/// <summary>
/// 执行查询SQL,返回列表object
/// 前置条件: 必须是映射的SQL语句,且必须指定SQL语句的返回参数类
/// </summary>
/// <param name="sqlName"></param>
/// <param name="pageSize"></param>
/// <param name="curPage"></param>
/// <param name="paramValues"></param>
/// <returns></returns>
public List <T> ExecuteListObject <T>(string sqlName, int pageSize, int curPage, params object[] paramValues)
{
int i;
int recordStart = 0;
int recordEnd = 0;
List <T> objs = new List <T>();
T obj;
IDataReader idr = null;
Type returnClass = null;
// 如果未指定SQL语句的返回参数类, 将抛出异常
returnClass = SqlMap.GetSqlReturnClass(sqlName);
if (returnClass == null)
{
throw new Exception(string.Format("未指定SQL语句的返回参数类异常:{0}", sqlName));
}
// 计算获取的记录编号范围(当前页)
CalcRecordRange(pageSize, curPage, ref recordStart, ref recordEnd);
try
{
// 执行查询
string sql = SqlMap.GetSql(_isql, sqlName, paramValues);
idr = _db.ExecuteReaderBySql(sql);
// 获取指定范围的数据
i = 0;
while (idr.Read())
{
i++;
if (i < recordStart)
{
}
else if (i <= recordEnd)
{
obj = (T)ReflectUtil.CreateInstance(returnClass);
for (int j = 0; j < idr.FieldCount; j++)
{
ReflectUtil.SetPropertyValue(obj, idr.GetName(j), idr.GetValue(j));
}
objs.Add(obj);
}
else //if (i > recordEnd)
{
break;
}
}
}
finally
{
if (idr != null)
{
idr.Close();
}
}
return(objs);
}
/// <summary>
/// 执行查询SQL,返回列表object
/// </summary>
/// <param name="sql"></param>
/// <param name="pageSize"></param>
/// <param name="curPage"></param>
/// <param name="returnClass">不能为null</param>
/// <returns></returns>
public List <T> ExecuteListObjectByType <T>(string sql, int pageSize, int curPage, Type returnClass)
{
int i;
int recordStart = 0;
int recordEnd = 0;
List <T> objs = new List <T>();
T obj;
IDataReader idr = null;
// 计算获取的记录编号范围(当前页)
CalcRecordRange(pageSize, curPage, ref recordStart, ref recordEnd);
try
{
// 执行查询
idr = _db.ExecuteReaderBySql(sql);
// 获取指定范围的数据
i = 0;
while (idr.Read())
{
i++;
if (i < recordStart)
{
}
else if (i <= recordEnd)
{
obj = (T)ReflectUtil.CreateInstance(returnClass);
for (int j = 0; j < idr.FieldCount; j++)
{
ReflectUtil.SetPropertyValue(obj, idr.GetName(j), idr.GetValue(j));
}
objs.Add(obj);
}
else // (i > reocrdEnd)
{
break;
}
}
}
finally
{
if (idr != null)
{
idr.Close();
}
}
return(objs);
}
/// <summary>
/// 执行查询SQL,返回列表object
/// </summary>
/// <param name="sql"></param>
/// <param name="pageSize"></param>
/// <param name="curPage"></param>
/// <param name="returnClass">不能为null</param>
/// <returns></returns>
public PageList <T> ExecutePageListObjectByType <T>(string sql, string orderKey, int pageSize, int curPage, Type returnClass)
{
PageList <T> objs = new PageList <T>();
T obj;
IDataReader idr = null;
// 计算获取的记录编号范围(当前页)
objs.SetPage(pageSize, curPage);
try
{
// 获取总记录数
if (pageSize != -1)
{
objs.TotalCount = ParamUtil.getint(_db.ExecuteScalarBySql(_isql.CountSql(sql)));
}
string pageSql = _isql.PageSql(sql, orderKey, objs.StartRecord, objs.EndRecord);
// 执行查询
idr = _db.ExecuteReaderBySql(pageSql);
// 获取指定范围的数据
while (idr.Read())
{
obj = (T)ReflectUtil.CreateInstance(returnClass);
// 第一列为COL_ROWNUM(记录号),不设置属性值
for (int i = 1; i < idr.FieldCount; i++)
{
ReflectUtil.SetPropertyValue(obj, idr.GetName(i), idr.GetValue(i));
}
objs.Add(obj);
}
// 如果未分页，则设置总数为当前页记录数
if (pageSize == -1)
{
objs.TotalCount = objs.CurPageCount;
}
}
finally
{
if (idr != null)
{
idr.Close();
}
}
return(objs);
}
