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3komma14 edited this page Dec 3, 2011
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A simple Guard and validator library made in c#. Library also available at NuGet.
Need more checks?? Please contribute or contact me.
Guard.That(...) will throw an exception, when some condition is not met
public void SomeMethod(int arg1, int arg2)
{
// This line will throw an exception when the arg1 is less or equal to arg2
Guard.That(() => arg1).IsGreaterThan(arg2);
// This will check that arg1 is not null and that is in some range 1..100
Guard.That(arg2).IsNotNull().IsInRange(1,100);
// Several checks can be added.
Guard.That(arg1).IsInRange(100,1000).IsEven().IsTrue(x => x > 50, "Must be over 500");
// Do stuff
}Validate.That(...) makes is possible to get a list of all error conditions
public void OtherMethod(int arg1)
{
// Get a list of errors
List<string> errors = Validate.That(() => arg1).IsNotNull().GetResult();
}Create your own extension
public static Arg<int> IsNotNegative(this Arg<int> arg)
{
if (arg.Value < 0)
{
arg.Message.Set("Argument is negative");
}
return arg;
}The following checks are available. But the best documentation is currently the tests. New checks can easily be made by creating a extension method.
For object:
- Is
- IsNotDefault
For bool:
- IsTrue
- IsFalse
For class:
- IsNotNull
For IComparable (Int32, Double, String, Char, DateTime and other classes implementing the interface)
- IsEqual
- IsGreatherThan
- IslessThan
- IsInRange
For int and long:
- IsOdd
- IsEven
- IsPrime
For string:
- IsNotEmpty
- IsNotNullOrEmpty
- StartsWith
- EndsWith
- Length
- Contains
- IsMatch
For IEnumerable:
- IsNotEmpty
- Length
- Conatins
For Guid:
- IsNotEmpty