获取Json数据某节点的值

#region 获取Json字符串某节点的值
/// <summary>
/// 获取Json字符串某节点的值
/// </summary>
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 + ;
if (index > key.Length + )
{
//先截逗号，若是最后一个，截“｝”号，取最小值
int end = jsonStr.IndexOf(',', index);
if (end == -)
{
end = jsonStr.IndexOf('}', index);
} result = jsonStr.Substring(index, end - index);
result = result.Trim(new char[] { '"', ' ', '\'' }); //过滤引号或空格
}
}
return result;
}
#endregion

#region XML KEY
/// <summary>
/// XML KEY 通用方法
/// </summary>
/// <returns></returns>
public static string GetXMLstrByKey(string Key, XmlDocument xml)
{
object strValue = xml.SelectSingleNode("xml").SelectSingleNode(Key).InnerText;
if (strValue != null)
{
return strValue.ToString();
}
else
{
return "";
}
}
#endregion