Unmanaged ActiveX

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- Previous
  - 1
    - System.Reflection.TargetInvocationException Hi, I have a windows application which uses reflection and factory pattern. The code in the factory class to create an instance of an assembly is: dim assemblyInstance as [Assembly] = [Assembly].LoadFrom(pAssembly) dim typeInstance as Type = assemblyInstance.GetType(pType) Dim obj As Object = Activator.CreateInstance(typeInstance) where pAssembly is the path of the .dll and the pType is the type of the assembly. When running the application, the above code will be invoked twice for two different assemblies. For the first one, it works perfect. But for the second one, the CreateInstance statement throws System.Reflection.TargetInvocationException. The innerException is System.InvalidCastException with message "Specified cast is not valid." What's wrong? Thanks. Tag: Unmanaged ActiveX Tag: 80919
  - 2
    - .NET Framework versions I have following problem on my development machine. I am using SQL Server Reporting services it required .NET version 1.1 . But I would like to run new Express Editions to try out new stuff that required .NET version 2 framework. But if I install v2 Reporting Services fail. Is there some way to make some version main (or default) in my case it should be 1.1. I am just wondering if this will fix this problem. If someone knows work around to this problem please let me know. Thanks Shimon. Tag: Unmanaged ActiveX Tag: 80918
  - 3
    - Datasets? Properties? Values? Hello, I have been working with an application that sends a dataset to other forms that are called from individual DLL's. I have noticed that, a dataset that is passed to another form, when changed, changes the dataset in all of the forms. But, if you send a string to the other forms, that the value is independant on each form.. I.E. Called Form from a DLL: Dim ADataset As New DataSet() Dim FormNumber As String Public Property RefDataset() As DataSet Get Return RefDataset End Get Set(ByVal Value As DataSet) ADataset = Value End Set End Property Public Property WhatForm() As String Get Return WhatForm End Get Set(ByVal Value As String) FormNumber = Value End Set End Property If I change the data inside the 'ADataset' the Main App's and the called form's datasets change together (all of them) which is good and fine for what I need it for. But if I change the FormNumber only the called form's FormNumber Changes and not all of them. Is this normal? Does this have something to do with how datasets are created that makes it work for a Dataset and Not other values? Any suggestions will be greatly appreciated, Thank, Chuck Tag: Unmanaged ActiveX Tag: 80915
  - 4
    - License Compiler will not accept multiple modules According to the documentation: http://msdn.microsoft.com/library/en-us/cptools/html/cpgrflicensecompilerlcexe.asp the License Compiler (lc.exe) should be able to accept multiple modules with the /i option. lc /target:targetPE /complist:filename [/outdir:path] /i:modules [/nologo] [/v] But it does not seem to work! I have tried: /i:control1.dll /i:control2.dll /i:control1.dll,control2.dll /i:control1.dll+control2.dll and several other separators. Does anyone know how to reference multiple modules? If not, is there a way to merge multiple license resources into one resource in the .exe image? /Jens -- Jens Christian Mikkelsen http://www.jcmikkelsen.dk Tag: Unmanaged ActiveX Tag: 80913
  - 5
    - Asynchronous Socket Listener question I am relatively new to socket programming and I have not been able to solve the following issue. Can some please help. I have created an async socket listener and I have followed pretty much the Asynchronous Socket Examples in the MSDN Library, with the exception that I am writing a Windows Service. It works fine, but when I try to stop it through the services window it times out and does not stop the service. I can see the exe in the Task Manager. In my OnStop method I have the following: If m_Listener.Connected = True Then m_Listener.Shutdown(SocketShutdown.Both) End If m_Listener.Close() Now I have run my service in debug mode without making a client connection to it before stopping it as a simple test and run into the same problem. I have a theory on what happening, but I'm not sure and need some help. I think that after executing the following 'Nonsignal state must complete activity before threads proceed m_ManualResetEvent.Reset() 'Begins to accept client connection asynchrounously m_Listener.BeginAccept(New AsyncCallback(AddressOf AcceptCallBack),m_Listener) 'Thread waits untils it recieves a signal by Set method m_ManualResetEvent.WaitOne() It is waiting for the a connection of a client through the AcceptCallBack which will do: 'Signals the main thread to proceed m_ManualResetEvent.Set() and the EndAccept method. My theory is that it hangs because the EndAccept has not been called. Can anyone help me or point me in the right direction please! Tag: Unmanaged ActiveX Tag: 80912
  - 6
    - XML pass around I have an XML document that I am retrieving from a Web Service as a String. I need to load this String into a locally accessible XMLDocument and a custom class that I will Deserialize it into. I know how to do the serialization, but am having trouble getting the string into the XMLReader. Here is what I've been working with: Dim oXML As New XmlDocument Dim sXML As String = [WebMethod Request, returning XML] oXML.LoadXml(sXML) Dim xSer As New XmlSerializer(GetType(MyCustomClass)) Return xSer.Deserialize(???) Now, I obviously need to create the XmlReader for deserailization, but how can I get the contents of the XML document in there? Tag: Unmanaged ActiveX Tag: 80911
  - 7
