private static IDataLayer GetDataLayer()
{
XpoDefault.Session = null;
string conn = AccessConnectionProvider.GetConnectionString(@"|DataDirectory|\db.mdb");
XPDictionary dict = new DevExpress.Xpo.Metadata.ReflectionDictionary();
IDataStore store = XpoDefault.GetConnectionProvider(conn, AutoCreateOption.SchemaAlreadyExists);
dict.GetDataStoreSchema(typeof(Order).Assembly); // <<< initialize the XPO dictionary
IDataLayer dl = new ThreadSafeDataLayer(dict, store);
return(dl);
}
static ThreadSafeDataLayer CreateThreadSafeDataLayer(SqlConnection conn)
{
XPDictionary dict = new DevExpress.Xpo.Metadata.ReflectionDictionary();
IDataStore store = XpoDefault.GetConnectionProvider(conn, AutoCreateOption.SchemaAlreadyExists);
//注意：如果项目中的XPO对象不是集中在一个类库而是分散在多个类库的话，我们需要在这里从每一个
// 类库中都任意抓取一个对象作为参数传递给 GetDataStoreSchema 方法
dict.GetDataStoreSchema(
typeof(Hwagain.Components.BaseData).Assembly,
typeof(YiKang.RBACS.AccessService).Assembly
);
return(new ThreadSafeDataLayer(dict, store));
}
public static void Connect(DevExpress.Xpo.DB.AutoCreateOption autoCreateOption, bool threadSafe = false)
{
if (threadSafe)
{
var provider = XpoDefault.GetConnectionProvider(ConnectionString, autoCreateOption);
var dictionary = new DevExpress.Xpo.Metadata.ReflectionDictionary();
dictionary.GetDataStoreSchema(persistentTypes);
XpoDefault.DataLayer = new ThreadSafeDataLayer(dictionary, provider);
}
else
{
XpoDefault.DataLayer = XpoDefault.GetDataLayer(ConnectionString, autoCreateOption);
}
XpoDefault.Session = null;
}
public static void Connect(IConfiguration configuration, DevExpress.Xpo.DB.AutoCreateOption autoCreateOption, bool threadSafe = false)
{
if (threadSafe)
{
var provider = GetConnectionProvider(configuration, autoCreateOption);
var dictionary = new DevExpress.Xpo.Metadata.ReflectionDictionary();
dictionary.GetDataStoreSchema(persistentTypes);
dictionary.CollectClassInfos(nonPersistentTypes);
XpoDefault.DataLayer = new ThreadSafeDataLayer(dictionary, provider);
}
else
{
var provider = new OrmCookbookProvider(new SqlConnection(configuration.GetConnectionString(ConnectionStringName)), autoCreateOption);
XpoDefault.DataLayer = new SimpleDataLayer(provider);
}
}
