How can I restrict string values being passed into my method to ˇ°Openˇ±, ˇ°Closeˇ±, ˇ°Highˇ± and ˇ°Lowˇ±
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Restricting parameter values?
Visual C# General
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- Start of week specific to culture Thanks... I've missed that :-[ Tag: Visual C# General Restricting parameter values? Visual C#
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- Two basic questions (windows services and file permissions [acls]) Hello everybody, I have two simple questions. One is related to windows services and the other to file permissions (how to manage file ACLs). I followed this step by step tutorial (http://aspalliance.com/1316_Working_with_Windows_Service_Using_Visual_Studio_2005) and was able to code a windows service and setup package. The problem is that i now need an extra service to to some extra tasks (more specifically, a "timer application" which sleeps for a given amount of time and then does a certain task [ie: remove temporary files]). From the template generated code i can see: static void Main() { ServiceBase[] ServicesToRun; // More than one user Service may run within the same process. To add // another service to this process, change the following line to // create a second service object. For example, // // ServicesToRun = new ServiceBase[] {new Service1(), new MySecondUserService()}; // ServicesToRun = new ServiceBase[] { new myservice() }; ServiceBase.Run(ServicesToRun); } The problem is that i've added a "new Windows Service item" to my project, coded it's "startup" methods, added it to the ServicesRun array and it still doesn't work [ServicesToRun = new ServiceBase[] { new myservice(), new service2() };]! I even tried changing the order to check if the problem is related to my code but only the first service at ServicesToRun() gets started. Just to be sure i'm launching a new Thread() when both services start so the code execution doesn't hang or delay the services startup. Any thoughts about this My second question is related to file ACLs. I need to change a file permission to only be owned (read, write, whatever) by Administrator and another given user. Could anybody provide me with some example code to do this Thanks! Luis Silva Tag: Visual C# General Restricting parameter values? Visual C#
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- Transient project reference problems in large solutions ... how to handle broken references in partial "work solutions"? Hi - We do the following: We have a project of about 20 people, with - at this time - about 180 VS 2005 csproj files. This is expected to grow to 300...400. Obviously, we do not use a "super solution" containing all these projects - we use msbuild for doing a complete build (it just builds all csprojs it finds), and developers work with small, "custom work solutions" containg just the projects they need. We have decided to keep ProjectReferences in all project files - this is great when including another project into a solution. Also, Resharper is happy when it sees all those references. However, when we open such solutions, about 70% of the time the references to projects NOT in the solution get yellow marks that they are broken. In maybe 30%, the projects are found happily (and ReSharper is also happy). We thought for some time that a rebuild of the partial solution fixes the references; then, that a complete rebuild of all projects helps; then, that waiting for some timeout helps (there were reports that "after lunch, all was fine"). But none of these magics works reliably. I also looked into forums, but found nothing (under "large solutions", "partial solutions", "broken project references" and the like). Is there any way to use project references with such stripped down solutions that works Thx!!!!!! Harald M. Muller Tag: Visual C# General Restricting parameter values? Visual C#
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- Thread.Sleep() & Application.DoEvents() Neither one is any good. Use a timer. Tag: Visual C# General Restricting parameter values? Visual C#
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- Question about Windows Services ?? I have been through your blog before, say if something is running as a service on Windows Terminal Services and that is also connecting to the database and other good stuff. What is the advantage over when client can use the same dll and call the database from there, rather than running as a service.This part is little confusing to me... Say Business layer and services are two different projects or they can be done in one....as my application lot of clients will be connecting to the service.... Tag: Visual C# General Restricting parameter values? Visual C#
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- OverflowException was Unhandled Ok ... 200 TeraBytes is quite much data Can you give an example value for countBytes as well ad 3) I know that's not what you need, but you could try it to see if it would work in case the main error lies in the value of size. What type of Stream is s FileStream NetworkStream To be honest I still think that BitConverter doesn't convert the data properly Tag: Visual C# General Restricting parameter values? Visual C#
