public static sbyte?GetSByte(object val, bool parse)
{
if (val == null)
{
return(null);
}
try {
TypeCode tc = val.GetTypeCode();
switch (tc)
{
case TypeCode.String:
if (!parse)
{
return(null);
}
sbyte n;
if (!TryFromServer(Convert.ToString(val), out n, 0))
{
return(null);
}
return(n);
case TypeCode.Byte: return(unchecked ((sbyte)(byte)val));
default:
if (IsNumeric(tc))
{
return(Convert.ToSByte(val));
}
byte[] b = val as byte[];
int ix = 0;
if (b?.Length == sizeof(byte))
{
return(IOEx.GetSByte(b, ref ix));
}
return(null);
}
} catch { return(null); }
}