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Hi
Can somebody point me to a standard/common method of storing and retrieving constants in code?
The things that come to my mind:
1) Strore them in a module.
Drawback: Would not know the origins of the constant by reading the code. There can be more than one module and constants can be spread across them..
2) Store them in a class as Shared (static in C#) variables.
Drawback: Cannot define them as const, hence the probability of somebody changing the value remains.
3) Store them in a class as Shared (static in C#)ReadOnly Properties.
Drawback: None that I can see (actually this occurred to me while typing this post).
What would be your suggestions and what do you do?
As an aside, do you follow some naming convention for these constants to denote what they might contain and to help in classification?
Shreekar
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There are two types of constant values, constants and read-only members. You have to decide what type you want to use.
Constants are compiled into the code, so if you use a constant from a different project, and then change the constant in that project, you have to recompile the code that uses the constant in order for it to change there too.
Read-only members are read from the source every time, so if you change the value, it's guaranteed to change everywhere it's used. Also, a read-only member can get it's value from an external source like AppSettings. If the external source is expensive to read (like a file or a web service), you can read it the first time it's used and cache it in a local variable.
I usually create a static class called Settings where I put application wide constants and settings. It will contain constants and read-only static properties.
---
Year happy = new Year(2007);
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Hi
Does anybody have any insight as to what exactly this method does?
MSDN shows This[^]
not really helpful. Has somebody used this?
Any ideas?
Shreekar
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Hello,
Any simple way to create custom MSBuild or customize VS.NET 2005 to be
able to build say "Standard", "Professional" and "Enterprise" versions
of a product from the same sources?
Any available tools?
I want to build different versions from the sample source, including
and excluding some features/codes from some versions.
With love,
Paul.
Jesus Christ is LOVE! Please tell somebody.
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I see three different approaches, all with their specific drawbacks:
You could use conditional compilation:
- add #if SYMBOL ... #endif to your source code
- create a new configuration with Configuration Manager
- set the appropriate symbols in Project Properties/Build/Conditional Compilation Symbols
This is only practicle for small differences though.
Or you could just make different projects. Now you must solve the problem anout sharing source
code. Two methods are available:
- since Visual insists on each project having its own directory, create them first,
then move the project files to the original folder and restart Visual.
- or keep the different directories, but rather than adding the source files, use the
"add as link" option hidden under the right arrow of the Add button.
This solution gets painful if you often add files, since now you must repeat this for
each project.
Finally, you could just build one version and cripple it in some way. Of course this
approach is vulnerable, the crippling code could be hacked by the end-user.
Luc Pattyn
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Can someone tell me what the caspol command would be to "My Computer / Runtime Security Policy / Machine / Code Groups / All_Code / LocalIntranet_Zone" to "FullTrust"????
Something like:
Caspol -cg localintranet_zone fulltrust
perhaps?????
I don't want to screw this stuff up.
Thanks
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Is there any particular order you need to follow to install
.net framework, IIS6.0, SDK, sql express 2005, msxml 6.0 parser.
Our network admin configured the server and I'm not sure if the configuration is correct. My .net application isn't working. Any suggestions?
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IIS6 should have been first, MSXML 6.0, then the .NET Framework, whatever that SDK is, then SQL Express.
Dave Kreskowiak
Microsoft MVP - Visual Basic
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When you deploy a vb.net application to a server, does it have to be in the wwwroot folder? Also, if jpg's aren't showing on the application what problem might be causing that?
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Jonathan Snyder wrote: When you deploy a vb.net application to a server, does it have to be in the wwwroot folder?
No. If you create another root in IIS, it can be created under a different folder. But, I've never seen anyone go through the trouble other than ISP's.
Jonathan Snyder wrote: if jpg's aren't showing on the application what problem might be causing that?
Usually, the wrong URL path specified in the HTML.
Dave Kreskowiak
Microsoft MVP - Visual Basic
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Sir,
I have created a windows forms control in which I put a DSO Framer control. I have compiled it and registered in GAC. Even its doing fine when I used it in another windows application. But When I try to put it in a web page its not showing anything as it is the same thing showing the required word doc in windows application.
Please tell me what are the steps do I need to take to make it fine. Thank you.
Regards,
S/W Engineer
Akebono Soft Technologies
aleem_abdul@akebonosoft.com.
