public static List <T> ReaderToObjectList <T>(DbDataReader reader)
{
if (!reader.HasRows)
{
return(new List <T>());
}
var type = typeof(T);
List <T> list = new List <T>();
var first = true;
Tuple <PropertyInfo, Delegate>[] tupleArr = new Tuple <PropertyInfo, Delegate> [reader.FieldCount];
string[] nameArr = new string[reader.FieldCount];
while (reader.Read())
{
T obj = Activator.CreateInstance <T>();
for (int i = 0; i < reader.FieldCount; i++)
{
Tuple <PropertyInfo, Delegate> tuple = null;
string fieldName = null;
if (first)
{
tuple = ReflectionCache.GetCachedPP <T>(type, fieldName);
tupleArr[i] = tuple;
fieldName = reader.GetName(i);
nameArr[i] = fieldName;
}
else
{
tuple = tupleArr[i];
fieldName = nameArr[i];
}
if (tuple != null)
{
var value = reader.GetValue(i);
if (value == null || value is DBNull)
{
continue;
}
SetPropertyValue(tuple, type, obj, fieldName, value);
}
}
list.Add(obj);
first = false;
}
return(list);
}
/// <summary>
/// 用reader填充T类型的对象，并返回
/// </summary>
/// <typeparam name="T">类型参数</typeparam>
/// <param name="reader">dataReader</param>
/// <returns></returns>
public static T ReaderToObject <T>(DbDataReader reader)
{
if (reader.Read())
{
T obj = Activator.CreateInstance <T>();
var type = typeof(T);
for (int i = 0; i < reader.FieldCount; i++)
{
var tuple = ReflectionCache.GetCachedPP <T>(type, reader.GetName(i));
SetPropertyValue(tuple, type, obj, reader.GetName(i), reader.GetValue(i));
}
return(obj);
}
else
{
return(default(T));
}
}