Samples of MemoryMappedFile in C# or .NET

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  - 1
    - Can Borderless forms have a context menu in the start bar? Hi I'm currently developping a skinnable form by using a borderless form (Form.FormBorderStyle=None). Is it the right way to go in the first place? if it is. Assuming that when there is no border to the form there is no context menu when you right-click on your form in the start bar too (the one with Restore, Move, Size, Close et al.)... How can I make this context menu work again? Is there a way to tell the form to make it work even if the form is borderless? thanks ThunderMusic Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124577
  - 2
    - Question regarding Shared Functions or Subs I wonder if it is threadsafe to have a Shared Function or Sub like this: Public Class Data1 Public Shared Function Query1(Byref sCnxn as String, Byval sSql As String) As DataTable Dim oCnxn As New SqlConnection(sCnxn) Dim oCmd As New SqlCommand(sSql, oCnxn) Dim oDs As New DataSet ' Mark the Command as a SPROC oCmd.CommandType = CommandType.Text oCnxn.Open() Dim oDa As SqlDataAdapter = New SqlDataAdapter(oCmd) oDa.Fill(oDs, "result") oCmd.Dispose() oCnxn.Close() Dim dt As DataTable = oDs.Tables("result").Copy oDs.Clear() oDs = Nothing oDa = Nothing Return dt End Function End Class Will I have any problem with multiple concurrent web requests? Thanks Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124576
  - 3
    - Running 2.0 with 3.0 installed? If I upgrade to framework 3.0 and install Studio components for 3.0, will I still be able to create apps for the 2.0 platform exclusively? Meaning, if a client has 2.0 framework installed on their machine, can I provide a 2.0 (only) Winform app? Thanks, Brett Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124575
  - 4
    - how to update session state server on Windows 2003 x64 version Sir/Madam, After set the session mode="StateServer" in the Web.config I get follow error, Unable to use session state server because this version of ASP.NET requires session state server version 2.0 or above. within the services, the ASP.NET State Service is pointed to C:\WINDOWS\Microsoft.NET\Framework\v1.1.4322\aspnet_state.exe I have installed the Framework2.0 and Framework2.0 for 64, so there is C:\WINDOWS\Microsoft.NET\Framework64\v2.0.50727\aspnet_state.exe but I can not find the C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\aspnet_state.exe , and normally it will updated the state service to 2.0 when I install framework2.0 on windows 2003 standard edition. My server is windows 2003 x64 version, how can I update the session state server on it now? your help will be appreciated. sincerely, Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124574
  - 5
    - Event handling in Collections I have a class that inherits from NameObjectCollectionBase. For simplicity, the collection is called reports, and the individual objects in the collect are called report items. Each report item has a property called .value that throws an event everytime the value changes. What I would like to know is if there is a way to create event handlers at the collection level. Otherwords, can reports handle events for the report item collection? Any thoughts? Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124573
  - 6
    - Assembly Minimum Security Requirements Hi, Using VS 2005 Pro., I have built a Class Library (DLL) with several functions, subs, etc... I would like to determine the minimum security requirements. For some reason, the "Security" tab does NOT appear when designing Class Libraries (DLL's), therefore, I cannot use the "Calculate Permissions" button. I tried using PERMCALC.exe, but the resulting .XML file is quite involved and hard to decipher. It has many "demands" nodes throughout and thus extremely time consuming to go through. Is there any way quickly determine .DLL security permission requirements (minimum), or somehow "attach" the XML file generated by PERMCALC.exe to the assembly/DLL in question? There must be an easier way than going through thousands of lines of code trying to find a security "Demand". Regards, Giovanni Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124572
  - 7
    - Changing Route Table from C# I've posted this question in 'microsoft.public.dotnet.framework.compactframework' as well, but despite the great help I still haven't solved the problem. So before going the C++ route I would like to see if anybody in this group may have the answer. What I'm trying to do is change the route table of my Windows Mobile 5 Pocket PC (.Net CF) device (TyTN) using C#. This is probably similar as doing it on standard CF. Using Iphlpapi.dll I can retrieve the route table, but I am unable to change/add a route. I have specified the following structs/pinvokes: =========START=========== [StructLayout(LayoutKind.Sequential)] public struct MIB_IPFORWARDROW { public UInt32 dwForwardDest; //destination IP address. public UInt32 dwForwardMask; //Subnet mask public UInt32 dwForwardPolicy; //conditions for multi-path route. Unused, specify 0. public UInt32 dwForwardNextHop; //IP address of the next hop. Own address? public UInt32 dwForwardIfIndex; //index of interface public UInt32 dwForwardType; //route type public UInt32 dwForwardProto; //routing protocol. public UInt32 dwForwardAge; //age of route. public UInt32 dwForwardNextHopAS; //autonomous system number. 0 if not relevant public int dwForwardMetric1; //-1 if not used (goes for all metrics) public int dwForwardMetric2; public int dwForwardMetric3; public int dwForwardMetric4; public int dwForwardMetric5; } [StructLayout(LayoutKind.Sequential)] public struct MIB_IPFORWARDTABLE { public int dwNumEntries; //number of route entries in the table. public MIB_IPFORWARDROW[] table; } [DllImport("Iphlpapi.dll")] [return: MarshalAs(UnmanagedType.U4)] public static extern int CreateIpForwardEntry(ref MIB_IPFORWARDROW pRoute); [DllImport("Iphlpapi.dll")] [return: MarshalAs(UnmanagedType.U4)] public static extern int DeleteIpForwardEntry(ref MIB_IPFORWARDROW pRoute); [DllImport("Iphlpapi.dll")] [return: MarshalAs(UnmanagedType.U4)] public static extern int SetIpForwardEntry(ref MIB_IPFORWARDROW pRoute); [DllImport("Iphlpapi.dll")] [return: MarshalAs(UnmanagedType.U4)] public static extern int GetIpForwardTable(byte[] pIpForwardTable, out int pdwSize, bool bOrder); =========END=========== I invoke these methods as follows: =========START=========== public int createIpForwardEntry(UInt32 destIPAddress, UInt32 destMask, UInt32 nextHopIPAddress, UInt32 ifIndex) { MIB_IPFORWARDROW mifr = new MIB_IPFORWARDROW(); mifr.dwForwardDest = destIPAddress; mifr.dwForwardMask = destMask; mifr.dwForwardPolicy = Convert.ToUInt32(0); mifr.dwForwardNextHop = nextHopIPAddress; mifr.dwForwardIfIndex = ifIndex; //? mifr.dwForwardType = Convert.ToUInt32(4); mifr.dwForwardProto = Convert.ToUInt32(3); mifr.dwForwardAge = Convert.ToUInt32(0); mifr.dwForwardNextHopAS = Convert.ToUInt32(0); mifr.dwForwardMetric1 = -1; mifr.dwForwardMetric2 = -1; mifr.dwForwardMetric3 = -1; mifr.dwForwardMetric4 = -1; mifr.dwForwardMetric5 = -1; return CreateIpForwardEntry(ref mifr); } =========END=========== All IP addresses are added as unsigned ints (double checked whether they are correct. I even tried adding a row that I just successfully retrieved (thereby skipping my own structure). If that gives me an error code 87 (invalid param). Is there anybody here that has successfully done this or has a few relevant pointers? Preferably C# examples, but C++ examples are a step in the right direction. Thanks! Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124570
  - 8
    - access to path ' ' is denied when using createdirectory() I am pretty new to VB.Net, but I am in the process of creating an app that will force a folder to create, along with its subdirectories, when it doesn't exist. Every time I run the following code "Call Directory.CreateDirectory(<path.)" I get "access to the path "<path>" is denied". The folder I am trying to create is on a separate server with access controlled by a domain group. My account is in a domain group with update access. I can create the folder manually. I tried using impersonation functionality, but that doesn't seem to work either. Can anyone give me any assistance?? Thanks!! Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124569
  - 9
    - ClickOnce program fails to run properly after update I am using ClickOnce to distribute a program. It works well except for one detail. When a new version is installed, the program does not initialize properly immediately after the update. The sequence is the user starts the program, is informed a new version is ready, installs it, when it is complete and the main form is displayed, the user needs close the form, and restarts the program to the form to initialize properly. The problem is that several controls are left disabled. The program uses MDI with a main form and several child forms as needed. The problem is on the main form. The controls that are not enabled are two list boxes, a tool bar, and a user control containing a numeric control. The menu and form tool bar initialize ok. The form uses the table layout control and several panelsâ?? controls. The controls that do not initialize properly are in there own panel in a cell of the table layout control. It is like the list boxes are not there, they control the other controls determining when they are enabled. One list box is bound to a table and is filled. However, the value change event does not seam to be working. The other list box, contains a the list of the available MDI child forms and is filled in manually. It list is not filled in or updated even when I generate a new MDI child form. Restarting the program and every thing works normally. How do I get the form to run normally form the start? -- Mike Reed Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124568
  - 10
    - How to speed up reading of large disk files Sorry if this is the wrong news group for this post. I have some large disk files (15-20 MB) that are made up of many records of different types and sizes. I use a BinaryReader to process all the data sequentially (i.e. with many reads operations) and load it into my .NET app. I will have several .NET Apps running on the same computer each of which will need to read these files but never change them. The performance is not awful, but I would like it to be faster. I have looked at Memory File mapping, RAM disks, etc. but I would like to know if someone has a better idea especially if it stays within normal .NET I/O funcationality. Thanks in advance for your help. Valerie Hough Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124565
  - 11
    - How to access a network drive from a Windows service? I have a VB .NET app that lets you create a DTS Package that copies data from an SQL Server to a database located in the specified path (it should work with both local and network drives). You can either run the package from within the application or as a Windows service. If I specify a network drive and run the package from the app, the data is being copied fine, but the service gives me "Table not accessible" error. My understanding is I have to configure my Windows service to run with the proper domain user account. In other words, I need to set my service to log in with an account with the appropriate permissions to the network path I want to access. What's the syntax for that? What functions do I have to use? I could not find any sample code. Thank you for help. Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124559
  - 12
    - Exception handling behaves differently in debug and release versio I have a class library which throws exceptions on errors. I have an exception handler several levels above where the exception is thrown to catch exceptions. When I run the app in the debugger the exception handler is called, however, when running the app outside of the debugger I get the unhandled exception dialog and my exception handler is not called. I am using V2.0 and VS 2005. Does anyone know why this is? Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124553
  - 13
    - certificazioni MCAD per il fmw 3.0 Quando verranno proposte le nuove certificazioni per il nuovo framework? Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124550
  - 14
    - Debugger Step Over Attribute Hi, is there an debugger step over attribute that I can use on properties? For instance, I have a singlton class with an "Instance" property: public MyClass Instance { get { if (m_instance == null) { m_instance = new MyClass(); } return m_instance; } } It's annoying when i have a function like, MyClass.Instance.DoSomething(). I have to use the step into command, but first it steps into the property, then i have to go out of that and step in again to go into the actual function. Thanks, Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124549
