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,
IDbTransaction trans = null, int?commandTimeout = null,
Expression <Func <T, object> > orderbyExpression = null)
where T : class
{
var sqllam = new SqlExp <T>(db.GetAdapter());
var countSqlam = new SqlExp <T>(db.GetAdapter());
if (whereExpression != null)
{
sqllam = sqllam.Where(whereExpression);
countSqlam = countSqlam.Where(whereExpression);
}
if (orderbyExpression != null)
{
sqllam = sqllam.OrderBy(orderbyExpression);
}
if (groupByexpression != null)
{
sqllam = sqllam.GroupBy(groupByexpression);
}
countSqlam = countSqlam.Count();
int countRet;
var sqlString = countSqlam.SqlString;
try {
DebuggingSqlString(sqlString);
countRet = db.Query <int>(sqlString, countSqlam.Parameters).FirstOrDefault();
}
catch (Exception ex)
{
DebuggingException(ex, sqlString);
throw new DapperLamException(ex.Message, ex, sqlString)
{
Parameters = countSqlam.Parameters
};
}
var sqlstring = sqllam.QueryPage(pageSize, pageNumber);
try
{
DebuggingSqlString(sqlstring);
var retlist = db.Query <T>(sqlstring, sqllam.Parameters, trans, commandTimeout: commandTimeout);
return(new PagedResult <T>(retlist, countRet, pageSize, pageNumber));
}
catch (Exception ex)
{
DebuggingException(ex, sqlstring);
throw new DapperLamException(ex.Message, ex, sqlstring)
{
Parameters = sqllam.Parameters
};
}
}