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- Threading synchronization Don't know if this helps....I had a program that used to monitor incoming UDP socket for specific messages from multiple internal webservices on different servers. That program would have to dynamically create and push data to multiple tabs which would then route the data to into various controls upon the tab page. I found that by creating a timer and having the timer collect the data and do the creation of the tabs and subsequent data distribution processing was the most effective. Any callbacks or invokes would only push data onto queues which could be locked for thread safety and those queues would be emptied only by the timer data manager. That way only one process is responsible for pushing data towards the GUI, it was a centralized Flight Tower so to speak and that would kick off to an internal drum beat. Tag: Visual C# General Restricting parameter values? Visual C#
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- Abstraction Abstraction is concerned with hiding, or providing detail at a later date. An class that is abstracted is something where you provide an interface that must be implemented within the class, but that class itself contains no implementation itself. The difference between an abstract class and an interface is that the abstract methods could be implemented by a derived class as well as the base class providing some functionality, or implementation as well. An interface merely defines the contract the an implementation must adhere to, to be considered able to communicate using that interface. So a short example could be, and clearly this won't compile, but will give you some ideas and keywords to search on... public abstract class SomeClass { . . public abstract void SomeMethod . public void AnotherMethod() { Console.WriteLine("Hello.") } . } Then a derived class: public class SomeOtherClass : SomeClass() { // You have to provide the implementation here, as this is abstract... public void SomeOtherMethod() { Console.Writeline("Hello again."); } . // Note that you get AnotherMethod() for "free"... . } I hope this helps you, as the above is a pretty simplistic answer. If it doesn't make sense, shoot me another post, and I'll try again! Martin. Tag: Visual C# General Restricting parameter values? Visual C#
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- How to replace "\\" with "\" I need the startup directory to pass it to an external program as command line argument. I know I can split up application startup path along \\ with String.Split() and recombine the pieces with @"\" but I always expect something more - obvious and of course done by someone else earlier Here is the code, I don't think it would matter: Code Snippet Process p=new Process(); string dest=@"DestDir\xyz.txt"; ... p.Arguments=Application.StartUpDirectory+dest; p.Start() Tag: Visual C# General Restricting parameter values? Visual C#
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- Accessing rows/columns in MultiDimensional Arrays Since it is up to you to define the width of a multidimensional array, you can simply divide by that width. Tag: Visual C# General Restricting parameter values? Visual C#
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- How to convert Parameterized Delegate from C# to VB.Net? Just isolate enough code to demonstrate the issue and post it here. Tag: Visual C# General Restricting parameter values? Visual C#
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- C# still going strong? Well I'm definitely not a VB.NET basher...it is a great language with some advantages over c# (such as background compilation)...i'd encourage you to take a look at this excellent posting . Out of necessity I've worked quite a bit in both languages and despite the neverending debate I think one vs the other comes down to personal preference rather than one being clearly superior. Before .NET came on the scene is was largely Visual Basic vs C++ and the argument was somewhat less hazy. If you came from a VB background chances are you migrated into VB.NET. Due to the steep learning curve there were always more Visual Basic programmers than C++ programmers and so it stands to reason that the rationale behind seeing more VB.NET examples than C# ones comes down to the 'squeaky wheel gets the grease'. Personally I haven't seen a predominance of VB.NET over C#...if anything it has been the reverse. Case in point...most conferences I go to (the most recent was the Houston TechFest) the speakers ask at the beginning of the session whether the preference is for C# or VB.NET code samples and every single time it is more heavily weighted towards C#. Personally I use C# whenever possible because I think it helps enforce better practices whereas VB.NET tends to take a more lenient approach. Last but not least most contract opportunities are very upfront about things being written in C# because VB.NET has not quite, for whatever reason, shaken its misperception as a weaker language so it is more financially rewarding for me to focus on C#. The reality is that in the hands of a professional programmer...VB.NET or C# will produce the same high quality code...the perceived differences would more rightly be attributed to the skill of the person at the keyboard. Tag: Visual C# General Restricting parameter values? Visual C#
