正则用法

private str jsonKey2Lower(str _jStr)
{
    str jStr;
    str item;

    System.Text.RegularExpressions.Regex regex;
    System.Text.RegularExpressions.Match match;
    
    regex = new System.Text.RegularExpressions.Regex("\"([A-Za-z0-9]*)\"\:");
    match = regex.Match(_jStr);

    jStr = _jStr;
    while(match.Success)
    {
        item = match.Value;
        jStr = strReplace(jStr, item, strLwr(item));
        match = match.NextMatch();
    }
    return jStr;
}

refer from

origin = System.Text.RegularExpressions.Regex::Replace(origin,'<([A-Za-z0-9]*)>(\\s*|\n|\t|\r)</[A-Za-z0-9]*>','<$1/>');//压缩空节点。