常用的C#類

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using System;  using System.Collections.Generic;  using System.Data;  using System.Linq;  using System.Text;  using System.Web;        ///   /// DataTableConvertJson 的摘要說明  ///   public class DataTableConvertJson  {      public DataTableConvertJson()      {          //          // TODO: 在此處添加建構函式邏輯          //      }          #region dataTable轉換成Json格式      ///         /// dataTable轉換成Json格式        ///         ///         ///         public static string DataTable2Json(DataTable dt)      {          StringBuilder jsonBuilder = new StringBuilder();          //jsonBuilder.Append("{\"");          //jsonBuilder.Append(dt.TableName);          //jsonBuilder.Append("[");          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(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();      }          #endregion dataTable轉換成Json格式      #region DataSet轉換成Json格式      ///         /// DataSet轉換成Json格式        ///         /// DataSet       ///         public static string Dataset2Json(DataSet ds)      {          StringBuilder json = new StringBuilder();                foreach (DataTable dt in ds.Tables)          {              json.Append("{\"");              json.Append(dt.TableName);              json.Append("\":");              json.Append(DataTable2Json(dt));              json.Append("}");          } return json.ToString();      }      #endregion            ///       /// Msdn      ///       ///       ///       ///       public static string DataTableToJson(string jsonName, DataTable dt)      {          StringBuilder Json = new StringBuilder();          Json.Append("{\"" + jsonName + "\":[");          if (dt.Rows.Count > 0)          {              for (int i = 0; i < dt.Rows.Count; i++)              {                  Json.Append("{");                  for (int j = 0; j < dt.Columns.Count; j++)                  {                      Json.Append("\"" + dt.Columns[j].ColumnName.ToString() + "\":\"" + dt.Rows[i][j].ToString() + "\"");                      if (j < dt.Columns.Count - 1)                      {                          Json.Append(",");                      }                  }                  Json.Append("}");                  if (i < dt.Rows.Count - 1)                  {                      Json.Append(",");                  }              }          }          Json.Append("]}");          return Json.ToString();      }  }
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