|
Subject:
|
static Class in ASP
|
|
Posted By:
|
chafor
|
Post Date:
|
1/9/2006 1:50:42 PM
|
Hi, I want to make a static class for my special function like MD5String. I'm pretty sure of my syntaxe but the compilator says on then line (public static class CMD5) : "c:\inetpub\wwwroot\HelloWorld\CMD5.cs(8): Le modificateur 'static' n'est pas valide pour cet élément" or in english : "The modificator 'static' is not valide for this element"
public static class CMD5
{
public static string MD5String(string password)
{
MD5CryptoServiceProvider x = new System.Security.Cryptography.MD5CryptoServiceProvider();
byte[] bs = Encoding.UTF8.GetBytes(password);
bs = x.ComputeHash(bs);
StringBuilder s = new System.Text.StringBuilder();
foreach (byte b in bs)
{
s.Append(b.ToString("x2").ToLower());
}
password = s.ToString();
return password;
}
}
|
|
Reply By:
|
chafor
|
Reply Date:
|
1/9/2006 3:27:17 PM
|
The answer is simple I needed to use
public sealed class CMD5
instead of
public static class CMD5
|
|
Reply By:
|
planoie
|
Reply Date:
|
1/11/2006 12:30:42 PM
|
Note that the change you made wasn't really a 'fix' per se.
You can not use the modifier "static" on a class. You could say that technically, all classes are static, because they are type definitions. You can (as you did) make a METHOD static so you can reference by type without the need for an object instance.
The "sealed" modifier means that your class can not be inherited.
-Peter
|
|
Reply By:
|
chafor
|
Reply Date:
|
1/11/2006 3:26:11 PM
|
I have taken this exemple directly from MSDN:
public static class TemperatureConverter
{
public static double CelsiusToFahrenheit(string temperatureCelsius)
{
// Convert argument to double for calculations.
double celsius = System.Double.Parse(temperatureCelsius);
// Convert Celsius to Fahrenheit.
double fahrenheit = (celsius * 9 / 5) + 32;
return fahrenheit;
}
public static double FahrenheitToCelsius(string temperatureFahrenheit)
{
// Convert argument to double for calculations.
double fahrenheit = System.Double.Parse(temperatureFahrenheit);
// Convert Fahrenheit to Celsius.
double celsius = (fahrenheit - 32) * 5 / 9;
return celsius;
}
}
Why can they maked the class static? Is it because it's in ASP.NET2.0?
And I fogot;) Thanks
|
|
Reply By:
|
planoie
|
Reply Date:
|
1/13/2006 9:58:01 AM
|
Here's the current documentation on the "class" keyword:
http://msdn.microsoft.com/library/en-us/csref/html/vcreftheclasstype.asp
From the docs:
"modifiers (Optional)
The allowed modifiers are new, abstract, sealed, and the four access modifiers."
I can't find anything regarding using the 'static' keyword but admittedly, I can't seem to get at the 2.0 msdn docs. I must not be awake yet.
-Peter
|
