String Comparison containing hyphens not matching
- by Christo Fur
I have a method in a url rewriting module that looks like this
public bool Match(Uri url)
{
string x = url.PathAndQuery.ToLowerInvariant();
string y = RuleData.ToLowerInvariant();
return x.Contains(y);
}
However, it is not returning true for the following values:
x = "/xx09-02-09xx";
y = "09-02-09";
but if I write a unit test with the raw strings, like below, it does return true
[Test]
public void Contains()
{
string x = "/xx09-02-09xx";
string y = "09-02-09";
Assert.IsTrue(x.Contains(y)); // this returns true
}
What could be the difference?
The encoding?
The culture?
Have tried removing the ToLowerInvarient(), but that makes no difference
have tried all the following in the Match method
bool contains = x.Contains(y);
bool contains1 = x.IndexOf(y) != -1;
bool contains2 = x.IndexOf(y, StringComparison.OrdinalIgnoreCase) != -1;
bool contains3 = x.IndexOf(y, StringComparison.InvariantCultureIgnoreCase) != -1;
bool contains4 = x.IndexOf(y, StringComparison.CurrentCultureIgnoreCase) != -1;
but none return true for those values, when run in the rewrite module. But they do in the unit test. So something about the strings is clearly different
any ideas?
