C#格式化json字符串的方法分析

实现代码如下：

private string ConvertJsonString(string str)
{
  //格式化json字符串
  JsonSerializer serializer = new JsonSerializer();
  TextReader tr = new StringReader(str);
  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 str;
  }
}