watch if the file size change

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  - 1
    - Getting method name on compile time Hi, I would like the compiler (.Net 2.0/3.0) to embedd a method name in the code for me. For example, i would like to write: class MyClaa { public void MyMethod() { .... Logger.Log(*MethodName*, ex) ...... } } On compile time, i want the compiler to replace *MethodName* directive with the real method name: class MyClaa { public void MyMethod() { .... Logger.Log("MyMethod", ex) ...... } } Does someone know how to do it Thanks, Ido Tag: Visual C# General watch if the file size change Visual C#
  - 2
    - problem in starting windows service Hi, I have a windows service written in c#.The windows service would read the value from the registry key and do batch processing of files.when I start the service I get an message: Application has generated an exception that could not be handled. Process id=0x968(2408),Thread id =0xd48(3400) Click OK to terminate the application. Click CANCEL to debug the application. If I click OK,then I get an error message: Could not start the serice on the local computer. Error:1053 The service did not respond to the start or control request in a timely fashion. Please let me know how to fix this problem. Tag: Visual C# General watch if the file size change Visual C#
  - 3
    - ho to dissable the x little icon in a form u know that litle x to close a form. i wanna to disable it. I don t know why, but the teacher asked us to do that :) 2- have a had any reason to that in real business what d be a reason thanks Tag: Visual C# General watch if the file size change Visual C#
  - 4
    - how to encrypt string using enterprise library with md5 algorithm i have using Cryptography in Enterprise Library using Md5CryptoServiceProvider but the encrypt result is different with encrypt using System.Security.Cryptography using System.Security.Cryptography : pass = Cryptographer.CreateHash("MD5CryptoServiceProvider", pass); MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider(); UTF8Encoding encode = new UTF8Encoding(); byte [] t = md5.ComputeHash(encode.GetBytes("Admin")); string b = ""; foreach (byte a in t) { b += (char)a; } using Enterprise Library with MD5CryptoServiceProvider: string b = Cryptographer.CreateHash("PasswordHasher", "Admin"); how to encrypt string using enterprise library with md5 algorithm and why the result not same Tag: Visual C# General watch if the file size change Visual C#
  - 5
    - Why are Components always Marshalled byReference Why are Components always Marshalled byReference Tag: Visual C# General watch if the file size change Visual C#
  - 6
    - [Serializable] Attribute I want to know how compiler make a class Serializable if it has a [Serializable] attribute. If you look at SerilizableAttribute Class its just blank. [ AttributeUsage ( AttributeTargets . Delegate | AttributeTargets . Enum | AttributeTargets . Struct | AttributeTargets . Class , Inherited = false )] public sealed class SerializableAttribute : Attribute { // Methods public SerializableAttribute () { } } I want to know the detail process what is done by compiler so that it become seriliable class. Thanks Tag: Visual C# General watch if the file size change Visual C#
  - 7
    - Switch Case I want to add a swtich case for a simple grade marking window. I have experience in VB and for this I would type: Select case mark Case 0 to 34 txtgrade.text = "F" case 35 to 40 txtgrade.text = "E" //etc End Select. How can I do this: Case 0 to 34 in c# Lucy Tag: Visual C# General watch if the file size change Visual C#
  - 8
    - How to Create a URL syntax checker in C# I would like to create a URL syntax checker so that can verify a cerrtain URL not a phish site. But I am also aware that some URL have valid syntax but is still a phish site. To answer this, I am looking for some measures on how to verify a URL and its correct DNS equivalent. I am doing a project of mine as one of our requirements and I have decided to create a web browser (already done) and I have included there 3 anti-phish tools. One of the tools is to check for URL syntax error. i have searched for such but has given me no good results that can be of any help to my project. I was hoping that some of the bright minds here could help me or enlighten me in my search. Thanks. Tag: Visual C# General watch if the file size change Visual C#
  - 9
