Migration to 2005

Visual C# General

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  - 1
    - May I use FieldAccessException for own purpose ? Ther are more than just those two that you can use -- some that I've used are FormatException (when implementing custom parsing) and InvalidOperationException (when the state of the object was invalid -- say you were trying to close a connection that wasn't open). And there's no reason to derive from ApplicationException and not from Exception -- parts of the .NET framework actually throw ApplicationExceptions, so it's pretty much worthless. Tag: Visual C# General Migration to 2005 Visual C#
  - 2
    - Running a C# Application Outside Windows Operating Systems - Is there a way? I don't quite understand everything (you were clear, but I'd rather have it S-P-E-L-L-E-D out to me (not like that) than go wrong and kill all my machines). I DID understand the Xenocode business, but what got my attention was: Quote A slightly sneakier and easier way to go about this would be to create a boot disk that runs solely in memory, and put your program on it. I'm not sure how you would go about doing this in windows (although I'm sure there is some commercial solution you could find) but it isn't all that hard to do in linux. If you could elaborate on that mainly, I'd be extremely pleased, but if I'm still in murky waters, I'll follow all your advice, word-for-word. Thank-you, I do hope I'm not being a nuicense. Tag: Visual C# General Migration to 2005 Visual C#
  - 3
    - RTF to PDF convertion using C# Just right click on you project in Solution Explorer------->Add Reference-------Select COM tab-----Select 'Acrobat' Regards, Zafar Iqbal Tag: Visual C# General Migration to 2005 Visual C#
  - 4
    - confused in populating array! thanx for both of your hellp! i understand arrays so much more better thanx! and peter thanx for the new info! didnt know bout that! thanx anonymoussssaaaaaaaaaahhhhh Tag: Visual C# General Migration to 2005 Visual C#
  - 5
    - Passing a string from a C++ DLL Nevermind, I figured it out. The trick is to use StringBuilder. More information can be found here . Tag: Visual C# General Migration to 2005 Visual C#
  - 6
    - Programming the parallel port help!!! Hello: I'm looking for projects about programming the parallel port. I found an excellent article at CodeProject.com about leds titled " I/O Ports Uncensored - 1 - Controlling LEDs (Light Emiting Diodes) with Parallel Port" ( http://www.codeproject.com/csharp/csppleds.asp ). It’s very useful because I’m studying Computer Architecture in my University. But now, I want to see another projects. I found on Internet projects based on C, but I want projects based on .NET. Can you help me Thanks. Tag: Visual C# General Migration to 2005 Visual C#
  - 7
    - how to call contructor of base class from constructor of inherit class hi, thank you both. the reason i am doing a constructor that takes parameters and not defining a zero parameter constructor is precisely because there is a value in the object that should not be left undefined. i will try the syntaxis defined above Tag: Visual C# General Migration to 2005 Visual C#
  - 8
    - Equals Method If you're type is mutable (e.g. data members can change after construction), I would just overload operator==. If you're planning on supporting adding instances of your class to sorted collections, you'll likely need to overide Equals, GetHashCode, and possibly implement IComparable. Normally you want to override Equals when you overload operator==; but it's up to how you're expecting it to be used. With classes the base Equals compares references, not value. With structs the base Equals compares value, so you don't "need" to override Equals; but it's usually faster if you do. Tag: Visual C# General Migration to 2005 Visual C#
  - 9
    - How can I recover a lost vshost.exe.manifest file Somehow (the problem occured right after doing my first "deploy") I have lost the vshost.exe.manifest to my project. That keeps me from rebuilding the application. Is there a way that I can recreate that file (I have searched for the file on my hard drive, including recycle bin and it is not present.) Tag: Visual C# General Migration to 2005 Visual C#
  - 10
    - PropertyGrid Cloning objects The appropiate msdn forum would be: Windows Forms Designer Here is my issue: http://forums.microsoft.com/MSDN/ShowPost.aspx PostID=1208317&SiteID=1 Tag: Visual C# General Migration to 2005 Visual C#
  - 11