    - System.net.dns.gethostbyaddress I'm having problems getting the host name of a multi-homed machine. My server has two IP addresses and two corresponding host names SERVER1 = HOST1 <-- IP1 HOST2 <-- IP2 I have an application that returns the host name given the application. If the application is running on a second machine "WORK1" then GetHostByAddress returns the correct host name for each ip address. However if I run the application on SERVER1, both IP1 and IP2 return HOST1 as the hostname. Help?? Thanks in advance... Jerome Lavalley Tag: Unmanaged ActiveX Tag: 80909
  - 8
    - Retaining local file system access while impersonating to access a remote drive Is it possible to retain local file system read, write, delete access while impersonating for access to a remote drive in a different domain? I need to be able to move files from a local computer to a remote computer. do i have to copy them from the local computer to the remote computer then delete them fromt the local computer after undo-ing the impersonation? Or is there a way to retain access to both the local computer and the remote computer by while impersonating the use that has access to the remote computer? The File.Move requires read and write access to both the filesystem of the source and the destination because it deletes the file from the source when it is copied to the destination. My current solution is to impersonate, copy local to target, undo impersonation, delete locals. But i would like to be able to impesonate, move local to target, undo impersonation. Tag: Unmanaged ActiveX Tag: 80906
  - 9
    - .Net Framework 1.1 and 2.0 beta Hi, I recently installed the 2.0 beta along with VB.net express and somehow I can't seem to get my web applications that was developed in version 1.1 to work properly. Is there a way to make my web applications to work without uninstalling one of the version? Thanks, Reas Tag: Unmanaged ActiveX Tag: 80902
  - 10
    - RegistryKey bug with GetValue() Anyone know an easy workaround for this? (Other than using P/Invoke on the base Registry APIs, ie: RegQueryValueEx) If I call GetValue() against a remote machine, and the value is of type REG_EXPAND_SZ, the GetValue() function automatically expands any environment variable it finds (ie: %SystemRoot%) - BUT it replaces them with the value for the variable on the local machine, which in many cases, will be wrong! (ie: C:\WINDOWS vs C:\WINNT). I don't see any way to tell GetValue() to NOT do the environment variable expansion. Michael. Tag: Unmanaged ActiveX Tag: 80896
  - 11
    - Obtain Bitmap of a Graphics object In the Win32 API, if a Device Context contains a bitmap (presumably on which the user is drawing), it is possible using the 'GetCurrentObject' API call and the 'OBJ_BITMAP' ObjectType, to obtain a handle to the underlying bitmap. It is then possible to reference this bitmap in calls to BitBlt, or other associated Bitmap-processing routines. How do I obtain a reference to the Bitmap object associated with a Graphics object in .NET Tag: Unmanaged ActiveX Tag: 80895
  - 12
    - Detect Change in PC Name Is there a way to detect if the computer name has been changed in .NET? Tag: Unmanaged ActiveX Tag: 80892
  - 13
    - lock statement Hi i have an important question about the lock statement. If i have object objA; object objB; and then object refObj = objA; or refObj = objB; if i do lock (refObj) { ... } will it be considered like lock(objA){ ... } or lock(objB){ ... } or it will use regObj to lock (so the next call to lock(objA) or lock(objB) will not block? Tag: Unmanaged ActiveX Tag: 80886
  - 14
    - GetEntryAssembly problem Hello! I have a problem with the Assembly.GetEntryAssembly() method. I get an exception when the method is invoked saying: "Object reference not set to an instance of an object". What could cause this problem? Does it have something to do with the AssemblyInfo file? Thanks Linus Rörstad Tag: Unmanaged ActiveX Tag: 80879
  - 15
    - VB.NET to c# convert Hey all Our company recently started using .net and started in VB.NET. We've since changed to c#, but has some code already written in VB.NET. I'm looking for a converter that will just take vb.net and convert it into farely nice c#. I've found one or two, but they do some strange stuff and was wondering if there is a Microsoft converter or one generally accepted as being good by the community? Tag: Unmanaged ActiveX Tag: 80873
  - 16
    - Timer triggering immediately In VisualStudio 2003 a System.Threading.Timer is created as follows: c# code: TimeSpan sleepTime = ... _timer = new Timer(new TimerCallback(run), null, sleepTime, TimeSpan.Zero); ... private void run(object state) { stopTimer(); ... } private void stopTimer() { if (_timer != null) { _timer.Dispose(); _timer = null; } } In certain cases the timer triggers immediately eventhough the sleepTime is several days from now but less than 2^31 milliseconds Whenever this has happened it seems as if the only way to get the framework to behave normally again is to reboot. Does the Knowledge Base article 814861 regarding an unhandled exception error occuring in the Timer control in Visual Studio .NET 2003 fix this problem, or are the problems not related at all? Thanks Tag: Unmanaged ActiveX Tag: 80871
  - 17
    - how many threads? network programming design .NET Hi I am programming a multi-threaded asyncronous server with .NET But when systems thread count reaches to 1350 system can't respond. Simply my design is creating a Reading Thread after every Accept. And creating a Writing Thread when server sends data. Can you share your experience with me on Network Programming and Multi-Threading. Tag: Unmanaged ActiveX Tag: 80869
  - 18
    - datatable index being corrupted Hello All, I have a rather large cached dataset containing global application data for a relatively heavy travelled website. Its totally disconnected from the database, just acts as an in memory table. My problem is during periods of heavy server load, the index on the datatables appears to get corrupted.The stack trace errors on System.Data.Datatable.GetIndex. I can't duplicate this on my development machine, so I'm not real sure what is going on. I'm guessing since the datatables aren't thread safe, when the server is under load it is more likely that multiple threads will be modifying the datatable concurrently and possibly causing it to corrupt the index somehow. Anyone ever run into this? Should I make the write operations threadsafe? Could it be some other problem? Tag: Unmanaged ActiveX Tag: 80867
  - 19
    - Compiling resources into assembly Hi! My app consists of three parts: 1. Client app 2. A webservice with sourcecodefunctions 3. Local "end-user-compiled library" The user does like this: 1. Download small app from Internet 2. Start application and login to my service 3. Small app downloads source code and compiles an assembly for it to use So far so good. Everything works fine as long as I don't need any extra resources. For example: A Form with any Windows Forms control on it works fine. A form containg icons or an ImageList with icons doesn't work since I have to compile the resource into the assembly. I use the CompileAssemblyFromSourceBatch-function to create my assembly. I read somewhere that .resx-files could be entered in the string [] as a part of the code to compile but it doesn't work. My problem is that I don't have physical resx-files. Only as string from my service and I really dont want to create any files locally on the client computer. I know that I can use resgen to make .resource-files and then add csCompilerParameters.CompilerOptions = "/res:form.resource", but since I don't want to create files it's not an option either. In other words... how do I create my assembly using CompileAssemblyFromSourceBatch including my resx-files!!! Regards Kristian Here's how I do it. Pretty straight forward isn't it? // Create compiler csCodeCompiler = csCodeProvider.CreateCompiler(); // Add references CompilerParameters csCompilerParameters = new CompilerParameters(strLibraries, "ClientDownload.dll", true); // Generate a dll csCompilerParameters.GenerateExecutable = false; // Set tempfilescollection csCompilerParameters.TempFiles = csTempFiles; // Compile library csCompilerResults = csCodeCompiler.CompileAssemblyFromSourceBatch(csCompilerParameters, strCode ); return csCompilerResults; Tag: Unmanaged ActiveX Tag: 80866
  - 20
    - System.IO.File.Move why does System.IO.File.Move("c:\\hmbug.jpg", "c:\\foodoo\\foo.jpg"); throw access denied? im just moving a file in a console app? any ideas? Tag: Unmanaged ActiveX Tag: 80858
  - 21
    - .net supported OS i would like to know what are the dotnet languages are avilable and what are the dotnet languages are going to be released by microsoft or other 3-party members. apart from windows is there any OS version avilable for .net framework. Tag: Unmanaged ActiveX Tag: 80856
  - 22
    - dotnet supported OS and languages i would like to know what are the dotnet languages are avilable and what are the dotnet languages are going to be released by microsoft or other 3-party members. apart from windows is there any OS version avilable for .net framework. Tag: Unmanaged ActiveX Tag: 80854
  - 23
    - Can return GenericPrincipal from Web Services? Hi, Can I return GenericPrincipal from Web Services? The following error displays when I try to return GenericPrincipal from Web Services. System.Security.Principal.GenericPrincipal cannot be serialized because it does not have a default public constructor. Thanks. Tag: Unmanaged ActiveX Tag: 80853
  - 24
    - Netscape problem Hi, I have a problem with Netscape. I am using javascript to pass values and redirecting to the same place. it works fine in IE and not in netscape. please suggest. function popup(WardrobeSet) { document.forms(0).action = "WardrobeSet.aspx?WardrobeSet=" + WardrobeSet; document.forms(0).submit(); } Please Advice, Stephen. Tag: Unmanaged ActiveX Tag: 80846
  - 25
    - Calling base implementation from base class? Is there a way to call a base class implementation of a protected method when Here's the scenario: class MyApp { public static Main() { D obj=new D(); obj.Method1(); } } class B { protected void Method1() { } protected void Method2() { //I want to call B's implementation of Method1 even though I'm running as D's implementation of Method2; //conceptually I want to do: this.base.Method1(); } } class D : B { override protected void Method1() { Method2(); } } Is this doable? TIA </joel> Tag: Unmanaged ActiveX Tag: 80842
- Next
  - 1
    - Parallel Installation of .Net Framework 1.1 and 2.0 possible? Hi, Is it possible to have both Framework Versions installed on a sinlge Machine? I couldn't find any information on this @ the MS site. Thanks in advance, Matthias Tag: Unmanaged ActiveX Tag: 80831
  - 2
    - SaveFileDialog - get the remembered path before displaying. OK. Whenever you display a SaveFileDialog it automatically displays the last folder you were in the last time a save was done. Is there a way you can get that folder before displaying it? I can't see anything. The InitialDirectory and FileName properties are "" when you start out. But then when you display the dialog, it knows the last place. Is there a way to get it before displaying it? Thanks... Tag: Unmanaged ActiveX Tag: 80825
  - 3
    - ImageList.Add () - Could this be a Bug ? Hi! I have an ImageList object with one image added with VS Designer. Then, within my code I'am trying to add some other image to the collection: int i = imageList1.Images.Add (myImage, Color.White) ; this throws OutOfMemoryException! imageList1 contains only one bitmap (32x32 24bit), image with the same size I wish to append, and White is selected as the ImageList.TransparentColor. When I use another variant of Add() method, everything works fine: imageList1.Images.Add (myImage) ; Why does it happen ?.. I did something wrong, or it just a CCL bug ?.. Paul Tag: Unmanaged ActiveX Tag: 80820