    - Visual Studio Crashes with error "encountered Problem" Hi people i have been struggling to find a solution to my problem with VS 2005. all my projects crash with the message "Visual studio encountered a problem and needs to close",the error report gives this information : AppName: denenv.exe AppVer:8.0.50727.42 ModName:msenv.dll ModVer:8.0.50727.42. Can somebody please help regards Tag: Visual C# General watch if the file size change Visual C#
  - 10
    - Confused about how default indexers property works Hi programmers I found this example which covers how default indexers work http://pietschsoft.com/Blog/Post.aspx PostID=1357 I can’t see how it works. At the very end of the article the author says: // Change the name of the first Person in the People // collection using the Club objects Default property club[0].Name = "John" ; But does the default property get called at all I out commented the Set method in public Person this [ int index] and it still works. But if I do the same with the Name property in the Person class I get compile error. This means that the default property (set) never gets called. Instead it is the property of the Person class that gets called( ) Im having the exact problem with my code, so I would be really glad if someone can sort this out for me. I saw another example which would equivalent with this call: club[0] = "John"; But in that example there were no Properties other than the default index property. I got compiler error when I removed the Set metohd: "Property or indexer XXXXXXX... cannot be assigned to - Its read only". Plz give explanation // Lennart Tag: Visual C# General watch if the file size change Visual C#
  - 11
    - Passing parameters Hi there is using ref the only was to pass a value to a method, changing the value and return the value back to the calling method with its new value Tag: Visual C# General watch if the file size change Visual C#
  - 12
    - Activator.CreateInstance Fails! Hi, I added a reference to a dll in my C# project. I try to create instance of a class which is stored inside this dll. I added "using MyDLL;" to the top of my code of course. I use Activator.CreateInstance(Type type) like this: object myInstance = Activator.CreateInstance(Type.GetType("MyDLL.MyClass")); Car car = object as Car; car.StartEngine(); but it fails with an ArgumentNullException because Type.GetType(string) returns a null value. The fullpath of the class that I want to create an instance of, is correct. I searched MSDN Help and found this topic: **************************************************************************************************************************** How to: Load and Unload Assemblies (C# Programming Guide) The assemblies referenced by your program will automatically be loaded at build time, but it is also possible to load specific assemblies into the current application domain at runtime. **************************************************************************************************************************** If MyDLL is loaded at build time why can't I create an instance of a class in this DLL Thanks for all suggestions and help. Tag: Visual C# General watch if the file size change Visual C#
  - 13
    - C# COM entry point function Hello everyone, I am a developer from C++ COM to C# COM. I feel confused about the entry point function for a C# COM object. In C++, we always initialize object through GetClassObject or DLLGetClassObject, but it seems C# does not need these functions Here is a sample from MSDN. http://msdn2.microsoft.com/en-us/library/aa645738(VS.71).aspx So, in C# do we need to implement the required functions like GetClassObject If no need, which function is the entry point for C# COM object -- I want to find the entry point function so that I can verify that my C# COM object can begin to talk with other COM clients. thanks in advance, George Tag: Visual C# General watch if the file size change Visual C#
  - 14
    - Debug vs Release Hello, I have a Windows Forms application written in C# via VS 2003. It does 100% of what it should while in Debug mode. However, there is one thing it does not do when compiled in Release mode. There is an external .dll I have to connect to, to do a screen scrape of an AS400 application. The linking of it is as follows: [DllImport("PCSHLL32.dll")] public static extern UInt32 hllapi(out UInt32 Func, StringBuilder sbData, out UInt32 Length, out UInt32 RetC); When I run in Debug mode it connects and gives me the correct return code of 0 which = Success. However, when I run in Release mode I get a different return code of 10 which is Unsupported. There is no code difference between modes. I have no #debug or anything onther than the exact code. The only thing I can figure is perhaps a security difference between Debug and Release modes. Is this the case Are there any other suggestions on how I can get this piece to work Thanks in advance, Kevin Tag: Visual C# General watch if the file size change Visual C#
