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- Previous
  - 1
    - regarding .net framework(urgent) hi sir/madam please send me material on following topics, this is very much urgent. this should be in introductory format.. 1) Introduction to .NET Framework 2) Concept of CLR 3) Managed & Unmanaged code in VC++ 4) Concept of Assemblies.. i will be very thankful to u for this, if send me as early as possible.. thanks regards shaveta datta Tag: About SetLocalSymInfo Tag: 60460
  - 2
    - Date and Time Properties dialog Hi, Does anyone know how to programmatically (C#) bring up Date and Time Properties dialog, the same one that comes up when you click on the little time indicator in the task bar. Thanks in advance Tag: About SetLocalSymInfo Tag: 60454
  - 3
    - UUEncoding in .NET Hi, I'm looking for an in-the-box or free-source solution to UUdecoding (and optionally UUencoding) data. I know that the Framework comes with Base64 encode/decode. I've also tried reflecting over System.Web.Mail as that allows attachements to be UUEncoded, but i stopped along that route when it called down to cdonts/COM. I'm just basically looking for the source that demonstrates how to UUDecode (or even just a firm description of the decoding principals and I'll do it myself!). Cheers, Steve Tag: About SetLocalSymInfo Tag: 60448
  - 4
    - Equivalent to QueueUserAPC? Is it possible to use the thread queues in .Net, e.g. using C#? The Windows API call for this would be QueueUserAPCEx. I've already found that there is the possiblity to use QueueUserWorkItem on a thread pool, but that's not exactly what I'm looking for. Tag: About SetLocalSymInfo Tag: 60446
  - 5
    - .NET Framework 1.1 wont install on 2000 Pro machine It prompts me that the Windows Installer needs updated but when I try to install the 2.0 instmsiW.exe for 2000 it says specified service already exists. How the hell do I get the .NET Framework installed? Thanks Tag: About SetLocalSymInfo Tag: 60444
  - 6
    - Max number of threads that can wait on a ManualResetEvent... Is there an API call I can use to determine the max number of threads that can wait on one ManualResetEvent? Like, on a single processor machine, the number is 64. I think a dualie can have up to 128. Tag: About SetLocalSymInfo Tag: 60443
  - 7
    - updater application block I felt I had to share this frustrating experience. I recently downloaded and installed the Updater Application Block (http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnbda/html /updater.asp?_r=1). Being a preacher of "RTFM", I read the ReadMe file that was installed. It said I needed to install the Quickstarts, and that a script was provided for it. It also said: " * The install script may take several minutes to complete, during which multiple windows appear and disappear; please just wait for the "install completed" dialog to appear." Ok, I'll wait. The windows came and left, and I thought everything was fine until I got an error complaining that a file was missing instead of the dialog that said "install completed". After a few hours of troubleshooting, I discovered that the missing file should have been generated by the DOS windows that were flying by. And in the install script, I saw this: ============ function GetVSPath() 'as string 'Assume VS is in the Program Files folder ('Added by Graeme May 30th) Dim oShell, oSystem Set oShell = CreateObject( PROGID_SHELL ) Set oSystem = oShell.Environment("PROCESS") GetVSPath = oSystem("PROGRAMFILES") & "\Microsoft Visual Studio .NET 2003\Common7\IDE" end function ============ Yep, that would be a problem. I had installed VS on my E: drive. So the DOS windows that had come and gone didn't do what they were supposed to! I changed the last line of the function above to: GetVSPath = "E:\Program Files\Microsoft Visual Studio .NET 2003\Common7\IDE" and re-ran the script and then everything was happy. While I appreciate the work that went into the application updater, and the amount of work that it will save me, I still felt that it could have been better. After all, you know what they say about "ASSUME". I feel better now. MD Tag: About SetLocalSymInfo Tag: 60440
  - 8
    - CONTRACT EMPLOYMENT IN TORONTO, DB, .NET, DEVELOPMENT Web development agency in Toronto, Canada has an opening for 3 months contract: Senior DB / Web Developer - 3 Months Contract. The applicant must have 5+ years of experience in web and other application development, deep knowledge of Microsoft Technologies including architect and design of databases (MS SQL 2000), development using .NET (C#). Go here for more details and click on the position: http://www.visualeradesign.com/employment/employment.htm Thank you. Visualera Inc. www.visualeradesign.com Tag: About SetLocalSymInfo Tag: 60437
  - 9
    - CONTRACT EMPLOYMENT IN TORONTO, DB, .NET, DEVELOPMENT Web development agency in Toronto, Canada has an opening for 3 months contract: Senior DB / Web Developer - 3 Months Contract. The applicant must have 5+ years of experience in web and other application development, deep knowledge of Microsoft Technologies including architect and design of databases (MS SQL 2000), development using .NET (C#). Go here for more details and click on the position: http://www.visualeradesign.com/employment/employment.htm Thank you. Visualera Inc. www.visualeradesign.com Tag: About SetLocalSymInfo Tag: 60435