  - 4
    - memory usage on terminal server I have a question about memory usage for compiled code of .net application. I think that traditional DLL or EXE code is loaded into memory only once and it's shared between processes and/or sessions. However, i am not sure if this mechanism can be used for .net applications. because from EXE or DLL file is loaded only MSIL code and this is JIT compiled in memory. And my question is if this compiled code is shared between processes too. I tried to find an article about this on MSDN, but i couldn't. so if you know something useful then let me know. I need to know this, because of of deploying .net applications to terminal server. And i would like to know, if it is better to write unmanaged code for terminal server, or for example use ngen.exe to precompile an application. thank you in advance Rasto Novotny Tag: Unmanaged ActiveX Tag: 80812
  - 5
    - Changing a DataTables Schema Is it possible to use a DataAdapter to fill a DataTable, change the DataColumns of that DataTable (and maybe even it's name) and then commit those changes to the database (in my case SQL Server 2000)? Eg: [VB.NET] Dim dc As New SqlCommand("SELECT TOP 0 * FROM SomeTable", SomeSqlConnection) dc.CommandType = CommandType.Text Dim da As New SqlDataAdapter(dc) Dim dt As New DataTable da.FillSchema(dt, SchemaType.Source) dt.TableName = "NewTableName" dt.Columns("SomeColumn").ColumnName = "NewName" dt.Columns("AnotherColumn").DataType = GetType(String) dt.Columns.Add("NewColumn", GetType(Integer)) da.Update(dt) [C#] SqlCommand dc = new SqlCommand("SELECT TOP 0 * FROM SomeTable", SomeSqlConnection); dc.CommandType = CommandType.Text; SqlDataAdapter da = new SqlDataAdapter(dc); DataTable dt = new DataTable(); da.FillSchema(dt, SchemaType.Source); dt.TableName = "NewTableName"; dt.Columns["SomeColumn"].ColumnName = "NewName"; dt.Columns["AnotherColumn"].DataType = Type.GetType("System.String"); dt.Columns.Add("NewColumn", Type.GetType("System.Integer")); da.Update(dt); Tag: Unmanaged ActiveX Tag: 80811
  - 6
    - MailMessage and address book entries Hi, I am using the System.Web.Mail.MailMessage class to generate and send email messages from my asp.net web app. I assumed that this was some simple interface to send mail using SMTP, but in the documentation for the "To" property it says: "Recipients in the semicolon-delimited list can be either email addresses or address book display names" Can someone explain to me what "Address book" means in this context? I can't find any other reference to address books in the framework documentation. Is there some kind of behind-the-scenes integration with outlook or exchange? Andy Tag: Unmanaged ActiveX Tag: 80804
  - 7
    - Invalid http request for .NET control Hi, I have a web page with a reference to a .NET control and I am getting a number of extraneous requests occurred that are related to the control To Digress ======= The html page contains a object tag that references a .NET control. <object id="mycontrol" class="http://server/virtualdirectory/mycontrol.dll#mycontrol"></object> The control is downloaded and displayed on the page. Please note: The control is always successfully displayed. The problem ========= Over ADSL, the request for the page seems to take a long time. When I used Ethereal to pack sniff the http traffic, I discovered that 10 invalid requests had been made to find the control. these range from http://server/mycontrol.dll to http://server/mycontrol/mycontrol.exe to http://server/bin/mycontrol/mycontrol.dll The last request is usually the correct http://server/virtualdirectory/mycontrol.dll Each request takes x seconds and the response is usually over 1500 bytes (file not found response). Hence the delay in downloading the page over ADSL. The Question ========= Has anyone encountered this problem before and is there a way to stop it from happenning Thanks in Advance Mark Tag: Unmanaged ActiveX Tag: 80802
  - 8
    - weird behavior ( browser or C# ) I have a problem with a new C# DHTML chat server I am making. First I'll describe the problem and then ill post the code. When I open 3 new instances of IE and connect the first client to localhost:9999 the first client status bas only displays: "opening page http://localhost:9999" It does not display "1" as expected. But when the 2nd client connects the 1st client displays "2" and the 2nd client displays "opening page......" Only when the 3rd client connects the 2nd client displays "2" in the status bar the first client displays "3" in the status bar and the 3rd client displays "1" in the status bar ( because the server now stoped listening and the program terminated. ) But when I restart the server and reuse the same 3 clients ( without closing them and opening new instances of IE ) the first client after connecting displays "1" in the status bar imediately ( as should be ). when connecting the 2nd client it imediatly displays "1" in the status bar and the 1st client dispays "2" in the status bar and when i connect the 3rd client the first client displays "3", the 2nd "2" and the 3rd "1" in the status bar. Why is this behavior. On Netscape the behaviour is somewhat similar. this is the C# code. // console application using System; using System.Net; using System.Net.Sockets; using System.Threading; using System.Collections; using System.IO; using System.Text; namespace AtomHTTPresponse { class AtomHTTPresponse { private const int MAX_CONNECTIONS = 3; private ArrayList prArrayListHTTPpipes = new ArrayList(); private TcpListener prTcpListener = new TcpListener( IPAddress.Parse( "127.0.0.1" ), 