  - 15
    - AppDomain creates confusion Can any please tell me difference between AppDomain and Process in .Net context. I mean I am reading a book which says AppDomain is the new boundry for application execution and we can have more than one AppDomain in a process. If my application (means exe) is executing in an AppDomain than what is a process in which I can create another appdomain means can execute another exe. The book(Professional C# 2005 Wrox pub) further says AppDomains cannot access object directly in another AppDomain without a proxy (proxy ) but the same book gives an example( that works) in which a AppDomain is created and constructor of a class in another assembly is called(through CreateInstance) it sounds consfusing. Please help or at least tell me proper forum to ask this question Tag: Visual C# General watch if the file size change Visual C#
  - 16
    - MAPI in C# ? I am currently sending email from my C# windows application using System.Net.Mail by creating a SmtpClient. However, I am being asked to use the Exchange Mail Server's "User names" instead of the actual email addresses. The SmtpClient method of sending mail does not seem to be able to do this. I am told that another developer working with another language and development environment can do this. I asked him how and he said he uses MAPI. Are there any built-in classes in DotNet for C# to use MAPI My goal is to pass the mail server the user names instead of the actual email addresses. Any help or direction is appreciated! Tag: Visual C# General watch if the file size change Visual C#
- Next
  - 1
    - Solution Explorer where did New Folder go? It appears that in visual Studio 2005, the new folder feature found in visual studio solution explorer has been replaced with "new filter". While I find filters fun and nice to use, I find this feature not able to do what I could with the new folder feature in 2003 We basically have a very large project and we want to create "sub-folders" off of that project as to group the different areas. An example would be something like... Toy Store Project Balls - In this "sub folder" is all the .cpp, .h, and resx files etc having to do with balls Video Games - in this "sub folder" is all the .cpp, .h, and resx files having to do with video games. Matchbox Cars - and finally in this sub folder would be all the .cpp, .h, and resx files having to do with matchbox cars. I realize I am using .cpp etc.... because I looked and didn't see a ide of c++ but figured it would be close to c#'s IDE. Does anyone else miss the sub folder feature Is there a switch or some method to turn it back on Still No feedback Surely someone has to know the answer for this Tag: Visual C# General watch if the file size change Visual C#
  - 2
    - Interface, Static Events?? OK, I know an interface can't contain static members of any kind, so let me explain what I am trying to do, and see if anyone has any ideas how to do it... I have several business objects in my app that all have a static "ObjectAction" event. This event gets fired when an object is added, edited, or deleted, and the eventargs contain the type of action that took place. Now, I have also built a ListBox<T> which will make a BusinessObject (T) specific listbox. The reason I have made the ObjectAction event static, is so that my listbox<T> can subscribe to it, and say add the business object to it's list when the event fires with e.Action == Added. Right now, I wrap ObjectListBox<T> to make my final control (i.e. CompanyListBox : ObjectListBox<Company>), and I can subscribe to the static events in each wrapped control. But what I would really like to do is create a IBusinessObject interface that defines the ObjectAction event in it, then have each of my business objects implements this interface. This way, I can move my event subscription to the gereric list box, rather than doing it for each wrapped one. Now that I have completely danced around that explanation....I want to end up with this... public class BusinessObject : IBusinessObject { // IBusinessObject member public static event BusinessObjectActionEventHandler Action; blah, blah, blah } public class ObjectListBox<T> : ListBox where T : IBusinessObject { public ObjectListBox() { T.Action += new BusinessObjectActionEventHandler(EventHandler); } } private EventHandler() { blah, blah } Does this make sense, and anyway to accomplish this TIA Tag: Visual C# General watch if the file size change Visual C#