  - 10
    - installing .net framework w/no internet access I want to install the .net framework on a server with no internet access. dotnetfx.exe requires internet access Can the framework be installed from a client to the server or is there another selfcontained file that can be downloaded and copied to the server for installation. Thanks, RickN Tag: About SetLocalSymInfo Tag: 60433
  - 11
    - .NET Framework ....installation...deletion Disregard post of minutes ago since Windows now allowed deletion of the file. Tag: About SetLocalSymInfo Tag: 60425
  - 12
    - Object threading Hi, If I have an object taht has a method thats started as a tread and other methods that are called by other classes. WHat is the boundries? The methods called by other claseses are in one thread and the threadproc in another, so we must sync those objects taht are being shared between the called methods and the thread proc? Right? SO basically the object itself is sitting in the caller thread, yet the threadproc inside the object is in another. so its feet in both threads? Thanks Tag: About SetLocalSymInfo Tag: 60420
  - 13
    - VB 6 Deployment Batch File in VS.NET In VB6's deployment and package wizard it made a batch file that you could run to repackage your project. Can I do something like that in VB.NET? I have a solution that all it does is package up my 15 files into a nice MSI. Every time I update one of my projects or Dlls (the dlls are not in dotnet) I have to open up my solution and tell it to rebuild. Is there an easier way? Thanks in advance Chris Tag: About SetLocalSymInfo Tag: 60419
  - 14
    - Server.Transfer Issue. I am using ADO.Net to save data in SQL Server using Transaction Object. Method works perfectly fine when I tested that ( begin Transaction and Commit Transaction, all are working great). But As I added Server.Transfer (somefile.aspx) at the end of the method, every thing vanished from database. ( as I need to transfer it to some other page on the basis of result) I have also tried Response.Clear() before Server.Transfer( some file ) and I have also used Response.Buffer = True at page_load method. Anyone, Please help... -- Ather Ali Shaikh Software Engineer eIntelligence (Pvt.) Limited. Ph. (+92-21) 2434070, 2415929-30 email. ather.ali@eintelligencesoft.com web. www.eintelligencesoft.com Tag: About SetLocalSymInfo Tag: 60418
  - 15
    - Inconsistent behavior in Uri class (Equals vs. ==) We have found that the Equals method of the Uri class works as expected but that the "==" operator does not. For example, here's a little console application: using System; namespace UriEqualsBug { class Class1 { [STAThread] static void Main(string[] args) { Uri u1 = new Uri ("http://tom/foo.xml"); Uri u2 = new Uri ("http://tom/foo.xml"); Console.WriteLine("The two instances are equal using the equals method {0}", u1.Equals(u2)); Console.WriteLine("The two instances are equal using the == operator {0}", u1 == u2); } } } One would expect the output to be true for both comparisons. However, we get true from the u1.Equals(u2) and false from u1 == u2. Any ideas? Is this a framework bug? We are using the .NET framework 1.1.4322. Tag: About SetLocalSymInfo Tag: 60415
  - 16
    - framework version Hi, I had vs.net 2002 installed and framework1.0, recently I installed framework1.1 into the same machine, can I configure to continue using vs.net 2002 build app on top of framework1.1, or switch back later? thanks, uni Tag: About SetLocalSymInfo Tag: 60414
  - 17
    - LDAP on a stand alone 2000 client I want to test out active directory authentication on a Windows 2000 client. Is this possible? If my client PC is called CLIENT and is in a workgroup WORKGROUP, do I use DirectoryEntry ("LDAP://DC=CLIENT,DC=WORKGROUP", "user1", "password") if user1 exists on CLIENT? Tag: About SetLocalSymInfo Tag: 60413
  - 18
    - ASP.NET Trace from service running in web app In the Application_OnStart event in global.asax, my code calls an AlertService which creates a System.Timers.Timer() object. So this service doesn't actually run in conjunction with a specific aspx page, apparently. When the timer's Elapsed event handler fires, it calls some other classes I have written. These classes output some Trace statements that you can view if an aspx page calls them, but I can't seem to figure out where the Trace statements go when my service calls the classes. Is there any way I can find the trace for this service? -- [[((hillarie))]] To reply, remove ".SPAMBLOCK" from email address Tag: About SetLocalSymInfo Tag: 60410
  - 19