9999 ); static void Main(string[] args) { AtomHTTPresponse lAtomHTTPresponse = new AtomHTTPresponse(); Thread lThreadListener = new Thread( new ThreadStart( lAtomHTTPresponse.ListenerHandler ) ); lThreadListener.Start(); } private void ListenerHandler() { prTcpListener.Start(); for ( int lCntOuter = 0; lCntOuter < MAX_CONNECTIONS; lCntOuter++ ) { //lock ( this ) //{ Thread lThreadListener = new Thread( new ThreadStart( ConnectionHandler ) ); lThreadListener.Start(); //} } } private void ConnectionHandler() { TcpClient lTcpClient = prTcpListener.AcceptTcpClient(); NetworkStream lNetworkStream = lTcpClient.GetStream(); StreamReader lStreamReader = new StreamReader( lNetworkStream ); StreamWriter lStreamWriter = new StreamWriter( lNetworkStream ); HTTPpipe lHTTPpipe = new HTTPpipe( lTcpClient, lNetworkStream, lStreamReader, lStreamWriter ); prArrayListHTTPpipes.Add( lHTTPpipe ); lHTTPpipe.WriteToCLient( "<script language=\"javascript\">window.status = 0</script>" ); for ( int lCntInner = 0; lCntInner < prArrayListHTTPpipes.Count; lCntInner++ ) { ( prArrayListHTTPpipes[ lCntInner ] as HTTPpipe ).WriteToCLient( "<script language=\"javascript\">window.status = parseInt( window.status ) + 1</script>" ); } } } class HTTPpipe { public TcpClient puTcpClient; public NetworkStream puNetworkStream; public StreamReader puStreamReader; public StreamWriter puStreamWriter; public char[] puArrCharRequest = new char[256]; static string cStrResponse = "<script language=\"javascript\">window.status = 0</script>"; static string cStrHTTPheader = "HTTP/1.1 200 OK\r\n" + "Server: Microsoft-IIS/5.0\r\n" + "Date: Wed, 9 jan 2004 19:59:09 GMT\r\n" + "X-Powered-By: ASP.NET\r\n" + "Content-Type: text/html\r\n" + "Set-Cookie: ASPSESSIONIDASQSSARR=CCOBBLCBOLKOECFIANBGOBAI; path=/\r\n" // let it be for now. redundancy will be removed at a later time + "Cache-control: private\r\n\r\n"; public HTTPpipe( TcpClient iTcpClient, NetworkStream iNetworkStream, StreamReader iStreamReader, StreamWriter iStreamWriter ) { puTcpClient = iTcpClient; puNetworkStream = iNetworkStream; puStreamReader = iStreamReader; puStreamWriter = iStreamWriter; puStreamReader.Read( puArrCharRequest, 0, puArrCharRequest.Length ); // do nothing with the request but now we know we dont send a response before the request has been fully received. WriteToCLient( cStrHTTPheader ); WriteToCLient( cStrResponse ); } public void WriteToCLient( string iStrResponse ) { puStreamWriter.Write( iStrResponse ); puStreamWriter.Flush(); } public void Close() { puTcpClient.Close(); } } } Tag: Unmanaged ActiveX Tag: 80799
  - 9
    - How can you highlight or disable a selection in a listbox I need disable or highlight a selection in a listbox to indicate that it has been selected before. I can already determine what values wereselected by storing those values in a stateview. Yet, how can I disable or point out those values were previously selected in a listbox and recorded. Tag: Unmanaged ActiveX Tag: 80793
  - 10
    - Multiple References and Object Instantiation?? I am working on a application that has many custom made dlls. Actually, for this app each dll is a different form. I am able, with no problem to reference and instantiate them to use their public properties and methods with no problem. But, if one dll is trying to access another dll's properties (this does not work very good) the project tries to copy the dll to the directory which already contains the dll and the app will not compile. I have tried different ways to work around this, ie. Create a Class that instantiates all the forms from the dlls and reference the Class from whatever needs them. I can reference them just fine but cannot instantiate anything. Basically I am referencing a reference from a reference. Is there a way to Globally include all the dll's in the project using a config file or something so that once the dll is referenced, it is accessible by everything that is referenced from the Main App and Eachother? I don't believe this is very efficient and would greatly appreciate any suggestions, on better ways to accomplish this. The basic plan is to have all the forms independant of the Main App so that if a single form is changed all that is needed is to updated is the corresponding dll. Thanks, Chuck Tag: Unmanaged ActiveX Tag: 80791
  - 11
    - Runtime Security Policy question I THOUGHT I COULD BLOCK CODE ACCESS SIMPLY BY RESTRICTING ACCESS VIA THE FRAMEWORK CONFIGURATION MANAGER. MY EXPERMENT BELOW HAS CONFUSED ME. I attributed a DLL called "Filer" at the assembly level as follows: [assembly:FileIOPermission(SecurityAction.RequestMinimum,Unrestricted=true)] The Filer.dll contains a class called FileOpener. I compiled "Filer.dll" and referenced it from a Windows Form Project. In Framework Config Tool, I created a Code Group named "Test" as a child of the "All Code" code group at the Machine Level, Imported Filer.dll with a Hash Membership Condition, set Policy Level to Exclusive, and set the Permission Set to the "Nothing" Permission Set. I tested the Permission Level with the "Evaluate Assembly" option and was informed I had no Permissions. AS EXPECTED, I ran the form and got an System.Security.Policy.PolicyException when I instantiated the Filer.FileOpener class. I THEN REMOVED THE FILER.DLL ATTRIBUTE mentioned above ([assembly:FileIOPermission( SecurityAction.RequestMinimum, Unrestricted=true)]) ...from the Filer.dll and recompiled, rereferenced in the Form app, in Framework Config tool, reImported the Test Code Group hash membership condition and left all other Security Policy settings the same. I tested the Permission Level with the "Evaluate Assembly" option and was informed I had no Permissions. AS UNEXPECTED, I ran the form and DID NOT get an System.Security.Policy.PolicyException when I instantiated the "filer.dll" FileOpener