private static Hashtable SplitConnectionString(string connectionString, Hashtable synonyms, bool firstKey)
{
Hashtable parsetable = new Hashtable();
Regex parser = (firstKey ? s_connectionStringRegexOdbc : s_connectionStringRegex);
const int KeyIndex = 1, ValueIndex = 2;
Debug.Assert(KeyIndex == parser.GroupNumberFromName("key"), "wrong key index");
Debug.Assert(ValueIndex == parser.GroupNumberFromName("value"), "wrong value index");
if (null != connectionString)
{
Match match = parser.Match(connectionString);
if (!match.Success || (match.Length != connectionString.Length))
{
throw ADP.ConnectionStringSyntax(match.Length);
}
int indexValue = 0;
CaptureCollection keyvalues = match.Groups[ValueIndex].Captures;
foreach (Capture keypair in match.Groups[KeyIndex].Captures)
{
string keyname = (firstKey ? keypair.Value : keypair.Value.Replace("==", "=")).ToLower(CultureInfo.InvariantCulture);
string keyvalue = keyvalues[indexValue++].Value;
if (0 < keyvalue.Length)
{
if (!firstKey)
{
switch (keyvalue[0])
{
case '\"':
keyvalue = keyvalue.Substring(1, keyvalue.Length - 2).Replace("\"\"", "\"");
break;
case '\'':
keyvalue = keyvalue.Substring(1, keyvalue.Length - 2).Replace("\'\'", "\'");
break;
default:
break;
}
}
}
else
{
keyvalue = null;
}
DebugTraceKeyValuePair(keyname, keyvalue, synonyms);
string realkeyname = ((null != synonyms) ? (string)synonyms[keyname] : keyname);
if (!IsKeyNameValid(realkeyname))
{
throw ADP.KeywordNotSupported(keyname);
}
if (!firstKey || !parsetable.ContainsKey(realkeyname))
{
parsetable[realkeyname] = keyvalue; // last key-value pair wins (or first)
}
}
}
return parsetable;
}