C# Signature:
[DllImport("kernel32.dll")]
static extern int MultiByteToWideChar(uint CodePage, uint dwFlags, string
lpMultiByteStr, int cbMultiByte, [Out, MarshalAs(UnmanagedType.LPWStr)]
StringBuilder lpWideCharStr, int cchWideChar);
Alternative version
[DllImport("kernel32.dll")]
private static extern int MultiByteToWideChar(
uint CodePage,
uint dwFlags,
[MarshalAs(UnmanagedType.LPArray)] Byte[] lpMultiByteStr,
int cbMultiByte,
[Out, MarshalAs(UnmanagedType.LPArray)]
Byte[] lpWideCharStr,
int cchWideChar);
User-Defined Types:
None.
Notes:
None.
Tips & Tricks:
Please add some!
Sample Code:
public class Multibyte {
[DllImport("kernel32.dll")]
private static extern int MultiByteToWideChar(
uint CodePage,
uint dwFlags,
[MarshalAs(UnmanagedType.LPArray)] Byte[] lpMultiByteStr,
int cbMultiByte,
[Out, MarshalAs(UnmanagedType.LPArray)]
Byte[] lpWideCharStr,
int cchWideChar);
[SqlFunction]
public static SqlString ConvToUnicode(SqlInt32 codepage, SqlString multibyteString) {
bool un;
byte[] b = (byte[])iConvToMultibyteArray(multibyteString, out un);
if (un) return (SqlString)ToUnicode((uint)(int)codepage, b);
else return multibyteString;
}
private static SqlBinary iConvToMultibyteArray(SqlString multibyteString, out bool multibyte) {
byte[] result;
byte[] ch = multibyteString.GetUnicodeBytes();
if ((ch.Length >= 2) && (ch[1] == 0x00)) {
result = new byte[ch.Length / 2];
for (int i = 0; i < ch.Length / 2; i++) {
result[i] = ch[i * 2];
}
multibyte = true;
}
else {
result = ch;// new byte[ch.Length];
multibyte = false;
}
return (SqlBinary)result;
}
}
Alternative Managed API:
Do you know one? Please contribute it!