class. In fact I got no Exception! I would expect no exception if I had made a mistake in reImporting the Filer.dll in the Framework Config Tool, but I didn't. In fact I reversed the process by reattributing the Filer.dll, recompiling, rereferencing in the Form app, in Framework Config tool, reImported the Test Code Group hash membership condition and left all other Security Policy settings the same. I tested the Permission Level with the "Evaluate Assembly" option and was informed I had no Permissions. AS EXPECTED, I ran the form and got an System.Security.Policy.PolicyException when I instantiated the Filer.FileOpener class. This leads me to believe that FRAMEWORK CONFIGURATION MANAGER Runtime Security Policy settings do not affect components that have not been attributed to request Permissions...and instead Permission Calculation only comes into play when code has been attributed with permission requests. This goes against what I read about the subject. Can you see what I am missing? Tag: Unmanaged ActiveX Tag: 80788
  - 12
    - Problems adding a reference with COM --converting to type .NET assembly failed Hello-- I'm in the process of coverting a VB6 app to VB.NET. My VB6 app is a help desk program, which scans a mailbox that we have set up for our help desk. We use Novell Groupwise and in my VB6 app, I added a reference to the Groupwise type library--no problem. But when I try to add a reference in .NET, the Groupwise library shows up in the COM list and when I go to add it, I get an error message saying: "A reference to GroupWare type library' could not be added. Converting the type library to a .NET assembly failed. Could not load type GroupwareTypeLibrary.DocumentType2Class from assembly Interop.GroupwareTypeLibrary, version 1.0.0.0." The reading I've been doing for the better part of a day suggests that the .dll needs to be registered with the GAC. I tried using regasm.exe but got a message saying it failed to load because it's not a valid .NET assembly. I don't know what I'm supposed to do to be able to get this reference added. Any help would be appreciated. Thanks. Molly J. Fagan Oklahoma Foundation for Medical Quality Tag: Unmanaged ActiveX Tag: 80782
  - 13
    - How to set value of <INPUT type=file...> element programmatically? This is a multi-part message in MIME format. ------=_NextPart_000_0012_01C484AE.304460A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi ALL. I need to simulate send POST data ( - file upload) as it was submitted = in Browser. In C# I create instanse of IE, navigate to page with the = form, fill in the fields and try to Submit by call submitButton.click() = Unfortunately it does not work while file_filed.vale =3D <path_to_file> = has no effect, value <INPUT type=3Dfile...> cound not be set from script = of that HTML page. Is there another way to set that value by means of = .NET ? Below the part of code : SHDocVw.InternetExplorer ie =3D new SHDocVw.InternetExplorerClass(); object o =3D null; ie.Navigate( url, ref o, ref o, ref o, ref o ); // navigate to page with = the form and waiting for DownloadComplete ............................................. mshtml.HTMLDocument doc =3D (mshtml.HTMLDocument)ie.Document; mshtml.IHTMLInputFileElement file =3D = (mshtml.IHTMLInputFileElement)doc.getElementsByName("file").item(null,0);= file.value =3D m_sPathToFile; // has no effect!!!!!!! mshtml.HTMLInputButtonElement btn =3D = (mshtml.HTMLInputButtonElement)doc.getElementsByName("send").item(null,0)= ; btn.click(); ........................ Thank you for any help Evgeny ------=_NextPart_000_0012_01C484AE.304460A0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2800.1106" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY> <DIV><FONT face=3DArial size=3D2>Hi ALL.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I need to simulate send POST data = ( -=20 file upload) as it was submitted in Browser. In C# I create = instanse=20 of IE, navigate to page with the form, fill in the fields and try to = Submit by=20 call submitButton.click() Unfortunately it does not work while = file_filed.vale =3D=20 <path_to_file> has no effect, value <INPUT type=3Dfile...> = cound not=20 be set from script of that HTML page. Is there another way to set that = value by=20 means of  .NET ? Below the part of code :</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV> <P><FONT face=3D"Courier New" size=3D2>SHDocVw.InternetExplorer ie =3D = new=20 SHDocVw.InternetExplorerClass();<BR></FONT><FONT face=3D"Courier New"=20 size=3D2>object o =3D null;<BR></FONT><FONT face=3D"Courier New" = size=3D2>ie.Navigate(=20 url, ref o, ref o, ref o, ref o ); // navigate to page with the form and = waiting=20 for DownloadComplete<BR></FONT><FONT size=3D2></FONT></P> <P><FONT size=3D2><FONT=20 face=3D"Courier = New">.............................................<BR></FONT></P></FONT> <P><FONT face=3D"Courier New" size=3D2>mshtml.HTMLDocument doc =3D=20 (mshtml.HTMLDocument)ie.Document;<BR></FONT><FONT face=3D"Courier New"=20 size=3D2>mshtml.IHTMLInputFileElement file =3D=20 (mshtml.IHTMLInputFileElement)doc.getElementsByName("file").item(null,0);= <BR></FONT><FONT=20 face=3D"Courier New" size=3D2>file.value =3D m_sPathToFile; // has no=20 effect!!!!!!!<BR></FONT><FONT face=3D"Courier New"><FONT=20 size=3D2>mshtml.HTMLInputButtonElement btn =3D=20 (mshtml.HTMLInputButtonElement)doc.getElementsByName("send").item(null,0)= ;<BR></FONT><FONT=20 size=3D2>btn.click();</FONT></FONT></P> <P><FONT face=3D"Courier New" = size=3D2>........................</FONT></P> <P><FONT face=3D"Courier New" size=3D2></FONT> </P> <P><FONT face=3DArial size=3D2>Thank you for any help</FONT></P> <P><FONT face=3DArial size=3D2>Evgeny</FONT></P></DIV></BODY></HTML> ------=_NextPart_000_0012_01C484AE.304460A0-- Tag: Unmanaged ActiveX Tag: 80781
  - 14