    - ASP.NET: Page_Load fires twice I have a user control and its Page_Load event is firing twice. I have consulted articles such as this one: http://www.extremeexperts.com/Net/FAQ/PageLoadFiringTwice.aspx This article essentially says that if I set AutoEventWireUp to false, then the Page_Load will only fire once. However, that is not the right solution for me. Here is my code: in the .ascx.cs file: protected override void Page_Load(object sender, System.EventArgs e) { Trace.Write("GenInf01", "Page_Load() begin"); } private void InitializeComponent() { this.Load += new System.EventHandler(this.Page_Load); } in the .ascx file: Control Language="c#" AutoEventWireup="false" Codebehind="GenInf01.ascx.cs" Inherits="MERC.AircatWeb.Applications.TAR._107RequestForm.GenInf01" TargetSchema=http://schemas.microsoft.com/intellisense/ie5 Does anyone know what else to be looking for? -- [[((hillarie))]] To reply, remove ".SPAMBLOCK" from email address Tag: About SetLocalSymInfo Tag: 60407
  - 20
    - aspnet_isapi.dll 'Deadlock detected' Hello! I need help with this error, I receive it on the Event Viewer when my server has a lot of traffic for .net pages. I can't find any info about it. When this error happen my server hangs .net pages for 5 minutes approximately. Thanks in advance Event Type: Warning Event Source: W3SVC-WP Event Category: None Event ID: 2262 Date: 23/10/2003 Time: 15:29:45 User: N/A Computer: XXXXXXXXXXXXXX Description: ISAPI 'C:\WINNT\Microsoft.NET\Framework\v1.1.4322\aspnet_isapi.dll' reported itself as unhealthy for the following reason: 'Deadlock detected'. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. Tag: About SetLocalSymInfo Tag: 60404
  - 21
    - Security Exception Is there a way that when I install my vb.net application through an MSI that I can have the assemblies fully trusted? Everything works fine when tell it to trust my assembly but I need this to happen automatically when I deploy my app. Thanks. Chris Tag: About SetLocalSymInfo Tag: 60403
  - 22
    - C# late binding for accessing WORD object model I am attempting to use late binding to interface with word (versions 97, 2000 and 2002). I have a few questions: 1. How do I detect if there is an instance of word that I can attach to rather than starting a new instance. 2. How can I determine which version of Word is running. (I assume I need this as there may be instances where the arguments to methods change from version to version). 3. Does the MailMerge facility exist in Office 97. 4. Does anyone know of any C# samples that run on Word 97, 2000 and 2002. 5. Where can I get acces to the word object model for all of these versions of word. 6. Below is sample code that creates an instance of word and then opens a document. To access the Open method on the Documents, I have to somehow get a Type from an object. I achieve this by calling Type.GetHandle and then call Type.GetTypeFromHandle. My instinct was a GetTypeFromObject method but none exists. Is this the best way to do this as it seems very messy? Type t = Type.GetTypeFromProgID("Word.Application"); object w = Activator.CreateInstance(t); object docs = t.InvokeMember("Documents", BindingFlags.GetProperty, null, w, null); // Get a type from an object??????? RuntimeTypeHandle handle = Type.GetTypeHandle(docs); Type tDocs = Type.GetTypeFromHandle(handle); object doc = tDocs.InvokeMember("Open", BindingFlags.InvokeMethod, null, docs, new Object[] {@"C:\logfile.txt"}); Tag: About SetLocalSymInfo Tag: 60391
  - 23
    - help deleting a member of an enumeration from within a loop Hi, I'm very new to .NET and am programming in C#. I have a web application where i have two list boxes. Its kind of like a shopping card where you can add items from one 'locations' list box to the 'locations selected' (cart) listbox. I have a hirarchy of locations - main locations and sub locations. main locations being the parent locations, and the sub locations being the child locations. I want to be able to check to see if the already selected locations listbox (cart) already contains a child location of a parent location that is trying to be added to the collection (because there is no need to add the child there if the parent is selected). if so the child should be deleted and the parent added I am looping through the locations selected, and for each one looping through the already selected (cart) locations collection and checking the existance of the members. here is the code: private void Button1_Click(object sender, System.EventArgs e) { if(lstLocations.SelectedIndex != -1) { foreach(ListItem selectedLocation in lstLocations.Items) { if(selectedLocation.Selected) { bool itemAlreadyExists = false; bool parentItemExists = false; bool childItemExists = false; foreach(ListItem locationsSelected in lstCart.Items) { //does new location already exist in locations collection? if(selectedLocation.Text.Equals(locationsSelected.Text.ToString())) { itemAlreadyExists = true; lblNotice.Text += "At least one of the selected items already exists and has been ignored<br>"; } if(!itemAlreadyExists) { //does parent of child already exist in collection if(selectedLocation.Value.StartsWith(locationsSelected.Value.ToString()+"-") ) { parentItemExists = true; lblNotice.Text += "You attempted to add a child location of a parent already selected. There is no need to add a child location when the parent is already in your collection. Item ignored<br>"; } //does child of parent already exist in collection, if so get rid of it //this is the bit that is giving the error! if(locationsSelected.Value.StartsWith(selectedLocation.Value.ToString()+"-") ) { childItemExists = true; lstCart.Items.Remove(locationsSelected); //this is where the error occurs lstCart.Items.Add(selectedLocation); lblNotice.Text += "A child location was removed because you added its parent!