Newtonsoft.Json 扩展方法 支持通过key获取Value Json字符串转对象

/// 

/// object  Json转换方法扩展
/// 
public static class JsonExtension
{
    /// 

    /// object转成Json字符串
    /// 
    /// object  需转换的对象
    /// 转换后的Json字符串
    public static string JsonToString(this object data)
    {
        return JsonConvert.SerializeObject(data);
    }

    /// 

    /// Json字符串转换成对象
    /// 
    /// 转成对象的类型
    /// 用于转换的Json字符串
    /// 转成后的对象
    public static T JsonFromString(this string str)
    {
        return JsonConvert.DeserializeObject(str);
    }

    /// 

    /// Json 格式化
    /// 
    /// json自负床
    /// 格式化后的Json自负床
    public static string JsonFormatOut(this string jsonStr)
    {
        //格式化json字符串
        JsonSerializer serializer = new JsonSerializer();
        TextReader tr = new StringReader(jsonStr);
        JsonTextReader jtr = new JsonTextReader(tr);
        object obj = serializer.Deserialize(jtr);
        if (obj != null)
        {
            StringWriter textWriter = new StringWriter();
            JsonTextWriter jsonWriter = new JsonTextWriter(textWriter)
            {
                Formatting = Formatting.Indented,
                Indentation = 4,
                IndentChar = ' '
            };
            serializer.Serialize(jsonWriter, obj);
            return textWriter.ToString();
        }
        else
        {
            return jsonStr;
        }
    }

    /// 

    /// 通过Json数据中的key获取对应的Value 重名的获取第一个
    /// 
    /// 所获取数据的数据类型
    /// JObject对象
    /// key
    /// key对应的Value  没有找到时返回null
    public static T GetValueByKey(this JObject jObject, string key)
    {
        var tempValue = jObject.GetValue(key);
        if (tempValue != null)
        {
            return tempValue.Value();
        }
        else
        {
            var enumerator = jObject.GetEnumerator();
            while (enumerator.MoveNext())
            {
                if (enumerator.Current.Value.HasValues)
                {
                    T tempTValue = GetValueByKey(enumerator.Current.Value as JObject, key);
                    if (tempTValue != null)
                    {
                        return tempTValue;
                    }
                }
            }
        }

        return default(T);
    }

    /// 

    /// 通过描述路径获取对应的Value
    /// 
    /// 所获取数据的数据类型
    /// JObject对象
    /// 描述路径,key之间通过分割符进行分割
    /// 路径描述中key分割符
    /// 描述路径对的值
    public static T GetValueByPath(this JObject jObject, string path, params char[] separator)
    {
        if (!string.IsNullOrEmpty(path))
        {
            string[] keys = path.Split(separator);
            JObject ptrJObject = jObject;
            int count = keys.Count();
            for (int index = 0; index < count; ++index)
            {
                if (ptrJObject != null)
                {
                    if (index == count - 1)
                    {
                        return ptrJObject.GetValue(keys[index]).Value();
                    }

                    ptrJObject = ptrJObject.GetValue(keys[index]).Value();
                }
            }
        }

        return default(T);
    }

    /// 

    /// 通过描述路径获取对应的Value
    /// 
    /// 所获取数据的数据类型
    /// JObject对象
    /// 描述路径,key之间通过"."进行分割
    /// 描述路径对的值
    public static T GetValueByPath(this JObject jObject, string path)
    {
        return GetValueByPath(jObject, path, '.');
    }
}

转载于:https://my.oschina.net/sanyuni/blog/2873789