm thinking there must be something equivalent to Explorer that allows you to single click to rename, right click with a bunch of options (Rename, Delete, Cut, Paste, etc) that I can replace the FileListBox with. If not, then I'd like to make it so that right click on a selected file would prompt a context menu with a few basic options. Thanks. Tag: interop question Tag: 108608
  - 18
    - setting envrionment variable in C# and access it within native C++ We are having difficulties getting environment variable within native DLL written in C++ which is loaded by C# .NET assembly, the env var is set by the .NET assembly. We have an existing C++ application, and want to access it within C#. So we wrote Managed C++ wrapper which access the native C++ DLL. The Managed C++ wrapper is compiled as .NET assembly that C# can access. The native C++ DLL need to have an environment variable set to work properly. So within the C#, we use: [DllImport("Kernel32.dll")] public static extern int SetEnvironmentVariable( string name , string value ); to set the env var. But within the native C++ DLL, it will fail when trying to do "getenv()", with error: Object reference not set to an instance of an object. 1. If we make the C# application as console application and set env var in the console before start the C# application, it works. But we can't make the C# app a console app. 2. If we execute within the C# application a .bat file which prints out the env var, it shows that the env var is set. Looks that the native C++ DLL can't getenv() on the env var set within the C# app. Any solutions for this? Thanks a lot. Tag: interop question Tag: 108605
  - 19
    - programmatic to ftp virtual directories programmatic to ftp virtual directories when i connect to an ftp server and i only have access to a few of the ftp virtual directories, do i just change directory to them after connecting and having credentials authorized? is there some special protocol for changing directories to authorized virtiual directories? Tag: interop question Tag: 108604
  - 20
    - programmatic to ftp virtual directories programmatic to ftp virtual directories when i connect to an ftp server and i only have access to a few of the ftp virtual directories, do i just change directory to them after connecting and having credentials authorized? is there some special protocol for changing directories to authorized virtiual directories? Tag: interop question Tag: 108603
  - 21
    - ASP Windows Service or Console based application Hi all, I am confused as to what kind of application to develop. I have to create an application thats like a "Engine" which continously monitors a DB or whatever. It has to work even if the user logoff as this engine feeds some other application. I tried creating a Windows service that runs continously but the status shows "Starting" and i cant "Stop" or "Pause" and was suggested by one BravesCharm that "Status does not change as the service never notifies the SCM that everything started OK" which makes sense. Is there a way for windows service to start some other application? is yes then how can i stop it from this windows service? Please do give me suggestions on how to achieve this. Thanks, Stephen Tag: interop question Tag: 108601
  - 22
    - Clickonce install from CD Hi, I generated the deployment files into a local directory with specified installation URL. My prolbems: - If there is an internet connection on the client machine, it skips the files on the local hard drive, immediately start downloading from the web. - if there is no internet connection, the setup.exe fails (which is the startup program from a CD), but the application icon installs the software well. I implemented a custom async update. When I call the CheckUpdateAsync method I have got an exception in the Application.ThreadException event, not in the AsyncCompleted event as the MSDN says (in the e.Error)... Why? Thanks. lelez ------------ Here it is the code: try { ApplicationDeployment dep = ApplicationDeployment.CurrentDeployment; dep.CheckForUpdateCompleted += checkHandler; dep.CheckForUpdateAsync(); } catch (System.Net.WebException) { // never runs! System.Windows.Forms.MessageBox.Show("There is no internet connection."); } catch (Exception ex) { xxxx.Common.Util.Logger.LogException(ex); } Here it is the handler: private static void dep_CheckCompleted(object sender, CheckForUpdateCompletedEventArgs e) { if (e.Error is System.Net.WebException) { System.Windows.Forms.MessageBox.Show("There is no internet connection."); return; } ApplicationDeployment dep = ApplicationDeployment.CurrentDeployment; dep.CheckForUpdateCompleted -= checkHandler; try { if (e.UpdateAvailable) { ContinueQuestionEventArgs ce = new ContinueQuestionEventArgs(e.AvailableVersion.ToString()); // Ask the user about continue... if (updateIsAvailable != null) updateIsAvailable(null, ce); if (ce.Continue) { dep.UpdateCompleted += updateHandler; dep.UpdateAsync(); } } } catch(InvalidOperationException ex) { xxxxx.Common.Util.Logger.LogException(ex); } } // dep_CheckCompleted... -- ----------------------------------- http://www.lelez.hu ICQ: 177465172 Tag: interop question Tag: 108600
  - 23
    - Caching architecture question. I am thinking about using Caching application block in my web application, for the performance reasons. My ideal sitiuation would be if i could plug in the application block between my Persistence layer and database, so that objects are created from the cache and cost of CRUd operation can be avoided.... the problem each object is not having a unique key, and caching application block does not provides any typed cache functionality, for example if i store a product object wtih uid 1 and a customer object with uid 1 then it would overwrite the product object, Iam thinking about creating a multiple cache managers according to the type of object, and keep all those cache managers in a super cache... in that case would the scavenger clean up caches inside a cachemanager object ? any comments Tag: interop question Tag: 108595
  - 24
    - Program for my scanner This is a long shot, but here goes... I have an HP scanner that came with some software I don't like at all. I would like to write my own dotnet program. What is required? I suppose I would need some sort of component (HP proprietary) to get started. Would HP make such a component accessible for us? What can I do? Thanks. Tag: interop question Tag: 108593
  - 25
    - GDI leaks? Hello all, I've just found the issue that really scares me. It seems that ListView doesn't release some GDI objects. Here you are steps to reproduce the problem: 1. Run Task Manager 2. View->Select Columns 3. Check "GDI Objects", press OK 4. Run Visual Studio 2k3 5. Create new Window Forms application 6. Put into the form "ListView" and enter 5 items. 7. Run Application 8. Force application to refresh (e.g. move another window above this application) You will see that GDI objects increase really fast. The same situation with Add/Remove items, GDI objects still increas. I've noticed that I can increase it number even till 10k and after that application starts to glitch. It seems that the problem can be solved after: GC.Colelct(); But this is *really* bad solution which significant impacts to the performance of application. Any ideas? Thank you, John Tag: interop question Tag: 108591

