C#实现集合转换成json格式数据的方法

/// <summary>/// dataTable转换成Json格式/// </summary>/// <param name="dt"></param>/// <returns></returns>public static string ToJson(DataTable dt){  if (dt != null && dt.Rows.Count > 0)  {    StringBuilder jsonBuilder = new StringBuilder();    jsonBuilder.Append("{/"");    jsonBuilder.Append("data");    jsonBuilder.Append("/":[");    for (int i = 0; i < dt.Rows.Count; i++)    {      jsonBuilder.Append("{");      for (int j = 0; j < dt.Columns.Count; j++)      {        jsonBuilder.Append("/"");        jsonBuilder.Append(dt.Columns[j].ColumnName);        jsonBuilder.Append("/":/"");        jsonBuilder.Append(jsonStringFromat(dt.Rows[i][j].ToString()));        jsonBuilder.Append("/",");      }      jsonBuilder.Remove(jsonBuilder.Length - 1, 1);      jsonBuilder.Append("},");    }    jsonBuilder.Remove(jsonBuilder.Length - 1, 1);    jsonBuilder.Append("]");    jsonBuilder.Append("}");    return jsonBuilder.ToString();  }  else  {    return "";  }}/// <summary>/// Enumerable转成JSON/// </summary>/// <param name="list"></param>/// <returns></returns>public static string EnumerableToJson(IEnumerable list){  StringBuilder json = new StringBuilder();  int i = 0;  if (list != null)  {    json.Append("{/"data/":[");    foreach (var item in list)    {      json.Append("{");      PropertyInfo[] pi = item.GetType().GetProperties();      int j = 0;      foreach (var p in pi)      {        if (j < pi.Length - 1)        {          json.Append("/"" + p.Name.ToString() + "/":/"" + jsonStringFromat(p.GetValue(item, null).ToString()) + "/",");        }        else        {          json.Append("/"" + p.Name.ToString() + "/":/"" + jsonStringFromat(p.GetValue(item, null).ToString()) + "/"");        }        j++;      }      i++;      json.Append("},");    }    json.Remove(json.Length - 1, 1);    json.Append("]}");  }  if (i != 0)    return json.ToString();  else    return "";}