  - 3
    - HELP Needed on COM Interop Hi All, Need help with COM Interop. I am trying to use interop and perform automation on a COM DLL. In the process, i need to type cast an Object into a Class specified in COM DLL. When i do the same in VB it works fine. However when i typecast using C# , i get the following exception. System.InvalidCastException: Unable to cast COM object of type 'System.__ComObject' to class type '<ClassName>'. COM components that enter the CLR and do not support IProvideClassInfo or that do not have any interop assembly registered will be wrapped in the __ComObject type. Instances of this type cannot be cast to any other class; however they can be cast to interfaces as long as the underlying COM component supports QueryInterface calls for the IID of the interface. i get the same exception when i try to typecast to the interface. Surprisingly, since i donot need to typecast in VB explicity, i am able to typecast. Can you please help me nail this. Am i doing something wrong Regards, Swaroop PS: am trying to perfrom automation of a COM Dll that comes with a tool called Extensis Portfolio. Tag: Visual C# General watch if the file size change Visual C#
  - 4
    - events and handlers I have what may seem like a silly question, but hopefully someone can let me know. If I have 3 objects, which I will call A1, A2 and A3, that all reference each other (I have a data model that is effectively a graph structure that I am modeling) and each attach to an event on a different type of object, which I will call X, so that when something happens they can all react accordingly. My question is as follows. 1 The event fires on object X 2 The handler on A1 responds to the event as a result it causes all references to A2 and A3 to be removed, effectively deleting the 2 objects. 3. What happens now Does the invokation list of the event on object X realise that objects A2 and A3 have gone and not try and invoke them or does the fact that it has a refence to the handler mean the objects persist or will it try an invoke something on an object that may have been garbaged collected Alternatively... Am I using events where I shouldn't be Is there a way to unhook events that I am missing Cheers Tom Tag: Visual C# General watch if the file size change Visual C#
  - 5
    - Help - command line error MIDL1003 Hi, can anyone help me, i am trying to create MSHtmHstInterop.dll but im getting this error and i dont know what it means or how to fix it c:\program files\microsoft sdks\windows\v6.0\bin\xmldom.idl(22) : fatal error C1 034: idispids.h: no include path set midl : command line error MIDL1003 : error returned by the C preprocessor (2) Tag: Visual C# General watch if the file size change Visual C#
  - 6
    - How do I transfer data to an Excel file Happy New Year to all our readers! Hi everyone, I have a need to write data to an Excel file. I found a KB file, 306023, which gives a lot of information and an example that works. I now want to add some of this code to a DLL that I am building. However, having added all the recommended References, I still get errors. Typically, public Excel .Application m_objExcel = null ; gives an error: 1 The type name 'Application' does not exist in the type 'AnnsonDll.Excel' . I don't understand why I get the error here, but not in the example code. I have searched the web, but I can find no useful information on any of this. The KB file refers to using Excel = Microsoft.Office.Interop.Excel; but this isn't recognised by my version of C#. The nearest I can get is using Excel = Microsoft.Office.Core; I am using Microsoft Visual Studio 2005 Version 8.0.50727.42 (RTM.050727-4200) Microsoft .NET Framework Version 2.0.50727 Installed Edition: Standard Microsoft Visual C# 2005 77633-233-0110651-41645 Microsoft Visual C# 2005 Does nayone out there have any idea what I am missing Any help will be really welcome! Thanks for your time John Tag: Visual C# General watch if the file size change Visual C#
  - 7