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- Array as a buffer in multithreading Hello! I have an array of MemoryStreams. The main thread is updating one element at a time and the other threads are iterating over the array and checking if they are free to read the elements. If a MemoryStream is locked in the array, they won't read it and continue to another MemoryStream in the array. How can I implement this scenario I'm using the array as a buffer, the threads are reading from it and sending data over network, that's why I can't allow the main thread do the work of reading and sending the data. I need to make the other threads recognize and not read the element that is being updated. Thank you Tag: Visual C# General Restricting parameter values? Visual C#
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- Completely Invisible/Hidden Application Still shows up in the task-manager, which was one of his pre-requisites. A Windows Service will only show in the Processes. Tag: Visual C# General Restricting parameter values? Visual C#
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- while loop error--need help Seems to me the big problem your having is that -1 can never appear. Read returns 0 when it reaches the end of the stream, not -1. As can be seen in the remarks section of MSDN http://msdn2.microsoft.com/en-us/library/system.io.filestream.read.aspx Have fun, -mwalts Tag: Visual C# General Restricting parameter values? Visual C#
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- Losing value after calling method for use with another Lets explain again. Focus on this piece of code first: if ((String.Compare(lastAlbumTitle, currentAlbumTitle,true) == 0) || (firstAlbum == 1)) { AddNewProduct(xl, row, host, fileExtWAV, " Album ", filePathSourceWAV, fileName, moveFile, sstore); //Album WAV } else { AddNewProduct(xl, row, host, fileExtWAV, " Track ", filePathSourceWAV, fileName, moveFile, sstore); //Track WAV } What's happening and where the probelm is: 1) The loop starts. Through first iteration of the Loop, this is called: AddNewProduct (xl, row, host, fileExtWAV, " Album ", filePathSourceWAV, fileName, moveFile, sstore); it goes through and creates the JAAAlbum object, populates it with some values, and does it's thing as you can see and finishes 2) Now we iterate through the loop to the 2nd Excel record, this time, it evaluates to the else in the if statement and runs this: AddNewProduct (xl, row, host, fileExtWAV, " Track ", filePathSourceWAV, fileName, moveFile, sstore); Ok, all I'm saying is that in that in the call to AddNewProduct(xl, row, host, fileExtWAV, " Track ", filePathSourceWAV, fileName, moveFile, sstore); the JAAlbum object is lost from #1 and it's values are lost including ProductID . So in other words I do not know why JAAProductID object is out of scope or is garbaged...I need it for my second call for the AddNewProduct for Track because I need to pass both the Track's ProductID and Album's ProductID to my AddNewProductRelationship_Album_Track method Tag: Visual C# General Restricting parameter values? Visual C#
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- How to return and use a value from one method call to another Hi, if you want to make the variables static then you just need to declar them static inside your class i.e. class X { private static int myValue; ... In regards to your compiler errors, "not all paths returns a value" means there is some way your code can execute that means you do not hit a "retux x" statement, your method returns a long, however inside the switch case for "track" you do not return any value, your code will then exit the switch statement but there is no return statement also, the function always has to return something. The unreachable code detected is telling you that you have some code that will never execute, probably because you have a return statement before some code i.e. public void Foo() { return; int i = 1 + 2; //this is unreachable and will never be executed. } Mark. Tag: Visual C# General Restricting parameter values? Visual C#
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- How do I Retrieve text from other programs? Here's something I found that lines up with what I expected you would have to do for a graphical window: drill down to the correct window handle and then either send it a WM_GETTEXT message or find some other way. WM_GETTEXT will work if it is a standard Windows control. >> Use the tool Spy++ (that came with MSVC) for you to learn about window hierarchies, and in particular the hierarchy relevant to the specific other application you're going to be working with. You must figure out, using Spy++, how you're going to "drill down" from the desktop through successive child windows until you get to the text box. Once you've figured out how, you'll have to code this "drilling" yourself, using FindWindow/FindWindowEx/GetWindow. If it's one of the standard text box controls, you'll be able to send a WM_GETTEXT (equivalently, GetWindowText()) to it. (I think you can at least... I think there aren't any cross-process problems with getting the window text). If it's a custom control that doesn't support this, then all bets are off, and there's no general solution. Tag: Visual C# General Restricting parameter values? Visual C#
