/// <summary>
/// 获取IDataReader转Entity委托方法
/// </summary>
/// <param name="reader"></param>
/// <returns></returns>
public DataReaderDeserializer GetDataReaderDeserializer(System.Data.IDataReader reader)
{
if (deserializer == null)
{
deserializer = TypeDeserializerEmit.CreateDataReaderDeserializer(this, reader);
}
return(deserializer);
}
public static TReturn QueryFirst <TReturn>(DbDataReader reader, DataReaderDeserializer dataReaderDeserializer)
{
if (reader.Read() == false)
{
ThrowException.SequenceContainsNoElements();
}
return(dataReaderDeserializer.Deserialize <TReturn>(reader));
}
protected TEntity protectedFirstOrDefault(IDataProvider dataProvider)
{
TEntity obj = null;
SqlStatement sqlStatement = DbSqlFactories.BuildSelectSqlStatement(dataProvider.DatabaseContext.DbTranslator, this.entityInfo, whereExpr, order);
dataProvider.ExecuteReader(sqlStatement, delegate(IDataReader dr)
{
while (dr.Read())
{
DataReaderDeserializer deserializer = entityInfo.GetDataReaderDeserializer(dr);
obj = (TEntity)deserializer(dr);
break;
}
});
return(obj);
}
protected IList <TEntity> protectedSelect(IDataProvider dataProvider)
{
var ret = new System.ComponentModel.BindingList <TEntity>();
SqlStatement sqlStatement = DbSqlFactories.BuildSelectSqlStatement(dataProvider.DatabaseContext.DbTranslator,
this.entityInfo, whereExpr, range, order);
dataProvider.ExecuteReader(sqlStatement, delegate(IDataReader dr)
{
while (dr.Read())
{
DataReaderDeserializer deserializer = entityInfo.GetDataReaderDeserializer(dr);
do
{
ret.Add((TEntity)deserializer(dr));
}while (dr.Read());
}
});
return(ret);
}
public static TReturn QueryFirstOrDefault <TReturn>(DbDataReader reader, DataReaderDeserializer dataReaderDeserializer)
{
if (reader.Read() == false)
{
return(default);