  - 15
    - How to dialup? I need to activate an Internet dialup connection from a .NET application; how can this be done? Thanks Massimo Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124547
  - 16
    - how to get the namespace inside a static method? Hi there, I have a class with a static method, how can I find the namespace of the class from inside the method. TIA Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124544
  - 17
    - DataAdapter.Update PB with a new database Hi, With a NEW database, I have an auto-generate DataSet ()with menu "Add new DataSource...") with two DataTables, parentTable and childTable, and a relation between them. I fill these two tables with five records, then try to update database with these records, using the autogenerate parentDataTableTableAdapter and childTableTableAdapter, after having set a ForeignKeyConstraint on childTable, related to the relation. Some problems appear when I update a new created database. First problem : when I use parentDataTableTableAdapter.Update(), an exception is thrown, telling me that a row ID is already present in parentTable. The problem comes from the autoincrementseed of id column that is set to 0, althrough it is set to 1 in the database. So then first row is updated, its id in DataSet is set to 1, already in table. To avoid this feature, I found two solutions : - Set autoincrement seed to 1. But, a new problem can appear if one record is already in database - Set dataSet.EnforceConstraints to false In this last case, I have a new problem appearing : after the parentTable update, the child table foreign key is set to the last updated row of parentTable. This trouble is certainly due to MSDN advice (ForeignKeyConstraint) : "Constraints are not enforced unless the EnforceConstraints property is set to true" But update works fine when the database has already some records ! So, please, how can I do to avoid all these problems ? Thanks in advance, FG Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124538
  - 18
    - MyProj.svhost.exe running alone Hi group I am testing the Visual 2005 Express Edition. I have a solution with a few projects (WinForms, and ClassLibrary), the start up projet is MyProject. When i open the solution using visual, MyProject.svhost.exe start imm=E9diately.I cant run my project using debug. i can run using the "run without debug" option. If i try to kill MyProjet.svhost.exe in my windows App manager, it is killed, and immediately recreated (by visual). What is my problem ? I don't know how to work, please help ? ROM Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124537
  - 19
    - stupid .net framework 3.0 ? Ok guys i know this is a stupid question but here goes. I decided tonight was going to be the night to learn this new .net framework 3.0. I downloaded the new release of .net framework 3. I also installed windows SDK & the visual studio plugins for WF,WCF, WPF. Ok my first quest was try research this LINQ stuff a little bit bit suprised to see nothing relating to the .Net framework 3.0 in visual studio except a .Net framework 3.0 that had stuff like a template for creating XAML app which im not there yet so i don't want to use. Ok one of the first things i was going to see is if "var" was even there and it wasn't. SO i tried to go add System.Query manually through the .Net references and its not there. What gives? What do i need to do so i can start coding stuff with the .Net framework? Id like to do a working example of an windows forms application using LINQ. Any help would be apprecaited. thanks, ncage Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124531
  - 20
    - BHOs, I.E. ToolBars, and such I am having to get involved in writing Browser Helper Objects in Managed Code and to write toolbars and interface the two. Because BHOs have been clasically written in C++ using ATL, most of the discussions are in that arena. Are there any forums or other types of technical exchanges regarding this type of development in .Net? -- Regards, Gary Blakely Dean Blakely & Associates www.deanblakely.com Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124529
  - 21
    - dose the attribute know what the class or property is? hi everybody, i am using some attribute for a proerty. could the attribute get some class or property information by itself? i mean, dose the attribute know what the class or property is? and how? thanks! Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124525
  - 22
    - using preprocessor directive for cross framework compatibility Hello all, I have some common classes that I routinely use with all the dotnet projects that I work with. I have these classes in a separate file so that it becomes easy for me to include them into projects. Some of these projects are done in visual studio 2003 and some are in visual studio 2005. lately I have started using some of the classes (FTPWebrequest) which are specific to the dotnet framework 2.0 (VS 2005). Now this file cannot be included into the vs2003 projects as they would give compile errors. I did not want to to maintain two different files for these 2 environments. I know that we can use preprocessor directives (#if ) for this but I did not know how to identify the IDE version (VS 2003 or VS 2005) to use in the If directive. Can you help me with this. thanks in advance, Praveen Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124518
  - 23
    - Need help changing AxWebBrowser (COM) code to .NET Web Browser! object obj = axWebBrowser1.GetOcx(); IOleObject oc = obj as IOleObject; oc.SetClientSite(this); How can I make this code work with the .NET 2.0 Web Browser Control Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124509
  - 24
    - Trace.WriteLine(object value) - causes "System.InvalidOperationException: Collection was modified; enumeration operation may not execute." For some reason I am getting the following exception when calling Trace.WriteLine(object value): "System.InvalidOperationException: Collection was modified; enumeration operation may not execute." if (Trace.Listeners.Count > 0) { Trace.WriteLine(entry); // line 424 } - Here is the stack trace: ********* Exception details: ********** Unexpected exception. ---> System.InvalidOperationException: Collection was modified; enumeration operation may not execute. at System.Collections.ArrayList.ArrayListEnumeratorSimple.MoveNext() at System.Diagnostics.TraceInternal.WriteLine(Object value) at System.Diagnostics.Trace.WriteLine(Object value) at MyLogger.Write(LogEntry entry) in MyLogger.cs:line 424 - If I where to instead do the following, it would work. So this seems that something in the framework is attempting to modify the Trace.Listeners collection: for (int i = 0; i < Trace.Listeners.Count; i++) { TraceListener traceListener = Trace.Listeners[i]; traceListener.WriteLine(entry); } Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124506