    - Type Reference and Object Name MyClass is a type and therefore doesn't take up any memory (ignoring the actual type definition held by .NET). Maybe thinking about it this way will be more clear. Suppose you call new on a type (creating an instance of the type). Somewhere in memory it is allocated and the address is passed back to you (assume it is 0x12345678). Now, every place in your code where you want to refer to this instance. You have to do this: 0x12345678.SomeMethod(); 0x12345678.SomeProperty = 10; Not only does this require quite a bit of typing but it also requires that each time an instance is created you modify your code. Definitely not good. Therefore you introduce a symbolic name called var that will, at runtime, represent the instance in memory. So instead of the above code you write: var.SomeMethod(); var.SomeProperty = 10; Now it doesn't really matter where the instance was physically located in memory because you always represent it symbolically through var . var contains (and therefore is a pointer to) the instance in memory. The variable itself (in this case) has its own memory address but that address is on the stack because it is a local variable. So if you looked at the stack you'd see a slot for the variable and in that memory slot you'd see the address for the actual instance that was allocated. --- I think you're confusing reference type terminology (which is easy to do). A reference type is any type that is not a value type. In C# a reference type is a class or an interface. If a variable is typed as a reference type then you would say that the variable is a reference type but what you actually mean is that variable is of a type that is a reference type (i.e. a class or interface). Therefore, in the example, var is a reference type because it is typed as IMyClass. The fact that it actually points to an instance of another reference type ( MyClass ) is all but irrelevant. When you get into OOP you'll see this termed as polymorphism. var , as far as the compiler is concerned, is limited to the members exposed by IMyClass however it points (in memory) to an instance of the MyClass type. Again, that information is all but irrelevant. You can typecast var back to the original type but you'd have to know at compile time that that was the case. So in answer to the question var contains a pointer to the MyClass instance that was allocated in memory. -- IMyClass var is exactly a variable declaration. No more, no less. In my original post I broke out the variable declaration and the instantiation of the object to demonstrate that they are actually two separate statements that can be conveniently combined together. As far as a diagram goes I can't do it through the forum but you can envision it this way. Draw a rectangle that is several lines long but not too wide. Label this the stack (which is just an array). Local variables and parameters are placed in this fixed block of memory. Each one gets its own slot in the array. Now pick one of the slots and label it var. This represents the local variable in memory. This particular value is of type IMyClass so whenever you use this particular value you are limited to the members exposed by IMyClass . This is effectively what happens with the variable declaration statement. Now draw somewhere else on the page a square and label it MyClass instance. This is an unnamed variable (at this point). Pick an arbitrary number to represent the actual address in memory where the object was allocated. This particular value (address) is of type MyClass . Therefore whenever this particular value (address) is used you are limited to the members exposed by MyClass . Finally go back to the stack and assign the # that you specified in the square to the var slot on the stack. This is pretty much how it works. Whenever you reference the var variable the CLR silently redirects to the address stored in the variable. So when you call var.SomeMethod() it is silently getting the address from the local variable, going out into memory to the actual instance and then calling the method on the object. -- In general most OOP languages work the same way. The only real difference is the syntax. Polymorphism, in all languages, allows you to create an instance of one type but then treat it as a different type (provided there is some inheritance involved). This provides the ability to change the behavior of objects at runtime without actually requiring that the type actually be available at compile-time. It provides a level of isolation (or indirection) to make maintenance a lot easier. Inheritance works the same way in all OOP languages as well. The only real addition in .NET is interfaces. With interfaces a type can implement an interface. In reality we say the type implements the interface but it works just like inheritance otherwise so polymorphism and overloading work properly. Even though C# and C++ are different languages C# is syntactically similar to C++ so a good OOP book on C++ might provide a good starting point. You can skip the gory details of multiple inheritance and abstract/virtual base classes and still come away with a good understanding of OOP that also applies to C# and .NET. Michael Taylor - 4/19/07 http://p3net.mvps.org Tag: Visual C# General Migration to 2005 Visual C#