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- cannot find dll Is the .dll located on the other computer Please provide the code with the directory referece. Adamus Tag: Visual C# General Restricting parameter values? Visual C#
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- Calendar I'm so rry, but I still fail to understand your problem. I'm from Uruguay, and if I was to make a calendar, CultureInfo.CurrentUICulture.DateTimeFormat.GetDayName(DayOfWeek.Friday) would return "Viernes"... and that's pretty much what I would want. Can you help me understand what the problem is Tag: Visual C# General Restricting parameter values? Visual C#
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- Rotating Two Dimensional Arrays sorry, but i do not follow what you mean Tag: Visual C# General Restricting parameter values? Visual C#
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- Still Active Though Log Off Hi, I need to make my application so that it won't closed when the windows Log Off. I did cancel form_closing event, but it makes the system can't Log Off. Why i need this ...............................Remote Log On. Is that possible using C# Thanks in advance Tag: Visual C# General Restricting parameter values? Visual C#
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- OnClientClick Priority? try change your code "<input type="submit">" to "<input type="button">". because if the button's type is submit, it will be submit the data when you click the button. and other feilds will be clear. Tag: Visual C# General Restricting parameter values? Visual C#
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- where to find static definitions I thought that when you marked a method and class as static that all the objects that the class and methods use have to also be static. Is this not the case Tag: Visual C# General Restricting parameter values? Visual C#
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- Math with datetime?? There is no "one" answer to this problem. It is all a matter of how you define "age". You haven't provided a rock solid definition of "age" (which, of course, needs to say what to do about the differences in the number of days per month). Tag: Visual C# General Restricting parameter values? Visual C#
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- Error code: 0xe0434f4d Default .Net security does not allow you to run .Net programs directly from a network share (this is a Good Thing). Normally, you have to copy a .Net program to a local drive before you can run it. However, in your case this looks like it is not possible. One way around it is to change the local machines security policy to allow .Net programs to run from a network drive. (From Control Panel|Administrative Tools -> .Net Framework 2.0 Configuration, and it's somewhere in there...) Tag: Visual C# General Restricting parameter values? Visual C#
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- app.config or settings.settings Application settings are stored in the app.config file. You'll find a section that contains each of your settings along with the type and default value. This allows the application at runtime to get access to the default settings available. If you define a setting as user scope then the setting will also be stored in the user's local config file (since they won't have write access to the app config). This probably only occurs when the user changes the setting (through your UI). Nevertheless the app.config holds the settings for the application plus the defaults for the user settings. Now settings.setting is a code file. If you open it up (the actual source file, double clicking will take you to the project's settings page) you'll find that it is nothing more than a class that exposes each of the settings from the config file as properties. This allows you to programmatically access the settings at runtime without having to interact with the configuration subsystem (which is how you access the app.config) file. You almost never should mess with the settings.setting file. It is dynamically generated each time you use the project property pages to add or edit a setting. You should also normally not muck with the app.config settings either as you might mess up the syntax. Instead you should use the project's property pages to add and edit settings. However if you wanted to, for example, copy the settings from one application to another you could open the app.config file and copy the section from one application to another. You would then need to open the project's property pages to force the IDE to generate/update the settings.setting file. Michael Taylor - 12/28/06 http://p3net.mvps.org Tag: Visual C# General Restricting parameter values? Visual C#