<br>"; } } } if(!itemAlreadyExists && !parentItemExists && !childItemExists) { lstCart.Items.Add(selectedLocation); } } } } } when i execute the page and try add a parent location when a child already exists the page throws the following error: Collection was modified; enumeration operation may not execute. I know this is pretty much saying that as the loop progresses, the code tries to delete a member of the collection and hence modify the loop. Can you see what i am trying to achieve and please advise me of the best way around this problem? Thanks alot for your help Tim.. Tag: About SetLocalSymInfo Tag: 60389
  - 24
    - Reflection, custom attributes what may be the reason for the following behaviour: //I load an assembly from dll. Assembly asembly = Assembly.LoadFrom(dllFullPath); //then I get all Types from the assembly types = asembly.GetTypes(); flags = (BindingFlags.Public|BindingFlags.Static| BindingFlags.Instance|BindingFlags.DeclaredOnly); //and next, I try to load some method infos from type. foreach (type in types) { MethodInfo[] mInfos = type.GetMethods(flags); //and at the very end I try to get some custom attribues //defined for the method. attributes = mi.GetCustomAttributes(typeof ( Common.DescriptionAttribute),false); if(attributes.Length >0) { //do somethong with the attributes... } } The most strange thing for me is the fact, that when dllFullPath points to some deeply nested directory (with the project), the custom attributes are not found. But when I copy the _very same_ DLL to root directory of drive, all attributes are found. (?) What may be the reason for such behaviour ? Plese help Michal Januszczyk Tag: About SetLocalSymInfo Tag: 60387
  - 25
    - Plug-ins in the separate domain Hello, All! I try to realize the plug-ins loaded in the separate domain (approximately as here it is written http://msdn.microsoft.com/msdnmag/issues/03/10/plug-ins/default.aspx). A difference only that manager plug-ins is started not from the program, but from COM, written on vb.net which, in turn, is caused by a plug-in for the Host. In general, all wonderfully works, except for trifles: 1. Assembly of the manager of plug-ins and the classes necessary for work of plug-ins, it is necessary to prevent in GAC, else loading such as plugDomain.Load(ManagerAssemblyName) is not possible 2. There lives of 5 minutes on which expiration attempt to execute a method of a plug-in causes the message "Object has been disconnected or does not exist at the server". Thus of property (String) of a plug-in to receive it is possible. No my dancings around LifetimeServices and other leases give result :( With best regards, Dyakov K.M.. E-mail: kostya@galaktika.ru Tag: About SetLocalSymInfo Tag: 60386
- Next
  - 1
    - FxCop: How to write own rules for bracket checks ? Hi all, we use FxCop for coding rule testing. We want to have brackets in one line if statements cause this is not so error- prone Example: if ( 1 == 1 ) doSomething; <=> if ( 1 == 1 ) { doSomething; } Can we do such coding tests by FxCop? That is a inline code test. There are many tests like this to do for example tab tests or bracket tests in ifs if(.. if (... if ( ... Maybe we can do this by implementing our own IRule - but how to do? Thank you :-) Heike Tag: About SetLocalSymInfo Tag: 60379
  - 2
    - Remote Setup of Security. Is there a way to change the security of an assembly (such as CASPOL) that can be used accross a network from one machine to another ? With Thanks Jason Tag: About SetLocalSymInfo Tag: 60372
  - 3
    - Service Pack 2 Installation Problem I've repeatedly used the Windows Update page to download and install .NET service pack 2, but whenever I run the update, it tells me that service pack 2 needs to be installed. What's going on? Tag: About SetLocalSymInfo Tag: 60363
  - 4
    - Installing .NET Framework 1.1 I am running Win ME. Went to the Win ME update site and downloaded .NET Framework 1.1. Tried to install it, everything runs fine, and then I get to the script 'Registering System Enterprise <something>', and everything comes to a screeching halt. I get the following message: Error 1935: installation of assembly component {608A2065-C580-4C1F-91ED-87286B7FDE1F} HRESULT: -2146234299 Then the rollback script runs, and I get the message that nothing was installed. I have tried this over and over again, and the same thing happens. Couldn't find anything at the Microsoft site to help me, and thought one of you could. Thanks!! Tag: About SetLocalSymInfo Tag: 60355
  - 5
    - Isolated Storage hi, how to get the fullpath of created IsolatedStorage directory. -- gani Tag: About SetLocalSymInfo Tag: 60347
  - 6
    - New thread reference lost, can't abort I have a Main thread that starts a named thread, that inits and starts up events for watch a folder and monitoring a schedule. Later, I want to join the thread to the main thread and disable the events or if need be abort the thread. However, the named thread continues to run but loses it's name and main thread cannot abort it anymore. What's happening and how can I keep a reference to it? It seems to get lost after initializing. Thanks in Advance, Byron Tag: About SetLocalSymInfo Tag: 60345
