public static string CDataNormalize( string value ) {
int len = value.Length;
if ( len <= 0 ) {
return string.Empty;
}
int i = 0;
int startPos = 0;
StringBuilder norValue = null;
while ( i < len ) {
char ch = value[i];
if ( ch >= 0x20 || ( ch != 0x9 && ch != 0xA && ch != 0xD ) ) {
i++;
continue;
}
if ( norValue == null ) {
norValue = new StringBuilder( len );
}
if ( startPos < i ) {
norValue.Append( value, startPos, i - startPos );
}
norValue.Append( (char)0x20 );
if ( ch == 0xD && ( i+1 < len && value[i+1] == 0xA ) ) {
i += 2;
}
else {
i++;
}
startPos = i;
}
if ( norValue == null ) {
return value;
}
else {
if ( i > startPos ) {
norValue.Append(value, startPos, i-startPos);
}
return norValue.ToString();
}
}