public static PagedResult <T> PagedQuery <T>(this IDbConnection db, int pageSize, int pageNumber, Expression <Func <T, bool> > whereExpression = null, Expression <Func <T, object> > groupByexpression = null, params Expression <Func <T, object> >[] orderbyExpressions)
where T : class
{
var sqllam = new SqlLam <T>(db.GetAdapter());
var countSqlam = new SqlLam <T>(db.GetAdapter());
if (whereExpression != null)
{
sqllam = sqllam.Where(whereExpression);
countSqlam = countSqlam.Where(whereExpression);
}
if (orderbyExpressions != null && orderbyExpressions.Length > 0)
{
sqllam = sqllam.OrderBy(orderbyExpressions);
}
if (groupByexpression != null)
{
sqllam = sqllam.GroupBy(groupByexpression);
}
countSqlam = countSqlam.Count();
var countRet = db.Query <int>(countSqlam.SqlString, countSqlam.Parameters).FirstOrDefault();
//var sqlString = sqllam.SqlString;
//var param = sqllam.Parameters;
//string parameterString = GetParameterString(sqllam.Parameters);
var sqlstring = sqllam.QueryPage(pageSize, pageNumber);
var retlist = db.Query <T>(sqlstring, sqllam.Parameters);
return(new PagedResult <T>(retlist, countRet, pageSize, pageNumber));
}