Sie können die folgenden Methoden (see this site), um das Zeichen aus dem Schlüssel zu erhalten.
protected override void OnPreviewKeyDown(KeyEventArgs e)
{
bool toUnicodeIsTrue=false;
char t = GetCharFromKey(e.Key, ref toUnicodeIsTrue);
if (t == '/')
{
// do stuff
}
base.OnPreviewKeyDown(e);
}
public static char GetCharFromKey(System.Windows.Input.Key key, ref bool toUnicodeIsTrue)
{
toUnicodeIsTrue = true;
char ch = ' ';
// First, you need to get the VirtualKey code. Thankfully, there’s a simple class
// called KeyInterop, which exposes a static method VirtualKeyFromKey
// that gets us this information
int virtualKey = System.Windows.Input.KeyInterop.VirtualKeyFromKey(key);
//Then, we need to get the character. This is much trickier.
//First we have to get the keyboard state and then we have to map that VirtualKey
//we got in the first step to a ScanCode, and finally, convert all of that to Unicode,
//because .Net doesn’t really speak ASCII
byte[] keyboardState = new byte[256];
GetKeyboardState(keyboardState);
uint scanCode = MapVirtualKey((uint)virtualKey, MapType.MAPVK_VK_TO_VSC);
StringBuilder stringBuilder = new StringBuilder(2);
int result = ToUnicode((uint)virtualKey, scanCode, keyboardState, stringBuilder, stringBuilder.Capacity, 0);
switch (result)
{
case -1:
toUnicodeIsTrue = false;
break;
case 0:
toUnicodeIsTrue = false;
break;
case 1:
{
ch = stringBuilder[0];
break;
}
default:
{
ch = stringBuilder[0];
break;
}
}
return ch;
}
[System.Runtime.InteropServices.DllImport("user32.dll")]
public static extern bool GetKeyboardState(byte[] lpKeyState);
[System.Runtime.InteropServices.DllImport("user32.dll")]
public static extern uint MapVirtualKey(uint uCode, MapType uMapType);
public enum MapType : uint
{
MAPVK_VK_TO_VSC = 0x0,
MAPVK_VSC_TO_VK = 0x1,
MAPVK_VK_TO_CHAR = 0x2,
MAPVK_VSC_TO_VK_EX = 0x3,
}
[System.Runtime.InteropServices.DllImport("user32.dll")]
public static extern int ToUnicode(
uint wVirtKey,
uint wScanCode,
byte[] lpKeyState,
[System.Runtime.InteropServices.Out, System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr, SizeParamIndex = 4)]
StringBuilder pwszBuff,
int cchBuff,
uint wFlags);
}
Meine alte Antwort:
protected override void OnPreviewKeyDown(KeyEventArgs e)
{ //***
if (e.Key == Key.Oem2)
{
// do stuff
}
base.OnPreviewKeyDown(e);
}
Beachten Sie, dass der Name beginnt mit "OEM" (Original Equipment Manufacturer), die die Tastatur Hersteller bedeutet, ist für seine Funktionalität verantwortlich und variiert in lokalen Tastaturen. Sie können also einen Unterbrechungspunkt in
Zeile meines Codes festlegen und e.Key-Eigenschaft überprüfen.
wie etwa 'e.KeyChar'? –
@ SelmanGenç gibt es keine e.KeyChar in WPF, sollte ich Windows-Formular-Bibliothek enthalten, als es mit meinen MessageBoxes, die in Win-Form existieren auch versäumen –