I have a C API like that:
==== C-API.h ====
typedef double NSTimeInterval;
NSTimeInterval GetTimeSince1970();
===============

Now I have a code generator parsing the headers and automatically
generating:
==== Generated.cs ====
class Wrapper
{
[DllImport(...)]
public extern static NSTimeInterval GetTimeSince1970();
}

where
[StructLayout(LayoutKind.Sequential)]
struct NSTimeInterval
{
public seconds timeinterval;
}
========

but that doesn't seem to work.
while the C call return correct value, C# test return me stupid random like
value.

what's even weirder I think it used to work well, the only breaking change I
could see is that I'm now using .NET 2.0 final release.

Any tips/thoughts?

--
Regards,
Lloyd Dupont

NovaMind development team
NovaMind Software
Mind Mapping Software
<www.nova-mind.com>

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Re: interop question by Lloyd

Lloyd
Tue Dec 20 01:25:09 CST 2005

in fact my wrapper is in managed C++.
I just redefined NSTimeInterval as it is in the (missing) C header and it
works nicely!

--
Regards,
Lloyd Dupont

NovaMind development team
NovaMind Software
Mind Mapping Software
<www.nova-mind.com>
"Lloyd Dupont" <net.galador@ld> wrote in message
news:%23bEbzoSBGHA.1180@TK2MSFTNGP09.phx.gbl...
>I have a C API like that:
> ==== C-API.h ====
> typedef double NSTimeInterval;
> NSTimeInterval GetTimeSince1970();
> ===============
>
> Now I have a code generator parsing the headers and automatically
> generating:
> ==== Generated.cs ====
> class Wrapper
> {
> [DllImport(...)]
> public extern static NSTimeInterval GetTimeSince1970();
> }
>
> where
> [StructLayout(LayoutKind.Sequential)]
> struct NSTimeInterval
> {
> public seconds timeinterval;
> }
> ========
>
> but that doesn't seem to work.
> while the C call return correct value, C# test return me stupid random
> like value.
>
> what's even weirder I think it used to work well, the only breaking change
> I could see is that I'm now using .NET 2.0 final release.
>
> Any tips/thoughts?
>
> --
> Regards,
> Lloyd Dupont
>
> NovaMind development team
> NovaMind Software
> Mind Mapping Software
> <www.nova-mind.com>
>

Top