  - 25
    - Trace.WriteLine(object value) - causes "System.InvalidOperationException: Collection was modified; enumeration operation may not execute." For some reason I am getting the following exception when calling Trace.WriteLine(object value): "System.InvalidOperationException: Collection was modified; enumeration operation may not execute." if (Trace.Listeners.Count > 0) { Trace.WriteLine(entry); // line 424 } - Here is the stack trace: ********* Exception details: ********** Unexpected exception. ---> System.InvalidOperationException: Collection was modified; enumeration operation may not execute. at System.Collections.ArrayList.ArrayListEnumeratorSimple.MoveNext() at System.Diagnostics.TraceInternal.WriteLine(Object value) at System.Diagnostics.Trace.WriteLine(Object value) at MyLogger.Write(LogEntry entry) in MyLogger.cs:line 424 - If I where to instead do the following, it would work. So this seems that something in the framework is attempting to modify the Trace.Listeners collection: for (int i = 0; i < Trace.Listeners.Count; i++) { TraceListener traceListener = Trace.Listeners[i]; traceListener.WriteLine(entry); } Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124505
- Next
  - 1
    - check caller before ServiceBase.Run? I have a service application in C#. If the user double-clicks the service EXE, I want to display a form with options to install or uninstall. In other words, I want: static void Main() { if (invoked by user) { // <-- how to implement this? // display GUI... } else { // invoked by SCM ServiceBase.Run(new ServiceBase[] { new MyServiceClass() }); } } How can I determine how the EXE was invoked? Thanks! Steve Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124504
  - 2
    - Printing images from a background component I need to print the images from a background component which is not a part of WinForm or WebFrom application. I can start a Print command within the component and it will work on some printers, sort of.. On many others printers the output is garbled. I guess some printers are capable of using raw tiff/jpg data while others aren't. I was hoping that there is some magic Printer class in Framework that would solve my problem... There is a lot of printer-related classes available for WinForms, but I just have a background component that needs to print.. Is there a hope? Thanks, -Stan Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124499
  - 3
    - Raw TCP/IP library? Hi to all :-) I need to know if there is (inside the main .NET framework or available as a library) any TCP/IP implementation which can be run over a serial line. I know the request can sound quite strange, so here are some more elements :-) I'm testing a client/server application which will be composed of mobile embedded clients connected to the Internet through GPRS modems and a central server (written in .NET/C#) which will sit there receiving data from the clients. The actual clients' CPU will be a mcirocontroller, so their firmware will be written in plain C language, but for now the actual hardware isn't available, so I'm just simulating them using standard Windows program and TCP/IP sockets. The GPRS modem is a device which can be accessed through a serial port and, when given proper commands (some proprietary extensions of the AT set), establishes a GPRS connection, which acts just like a standard modem connection to an ISP; after doing this, the controlling program needs to run TCP/IP (PPP) over the "virtual" serial line which is created. Since I'm testing this modem's behaviour from a Windows application, I need to go through the whole process of establishing a connection and handling it; I managed to use Windows to do this by connecting the modem to a computer, installing a "standard modem" on the same serial port and creating a DUN connection which, instead of dialing a phone number, just sends the proper AT commands to establish the GPRS connection; this way, Windows' own TCP/IP stack is used. Everything works fine. Now I need to handle this from an application, so I'm in need of a TCP/IP protocol stack (with PPP!) to run over the GPRS connection, in order to test the whole process; the actual clients will of course have their own TCP/IP stack: the microcontrollers I'll use comes with proper C libraries. I'd like to know if there is anything available for .NET which can run TCP/IP and PPP over a serial line; if there isn't anything available for .NET, a standard C library could also do, because I'm anyway going to have to use one for the final development process, so I can just use it for this intermediate step and write the simulated clients in C. Thanks for any suggestion about this strange issue :-) Massimo Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124497
  - 4
    - Error 4786 with Windows Service After my Windows service runs for a few days (sometimes 5, sometimes 3), I'm getting the following exception in the Event Viewer: Event Type: Error Event Source: COM+ Event Category: Unknown Event ID: 4786 Date: 10/31/2006 Time: 1:29:50 AM User: N/A Computer: KII-SERV-SQL Description: The system has called a custom component and that component has failed and generated an exception. This indicates a problem with the custom component. Notify the developer of this component that a failure has occurred and provide them with the information below. Component Prog ID: 1[ODBC][Env 45814e8] Method Name: IDispenserDriver::CreateResource Process Name: DTSService.exe Exception: C0000005 Address: 0x04972018 Call Stack: pvm90sec! + 0x2018 pvm90sec! + 0x2516 I tried looking for more information on the web, but I haven't really found anything that would explain what's possibly causing the exception. Why it would fail only after a certain number of days? Thank you for any help. Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124495
  - 5
    - Can I use WCF right now? Is it possible to convert my app which is in Framework 2 to 3 using VS 2005 and release it to customer? What approach must I take? Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124487