  - 12
    - is my code leaking memory? The Thread class should have a Dispose() method but doesn't have one. It will leak 4 handles that do not get released until the garbage collector runs. If it never runs, or doesn't run frequently enough, you'll leak unmanaged resources badly. Use ThreadPool.QueueUserWorkItem() to avoid this. In your specific example, there isn't a good reason to create a new thread over and over again. Just use one that runs a loop on a ManualResetEvent. Tag: Visual C# General Migration to 2005 Visual C#
  - 13
    - XmlReader and deep copy You'll have to know how the original XmlReader object was created (via URI, Stream, etc.) and create a new one in the same way. Tag: Visual C# General Migration to 2005 Visual C#
  - 14
    - Casting parent class to child viperjason wrote: Got a better answer that doesn't require me to change tons of my code. Please share. Tag: Visual C# General Migration to 2005 Visual C#
  - 15
    - Show Desktop How can I bring the Desktop to the top, like pressing [Windows]+[D ] Important : the way of minimizing all windows by calling ShowWindow ( p .MainWindowHandle, SW_MINIMIZE) for each process p returned by Process.GetProcess() doesn't solve my problem, but something like to minimize all windows listed in systray would. Tag: Visual C# General Migration to 2005 Visual C#
  - 16
    - Using C++ SDK in C#? I have a set of cameras that I need to write a program to operate and the manufacturer provides an SDK in C++. However, the system I need to interface with is all being written in C# and I need to know if there will be a problem running those function (I assume there will be) Tag: Visual C# General Migration to 2005 Visual C#
- Next
  - 1
    - storing values between two forms Hi, IS there away to store values between forms, without using Viewstate, sessions, or cookies, //A class: public class BaseClass : System.Web.UI.Page { private string test = ""; public string A { get { return test;} set { test= value ;} } } my first webform1.aspx private void bt_c_Click( object sender, System.EventArgs e) { BaseClass bc = new BaseClass(); bc.A = "hello world"; Response.Redirect("WebForm2.aspx"); } after it redircts to webform2.aspx and when I try to print the value: The value is blank, why is that BaseClass bc = new BaseClass(); Response.Write("-------<BR>"+bc.A); Thank you, Tag: Visual C# General Migration to 2005 Visual C#
  - 2
    - Cannot Open Image file from Console Application (C#) I wouldn't understand why. Are you sure the path is correct to the image If it werent, then the Process would throw an error about not being able to find the file. Tag: Visual C# General Migration to 2005 Visual C#
  - 3
    - report logging my suggestion, if you can, move to a database. It's what its designed for, for things such as this. :-) Tag: Visual C# General Migration to 2005 Visual C#
  - 4
    - Environment.SpecialFolder.MyDocuments in C#1.1 hi, Environment .GetFolderPath( Environment . SpecialFolder .MyDocuments) ; how to achieve the same in framwork 1.1. Environment does not have SpecialFolder in vs2003 ;-( thanks Tag: Visual C# General Migration to 2005 Visual C#
  - 5
    - I would like to ask about Face Detection Try System.Drawing.Graphics.Face.Detect static method. Tag: Visual C# General Migration to 2005 Visual C#
  - 6
    - C# Newbie - Problem with syntax? Compiler: Visual C# 2005 Express I am tring to see if a file exists and if it does delete it. To see if the file exists I am using: bool exists; exists = Syste.IO.File.Exists(@"c:\test.txt"); To delete the file I am using: System.IO.File.Delete(@"c:\test.txt"); The test file is located in c:\ and is called test.txt however, exists always returns false and the file is never deleted. What am i doing wrong What is the purpose of the @ symbol before the file name thanks Tag: Visual C# General Migration to 2005 Visual C#
  - 7
    - myprocess.Start() is not working for me in .net 2003 weird, I can't even execute: System.Diagnostics.Process.Start("Notepad.exe"); And i can t debug, it says i have no permission to debug Tag: Visual C# General Migration to 2005 Visual C#
  - 8
    - only view select text in textbox Thanx guys thats exactly what i wanted, spot on Anonymousaaaaaaaaaaaaaaaaaahhhh Tag: Visual C# General Migration to 2005 Visual C#
  - 9
