static void Main(string[] args)
{
Console.WriteLine("Press any key to drop Database");
Console.Read();
System.Data.Entity.Database.SetInitializer<Context>(new ContextDropDBInitializer());
//System.Data.Entity.Database.SetInitializer<Context>(null);
Context db = new Context();
var query = (from o in db.SystemUsers select o).ToList();
db.Dispose();
ImportData import = new ImportData();
string filename = "历史客户.xlsx";
//import.Fun1(filename);
Console.WriteLine("Press any key to Exit");
Console.Read();
}