#region DataReader转实体<T>

        /// <summary>
        /// DataReader转实体
        /// </summary>
        /// <typeparam name="T">实体类型</typeparam>
        /// <param name="dr">DataReader</param>
        /// <returns>实体对象</returns>
        public static T DataReaderToEntity<T>(IDataReader dr) where T : new()
        {
            T t = new T();
            if (dr == null) return default(T);
            using (dr)
            {
                if (dr.Read())
                {
                    // 获得实体的公共属性
                    PropertyInfo[] propertys = t.GetType().GetProperties();
                    List<string> listFieldName = new List<string>(dr.FieldCount);
                    for (int i = 0; i < dr.FieldCount; i++)
                    {
                        listFieldName.Add(dr.GetName(i).ToLower());
                    }

                    foreach (PropertyInfo p in propertys)
                    {
                        string columnName = p.Name;
                        if (listFieldName.Contains(columnName.ToLower()))
                        {
                            // 判断此属性是否有Setter或columnName值是否为空
                            object value = dr[columnName];
                            if (!p.CanWrite || value is DBNull || value == DBNull.Value) continue;
                            try
                            {
                                #region SetValue
                                switch (p.PropertyType.ToString())
                                {
                                    case "System.String":
                                        p.SetValue(t, Convert.ToString(value), null);
                                        break;
                                    case "System.Int32":
                                        p.SetValue(t, Convert.ToInt32(value), null);
                                        break;
                                    case "System.Int64":
                                        p.SetValue(t, Convert.ToInt64(value), null);
                                        break;
                                    case "System.DateTime":
                                        p.SetValue(t, Convert.ToDateTime(value), null);
                                        break;
                                    case "System.Boolean":
                                        p.SetValue(t, Convert.ToBoolean(value), null);
                                        break;
                                    case "System.Double":
                                        p.SetValue(t, Convert.ToDouble(value), null);
                                        break;
                                    case "System.Decimal":
                                        p.SetValue(t, Convert.ToDecimal(value), null);
                                        break;
                                    default:
                                        p.SetValue(t, value, null);
                                        break;
                                }
                                #endregion
                            }
                            catch
                            {
                                //throw (new Exception(ex.Message));
                            }
                        }
                    }
                }
            }
            return t;
        }
        #endregion