  - 6
    - How to move from .NET Remoting to WCF What is the best way? Is there a good article? Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124486
  - 7
    - Loss message in Socket Async mode Hi, all Did not find a .Net Communication forum to post. I am soing a client/server message system and using C#.net socket and Async mode. Pretty much as described in article http://www.developerfusion.co.uk/show/3997/3/ But I have a big issue with this approach and I am not what did I do wrong. the client send message so quick that when I loss the second message. I need to call endReceive in my Callback function and process the first message, now the second message is arrived and since I have not call beginReceive, then, I loss the second message. Am I doing wrong or is that unavoidable? Thanks in advance -rockdale -------------------------------------------------------------- source code from the article is attached. byte[] m_DataBuffer = new byte [1024]; IAsyncResult m_asynResult; public AsyncCallback pfnCallBack ; public Socket m_socClient; // create the socket... public void OnConnect() { m_socClient = new Socket (AddressFamily.InterNetwork,SocketType.Stream ,ProtocolType.Tcp ); // get the remote IP address... IPAddress ip = IPAddress.Parse ("10.10.120.122"); int iPortNo = 8221; //create the end point IPEndPoint ipEnd = new IPEndPoint (ip.Address,iPortNo); //connect to the remote host... m_socClient.Connect ( ipEnd ); //watch for data ( asynchronously )... WaitForData(); } public void WaitForData() { if ( pfnCallBack == null ) pfnCallBack = new AsyncCallback (OnDataReceived); // now start to listen for any data... m_asynResult = m_socClient.BeginReceive (m_DataBuffer,0,m_DataBuffer.Length,SocketFlags.None,pfnCallBack,null); } public void OnDataReceived(IAsyncResult asyn) { //end receive... int iRx = 0 ; iRx = m_socClient.EndReceive (asyn); char[] chars = new char[iRx + 1]; System.Text.Decoder d = System.Text.Encoding.UTF8.GetDecoder(); int charLen = d.GetChars(m_DataBuffer, 0, iRx, chars, 0); System.String szData = new System.String(chars); WaitForData(); } Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124479
  - 8
    - problems with xmlserializer on domain machine Hello. I have developed an application (an office addin).The application works fine with no error messages on my devoping machine (that machine is not connected to any domains). I have problems getting this application to run on a computer where the user is on a domain (as in a big company where you log on to the company domain). The funny thing is that the application works fine in outlook. But not in word or excel... The error occurs when trying to create the proxy object. This proxy objects creates successfully when run from outlook. The stack trace from my error is as follows: at System.IO._Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy) at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access) at System.IO.FileStream.Compiler.TempFileCollection.EnsureTempNameCreated() at System.IO.FileStream.Compiler.TempFileCollection.AddExtension(String fileExtension, Boolean keepFile) at System.IO.FileStream.Compiler.TempFileCollection.AddExtension(String fileExtension) at Microsoft.CSharp.CSharpCodeGenerator.System.CodeDom.Compiler.ICodeCompiler.CompileAssemblyFromSourceBatch(CompilerParameters options, String[] sources) at System.codeDom.Compiler.CodeDomProvider.CompileAssemblyFromSource(CompilerParameters options, String[] sources) at System.Xml.Serialization.TEmpAssembly.GenerateAssembly(XmlMapping[] xmlMappings, Type[] types, String defaultNamespace, Evidence evidence, CompilerParameters parameters, Assembly assembly, Hashtable assemblies) at System.Xml.Serialization.TempAssembly..ctor(XmlMapping[] xmlMappings, Type[] types, String defaultNAmespace, String location, Evidence evidence) at System.Xml.Serialization.XmlSerializer.FromMappings(XmlMapping[] mappings, Type type) at System.Web.Services.Protocols.SoapClientType..ctor(Type type) at System.Web.Services.Protocols.SoapHttpClientProtocol..ctor() After reading several posts on the internet I found something about calling the XmlSerializer could create problems. This because it has to compile code and has to make a temporary file to write to. Is there anything is this lead or are ther other things that may cause my problems? I'll be very happy for any hints or tips you can give me :) Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124477
  - 9
    - Call "Sub Main" in (WPF) XAML-Application? I have installed Framework 3.0 and Visual Studio 2005 extensions for .NET Framework 3.0 (WCF & WPF), November 2006 CTP. If I make a new WindowsApplication the StartupObject is not set. But the Application starts with Window1.xaml If set the StartupObject to "Sub Main" What more must I do that I can start the Application with the "Sub Main". Or in other words, how can start my Application first with a Custom Methode where I can define the Window-XAML to show? Best regards Horst Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124471
  - 10
    - Application terminates due to access violation? Does anyone knows the meaning with KB823140 and KB903886? These articles treat the issue of "Access Voilation" in .NET framework. I have an application developed in C# that sometimes simply dies. No messages, no error codes, no exceptions. A few days ago I got a tip that this might be caused by an "Access Violation" when calling methods in COM components. Daniel Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124469
  - 11
    - Socket close notification I am so surprised to find that there is no close notification in socket class. Like OnClose in MFC CAsyncSocket. Any suggestions please ...... Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124467
  - 12
    - Socket.BeginReceive with timeout Is there any way that Callback function returns, either it has got some data, or the time out has occured. Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124466
  - 13
