我有一个应用程序可以记录用户按下的任何内容，但是当我按下特殊字符（如´with a, 来获取á）时，我得到´´a; 当我想得到同样的东西时à，我得到``a了，所以所有特殊字符都输入两次，然后输入常规字符。
我一直在寻找，真的找不到任何东西。但我注意到问题出在ToAscii方法上，没有正确输入字符。
public string GetString(IntPtr lParam, int vCode)
{
try
{
bool shift = Keys.Shift == Control.ModifierKeys || Console.CapsLock;
string value = "";
KeyboardHookStruct MyKeyboardHookStruct =
(KeyboardHookStruct)Marshal.PtrToStructure(
lParam, typeof(KeyboardHookStruct));
byte[] keyState = new byte[256];
byte[] inBuffer = new byte[2];
DllClass.GetKeyboardState(keyState);
var ascii=
DllClass.ToAscii(
MyKeyboardHookStruct.vkCode,
MyKeyboardHookStruct.scanCode,
keyState, inBuffer, MyKeyboardHookStruct.flags
);
if (ascii == 1)
{
char key = (char)inBuffer[0];
if ((shift) && Char.IsLetter(key))
key = Char.ToUpper(key);
value = key.ToString();
}
return value;
}
catch (Exception)
{
return "";
}
}
我错过了什么或做错了什么？所有其他字符都可以正常工作，但特殊字符以双字符形式出现。
编辑：
尝试使用ToUnicode。
[DllImport("USER32.DLL", CharSet = CharSet.Unicode)]
public static extern int ToUnicode(
uint virtualKey, uint scanCode, byte[] keyStates,
[MarshalAs(UnmanagedType.LPArray)] [Out] char[] chars,
int charMaxCount, uint flags);
public string GetString(IntPtr lParam, int vCode)
{
try
{
bool shift = Keys.Shift == Control.ModifierKeys || Console.CapsLock;
string value = "";
KeyboardHookStruct MyKeyboardHookStruct =
(KeyboardHookStruct)Marshal.PtrToStructure(
lParam, typeof(KeyboardHookStruct));
byte[] keyState = new byte[256];
byte[] inBuffer = new byte[2];
char[] chars = new char[2];
DllClass.GetKeyboardState(keyState);
int val = 0;
val = ToUnicode(
(uint)MyKeyboardHookStruct.vkCode,
(uint)MyKeyboardHookStruct.scanCode,
keyState, chars, chars.Length, 0
);
val = ToUnicode(
(uint)MyKeyboardHookStruct.vkCode,
(uint)MyKeyboardHookStruct.scanCode,
keyState, chars, chars.Length, 0
);
if (val == 1)
{
char key = (char)chars[0];
if ((shift) && Char.IsLetter(key))
key = Char.ToUpper(key);
value = key.ToString();
}
return value;
}
catch (Exception)
{
return "";
}
}
有人请帮助我，我真的需要弄清楚这一点=/。
编辑：
int val = -1;
if (IsDeadKey((uint)vCode))
{
while (val == -1)
{
val = ToUnicode(
(uint)MyKeyboardHookStruct.vkCode,
(uint)MyKeyboardHookStruct.scanCode,
keyState, chars, chars.Length, 0
);
}
}
else
val = ToUnicode(
(uint)MyKeyboardHookStruct.vkCode,
(uint)MyKeyboardHookStruct.scanCode,
keyState, chars, chars.Length, 0
);
所以现在我尝试调用ToAsciiorToUnicode几次来刷新真实角色，但没有成功。我做错了吗？
就像 ASCII 一样，首先调用´I get -1，所以我再次调用它，然后我得到1; 然后我按like a，得到á，但后来我只得到a。同样的事情，如果我ToUnicode一个接一个地使用两次，我得到的只是a代替á，等等......