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- closing app probs ahmedilyas wrote: Perhaps your application is still doing something in the background Such as creating another thread which is still running and hasnt finished yet What does your application exactly do Are you sure your are not looking at the application .vshost instance in task manager whilst you are running an instance of VS with that solution loaded (some people do get confused) the aplication uses a while loop(BoolExit =! false) to check if a process is running. if the process exited the app will start the process again.(a restarter) If i click the stop Button (BoolExit = true) and the loop will break. Some of the user i got they dont click the stop button they only click the X button to exit. the while loop stays open and the app windows closes, and the process keeps restarting. Tag: Visual C# General Restricting parameter values? Visual C#
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- calling an executable from within running app I have been looking for a couple of days now and I suppose I am just looking in the wrong places. As I have recently started migrating my knowledge from that of C / C++ to C# so I still have much to learn; However I would be most grateful if someone could point me in the right direction. Have also performed multiple searches and perhaps I am just not succint enough in what I am typing to find that which I seek. While keeping in mind I am also just now learning to program within Windows most all previous experience within C / C++ has been within Linux / Unix and previous to that was all assembly and C/C++ within DOS years back. So, I have much to learn reiterated once more. I am looking for something within the C# language that would be equal to that of the C - ansi / posix function 'system("foobar.exe");' So that I can call an executable from within a running app. TYVM in advance Erin Ferguson-Stange Tag: Visual C# General Restricting parameter values? Visual C#
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- Best way to marshal an array of C style strings Yes. Another option is to split the field into seven different strings of length 30 if that's more conventient. You can also use a char[] instead of a string if you prefer. Tag: Visual C# General Restricting parameter values? Visual C#
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- How can I control already open IE windows? I ended up using SendKeys and creating a new instance of IE each time a user clicks on the button. Some helpful links I came across: http://msdn2.microsoft.com/en-us/library/66ahbe6y(vs.71).aspx http://www.webtropy.com/articles/InternetExplorer.asp Internet%20explorer Tag: Visual C# General Restricting parameter values? Visual C#
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- How to make a tabpage invisible from user? Help Thank you very much. Tag: Visual C# General Restricting parameter values? Visual C#
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Re: Visual C# General Restricting parameter values?
Mattias Sjogren
The easiest way is probably to define an enum type with those values, and validate in the method that one of the defined enum values was passed in.
Re: Visual C# General Restricting parameter values?
Job Lot
But aren't enum integer based I want to validate string values.
But aren't enum integer based I want to validate string values.
Re: Visual C# General Restricting parameter values?
Sakthi Kumaran
use .ToString() method to get the string from Enum datatype.
U can't use spaces in between the string in this case.
U can also throw the exception for restricting.
use .ToString() method to get the string from Enum datatype.
U can't use spaces in between the string in this case.
U can also throw the exception for restricting.
Re: Visual C# General Restricting parameter values?
~rabin
In my opinion you have two ways to handle this situation:
1) Define an enum as others have said earlier.
In this way you don't have to enforce anything to user, just define a function like
and user cannot pass anything except the predefined values.
2) Check the values manually and throw exception
{
This will enforce user to pass only one of those values.
But I would prefer option 1 to 2.
In my opinion you have two ways to handle this situation:
1) Define an enum as others have said earlier.
Code Block
enum Values
{
Open,
Close,
High,
Low,
Close,
High,
Low,
}
Code Block
void MyFunction(Values value)
{
if (value == Values.Open)
//do something
string strValue = value.ToString() //this will give the value in string like "Open", "Close" etc.
}
and user cannot pass anything except the predefined values.
2) Check the values manually and throw exception
Code Block
void MyFunction(string value){
if(value != "Open" && value != "Close" && value != "High" && value != "Low")
{
{
throw new ArgumentException("Unknown value.", "value");
}
} But I would prefer option 1 to 2.
Re: Visual C# General Restricting parameter values?
Zamial
Yep Enum.
You stated your options for teh string and there is no spaces 
.
However if there is I guess for simplicity you could create a string array or list containing your values and use the Contains method no the list to check the entry is allowed.
Otherwise use an Enum