QueryHelp

 //辅助查询 Author:高兵兵
 public class QueryHelp
 {
     #region IList<T> ToList<T>(string cmdText,string connString) where T : new()
     /// <summary>
     /// 返回一个list
     /// </summary>
     /// <typeparam name="T">实体模型</typeparam>
     /// <param name="cmdText">存储过程名</param>
     /// <param name="connString">连接字符串</param>
     /// <returns></returns>
     public static IList<T> ToList<T>(string cmdText, string connString) where T : new()
     {
         using (var read = DbHelp.Create().ExecuteDataReader(cmdText, connString))
         {
             IList<T> list = null;
             var type = typeof(T);
             if (read.HasRows)
             {

                 list = new List<T>();
             }
             while (read.Read())
             {
                 T t = new T();
                 foreach (PropertyInfo item in type.GetProperties())
                 {
                     for (int i = ; i < read.FieldCount; i++)
                     {
                         //属性名与查询出来的列名比较
                         if (item.Name.ToLower() != read.GetName(i).ToLower()) continue;
                         var value = read[i];
                         if (value != DBNull.Value)
                         {
                             item.SetValue(t, value, null);
                         }
                         break;
                     }
                 }
                 //将创建的对象添加到集合中
                 list.Add(t);
             }
             return list;
         }
     }
     #endregion

     #region  IList<T> ToList<T>(string cmdText, List<DbParameter> listpar, string connString) where T : class, new()
     /// <summary>
     /// 返回一个list
     /// </summary>
     /// <typeparam name="T">实体模型</typeparam>
     /// <param name="cmdText">存储过程名</param>
     /// <param name="listpar">参数列表</param>
     /// <param name="connString">连接字符串</param>
     /// <returns></returns>
     public static IList<T> ToList<T>(string cmdText, List<DbParameter> listpar, string connString) where T : class, new()
     {
         using (var read = DbHelp.Create().ExecuteDataReader(cmdText, listpar, connString))
         {
             List<T> list = null;
             var type = typeof(T);
             if (read.HasRows)
             {

                 list = new List<T>();
             }
             while (read.Read())
             {
                 T t = new T();
                 foreach (PropertyInfo item in type.GetProperties())
                 {
                     for (int i = ; i < read.FieldCount; i++)
                     {
                         //属性名与查询出来的列名比较
                         if (item.Name.ToLower() != read.GetName(i).ToLower()) continue;
                         object value = read[i];
                         if (value != DBNull.Value)
                         {
                             item.SetValue(t, value, null);
                         }
                         break;
                     }
                 }
                 //将创建的对象添加到集合中
                 list.Add(t);
             }
             return list;
         }
     }
     #endregion

     #region  IList<T> ToListAsPager<T>(string cmdText, List<DbParameter> listpar, string connString) where T : class, new()
     /// <summary>
     /// 返回一个list
     /// </summary>
     /// <typeparam name="T">实体模型</typeparam>
     /// <param name="cmdText">存储过程名</param>
     /// <param name="listpar">参数列表</param>
     /// <param name="connString">连接字符串</param>
     /// <returns></returns>
     public static IList<T> ToListAsPager<T>(string cmdText, List<DbParameter> listpar, string connString) where T : class, new()
     {
         listpar[listpar.Count-].Direction = ParameterDirection.Output;
         using (var read = DbHelp.Create().ExecuteDataReader(cmdText, listpar, connString))
         {
             List<T> list = null;
             var type = typeof(T);
             if (read.HasRows)
             {

                 list = new List<T>();
             }
             while (read.Read())
             {
                 T t = new T();
                 foreach (PropertyInfo item in type.GetProperties())
                 {
                     for (int i = ; i < read.FieldCount; i++)
                     {
                         //属性名与查询出来的列名比较
                         if (item.Name.ToLower() != read.GetName(i).ToLower()) continue;
                         object value = read[i];
                         if (value != DBNull.Value)
                         {
                             item.SetValue(t, value, null);
                         }
                         break;
                     }
                 }
                 //将创建的对象添加到集合中
                 list.Add(t);
             }
             return list;
         }
     }
     #endregion

     #region T FirstOrDefault<T>(string cmdText, string connString)
     /// <summary>
     /// 返回一个实体模型
     /// </summary>
     /// <typeparam name="T">实体模型</typeparam>
     /// <param name="cmdText">存储过程名</param>
     /// <param name="connString">连接字符串</param>
     /// <returns></returns>
     public static T FirstOrDefault<T>(string cmdText, string connString) where T : class,new()
     {
         using (var read = DbHelp.Create().ExecuteDataReader(cmdText, connString))
         {

             Type type = typeof(T);

             if (!read.Read()) return null;
             T t = new T();
             foreach (PropertyInfo item in type.GetProperties())
             {
                 for (int i = ; i < read.FieldCount; i++)
                 {
                     //属性名与查询出来的列名比较
                     if (item.Name.ToLower() != read.GetName(i).ToLower()) continue;
                     object value = read[i];
                     if (value != DBNull.Value)
                     {
                         item.SetValue(t, value, null);
                     }
                     break;
                 }

             }
             return t;
         }
     }
     #endregion

     #region T FirstOrDefault<T>(string cmdText, List<DbParameter> list, string connString)
     /// <summary>
     /// 返回一个实体
     /// </summary>
     /// <typeparam name="T">实体模型</typeparam>
     /// <param name="cmdText">存储过程名称</param>
     /// <param name="ob">object[]</param>
     /// <param name="connString">连接字符串</param>
     /// <returns></returns>
     public static T FirstOrDefault<T>(string cmdText, List<DbParameter> list, string connString) where T : class,new()
     {
         using (var read = DbHelp.Create().ExecuteDataReader(cmdText, list, connString))
         {
             var type = typeof(T);
             if (!read.Read()) return null;
             var t = new T();
             foreach (var item in type.GetProperties())
             {
                 for (var i = ; i < read.FieldCount; i++)
                 {
                     //属性名与查询出来的列名比较
                     if (item.Name.ToLower() != read.GetName(i).ToLower()) continue;
                     var value = read[i];
                     if (value != DBNull.Value)
                     {
                         item.SetValue(t, value, null);
                     }
                     break;
                 }
             }
             return t;
         }
     }
     #endregion

 }

QueryHelp