  - 7
    - How do you get a list of the computers and domains on your network? How do you get a list of the computers and domains on your network? William Tag: About SetLocalSymInfo Tag: 60339
  - 8
    - web-hosting to be used with Microsoft.net would you pls. recommend me the web hosting to be used with Microsoft.net platform? Thanks Tag: About SetLocalSymInfo Tag: 60337
  - 9
    - ANN: October 2003 .NET Documentation Update October 2003 .NET Framework SDK Documentation Update: http://www.microsoft.com/downloads/details.aspx?FamilyID=2eaeb501-c197-4892-9c50-8f6be1b0d4e0 Download 48532 KB, English: http://download.microsoft.com/download/0/b/b/0bb757a0-e734-4e78-b95b-d357e2d8635a/NDP1.1-KB827821-X86-Enu.exe KB: http://support.microsoft.com/?kbid=827821 October 2003 Visual Studio .NET Documentation Update: http://www.microsoft.com/downloads/details.aspx?FamilyID=a3334aed-4803-4495-8817-c8637ae902dc (The 'MSDN Library for Visual Studio .NET 2003' must be present on your computer...) Download 80105 KB, English: http://download.microsoft.com/download/6/5/a/65adca14-5813-426b-9c86-169115ee0d24/MSDNVSsp1-KB827819-X86-Enu.exe KB: http://support.microsoft.com/?kbid=827819 IMPORTANT: This documentation update is also included in the MSDN Quarterly Library - October 2003 or later that is available to MSDN subscribers. If you already have one of these libraries present on your computer, you do not need to install this documentation update. -- Thomas Scheidegger - MVP .NET - 'NETMaster' http://www.cetus-links.org/oo_dotnet.html - http://dnetmaster.net/ Tag: About SetLocalSymInfo Tag: 60327
  - 10
    - App not working when moved to a new environment Hi, We have an ASP.NET application that works fine on my workstation and our integration server (both of these boxes have Visual Studio installed). When we moved the app to our stagging server (without VS) it stopped working. I get the following errors: Error #1: Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately. Compiler Error Message: BC30451: Name 'm_strOnLoad' is not declared. Error #2 Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NullReferenceException: Object reference not set to an instance of an object. Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Stack Trace: [NullReferenceException: Object reference not set to an instance of an object.] Customer_Service.searchAccount.Page_Load(Object sender, EventArgs e) System.Web.UI.Control.OnLoad(EventArgs e) +67 System.Web.UI.Control.LoadRecursive() +35 System.Web.UI.Page.ProcessRequestMain() +731 So it looks to me like the aspx pages cannot find a reference to their codebehind classes which should have been compiled into the project DLL. I have checked the versions of the all DLLs and aspx files in the bin directory and they are the same as the ones on the integration box. A little bit about the process we are using: First I develop and compile the project on my local box and then check the source files (.aspx.vb, .vb, etc) and aspx files into VSS. Then I go onto the integration server and checkout the pertinent versions of the source files and aspx files based on the code changes we want to implement. Still on the integration server, I recomiple the project DLL with the new files that I just got from VSS, and everything is working fine on that box. Now, for the move to the stagging server I simply copied all the aspx files, and I have the project DLL in the bin directory of the web application. Is this all I need to do? It seems that I'm missing something. Any help would be greatly appreciated! Tag: About SetLocalSymInfo Tag: 60318
  - 11
    - EventLog & EventLogEntries I've been using System.Diagnostic.EventLog & EventLogEntries for over a year and I still do not understand some aspects of how they are supposed to work. Here is one particular issue I have never made sense of: The EventLogEntries is the framework's only mechanism to fetch event logs. This can be done by fetching by index within this special collection class. This all seems simple and straightforward with one exception: the bounds and contents of this collection appear to change dynamically during the lifetime of this object. For example, I can fetch the Security log for a remote target and see in the EventLogEntries object that this log has 1000 entries that begin with record # 653617 and end with record # 653716. But while iterating the collection, I can find that suddenly the object has 980 entries and all entries have moved underneath me (e.g. record # 653716 was at index 999 and is now at index 979). I realize the underlying cause is that the event logs on the remote target are being pruned based on their configuration (e.g. based on the maximum log size). However, it is undecipherable to me how anyone could be expected to work a collection of entries whose contract with the caller appears to be that its size and contents can change at any time, for any reason and without any event notification. If someone can help me make sense of this, it would be appreciated. Tag: About SetLocalSymInfo Tag: 60317
