获取Json数据某节点的值

public static string GetJsonValue(string jsonStr, string key) { string result = string.Empty; if (!string.IsNullOrEmpty(jsonStr)) { key = "\"" + key.Trim('"') + "\""; int index = jsonStr.IndexOf(key) + key.Length + 1; if (index > key.Length + 1) { //先截逗号，若是最后一个，截“｝”号，取最小值 int end = jsonStr.IndexOf(',', index); if (end == -1) { end = jsonStr.IndexOf('}', index); } result = jsonStr.Substring(index, end - index); result = result.Trim(new char[] { '"', ' ', '\'' }); //过滤引号或空格  } } return result; }

 --上面的不规范，参考下面写法

  public static String GetJsonValue(String jsonStr, String key){
        String result ="";
        if (!jsonStr.equals("")){
            key = "\"" + key.trim() + "\"";
            int index = jsonStr.indexOf(key) + key.length() + 1;
            if (index > key.length() + 1){
                //先截逗号，若是最后一个，截“｝”号，取最小值
                int end = jsonStr.indexOf(',', index);
                if (end == -1){
                    end = jsonStr.indexOf('}', index);
                }

                result = jsonStr.substring(index, end - index);
                result = result.trim(); //过滤引号或空格
            }
        }
        return result;
    }

public static string GetXMLstrByKey(string Key, XmlDocument xml) { object strValue = xml.SelectSingleNode("xml").SelectSingleNode(Key).InnerText; if (strValue != null) { return strValue.ToString(); } else { return ""; } }