/// <summary>
/// Finds the page.
/// </summary>
/// <param name="pageNo">The page no.</param>
/// <returns>The result.</returns>
public EntityType[] FindPage(int pageNo)
{
Check.Require(pageNo > 0, "pageNo must > 0.");
EntityConfiguration ec = new EntityType().GetEntityConfiguration();
string cacheKey = null;
if (gateway.IsCacheTurnedOn && ec.IsAutoPreLoad)
{
cacheKey = gateway.ComputeCacheKey(typeof(EntityType).ToString() + "|PreLoad", new WhereClip(string.Empty));
if (Gateway.cache.Get(cacheKey) == null)
{
gateway.PreLoadEntities <EntityType>(ec);
}
DataTable dt = (DataTable)gateway.GetCache(cacheKey);
if (dt == null)
{
gateway.PreLoadEntities <EntityType>(ec);
dt = (DataTable)gateway.GetCache(cacheKey);
}
if (dt != null)
{
DataRow[] rows;
if (string.IsNullOrEmpty(ps.Where) && string.IsNullOrEmpty(ps.OrderBy))
{
rows = dt.Select();
}
else if (string.IsNullOrEmpty(ps.Where))
{
rows = dt.Select(null, ps.OrderBy);
}
else if (string.IsNullOrEmpty(ps.OrderBy))
{
rows = dt.Select(gateway.ToFlatWhereClip(new WhereClip(ps.Where, ps.ParamValues), ec).ToString());
}
else
{
rows = dt.Select(gateway.ToFlatWhereClip(new WhereClip(ps.Where, ps.ParamValues), ec).ToString(), ps.OrderBy);
}
if (rows != null && rows.Length > 0)
{
List <DataRow> pageList = new List <DataRow>();
for (int i = (pageNo - 1) * PageSize; i < rows.Length && i < pageNo * PageSize; i++)
{
pageList.Add(rows[i]);
}
rows = pageList.ToArray();
List <EntityType> list = new List <EntityType>();
foreach (DataRow row in rows)
{
EntityType retObj = gateway.CreateEntity <EntityType>();
retObj.SetPropertyValues(row);
list.Add(retObj);
}
return(list.ToArray());
}
}
return(new EntityType[0]);
}
if (gateway.IsCacheTurnedOn && gateway.GetTableCacheExpireSeconds(ec.ViewName) > 0)
{
PageSplit pageSplit = (PageSplit)ps;
cacheKey = gateway.ComputeCacheKey(typeof(EntityType).ToString() + "|FindPage_" + pageNo.ToString(), new WhereClip(pageNo == 1 ? pageSplit._PageSplitableSelectStatementForFirstPage : pageSplit._PageSplitableSelectStatement, pageSplit.paramValues));
object cachedObj = gateway.GetCache(cacheKey);
if (cachedObj != null)
{
return((EntityType[])cachedObj);
}
}
IDataReader reader = ps.GetPageReadOnly(pageNo);
List <EntityType> objs = new List <EntityType>();
while (reader.Read())
{
EntityType obj = gateway.CreateEntity <EntityType>();
obj.SetPropertyValues(reader);
objs.Add(obj);
}
reader.Close();
reader.Dispose();
if (gateway.IsCacheTurnedOn && gateway.GetTableCacheExpireSeconds(ec.ViewName) > 0 && cacheKey != null)
{
gateway.AddCache(cacheKey, objs.ToArray(), gateway.GetTableCacheExpireSeconds(ec.ViewName));
}
return(objs.ToArray());
}
