In .NET you can normalize (NFC, NFD, NFKC, NFKD) strings with String.Normalize()
and there is a Text.NormalizationForm
enum.
In .NET for Windows Store Apps, both are not available. I have looked in the String
class and in the System.Text
and System.Globalization
namespaces, but found nothing.
Have I missed something? How do I normalize strings in Windows Store Apps?
Does anyone have an idea why the Normalize
method was not made available for Store Apps?
Normalize() Returns a new string whose textual value is the same as this string, but whose binary representation is in Unicode normalization form C.
As you've pointed out, the Normalize
method is not available on the String
class on Windows store apps.
However, this just calls the NormalizeString
function in the Windows API.
Even better, this function is in the approved list of Win32 and COM API functions usable in Windows Store apps.
That said, you'd make the following declarations:
public enum NORM_FORM
{
NormalizationOther = 0,
NormalizationC = 0x1,
NormalizationD = 0x2,
NormalizationKC = 0x5,
NormalizationKD = 0x6
};
[DllImport("Normaliz.dll", CharSet = CharSet.Unicode, ExactSpelling = true,
SetLastError = true)
public static extern int NormalizeString(NORM_FORM NormForm,
string lpSrcString,
int cwSrcLength,
StringBuilder lpDstString,
int cwDstLength);
You'd then call it like so:
// The form.
NORM_FORM form = ...;
// String to normalize.
string unnormalized = "...";
// Get the buffer required.
int bufferSize =
NormalizeString(form, unnormalized, unnormalized.Length, null, 0);
// Allocate the buffer.
var buffer = new StringBuilder(bufferSize);
// Normalize.
NormalizeString(form, unnormalized, unnormalized.Length, buffer, buffer.Length);
// Check for and act on errors if you want.
int error = Marshal.GetLastWin32Error();
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