    - Additional information: Exception has been thrown by the target of an invocation. Hi, I have .dll with Form and ImageList component, when I'm making instance, I got execption: An unhandled exception of type 'System.Reflection.TargetInvocationException' occurred in mscorlib.dll Additional information: Exception has been thrown by the target of an invocation. at line: this.imglToolBar.ImageStream = ((System.Windows.Forms.ImageListStreamer)(resources.GetObject("imglToolBar.I mageStream"))); What is wrong? thx in andvance pawel Tag: Unmanaged ActiveX Tag: 80777
  - 15
    - Add a DLL to GAC Hi All, I added a DLL written by VB.NET to GAC. This DLL is located at C:\LLSI-Tech\GAC in my local computer. The project(project1) for above DLL is located at C:\clearcase\payoff. I add this DLL to my another VB class project(project2) as an reference from C:\LLSI-Tech\GAC. However, the path for the DLL changes from C:\LLSI- Tech\GAC to C:\clearcase\payoff\bin after I rebuild project2. Does anybody can tell me what is going on. Thank you in advance ! Hi All, I added a DLL written by VB.NET to GAC. This DLL is located at C:\LLSI-Tech\GAC im my local computer. The project(project1) for above DLL is located at C:\clearcase\payoff. I add this DLL to my another VB class project(project2) as a reference from C:\LLSI-Tech\GAC. However, the path for the DLL changes from C:\LLSI- Tech\GAC to C:\clearcase\payoff\bin after I rebuild project2. Does anybody can tell me what is going on. Thank you in advance ! My email address is ningsheng.xu@litton.c-bass.com Nelson Nelson Tag: Unmanaged ActiveX Tag: 80774
  - 16
    - OutOfMemoryException was thrown Hello everyone, I wrote a web service that monitorizes some directories and their contents. It returns a XML document as string. A web application calls this web service and parses the XML to display the status of directories graphically. It worked fine on Windows 2000. Then I transfered the web application on Windows 2003 and an OutOfMemoryException is thrown when there are too many files. Note this number of files excedeed is very low (order of 20). The web service still works on Windows 2003, but the web application causes the faults. The virtual memory settings are the same on 2000 e 2003. Thanks in advance, Gionni Tag: Unmanaged ActiveX Tag: 80767
  - 17
    - Serializing private members of a class I have a private instance of a object in a class i wish to include in the output of class serialization. The object is private because the contents cannot be modified outside the class but it is important that the contents of this private member are retained when the class is serialised. Can anyone tell me how i can include this private object instance into the serialised output. I know there are a number of xmlattributes you can apply to classes and class members, but i can't seem to find one that will allow me to do what i want. Thanks Tag: Unmanaged ActiveX Tag: 80756
  - 18
    - Weird IE behavior Hi all, I am trying to make a very efficient C# DHTML chat server. But even the responding to clients bogles me. I will post the code after I have described the problem: When i open 3 new instances of IE and connect the first client to localhost:9999 all the status bar displays is: "opening page......." It does not display "1" as expected. But when the 2nd client connects the 1st client displays "2" and the 2nd client displays "opening page" Only when the 3rd client connects the 2nd client displays "2" the first client displays "3" and the 3rd client displays "1" ( because the programm now terminated. ) But when I restart the client and reuse the same 3 clients ( without closing them and opening new instances of IE ) the first client after connecting displays "1" imediately ( as should be ). when connecting the 2nd client it imediatly displays "1" and the 1st client dispays "2" and so on and so on. Is IE or C# so fucked up or am I doing something wrong? // console application using System; using System.Net; using System.Net.Sockets; using System.Threading; using System.Collections; using System.IO; using System.Text; namespace AtomHTTPresponse { class AtomHTTPresponse { private const int MAX_CONNECTIONS = 3; private ArrayList prArrayListHTTPpipes = new ArrayList(); private TcpListener prTcpListener = new TcpListener( IPAddress.Parse( "127.0.0.1" ), 9999 ); static void Main(string[] args) { AtomHTTPresponse lAtomHTTPresponse = new AtomHTTPresponse(); Thread lThreadListener = new Thread( new ThreadStart( lAtomHTTPresponse.ListenerHandler ) ); lThreadListener.Start(); } private void ListenerHandler() { prTcpListener.Start(); for ( int lCntOuter = 0; lCntOuter < MAX_CONNECTIONS; lCntOuter++ ) { //lock ( this ) //{ Thread lThreadListener = new Thread( new ThreadStart( ConnectionHandler ) ); lThreadListener.Start(); //} } } private void ConnectionHandler() { TcpClient lTcpClient = prTcpListener.AcceptTcpClient(); NetworkStream lNetworkStream = lTcpClient.GetStream(); StreamReader lStreamReader = new StreamReader( lNetworkStream ); StreamWriter lStreamWriter = new StreamWriter( lNetworkStream ); HTTPpipe lHTTPpipe = new HTTPpipe( lTcpClient, lNetworkStream, lStreamReader, lStreamWriter ); prArrayListHTTPpipes.Add( lHTTPpipe ); lHTTPpipe.WriteToCLient( "<script language=\"javascript\">window.status = 0</script>" ); for ( int lCntInner = 0; lCntInner < prArrayListHTTPpipes.Count; lCntInner++ ) { ( prArrayListHTTPpipes[ lCntInner ] as HTTPpipe ).WriteToCLient( "<script language=\"javascript\">window.status = parseInt( window.status ) + 1</script>" ); } } } class HTTPpipe { public TcpClient puTcpClient; public NetworkStream puNetworkStream; public StreamReader puStreamReader; public StreamWriter puStreamWriter; public char[] puArrCharRequest = new char[256]; static string cStrResponse = "<script language=\"javascript\">window.status = 0</script>"; static string cStrHTTPheader = "HTTP/1.1 200 OK\r\n" + "Server: Microsoft-IIS/5.0\r\n" + "Date: Wed, 9 jan 2004 19:59:09 GMT\r\n" + "X-Powered-By: ASP.NET\r\n" + "Content-Type: text/html\r\n" + "Set-Cookie: ASPSESSIONIDASQSSARR=CCOBBLCBOLKOECFIANBGOBAI; path=/\r\n" // let it be for now. redundancy will be removed at a later time + "Cache-control: private\r\n\r\n"; public HTTPpipe( TcpClient iTcpClient, NetworkStream iNetworkStream, StreamReader iStreamReader, StreamWriter iStreamWriter ) { puTcpClient = iTcpClient; puNetworkStream = iNetworkStream; puStreamReader = iStreamReader; puStreamWriter = iStreamWriter; puStreamReader.Read( puArrCharRequest, 0, puArrCharRequest.Length ); // do nothing with the request but now we know we dont send a response before the request has been fully received. WriteToCLient( cStrHTTPheader ); WriteToCLient( cStrResponse ); } public void WriteToCLient( string iStrResponse ) { puStreamWriter.Write( iStrResponse ); puStreamWriter.Flush(); } public void Close() { puTcpClient.Close(); } } } Tag: Unmanaged ActiveX Tag: 80753
  - 19
    - The underlying connection was closed - Remoting.Channels.Http.HttpClientTransportSink Hi, I got this error. I search the web and found a long disscus and solutions for example at http://p2p.wrox.com/topic.asp?TOPIC_ID=4858 the problem I use remoting and not webservie. I dont have reference.cs file. do you have any solution? which function to overload ? wehre? TIA Gilad System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a receive. Server stack trace: at System.Runtime.Remoting.Channels.Http.HttpClientTransportSink.ProcessResponseException(WebException webException, HttpWebResponse& response) at System.Runtime.Remoting.Channels.Http.HttpClientTransportSink.ProcessMessage(IMessage msg, ITransportHeaders requestHeaders, Stream requestStream, ITransportHeaders& responseHeaders, Stream& responseStream) at System.Runtime.Remoting.Channels.SoapClientFormatterSink.SyncProcessMessage(IMessage msg) Exception rethrown at [0]: at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg) at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type) Tag: Unmanaged ActiveX Tag: 80752
  - 20
    - Accessing mapped drives from Framework 1.1 & COM+ I have a COM+ application that was written using Framework 1.0 and runs on Windows 2000. The COM+ app runs as domain user who has access to certain network shares. These shares are mapped on the server. There is no issue on Windows 2000. I installed the same app on Windows 2003 without installing Framework 1.0. Now the application says it cannot find the mapped drive. Do I need to change some configuration? Thanks. James Tag: Unmanaged ActiveX Tag: 80736
  - 21
    - how to make an object readonly in runtime? I have some data in a DataTable object that I'd like to put into a static class for the entire app to use, kind of like a cahced global value. The data in there should not change, but DataTable by default can be changed. Is there an easy way to make it read only. I can probably create my own wrapper class to accomplish this but hopefully there is a way to do this directly on the DataTable. Thanks in advance for any help Bob Tag: Unmanaged ActiveX Tag: 80721
  - 22
    - frame work for linux Im looking for a framework for linux if available because after i wrote the site i heard they use linux and need me to wroke in perl or cgi Tag: Unmanaged ActiveX Tag: 80710
  - 23
    - looking for sample:multiple view single document in C# or VB Hi, I am looking for sample of an application similar to outlook regarding UI when user select a tree node in the left pane a view is changed in the right pane (it does not necessarily support MFC doc view architecture ) thanks in advance Tag: Unmanaged ActiveX Tag: 80702
  - 24
    - Best practice to lock DB SQLServer records in VB.NET application Hi all; I wonder if you have an opinion about this matter: Besides using "Version Number Approach" and "Saving All Values Approach" http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vbcon/html/vbtskPerformingOptimisticConcurrencyChecking.asp suggested by MS for solving lock problems, is there any other options to do this? In my opinion there's one limitation in these methods: if you loose your connection to your db for some reason while comitting the transaction, how can you be sure the lock is in the rigth state? Can you use threads to lock and unlock records? If so, can someone point me to some kind of a sample or tutorial to learn more about it? Urgent! Thanks in advance! Tag: Unmanaged ActiveX Tag: 80697
  - 25
    - twain scanner can i import images from a twain device such like scanner ? how to do it using dotnet ? regards, Tag: Unmanaged ActiveX Tag: 80693

This is more of an RFC. Consider an ActiveX control which is able to run
hosted in a browser instance. The component is designed to run on the client
only so no code executes on the server. What benefits does this component
derive from being rewritten as a managed component?

I've been thinking about this for a little bit and I am of the opinion that
there will not be much benefit, since the ActiveX control runs inside the
browser instance which is itself unmanaged code. Additionaly, automation of
the component must occur on the client since the particular component is not
designed to run on the server. This automation cannot derive benefit from a
managed rewrite since the tools (scripting languages) available do not take
advantage of managed environments.

And what if the component had a server-side piece ( I think this is the
trivial case which can benefit from a rewrite into managed code).

I want to know if my ideas are technically sound.

--
Regards,
Alvin Bruney
[ASP.NET MVP http://mvp.support.microsoft.com/default.aspx]
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