public static bool IsNullOrEmpty(this DataTable dt)

        {

            return dt == null || dt.Rows.Count <= ;

        }

        public static bool IsNotEmpty(this DataTable dt)

        {

            return dt.IsNullOrEmpty() == false;

        }

        #region DataTable Extension

        /// <summary>

        /// 获取字符串

        /// </summary>

        /// <param name="pColumnName">列名</param>

        /// <returns></returns>

        public static string GetStringValue(this DataTable data, int rowIndex, string pColumnName)

        {

            return GetValue(data, rowIndex, pColumnName).ToSafeStr();

        }

        /// <summary>

        /// 获取整型

        /// </summary>

        /// <param name="pColumnName">列名</param>

        /// <returns></returns>

        public static int GetIntValue(this DataTable data, int rowIndex, string pColumnName)

        {

            return GetStringValue(data, rowIndex, pColumnName).ToInt();

        }

        /// <summary>

        /// 获取浮点型

        /// </summary>

        /// <param name="pColumnName">列名</param>

        /// <returns></returns>

        public static float GetFloatValue(this DataTable data, int rowIndex, string pColumnName)

        {

            return GetStringValue(data, rowIndex, pColumnName).ToFloat();

        }

        /// <summary>

        /// 获取Boolean

        /// </summary>

        /// <param name="pColumnName">列名</param>

        /// <returns></returns>

        public static bool GetBooleanValue(this DataTable data, int rowIndex, string pColumnName)

        {

            string v = GetStringValue(data, rowIndex, pColumnName).ToLower();

            return v.ToBoolean();

        }

        public static decimal GetDecimalValue(this DataTable data, int rowIndex, string pColumnName)

        {

            return GetStringValue(data, rowIndex, pColumnName).ToDecimal();

        }

        public static object GetValue(this DataTable data, int rowIndex, string pColumnName)

        {

            if (data == null || rowIndex <  || rowIndex >= data.Rows.Count) return null;

            return data.Rows[rowIndex].GetValue(pColumnName);

        }

        /// <summary>

        /// 判断DataTable 是否为空

        /// </summary>

        public static bool IsNullOrEmpty(this DataTable data)

        {

            return data == null || data.Rows.Count <= ;

        }

        /// <summary>

        /// 判断DataTable 不为空

        /// </summary>

        public static bool IsNotEmpty(this DataTable data)

        {

            return data.IsNullOrEmpty() == false;

        }

        #endregion

        #region DataRow Extension

        /// <summary>

        /// 获取字符串

        /// </summary>

        /// <param name="pColumnName">列名</param>

        /// <returns></returns>

        public static string GetStringValue(this DataRow row, string pColumnName)

        {

            return GetValue(row, pColumnName).ToSafeStr();

        }

        /// <summary>

        /// 获取整型

        /// </summary>

        /// <param name="pColumnName">列名</param>

        /// <returns></returns>

        public static int GetIntValue(this DataRow row, string pColumnName)

        {

            return GetStringValue(row, pColumnName).ToInt();

        }

        /// <summary>

        /// 获取浮点型

        /// </summary>

        /// <param name="pColumnName">列名</param>

        /// <returns></returns>

        public static float GetFloatValue(this DataRow row, string pColumnName)

        {

            return GetStringValue(row, pColumnName).ToFloat();

        }

        /// <summary>

        /// 获取Boolean

        /// </summary>

        /// <param name="pColumnName">列名</param>

        /// <returns></returns>

        public static bool GetBooleanValue(this DataRow row, string pColumnName)

        {

            string v = GetStringValue(row, pColumnName);

            return v.ToBoolean();

        }

        public static object GetValue(this DataRow row, string pColumnName)

        {

            if (row == null) return null;

            if (pColumnName.IsNullOrEmpty()) return null;

            if (!row.Table.Columns.Contains(pColumnName)) return null;

            return row[pColumnName];

        }

        #endregion