    - Warnings and classes Hi! I'm new here and i've begun to learn C#. I have Microsoft Visual Studio 2005,and I think I found some bugs: 1. class Car { public int Year; } Why does this code create a warning (Field 'Car.Year' is never assigned to, and will always have its default value 0) Now this warning should be ONLY with unpublic fieds in structs and classes (written in MSDN - here's the link http://msdn2.microsoft.com/en-us/library/03b5270t(VS.80).aspx ) and Year is public! Is this a bug 2. When I compile code and having warnings, so when I hit the 'build' button again they just disappear! Strange... Thank you very much for the help! Tag: Visual C# General watch if the file size change Visual C#
  - 8
    - Double or single? Hi all, I want to implement a math and vector3 class. But I can't decide which value type I should use for scalars. I know that the default math library in .net uses double right But one of my friends told me that some of these functions convert it from double to float and then double again inside the chip, which would be pointless to use double. So what should I use Thanks, Aw Tag: Visual C# General watch if the file size change Visual C#
  - 9
    - Text file symbols I have an app that opens a text file, but i can't see the accents, instead i see something like this: cu l es l the problem is by reading the file or a property in the textbox where is displayed Tag: Visual C# General watch if the file size change Visual C#
  - 10
    - Problem showing int from another class Hello, I am developing a console text game. Here is the problematic code for it. Code Snippet using System; namespace CoolGameTextClean { class Engine { private static Player MainCharacter = new Player(); public Engine() { MainCharacter.StartingLevel(); } public static void Main() { Console.WriteLine(MainCharacter.DisplayLevel.ToString()); // Displays 0. It should display 1 Console.ReadLine(); } } } Code Snippet namespace CoolGameTextClean { class Player { private int Level; public int DisplayLevel { get { return Level; } set { Level = value; } } public void StartingLevel() { Level = 1; } } } The problem is, in the Main method, I want to display the Level of the MainCharacter. In the constructer, I call the StartingLevel method, which sets the Level to 1, however, when I run the program, it displays the level as 0. What am I doing wrong Can someone tell me Thanks. Tag: Visual C# General watch if the file size change Visual C#
  - 11
    - Language suggestion: try using {} catch {} finally {} I would like to recommend adding a 'try using' statement. It would make code easier to read and would limit horizontal scrolling in cases of nested using statements. Also, it is easier to understand that the catch statement outside the using statement is fired only if the variable initialization fails. The alternative (wrapping a using statement in a try statement) leads to more ambiguous-looking code. Code Snippet try using (StreamReader Reader = File.OpenText(@"c:\test.txt")) { try using (StreamWriter Writer = File.CreateText(@"c:\filtered.txt")) { while (!Reader.EndOfStream) Writer.WriteLine(SomeFilterFunction(Reader.ReadLine())); } catch (Exception exc) { MessageBox.Show("There was an error creating the output file."); } } catch (Exception exc) { MessageBox.Show("There was an error opening the input file."); } vs. Code Snippet try { using (StreamReader Reader = File.OpenText(@"c:\test.txt")) { try { using (StreamWriter Writer = File.CreateText(@"c:\filtered.txt")) { while (!Reader.EndOfStream) Writer.WriteLine(SomeFilterFunction(Reader.ReadLine())); } } catch (Exception exc) { MessageBox.Show("There was an error creating the output file."); } } } catch (Exception exc) { MessageBox.Show("There was an error opening the input file."); } Generally when dealing with File IO, particularly with XML documents or HTTP activities, I typically have 4 or 5 using statements nested inside of one another. To trap exceptions, that's ~8-10 tab's. This would cut that in half. Tag: Visual C# General watch if the file size change Visual C#
  - 12
    - Hashmap without unique key. Hello. Im trying to make a kind of object like the Hashmap with no unique key that I could loop trough it and get a string and the indexed string. Is actually two strings hash somthing like a datatable with two strings columns. The Dictionary class looked nice (Dictionary<string,string>) but it implements unique key too. Thanks Tag: Visual C# General watch if the file size change Visual C#
  - 13
