/// <summary>
/// emit转换实体
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="dr"></param>
/// <returns></returns>
public static List <T> ToEntityList <T>(this IDataReader dr)
{
List <T> list = new List <T>();
LoadDataRecord <T> load = null;
if (IsCache)
{
load = FindDataRecordMethod <T>(dr);
}
if (load == null)
{
var properties = typeof(T).GetProperties(BindingFlags.GetProperty | BindingFlags.Public | BindingFlags.Instance | BindingFlags.IgnoreCase);
var mapColumns = CheckProperty(dr, properties);
if (IsCache)
{
load = CreateDataRecordMethod <T>(dr, mapColumns);
}
else
{
load = CreateDataRecordMethod <T>(null, mapColumns);
}
}
while (dr.Read())
{
list.Add(load(dr));
}
return(list);
}
/// <summary>
/// 转行实体
/// </summary>
/// <param name="dr">DataReader</param>
/// <param name="type">实体类型</param>
/// <param name="key">缓存Key</param>
/// <param name="ignore">忽略属性大小写，默认忽略</param>
/// <returns></returns>
public static List <object> ToEntityList(this IDataReader dr, Type type, string key = null, bool ignore = true)
{
List <object> list = new List <object>();
LoadDataRecord <object> load = null;
if (IsCache)
{
load = FindObjectDataRecordMethod(dr, type, key);
}
if (load == null)
{
var properties = type.GetProperties(BindingFlags.GetProperty | BindingFlags.Public | BindingFlags.Instance | BindingFlags.IgnoreCase);
var mapColumns = CheckProperty(dr, properties, ignore);
if (IsCache)
{
load = CreateDataRecordMethod(dr, mapColumns, type, key);
}
else
{
load = CreateDataRecordMethod(null, mapColumns, type, key);
}
}
while (dr.Read())
{
list.Add(load(dr));
}
return(list);
}
/// <summary>
/// 从Dictionary获取委托 LoadDataRecord<T>的方法实例，没有则调用BuildMethod构造一个。
/// </summary>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
private static LoadDataRecord <T> GetDataRecordMethod <T>()
{
string key = dataRecordAssembly.MethodName + typeof(T).Name;
LoadDataRecord <T> load = null;
load = (LoadDataRecord <T>)BuildMethod <T>(dataRecordAssembly).CreateDelegate(typeof(LoadDataRecord <T>));
return(load);
}
public static List <T> ToList <T>(IDataReader dr)
{
List <T> list = new List <T>();
LoadDataRecord <T> load = GetDataRecordMethod <T>();
while (dr.Read())
{
list.Add(load(dr));
}
return(list);
}
private static LoadDataRecord <object> CreateDataRecordMethod(IDataReader reader, MapColumn[] mapColumns, Type type, string key = null)
{
if (reader != null && string.IsNullOrEmpty(key))
{
key = reader.FieldCount + "_" + dataRecordAssembly.MethodName + type.FullName;
}
LoadDataRecord <object> load = (LoadDataRecord <object>)BuildMethod(dataRecordAssembly, type, mapColumns, key).CreateDelegate(typeof(LoadDataRecord <object>));
if (key != null)
{
ConvertCache <string, object> .Singleton.Set(key, load);
}
return(load);
}
/// <summary>
/// 查找DataRecord转换
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="reader"></param>
/// <returns></returns>
private static LoadDataRecord <T> FindDataRecordMethod <T>(IDataReader reader, string key = null)
{
if (string.IsNullOrEmpty(key))
{
key = reader.FieldCount + "_" + dataRecordAssembly.MethodName + typeof(T).FullName;
}
LoadDataRecord <T> load = null;
object v = null;
if (ConvertCache <string, object> .Singleton.TryGet(key, out v))
{
load = v as LoadDataRecord <T>;
}
return(load);
}
/// <summary>
/// 从Dictionary获取委托 LoadDataRecord<T>的方法实例，没有则调用BuildMethod构造一个。
/// </summary>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
private static LoadDataRecord <T> GetDataRecordMethod <T>()
{
string key = dataRecordAssembly.MethodName + typeof(T).Name;
LoadDataRecord <T> load = null;
if (HttpRuntime.Cache[key] == null)
{
load = (LoadDataRecord <T>)BuildMethod <T>(dataRecordAssembly).CreateDelegate(typeof(LoadDataRecord <T>));
HttpRuntime.Cache[key] = load;
}
else
{
load = HttpRuntime.Cache[key] as LoadDataRecord <T>;
}
return(load);
}
/// <summary>
/// 查找DataRecord转换
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="reader"></param>
/// <returns></returns>
private static LoadDataRecord <T> FindDataRecordMethod <T>(IDataReader reader)
{
string key = reader.FieldCount + "_";
for (int i = 0; i < reader.FieldCount; i++)
{
key = key + reader.GetName(i) + "_";
}
key = key + dataRecordAssembly.MethodName + typeof(T).FullName;
LoadDataRecord <T> load = null;
object v = null;
if (ConvertCache <string, object> .Singleton.TryGet(key, out v))
{
load = v as LoadDataRecord <T>;
}
return(load);
}
/// <summary>
/// 从Cache获取委托 LoadDataRecord<T>的方法实例，没有则调用BuildMethod构造一个。
/// </summary>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
private static LoadDataRecord <T> GetDataRecordMethod <T>()
{
string key = dataRecordAssembly.MethodName + typeof(T).Name;
LoadDataRecord <T> load = null;
if (Cache == null)
{
Cache = new Dictionary <string, object>();
}
if (!Cache.ContainsKey(key))
{
load = (LoadDataRecord <T>)BuildMethod <T>(dataRecordAssembly).CreateDelegate(typeof(LoadDataRecord <T>));
Cache.Add(key, load);
}
else
{
load = Cache[key] as LoadDataRecord <T>;
}
return(load);
}
/// <summary>
/// 创建DataRecord转换
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="reader"></param>
/// <param name="mapColumns"></param>
/// <returns></returns>
private static LoadDataRecord <T> CreateDataRecordMethod <T>(IDataReader reader, MapColumn[] mapColumns)
{
string key = null;
if (reader != null)
{
key = reader.FieldCount + "_";
for (int i = 0; i < reader.FieldCount; i++)
{
key = key + reader.GetName(i) + "_";
}
key = key + dataRecordAssembly.MethodName + typeof(T).FullName;
}
LoadDataRecord <T> load = (LoadDataRecord <T>)BuildMethod <T>(dataRecordAssembly, mapColumns, key).CreateDelegate(typeof(LoadDataRecord <T>));
if (key != null)
{
ConvertCache <string, object> .Singleton.Set(key, load);
}
return(load);
}