    - Bug: Localization for Button Control in inherited UserControl Hi everyone, After trying to make this work for a while I didn't get a chance to obtain what i was supposed to, so here is the description of the bug (I think) I found : Steps to reproduce : 1. Create a new Windows Application project. 2. Create a UserControl (ex: UCMenu) and set it to localizable in design time. 3. Put one Label and one Button on it(ex. name: buttonToLook), set on them different Text properties values depending on languages (ex: (default) & fr). 4. Expose Text properties of all 4 controls with localizable attribute on it ([Localizable(true)]). 4. Create a UserControl (ex. name: UCInheritedUCMenu) inheriting from UCMenu, set it to localizable in design time. 5. Put UCInheritedUCMenu on the project main form (and set form also to Localizable). 6. In Program.cs, set Thread.CurrentThread.CurrentUICulture to "fr". 7. Run the application and notice that only buttonToLook does not take its localisable value (you can add other controls on UCInheritedUCMenu or form to see that only buttonToLook is not localized). 8. Comment Text property exposure for buttonToLook and run the application again : text of button is now localized. Thanks for all your help. Hope You'll give a correction for this :-) Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124465
  - 14
    - Spontaneous NullReferenceException in System.Windows.Forms In our .NET Framework 1.1 Application that is installed on about 800 PC's we have 5 PC's that has spontaneous NullReference Exceptions (Windows XP & 2000 uptodate) in System.Windows.Forms. We already removed any Crossthread Calls. Reinstalling and replacing the computer hasn't brought us any better results. In some cases this exception only appears twice a week, sometimes 20 times a day depending on workingday or / and computer. Here are the two different call stacks (sometime it appears also with SetActiveCore: Stack Trace: at System.Windows.Forms.UnsafeNativeMethods.PeekMessage(MSG& msg, HandleRef hwnd, Int32 msgMin, Int32 msgMax, Int32 remove) at System.Windows.Forms.ComponentManager.System.Windows.Forms.UnsafeNativeMethods+IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData) at System.Windows.Forms.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context) at System.Windows.Forms.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context) at System.Windows.Forms.Application.RunDialog(Form form) at System.Windows.Forms.Form.ShowDialog(IWin32Window owner) at System.Windows.Forms.Form.ShowDialog() Stack Trace: at System.Windows.Forms.SafeNativeMethods.ShowWindow(HandleRef hWnd, Int32 nCmdShow) at System.Windows.Forms.Control.SetVisibleCore(Boolean value) at System.Windows.Forms.Form.SetVisibleCore(Boolean value) at System.Windows.Forms.Form.ShowDialog(IWin32Window owner) at System.Windows.Forms.Form.ShowDialog() Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124463
  - 15
    - Other printing problem (resolution not honored) Before printing I create an instance of PrintDocument as Follow (beware, pseudo code) //============================== PrinterResolution pr = new PrinterResolution(); pr.X= 600; pr.Y= 600; pr.Kind = PrinterResolutionKind.High; PrinterSettings printer = new PrinterSettings(); printer.PrinterName = "my printer"; printer.PageSettings.PrinterResolution = pr; PrintDocument pd = new MyPrintDocument(); pd.PrinterSettings = ps; //============================== That seems to work, even in OnPrintPage() the printer resolution is the one I requested. On top of that the resolution is one supported by the printer (according to the PrinterSettings class) Yet it doesn't seemed to be honoured! :( Any tip? Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124454
  - 16
    - an existing connection was forcibly closed by the remote host Hello, I am developing an HTTP/1.1 proxy server in c#.net. I am encountering the following exception when I try to send the response body back to the client: "An existing connection was forcibly closed by the remote host". This exception is thrown by the Socket.Send() method (where the specific socket in this case is the client socket). Additionally, if I do not send the response headers back to the client, I do not get this error when sending the response body. Any ideas/pointers on this issue? Thanks, Vishal Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124450
  - 17
    - Printing Problem Before printing I create an instance of PrintDocument as Follow (beware, pseudo code) //============================== PaperSize ps = new PaperSize(); ps.Kind = PaperKind.A3 ps.Width = 1169; ps.Height = 1654; PrinterSettings printer = new PrinterSettings(); printer.PrinterName = "my printer"; printer.PageSettings.PaperSize = ps; PrintDocument pd = new MyPrintDocument(); pd.PrinterSettings = ps; //============================== As you culd see I set the page's size (I set only value listed in the list of PaperSize of the printer). Now my problem is, whatever I do, it seems do ignore my page settings!!! Am I missing something? Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124449
  - 18
    - Handling unknown elements with a ConfigurationElement Hi, Since the IConfigurationSectionHandler interface has been deprecated since the introduction of .NET 2.0, I'm trying to use the new configuration classes to handle a custom configuration section. I've gone through all the samples and MSDN docs, but none of them answer my question. What is specific (I think) is that I want to have a child element that is not known until runtime: <processingService> <processes> <process name="Process1" type="SomeNamespace.Process1, SomeAssembly"> ....elements specific to the Process1 class </process> <process name="Process2" type="SomeNamespace.Process2, SomeAssembly"> ....elements specific to the Process2 class </process> </processes> </processingService> Essentially, I want to allow each <process> element to have some child elements only known by the class that it refers to (e.g. Process1). I've defined the ConfigurationSection, ConfigurationElementCollection, ConfigurationElements and ConfigurationProperties as it should, and everything works fine until I add some arbitrary child elements. The configuration framework then throws an exception resulting from the unrecognized elements. As a workaround, I can prevent that exception by overriding the OnDeserializeUnrecognizedElement method of the ConfigurationElement that represents the <process> element. I can even extract the child XML and store it somewhere. But with that, I want to be able to deserialize that XML to a ConfigurationElement subclass provided by the ProcessX class (because they are the only ones who should know what that XML means). Unfortunately, there is no method or interface I can find to manually serialize some XML to a ConfigurationElement subclass. Question 1: What is the preferred way of dealing with unknown child elements in .NET 2.0? Question 2: How can I programmatically (de)serialize XML to/from a ConfigurationElement subclass which has properties that have [ConfigurationProperty] attributes on them. Dennis Doomen ICT Consultant / Software Architect Ordina SI&D Development Centre Microsoft Ringwade 1 3439 LM Nieuwegein Email: dennis.doomen@ordina.nl Weblog: blog.smart-ms.ordina.nl en www.dennisdoomen.net Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124437
