public T ToSingle(DataRow row)
{
EntityDescription description = EntityDescriptionCache.Get(typeof(T));
DataTable table = row.Table;
return(GetSingle(row, description, table));
}
public List <T> ToList(DataTable table)
{
EntityDescription description = EntityDescriptionCache.Get(typeof(T));
List <T> list = new List <T>(Initializer.Instance.DefaultEntityListLen);
foreach (DataRow row in table.Rows)
{
T instance = GetSingle(row, description, table);
list.Add(instance);
}
return(list);
}
private List <T> ToList(DbDataReader reader, EntityDescription description)
{
List <T> list = new List <T>(Initializer.Instance.DefaultEntityListLen);
string[] names = DataExtensions.GetColumnNames(reader);
while (reader.Read())
{
T instance = GetSingle(reader, description, names);
list.Add(instance);
}
return(list);
}
public T ToSingle(DbDataReader reader)
{
if (reader.Read())
{
EntityDescription description = EntityDescriptionCache.Get(typeof(T));
string[] names = DataExtensions.GetColumnNames(reader);
return(GetSingle(reader, description, names));
}
else
{
return(default(T));
}
}
public static EntityDescription Get(Type entityType)
{
// 先尝试从缓存中获取
EntityDescription description = s_typeInfoDict[entityType.FullName] as EntityDescription;
if (description == null)
{
// 创建类型的描述对象
description = Create(entityType, true);
// 添加到缓存字典
s_typeInfoDict[entityType.FullName] = description;
}
return(description);
}
private T GetSingle(DbDataReader reader, EntityDescription description, string[] names)
{
T instance = (T)typeof(T).FastNew();
for (int i = 0; i < names.Length; i++)
{
string name = names[i];
ColumnInfo info;
if (description.MemberDict.TryGetValue(name, out info))
{
object val = reader.GetValue(i);
SetPropertyValue(info, instance, val, name);
}
}
return(instance);
}
private T GetSingle(DataRow row, EntityDescription description, DataTable table)
{
T instance = (T)typeof(T).FastNew();
for (int i = 0; i < table.Columns.Count; i++)
{
string name = table.Columns[i].ColumnName;
ColumnInfo info;
if (description.MemberDict.TryGetValue(name, out info))
{
object val = row[i];
SetPropertyValue(info, instance, val, name);
}
}
return(instance);
}
public List <T> ToList(DbDataReader reader)
{
EntityDescription description = EntityDescriptionCache.Get(typeof(T));
return(ToList(reader, description));
}