  - 12
    - Tab control with Images/ colors on tabs. Is there any way I can change the background color of tabs (only) on the tabcontrols Are there any pretty tab controls. ? Mallikarjun Tag: About SetLocalSymInfo Tag: 60313
  - 13
    - .NET GC Woes & Best Practices To my fellow .NET developers, When .NET came out and I attended one of its launch seminars I was ecstatic about it's potential. I convinced my employer that his next enterprise-level application should be developed using the latest-and-greatest technology--.NET! Now that my application has reach fruition and we're in the deployment stage MAJOR issues are becoming apparent esp. dealing with memory leaks. I was under the impression that the Garbage Collector was a godsend--a magical force who would deal with all my memory management concerns so that I could be freed to work on the more important issues dealing with business logic. That assumption was far from true. Now before I elaborate, let me say this... I realize that every major undertaking in the programming world is bound to have its bugs. I myself have never produced anything beyond the simplest of applications that were without bugs. Therefore, I expect no perfection from the .NET designers and I still believe largely in .NET's potential and direction. It's just that I have been riddled with memory leaks that I never had in the VB6 world. Now that I have witnessed the power of GC, I'd rather regress to managing my own clean up. MY ISSUES WITH GARBAGE COLLECTION: 1. Whether or not Microsoft wants to admit it, the world of programming is so massive that most programmers cannot be expected to grasp all the high-level ins and outs necessary for developing superior apps. I though GC was designed with this in mind; however, as I read all the posts regarding it I can see that there is an overwhelming number of confused developers who are unsure about it. Back when I set my objects to Nothing once I finished using them, things were easy. 2. Hanging references are rampant. Say you create an object that contains other objects. When that object falls out of scope but has inner-objects that go on living, although you would expect it to die, it lives. One very common example of this arises when you create a form and assign event handlers to the various events, but do not remove those handlers when the form is closed. The dead form reference exists in limbo never to be reclaimed. From a simplistic standpoint, should GC be intelligent enough to dispose of all inner objects when the parent object reference falls out of scope? I mean, if it's obvious that I can never make reference to the closed form again and all the inner objects are ONLY referenced by the form itself--i.e. they are complete self-contained--why bother retaining it in memory!? 3. Because of .NET it is almost a requirement that developers purchase a memory profiling tool. If I hadn't I wouldn't have stood a chance at eliminating my memory leaks. At present, with the tool, I have only just begun plugging all the leaks. 4. As more and more .NET issues emerge for me, it would be nice to have a specific Microsoft URL that has a .NET priority list of issues. Knowing what MS was working on would help put me at ease and make me eagerly anticipate the next release. GARBAGE COLLECTION CONFUSIONS: Although GC was intended to make my life easier, I have had to do volumes of research that lead to tons of questions and some answers. Eventually, I decided that learning from the posters on these newsgroups had limited value--everyone kept speaking definitively on the topic only to be contradicted by someone else who was in turn contradicted again. Here are some of the questions I asked... It seems that there are several ways of cleaning up objects--use deconstructors, implement the IDispose interface and call Dispose (or use a using statement), set the object to null, and override the finalizer method. (I am still uncertain as to whether the finalizer and the deconstructor are one in the same.) Q1: What is the train of thought I should use to know how to properly clean up objects? Call Dispose if it exists, nullify it, or both? Q2: Should I bother nullifying an object that is about to fall out of scope or does GC clean up nullified objects and out-of-scope objects the same way? (I'm guessing "yes".) Q3: If I declare a type and instantiate an object against it is it important to nullify it before I reuse it to instantiate another object? private void Show2Dialogs() { MyForm frm = new MyForm(); //instance 1 frm.ShowDialog(); frm = null; frm = new MyForm(); //instance 2 frm.ShowDialog(); } vs. private void Show2Dialogs() { MyForm frm = new MyForm(); //instance 1 frm.ShowDialog(); frm = new MyForm(); //instance 2 -- is instance 1 garbage collected? frm.ShowDialog(); } Q4: How does the scope of the type impact this? What if the type is static or belongs to a static class? MyForm frm = null; private void Show2Dialogs() { frm = new MyForm(); //instance 1 frm.ShowDialog(); frm = null; frm = new MyForm(); //instance 