Question

您好我想知道这个例子是否有最佳实践代码或更简单的提示。所有类都是Choix的子类，但所有方法都在子类中重写。如果我尝试使用Choix Choix = new AddTenant但没有成功感谢您的任何进一步帮助/回答

string arguments = args[0].ToLower();
bool load;
bool lauch;
bool result;
switch (arguments)
{
case "AddTenant":
    AddTenant AddTenant = new AddTenant();
    load = AddTenant.Load();
    lauch = AddTenant.Lauch();
    result = AddTenant.Result();
    break;
case "BackupDb":
    BackupDb BackupDb = new BackupDb();
    load = BackupDb.Load();
    lauch = BackupDb.Lauch();
    result = BackupDb.Result();
    break;
case "ExtractTenant":
    ExtractTenant ExtractTenant = new ExtractTenant();
    load = ExtractTenant.Load();
    lauch = ExtractTenant.Lauch();
    result = ExtractTenant.Result();
    break;
case "InstallDb":
    InstallDb InstallDb = new InstallDb();
    load = InstallDb.Load();
    lauch = InstallDb.Lauch();
    result = InstallDb.Result();;
    break;
case "RestoreDb":
    RestoreDb RestoreDb = new RestoreDb();
    load = RestoreDb.Load();
    lauch = RestoreDb.Lauch();
    result = RestoreDb.Result();
    break;
case "UpgradeTenant":
    UpgradeTenant UpgradeTenant = new UpgradeTenant();
    load = UpgradeTenant.Load();
    lauch = UpgradeTenant.Lauch();
    result = UpgradeTenant.Result();
    break;
default:
    Help Help = new Help();
    load = Help.Load();
    lauch = Help.Lauch();
    result = Help.Result();
    break;
}
Console.WriteLine(load+" "+lauch+" "+result);

Answer 1

如果这些类是Choix的子类，并且方法被正确覆盖，那么您的建议应该起作用：

string arguments = args[0].ToLower();

Choix choix;
switch (arguments)
{
    case "AddTenant":
        choix = new AddTenant();
        break;
    case "BackupDb":
        choix = new BackupDb();
        break;
    case "ExtractTenant":
        choix = new ExtractTenant();
        break;
    case "InstallDb":
        choix = new InstallDb();
        break;
    case "RestoreDb":
        choix = new RestoreDb();
        break;
    case "UpgradeTenant":
        choix = new UpgradeTenant();
        break;
    default:
        choix = new Help();
        break;
}

bool load = choix.Load();
bool lauch = choix.Lauch();
bool result = choix.Result();

Console.WriteLine(load + " " + lauch + " " + result);

这是您的课程应该如下所示的选项：

abstract class Choix
{
    public abstract bool Load();
    public abstract bool Lauch();
    public abstract bool Result();
}

class AddTenant : Choix
{
    public override bool Load()
    {
        // Load ...
        return true;
    }

    public override bool Lauch()
    {
        // Lauch ...
        return true;
    }

    public override bool Result()
    {
        // Result ...
        return true;
    }
}

优化同一父类的子类之间的切换

1 个答案: