/// <summary>
/// 执行SQL 查询,返回集合
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="page">页数</param>
/// <param name="itemsPerPage">每页数量</param>
/// <param name="columnSql">查询列 SQL语句</param>
/// <param name="tableSql">TABLE SQL语句</param>
/// <param name="orderSql">ORDER BY SQL语句</param>
/// <param name="whereSql">WHERE SQL语句</param>
/// <param name="args">SQL 参数</param>
/// <returns></returns>
public List <T> SelectSql <T>(long page, long itemsPerPage, string columnSql, string tableSql, string orderSql, string whereSql, params object[] args)
{
if (string.IsNullOrWhiteSpace(columnSql))
{
throw new ArgumentNullException("columnSql is null.");
}
if (string.IsNullOrWhiteSpace(tableSql))
{
throw new ArgumentNullException("tableSql is null.");
}
if (page <= 0)
{
page = 1;
}
if (itemsPerPage <= 0)
{
itemsPerPage = 20;
}
#region 格式化
columnSql = columnSql.Trim();
tableSql = tableSql.Trim();
orderSql = orderSql?.Trim();
whereSql = whereSql?.Trim();
if (columnSql.StartsWith("SELECT ", StringComparison.InvariantCultureIgnoreCase))
{
columnSql = columnSql.Substring(7);
}
if (tableSql.StartsWith("FROM ", StringComparison.InvariantCultureIgnoreCase))
{
tableSql = tableSql.Substring(5);
}
if (orderSql?.StartsWith("ORDER BY ", StringComparison.InvariantCultureIgnoreCase) ?? false)
{
orderSql = orderSql.Substring(9);
}
if (whereSql?.StartsWith("WHERE ", StringComparison.InvariantCultureIgnoreCase) ?? false)
{
whereSql = whereSql.Substring(6);
}
#endregion
var sql = _provider.CreateSql((int)itemsPerPage, (int)((Math.Max(0, page - 1)) * itemsPerPage), columnSql, tableSql, orderSql, whereSql);
sql = formatSql(sql);
if (_usedCacheServiceOnce)
{
return(Run <List <T> >(sql, args, () => {
return getDatabase().Query <T>(sql, args).ToList();
}, "Select"));
}
return(getDatabase().Query <T>(sql, args).ToList());
}