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Please, PLEASE don't start cross posting the entire site again . This is an ASP.NET question, it's the ASP.NET part that is the problem. You've asked there, so leave it at that.
Christian Graus - C++ MVP
'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert
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Its Ok. But only in two related parts of this forum. It wont be be a problem. I will not do as I did earlier. I will post in two forums only. Thank you.
Regards,
S/W Engineer
Akebono Soft Technologies
aleem_abdul@akebonosoft.com.
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Hi friends am Nithin.
I had done 4 or 5 webservice using http post method and wsdl...
Am facing some trouble for making the soap request(in C#) for Apache server (in java).
Can any one help me how can make a soap request for this server????
Rgds
Nithin
Thanks
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Hi all
I have to find all LAN Machines IP Addresses and machines name so can any body tell me hoe it is possible and which namespace and API i have to use for that.
Thanks & Regards
Bankey
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There is no namespace or API that will do this. You have to generate a list of valid IP addresses for your subnet, then try and PING each one of those addresses to see if it responds. Even then, the list you generate may not be accurate if a machine is at the address, but is powered off or in the middle of rebooting.
Dave Kreskowiak
Microsoft MVP - Visual Basic
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Has any one had any experience with this exception. From what I understand it involves a problem with the MSIL compiler and JIT. After googling the exception, I found that almost all of the cases were different in their beleived cause for failure and mine, like the rest did not match anyone elses.
Well, after taking apart the code line by line (This error does not let you execute the base method, stops before the method is called) I finally deduced where my problem was!!! I had used => in C# instead of <= comparative operand. The compiler did not pick this up as an error and just failed to operate the method containing this.
I am eager to find some one else who could see if this is just my machine or is it in the framework itself. Also, I would like to know more about this exception.
Our developers never release code. Rather, it tends to escape, pillaging the countryside all around.
The Enlightenment Project (paraphrased comment)
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Can you post a code fragment with the => operator? I just tried to see if I could replicate it, and it's marked as an error during compile.
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Yes I can, I created a quick one class program that throws the error:
class Program
{
static void Main(string[] args)
{
decimal testDec = TestErr();
Console.WriteLine(testDec);
Console.Read();
}
public static decimal TestErr()
{
decimal one = 1.555M;
decimal two = 5.8888M;
if (one => two)
{
one += two;
}
else
{
one -= two;
}
return one;
}
}
Also, it might help to note that I am currently using .Net 3.0 instead of 2.0. I could not replicate the results on my home dev machine running 2.0. I need to find some one else with 3.0 framework to see if this is where the issue lies or is it unique to my machine.
Thanks
AAron
Our developers never release code. Rather, it tends to escape, pillaging the countryside all around.
The Enlightenment Project (paraphrased comment)
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=> is an operator in 3.0 for Lambda expressions. Are you confusing it with the >= operator?
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No, I was tired and being sloppy in my coding and inserted => when I wanted >=. This mistake should have been caught in the visual studio 2005 environment as an error, but it built cleanly. I understand that the syntax was wrong, but it let me run with no errors. On my home dev machine, the interface caught this as an error.
AAron
Our developers never release code. Rather, it tends to escape, pillaging the countryside all around.
The Enlightenment Project (paraphrased comment)
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Actually, the operator is valid, so the compiler may no capture it. You're probably not running 3.0 at home, because 2.0 doesn't have this operator, thus flagging as an error.
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I am running 2.0 at home. So theoretically you can compare two values with a lambda(=>) expression? If not, this should have been recognized as an invalid argument and displayed an error. I understand that the syntax is used in 3.0, but is it used in the describe context?
Our developers never release code. Rather, it tends to escape, pillaging the countryside all around.
The Enlightenment Project (paraphrased comment)
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Intellisense works by doing partial compiles of your code in the background, as you write it. The compiler didn't catch an error because there wasn't one. The expression is perfectly valid, it just doesn't do much except return the value of two.
You can find a little more on it here[^].
Dave Kreskowiak
Microsoft MVP - Visual Basic
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Which explains while it bombed at runtime - the if statement only accepts boolean results.
Our developers never release code. Rather, it tends to escape, pillaging the countryside all around.
The Enlightenment Project (paraphrased comment)
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