    - Generic Method Return Type Casting Problem In the below code snippet, i am trying to retun a int type from a Generic Method Add, but getting a compiler error "Cannot convert type 'int' to 'T' " I have a scenario in my project to have such implementation. Would you give me your suggestion Do we have any workaround to implement this functionality public class GenericCalculator { public GenericCalculator() { } public T Add<T>(T t1, T t2) { if (t1 is int ) { object n1 = ( object )t1; object n2 = ( object )t2; int i = (( int ) n1) +( ( int ) n2); return i; } } } GenericCalculator c = new GenericCalculator (); c.Add< int >(10,20); Thanks, Senthil Tag: Visual C# General watch if the file size change Visual C#
  - 14
    - Helptext does not display all objects Say I'm typing 'using System.', I'm expecting to see 'MulticastDelegate' to be displayed from the IDE since the object exists. How come it's not then VS 2005 Pro Edition Tag: Visual C# General watch if the file size change Visual C#
  - 15
    - csc.exe /doc: flag error when generating documentation.xml Hello, I'm have a bit of an error when trying to output documentation xml from the command line using the /doc: output flag. I have a solution in 2005 with subproject. Some of the projects output the XML just fine, but other projects do not. The projects that do not output the XML report the following errors: Properties\AssemblyInfo.cs(33,12): error CS0579: Duplicate 'AssemblyFileVersion' attribute Properties\AssemblyInfo.cs(32,12): error CS0579: Duplicate 'AssemblyVersion' attribute Properties\AssemblyInfo.cs(23,12): error CS0579: Duplicate 'Guid' attribute Properties\AssemblyInfo.cs(20,12): error CS0579: Duplicate 'ComVisible' attribute Properties\AssemblyInfo.cs(15,12): error CS0579: Duplicate 'AssemblyCulture' attribute Properties\AssemblyInfo.cs(14,12): error CS0579: Duplicate 'AssemblyTrademark' attribute Properties\AssemblyInfo.cs(13,12): error CS0579: Duplicate 'AssemblyCopyright' attribute Properties\AssemblyInfo.cs(12,12): error CS0579: Duplicate 'AssemblyProduct' attribute Properties\AssemblyInfo.cs(11,12): error CS0579: Duplicate 'AssemblyCompany' attribute Properties\AssemblyInfo.cs(10,12): error CS0579: Duplicate 'AssemblyConfiguration' attribute Properties\AssemblyInfo.cs(9,12): error CS0579: Duplicate 'AssemblyDescription' attribute Properties\AssemblyInfo.cs(8,12): error CS0579: Duplicate 'AssemblyTitle' attribute I'm wonderring if this has something to do with a configuration setting or how the project was added to the solution... Please help, L Tag: Visual C# General watch if the file size change Visual C#
  - 16
    - Serial Port Hi there, I am new in using C#. I want to make an GUI which will open a serial port and will send data to a device. I tried out many techiques, but nothing seems to happen. The serial device is working properly, I've tested it in the HyperTerminal. I am using the following code: using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.IO.Ports; namespace SerialPort_test { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void btnConnect_Click(object sender, EventArgs e) { string LED = "L0 1"; // Turns on device's LED SerialPort SerialPort1 = new SerialPort("COM 1", 9600,Parity.None, 8,StopBits.One); SerialPort1.Open(); SerialPort1.Write(LED); SerialPort1.Close(); } } } I am getting the message: "COM 1" Does not exitst. What seems to be wrong I would really appreciate any help of you. Thank you in advance. Tag: Visual C# General watch if the file size change Visual C#

ashk1860

I need to create a watcher to rase a custom event if the size of the file changed. but I don't know the most efficient way to watch. the only way that I can imagin is to use a timer to check in a time period!!!!

thank you in advance

regards

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Re: Visual C# General watch if the file size change

Karthikeya Pavan Kumar .B

You can check this Watching a File in C#

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Re: Visual C# General watch if the file size change

Matthew Watson

You can use a FileSystemWatcher to raise an event when the size of a file has changed. See FileSystemWatcher.NotifyFilter for the setting to use.

Beware! FileSystemWatcher raises the event on a separate thread, so you can't directly access any UI Controls from the event handler code. You'd have to use form.BeginInvoke() or form.Invoke() to transition to the UI thread.

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Re: Visual C# General watch if the file size change

ashk1860

thank you for your swift and helpful answers

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