/// <summary>
/// 在一次请求中只创建一个EF上下文实例
/// </summary>
/// <returns></returns>
public static DbContext CreateDbContext()
{
DbContext dbContext = (DbContext)CallContext.GetData("dbContext");
if (dbContext == null)
{
dbContext = new OAEntities1();
CallContext.SetData("dbContext", dbContext);
}
return(dbContext);
}
public static DbContext CreateDBContext()
{
//httpcontext通过callcontext来保证线程内唯一的 所以这里用httpcontext和callcontext一样
DbContext dbContext = (DbContext)CallContext.GetData("dbContext");
if (dbContext == null)
{
dbContext = new OAEntities1();
CallContext.SetData("dbContext", dbContext);
}
return(dbContext);
}
public static DbContext GetCurrentDbContext()
{
//一次请求共用一个实例,返回值用DbContext ，上下文也可以改变了
DbContext db = CallContext.GetData("DbContext") as DbContext;
if (db == null)
{
//创建实例
db = new OAEntities1();
CallContext.SetData("DbContext", db);
}
return(db);
}