    - Dialogs Cause Program to Freeze My program's main method has [STAThread] next to it. Also, there is some multi-threading in my program. The program is an OpenGL worldbuilder. It's a lab assignment for a class and the instructor provided a camera class that he said was multi-threaded. I don't really know much about how it's written. Tag: Visual C# General Migration to 2005 Visual C#
  - 10
    - Problems with Intellisense popup behavior My intellisense will appear for a second and then disappear. It does not give me time to scroll or select anything. This behavior is not consistent. Is there a timing or environment setting for intellisense How does it determine how long it stays visible Thanks, Tag: Visual C# General Migration to 2005 Visual C#
  - 11
    - 2 simple questions if you're using WPF, fonts can be put in.. http://msdn2.microsoft.com/en-us/library/ms753303.aspx Tag: Visual C# General Migration to 2005 Visual C#
  - 12
    - How to use string.replace to replace "\\" with "\" in a string? sorry, but the problem is still there. I need pass this string to a sql query paramater. But it still gives errors due to the two "\\". what is happening I know in text visializer, its "/", but in the runtime of the program, its still "\" I am going crazy now..help Tag: Visual C# General Migration to 2005 Visual C#
  - 13
    - Visual Studio Set References Copy Local to True Hi, I have a solution which contains many dll and exe. I set the Copy Local properties to each of References of all projects (it depends, some must be true, and some must be false). I build and save the solution, everything is in the right place. The csproj files seem to be good with <Private>False</Private> or <Private>True</Private> in every section. If I close VS and re-open my solution, all References are set to true, despite the value of the csproj. I don't understand what happens, and this is very unconvenient, because I have to re-set Copy Local in each Reference manually. My collegue, who works on the same VSS base, don't have the problem. I have not VS SP1 installed, but I have not seen any improvment in that way. Thanks for any help or suggestion. Tag: Visual C# General Migration to 2005 Visual C#
  - 14
    - 2D Drawing Options I'm developing an app that can graph signals (audio, FFTs, etc). Right now I'm using GDI+ and the signal is represented as a series of lines in a GraphicsPath object. I usually draw the lines then fill the path with a gradient. I'm wondering if there are any other options for doing this in C#. I thought about managed DirectX, but it seems that is mostly geared towards 3D drawing. Anyone have suggestions about a better way to go. It's important for me to draw/redraw as quickly as possible. Thanks! Barry Tag: Visual C# General Migration to 2005 Visual C#
  - 15
    - % Operator yes. By the way, I think '%' operator is foudamental to any language. you be better consolidate your programming basis. Tag: Visual C# General Migration to 2005 Visual C#
  - 16
    - Unmanaged to managed code Hello All. ahmedilyas: Well, it just goes to show about "different strokes." For me, the brighter color was easier to read against the darker background. Are these colors easy to read private void Form1_VisibleChanged( object sender, EventArgs e) { if ( this .Visible) MessageBox .Show( "Visible" ); } For me, the standard color for types from the Code editor is too dark against the dark background of the code sample outline. That's what in the above snippet. If it is readable for everyone else, I'll just stick with it. Tag: Visual C# General Migration to 2005 Visual C#

HAMMERMAN

I am migrating to 2005, is there any easy way to get snippets over into 2005 from 2003 and is there any easy way to get the contents of the toolbox i.e. componets over to 2005

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Re: Visual C# General Migration to 2005

TaylorMichaelL

No and no. Snippets didn't exist in VS2003 so there is no upgrade path. The snippet format is pretty easy to figure out and there is a code snippet editor available online so you can copy-paste the snippet blocks you want to create.

The toolbox can't be migrated nor can any of the settings. However the toolbox allows you to add new controls easily by using a simple browser-style dialog where you can select the controls to add to a new or existing tab. Any third-party components you rely on should automatically add themselves to the toolbox.

Your other settings you'll have to migrate by hand. Once you get everything configured the way you want be sure to export the settings to a new file so you can store it off and reuse it either on another machine or at the odd occasion where VS loses them. A great feature over prior versions.

Michael Taylor - 10/21/07

http://p3net.mvps.org

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