/// <summary>
/// 查询
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="sql"></param>
/// <param name="args"></param>
/// <returns></returns>
public List <T> FetchOrDefault <T>(string sql, params object[] args)
{
T t = Activator.CreateInstance <T>();
List <T> list = new DataBaseAuxiliary(connectionString).DataReaderMultiple(t, sql, args).ToList();
return(list);
}
/// <summary>
/// 查询
/// </summary>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
public List <T> FetchOrDefault <T>()
{
T t = Activator.CreateInstance <T>();
string sql = DataBaseAuxiliary.Current.SelectSQL(t, SqlQueryTypeEnum.FetchOrDefault);
List <T> list = new DataBaseAuxiliary(connectionString).DataReaderMultiple(t, sql).ToList();
return(list);
}
/// <summary>
/// 分页-SQL server 2012 以下版本用
/// </summary>
/// <typeparam name="T">实体</typeparam>
/// <param name="CurrentPage">当前页</param>
/// <param name="PageSize">每页条数</param>
/// <param name="sql">sql语句</param>
/// <param name="args">参数</param>
/// <returns></returns>
private Page <T> PageOrDefaultForOld <T>(int CurrentPage, int PageSize, string sql, params object[] args)
{
T t = Activator.CreateInstance <T>();
int count = Convert.ToInt32(CountOrDefault <T>(sql, args));
var list = new DataBaseAuxiliary(connectionString).DataReaderMultiple(t, sql, args).Skip((CurrentPage - 1) * PageSize).Take(PageSize).ToList();
var result = new Page <T>
{
PageIndex = CurrentPage,
PageSize = PageSize,
TotalItems = count,
};
result.TotalPages = result.TotalItems / PageSize;
if ((result.TotalItems % PageSize) != 0)
{
result.TotalPages++;
}
result.Items = list;
return(result);
}
/// <summary>
/// 分页-SQL server 2012 以上版本用
/// </summary>
/// <typeparam name="T">实体</typeparam>
/// <param name="CurrentPage">当前页</param>
/// <param name="PageSize">每页条数</param>
/// <param name="sql">sql语句</param>
/// <param name="args">参数</param>
/// <returns></returns>
private Page <T> PageOrDefaultForNew <T>(int CurrentPage, int PageSize, string sql, params object[] args)
{
T t = Activator.CreateInstance <T>();
int count = Convert.ToInt32(CountOrDefault <T>(sql, args));
sql = $@"{sql} OFFSET (({CurrentPage}-1)*{PageSize}) ROWS FETCH NEXT {PageSize} ROWS ONLY;";
var list = new DataBaseAuxiliary(connectionString).DataReaderMultiple(t, sql).ToList();
var result = new Page <T>
{
PageIndex = CurrentPage,
PageSize = PageSize,
TotalItems = count,
};
result.TotalPages = result.TotalItems / PageSize;
if ((result.TotalItems % PageSize) != 0)
{
result.TotalPages++;
}
result.Items = list;
return(result);
}