2 frm.ShowDialog(); } vs. MyForm frm = null; private void Show2Dialogs() { frm = new MyForm(); //instance 1 frm.ShowDialog(); frm = new MyForm(); //instance 2 -- is instance 1 garbage collected frm.ShowDialog(); } Q5: What are the GC ramifications using unassigned object references directly? new ToolTip().SetToolTip(MyButton, "Click me to continue..."); (Tool tips are graphical objects. Is there a difference on doing the same with non-graphical objects?) new MyObject().DoSomething(); //obviously a static method might be better Q6: From a design standpoint when should I use Dispose or destructors/finalizers? Here's what I think I've learned... Dispose: Use ONLY when your class deals with unmanaged resources. Destructors: Avoid them as there is no way to be sure when the GC will call them. GC will handle the details for destroying an object's managed resources without your help. Q7: Even when I explicitly Dispose an object is it still a good idea to nullify it? I would guess "yes". The whole idea of checking at the top of every method to see whether the object has been disposed makes for ugly code and seems problematic--what if the programmer forgets to code the check to determine whether the object has been disposed before attempting to execute the method's code? By nullifying the object, this becomes a non-issue. Q8: Has anyone developed some general suggestions (perhaps a best practices checklist) on designing for GC? Q9: Any general suggestions (or a best practices checklist) for avoiding memory leaks? e.g. Always remove all event handlers in your disposed objects. Q10: Regarding removing all event handlers in non-form objects... do it in a Dispose method or in the deconstructor? Pros/cons of each? I read some recommendations that event handlers should be removed when a form is Disposed/Closed, yet in the Windows Form-generated code for such events as button clicks, there is no attempt to unregister the event handler. Why is that? Well, that's more than enough for now. I'm just baffled that this thing called Garbage Collection--which is supposed to ease our burden--has done nothing but increase our workload as developers. I am truly thankful for anyone who takes the time to offer any feedback. I've been troubleshooting my current project's memory issues for months (tons of hours!). I've even brought in an outside contractor to help with the issue. His advice helped and reduced the memory-leaks, but did not solve the issue. Mario T. Lanza Clarity Information Architecture, Inc. Tag: About SetLocalSymInfo Tag: 60312
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    - LDAP Provider Hi all, Does .Net framework have any support libraries for implementing LDAP provider? Thanks, Gil Shabat Tag: About SetLocalSymInfo Tag: 60306
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    - Use public/private keys to verify sending assembly Hello any crypto and remoting types ... can you lend an ear? I would like to enhance the security of an existing application. Currently, the client tier of the application makes remoting calls to the business tier. At the business tier, I want to verify that remoting call originated from an assembly that was signed using my company's private key. The middle tier will assembly will signed in the same way. Has anyone experience, or just a good idea for doing this? In the client, I do have the freedom to send what I want in the call context. Any help or thoughts are deeply appreciated! Tag: About SetLocalSymInfo Tag: 60305
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    - aximp of SHDocVW.dll problem Hi there, As mentioned in message "aximp of shdocvw.dll -> problem with ShellExecute" posted before, aximp creates two files: AxSHDocVW.dll SHDocVW.dll The second has the same name as the original dll, and that makes problems with internet explorer. The offered solution was disassembly the interops using the ildasm tool and recompile it using ilasm with new name. What I could not understand is how I change the refernce of the AxSHDocVW.dll to point to the new interop I created. I also tried using the /source option when importing the library and get a .cs file, but I could not find the refernce directive in the code, so I created an empty project, added the source code and referenced to the new assembly I created. Still the refernce remained the same (looked in the manifest button of ildasm). Help.... PPPPPLLLLEEEAAAASSEE..... Regards, Or Lavy Tag: About SetLocalSymInfo Tag: 60303
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    - .net framework compitabilties Is the .Net framework can run on any win98 OS? if I will develop with .NET and I have clients with win98, will it work? Thanks. Tal Tag: About SetLocalSymInfo Tag: 60296
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    - Queue resizing Hi, How can I monitor the regrowing and shrinking of the Queue type? I only have .Count visible as public. I need to be able to determine the dequeing rate or the intiial size of this as I would rather it "not" grow in size. Thanks Tag: About SetLocalSymInfo Tag: 60294