  - 19
    - Handling unknown elements with a ConfigurationElement Hi, Since the IConfigurationSectionHandler interface has been deprecated since the introduction of .NET 2.0, I'm trying to use the new configuration classes to handle a custom configuration section. I've gone through all the samples and MSDN docs, but none of them answer my question. What is specific (I think) is that I want to have a child element that is not known until runtime: <processingService> <processes> <process name="Process1" type="SomeNamespace.Process1, SomeAssembly"> ....elements specific to the Process1 class </process> <process name="Process2" type="SomeNamespace.Process2, SomeAssembly"> ....elements specific to the Process2 class </process> </processes> </processingService> Essentially, I want to allow each <process> element to have some child elements only known by the class that it refers to (e.g. Process1). I've defined the ConfigurationSection, ConfigurationElementCollection, ConfigurationElements and ConfigurationProperties as it should, and everything works fine until I add some arbitrary child elements. The configuration framework then throws an exception resulting from the unrecognized elements. As a workaround, I can prevent that exception by overriding the OnDeserializeUnrecognizedElement method of the ConfigurationElement that represents the <process> element. I can even extract the child XML and store it somewhere. But with that, I want to be able to deserialize that XML to a ConfigurationElement subclass provided by the ProcessX class (because they are the only ones who should know what that XML means). Unfortunately, there is no method or interface I can find to manually serialize some XML to a ConfigurationElement subclass. Question 1: What is the preferred way of dealing with unknown child elements in .NET 2.0? Question 2: How can I programmatically (de)serialize XML to/from a ConfigurationElement subclass which has properties that have [ConfigurationProperty] attributes on them. Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124436
  - 20
    - How can I use Regasm on server? Hello all. I have an assembly that needs to be registered on a server for use with SQL Server 2k. Locally I can run Regasm from the VS.NET command window and that's that. But how can I get the assembly registered on the (or any) server? I have the dll, snk...all that, but I can't figure out how to register the thing so my procs don't return the "Invalid Class String" error (for lack of a ProgID)? I'm very new to having to use this tool, so I may be just overlooking something pretty basic. Thanks for your help! Bryan Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124432
  - 21
    - FileSystemWatcher help! Okay, I am writing a service that monitors the file system on one of our servers and I can take of that in a cinch. However, I found no properties or methods available to see who the user is that controls the process performing the deletion. I also need to know what application is doing the delete. I only want to know when a user is manually delete a file through windows explorer. Any suggestions? Any P/Invoke hooks? Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124424
  - 22
    - IO.Compression and Encryption Hi, Environment: VB 2005 Professional Both ends, its the application which is doing the functionalities. At the despatch end, We have a text file which is to be compressed and encrypted and sent over to the recepient. At the recepient end, the file is decrypted and then decompressed. Say the original file is CreateTestPort3.txt CreateTestPort3.txt: 1306 KB (original file) TestGZipped:151 KB (compressing the original file using GZipStream) EncryptText:151 KB (encrypting the compressed file) DecryptText: 76 KB (decrypting the earlier file) CreateTestPort3GOriginal: 0 KB (decompressing the file) We receive an error at this stage: Error : An unhandled exception of type 'System.IO.InvalidDataException' occurred in System.dll Additional information: The magic number in GZip header is not correct. Make sure you are passing in a GZip stream. Can anyone point out what are we doing wrong? If we just compress and decompress the file using the same code, its perfect. If we encrypt and decrypt the file using the same class, its perfect. But if we do the combination of compression and encryption, the file is totally messed up. Any reasons? For the sake of testing, we did both the functionalities of recepient and despatch end in the same project... The code for above is here: Dim SecKey As String = "Tashgktt" Private Sub cmdComGZipped_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdComGZipped.Click Dim outfile, infile As FileStream Dim zipStream As GZipStream Dim sw As StreamWriter Dim sr As StreamReader Dim ms As MemoryStream Dim info As FileInfo infile = New FileStream("Y:\CreateTestPort3.txt", FileMode.Open, FileAccess.Read) outfile = New FileStream("Y:\TestGZipped.xip", FileMode.Create, FileAccess.Write) zipStream = New GZipStream(outfile, CompressionMode.Compress, False) sr = New StreamReader(infile) sw = New StreamWriter(zipStream) Do While Not sr.EndOfStream sw.WriteLine(sr.ReadLine) Loop sw.Close() sr.Close() zipStream.Close() ' important to close this first to flush compressed stream outfile.Close() ' important to close this second to flush output stream infile.Close() info = New FileInfo("Y:\TestGZipped.Xip") MsgBox(info.Length.ToString) '//Encrypt the file EncryptFile("Y:\TestGZipped.xip", "Y:\EncryptText.enc", SecKey) End Sub Private Sub cmdDecomGZipped_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdDecomGZipped.Click Dim outfile, infile As FileStream ' Dim ZipStream As GZipStream Dim sw As StreamWriter Dim sr As StreamReader Dim info As FileInfo '//Decrypt the file DecryptFile("Y:\EncryptText.enc", "Y:\DecryptText.XIP", SecKey) infile = New FileStream("Y:\DecryptText.XIP", FileMode.Open, FileAccess.Read) outfile = New FileStream("Y:\CreateTestPort3GOriginal.txt", FileMode.Create, FileAccess.Write) ZipStream = New GZipStream(infile, CompressionMode.Decompress, False) sr = New StreamReader(ZipStream) sw = New StreamWriter(outfile) Do While Not sr.EndOfStream sw.WriteLine(sr.ReadLine) Loop sw.Close() sr.Close() ZipStream.Close() ' important to close this first to flush compressed stream outfile.Close() ' important to close this second to flush output stream infile.Close() info = New FileInfo("Y:\CreateTestPort3GOriginal.txt") MsgBox(info.Length.ToString) End Sub Error : An unhandled exception of type 'System.IO.InvalidDataException' occurred in System.dll Additional information: The magic number in GZip header is not correct. Make sure you are passing in a GZip stream. The Encrypt/Decrypt is done by the following: Imports System.IO Imports System.Security.Cryptography Imports System.Runtime.InteropServices Imports System.Text Module EncryptDecrypt ' Call this function to remove the key from memory after it is used for security. <DllImport("kernel32.dll")> _ Public Sub ZeroMemory(ByVal addr As IntPtr, ByVal size As Integer) End Sub ' Function to generate a 64-bit key. Function GenerateKey() As String ' Create an instance of a symmetric algorithm. The key and the IV are generated automatically. Dim desCrypto As DESCryptoServiceProvider = DESCryptoServiceProvider.Create() ' Use the automatically generated key for encryption. Return ASCIIEncoding.ASCII.GetString(desCrypto.Key) End Function Sub EncryptFile(ByVal sInputFilename As String, _ ByVal sOutputFilename As String, _ ByVal sKey As String) Dim fsInput As New FileStream(sInputFilename, _ FileMode.Open, FileAccess.Read) Dim fsEncrypted As New FileStream(sOutputFilename, _ FileMode.Create, FileAccess.Write) 'Dim Key = sKey 'Dim IV = sKey Dim DES As New DESCryptoServiceProvider() 'Set secret key for DES algorithm. 'A 64-bit key and an IV are required for this provider. DES.Key = ASCIIEncoding.ASCII.GetBytes(sKey) 'Set the initialization vector. DES.IV = ASCIIEncoding.ASCII.GetBytes(sKey) 'Create the DES encryptor from this instance. Dim desencrypt As ICryptoTransform = DES.CreateEncryptor() 'Create the crypto stream that transforms the file stream by using DES encryption. Dim cryptostream As New CryptoStream(fsEncrypted, _ desencrypt, _ CryptoStreamMode.Write) 'Read the file text to the byte array. Dim bytearrayinput(fsInput.Length - 1) As Byte fsInput.Read(bytearrayinput, 0, bytearrayinput.Length) 'Write out the DES encrypted file. cryptostream.Write(bytearrayinput, 0, bytearrayinput.Length) cryptostream.Close() fsInput.Close() fsEncrypted.Close() End Sub Sub DecryptFile(ByVal sInputFilename As String, _ ByVal sOutputFilename As String, _ ByVal sKey As String) 'Dim Key = sKey 'Dim IV = sKey Dim DES As New DESCryptoServiceProvider() 'A 64-bit key and an IV are required for this provider. 'Set the secret key for the DES algorithm. DES.Key() = ASCIIEncoding.ASCII.GetBytes(sKey) 'Set the initialization vector. DES.IV = ASCIIEncoding.ASCII.GetBytes(sKey) 'Create the file stream to read the encrypted file back. Dim fsread As New FileStream(sInputFilename, FileMode.Open, FileAccess.Read) 'Create the DES decryptor from the DES instance. Dim desdecrypt As ICryptoTransform = DES.CreateDecryptor() 'Create the crypto stream set to read and to do a DES decryption transform on incoming bytes. Dim cryptostreamDecr As New CryptoStream(fsread, desdecrypt, CryptoStreamMode.Read) 'Print out the contents of the decrypted file. Dim fsDecrypted As New StreamWriter(sOutputFilename) fsDecrypted.Write(New StreamReader(cryptostreamDecr).ReadToEnd) fsDecrypted.Flush() fsDecrypted.Close() fsread.Close() cryptostreamDecr.Close() End Sub End Module Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124422
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    - combobox find item by value Is there any way in a combobox to find the index of an item or set the item in a combobox by the value? I know there is a FindString, and a FindStringExact method in the combobox object, but is there anything simmilar or any work around to getting the index of an object or setting the selecteditem by the value? Any help is appreciated, thank you. Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124421
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    - Framework files location for compile On our development machines I created some batch file for compiling our web apps. They make use of some environment variables and batch files that visual studio installs. if "%VS80COMNTOOLS%"=="" goto error_no_VS80COMNTOOLS rem set path of aspnet_compiler for the framework in vs80 call "%VS80COMNTOOLS%vsvars32.bat" On my machine VS80COMNTOOLS=C:\Program Files\Microsoft Visual Studio 8\Common7\Tools\ vsvars32.bat sets a lot of environment stuff but, basically it puts into the path the location of aspnet_compiler and aspnet_regiis This is great because I don't have to hard code the path or worry about new paths if the framework gets upgraded. Unfortunately, I now need to compile on a computer which does not have VS installed. Thus no environment variables or vsvars32.bat file. Is their an automated way to get the most recent path to aspnet_compiler and aspnet_regiis? thanks, Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124419
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    - How do I Sleep for a specified amount of time and relinquish contr In the docs for Thread.Sleep() it appears unless I specify 0 my thread will still use the rest of its quanta (I guess doing nothing useful) as opposed to being suspended right away to allow other runable thread to execute. What's the best way to sleep for a specified amount of time and relinquish control right away as opposed to using up the rest of my quanta? Do I need to call the Win32 Sleep()? Do I need to call WaitOne() on a synchronization object? -- Thanks, Nick nicknospamdu@community.nospam remove "nospam" change community. to msn.com Tag: Samples of MemoryMappedFile in C# or .NET Tag: 124418

I am interested in a sample in C# (or any .NET) that shows the bare bones of
doing CreateFileMapping, et al. to share an existing file between two or
more processes on the same workstation. Any help would be greatly
appreciated.
Brian Hough

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Re: Samples of MemoryMappedFile in C# or .NET by Vadym

Vadym
Tue Nov 21 01:50:41 CST 2006

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YmxvZ3Nwb3QuY29t

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