c# - C# 中的静态抽象方法

Question

我知道静态抽象方法是同义反复，但我该怎么做:

基类，抽象类:

abstract class QTimerDatabaseObject {

    public static abstract QTimerDatabaseObject createFromQTimer(DataRow QTimerRow);
    public abstract void saveRow();
}

示例实现(在扩展 QTimerDatabaseObject 的用户类中):

    public static override QTimerDatabaseObject createFromQTimer(DataRow QTimerRow) {
        int ID = (int)QTimerRow["id"];

        string Username = QTimerRow["username"].ToString();
        string Init = (QTimerRow["init"] ?? "").ToString();
        string FirstName = (QTimerRow["FirstName"] ?? "").ToString();
        string MiddleInitial = (QTimerRow["Midinit"] ?? "").ToString();
        string LastName = (QTimerRow["Lastname"] ?? "").ToString();
        string Salutation = (QTimerRow["salutation"] ?? "").ToString();

        int RefNum = (int)(QTimerRow["refnum"] ?? -1);
        int Timestamp = (int)(QTimerRow["timestamp"] ?? -1);
        int DelCount = (int)(QTimerRow["delcount"] ?? 0);

        bool IsHidden = (bool)(QTimerRow["hidden"] ?? false);

        return new User(ID, Username, Init, FirstName, MiddleInitial, LastName, Salutation, RefNum, Timestamp, DelCount, IsHidden);
    }

我怎样才能做这样的事情？

Answer 1

我想你想要的是 Factory Design Pattern .