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    - String conversion problem (encoders) Hi to all, can anyone tells me what is the correct way from the framework to convert OEM characters to Ansi (and the opposite) ?? I mean, i am building an SMS infrastructure and one part of it is to send sms through the help of Nokia PC Connectivity SDK. The problem is that when the user enter Greek characters in a textbox, they reach as empty chars in the phone, so i have to convert them to Ansi (i guess) before sending them. I tried the code below (taken from online help) but it gives me "??? ?????" in a Greek string. I know i am doing something wrong with the encoders but i still cannot find it. Does anyone can help ?? Thanks a lot! Anthony Boudouvas Tag: About SetLocalSymInfo Tag: 60280
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    - Queue._size = 0 Hi, I notice in the debugger that the _size member of a Queue is 0 even tho its been initialised, is it always 0 on construction and not the default size? So on the first .Enqueue(object) it will then grow. Weird, why is the _array memeber set to 32 (also the same value as _ShrinkThreshold). So why is _size = 0 and what is _size for then if it isnt the size of the Queue._array ? Thanks. Tag: About SetLocalSymInfo Tag: 60264
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    - My Webservice works on Win2000 but not on Win2003 Hello I developed a WebService that works on a Win2000 server, but when I copies them to a new Win2003 server and test them with the windows explorer: url --> http:\\localhost\Webserv\Webserv.asmx it says page not found. (If i put a html page in the same directory it works) I think it has to do with the association between .asmx and some dll's. How can I configure this easely I have done the "Application Extension Mapping" for: .asmx, .asax, .cs, .csproj, .resx, .vsdisco to C:\WINDOWS\Microsoft.NET\Framework\v1.1.4322\aspnet_isapi.dll but it still doesn't work. Any ideas Torfinn Tag: About SetLocalSymInfo Tag: 60261
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    - Problem with DirectorySearcher Hi, i'm trying to connect to the Active Directory and perform searches using C# but i'm getting an error when dealing with DirectorySearcher class. Here is a piece of code: DirectoryEntry de = new DirectoryEntry ("LDAP://OU=MYOU,DC=MYDOMAIN,DC=local", "superuser", "password"); ### This works OK DirectorySearcher ds = new DirectorySearcher ("(&(objectCategory=person)(objectclass=user))"); ### OK again ds.searchRoot = de; ### Not OK -- retrieving "CS0122: 'System.DirectoryServices.DirectorySearcher.searchRoot' is inaccessible due to its protection level" when compiling. I searched in the class browser and the class DirectorySearcher is defined as 'public' as soon as all the properties themselves (.searchRoot included), so why this message? Thanks in advance. Tag: About SetLocalSymInfo Tag: 60260
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    - Putting a delayed sign assembly into my PC's GAC Hi, I don't know where's the best place to post my question. I hope it suits this group. I have created an assembly with a delay sign attribute set to true in the AssemblyInfo.cs. And the key file attribute points to a "snk" file contains only public key. After I compile the assembly, I set it to skip verification by using "sn.exe -Vr" tool. Doing so, I hoped my PC's GAC won't verify the assembly. But, apparently as I drag the assembly from its location to the GAC folder, there's a "install failed" error: "The check of the signature failed for assembly 'xxxxx.dll'." My questions are: can't I put my delayed sign assembly into GAC? If I can, how can I do it. If not, then how am I suppose to test the whole application with so many common assemblies with delayed signing? Thanks a lot, subi Tag: About SetLocalSymInfo Tag: 60259
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    - Problem with DirectorySearcher Hi, i'm trying to connect to the Active Directory and perform searches using C# but i'm getting an error when dealing with DirectorySearcher class. Here is a piece of code: DirectoryEntry de = new DirectoryEntry ("LDAP://OU=MYOU,DC=MYDOMAIN,DC=local", "superuser", "password"); ### This works OK DirectorySearcher ds = new DirectorySearcher ("(&(objectCategory=person)(objectclass=user))"); ### OK again ds.searchRoot = de; ### Not OK -- retrieving "CS0122: 'System.DirectoryServices.DirectorySearcher.filter' is inaccessible due to its protection level" when compiling. I searched in the class browser and the class DirectorySearcher is defined as 'public' as soon as all the properties themselves (.filter included), so why this message? Tag: About SetLocalSymInfo Tag: 60258
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    - tools to convert IL to c# code Are there any tools and techniques available for converting a Intermediate Language code to C# code Tag: About SetLocalSymInfo Tag: 60254

when I call SetLocalSymInfo in my code within a global function, it throw
System.NullReferenceException. why?

by the way, what is the mean of startOffset and endOffset, is it offset from
file begin in charactor, or from the method's begin.

thanks

xiaorun huang

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