DataContractSerializer的抽象（基地）/混凝土（继承）班 [英] DataContractSerializer with abstract (base) / concrete (inheriting) classes

问题描述

鉴于这种code

public override void Serialize(BaseContentObject obj)
{
    string file = ObjectDataStoreFolder + obj.Slug + ".xml";
    if(obj.GetType() == typeof(Page))
    {
        DataContractSerializer dcs = new DataContractSerializer(typeof Page));
        XmlDictionaryWriter myWriter =
            XmlDictionaryWriter.CreateTextWriter(new FileStream(file, ileMode.CreateNew, FileAccess.Write),
                                             Encoding.UTF8);
        dcs.WriteObject(myWriter, obj);
        myWriter.Close();
    }
    else if(obj.GetType() == typeof(Image))
    {
        DataContractSerializer dcs = new DataContractSerializer(typeof Image));
        ...
        ...
    }
}

有没有办法做这样的事情

is there a way to do something like this

DataContractSerializer dcs = new DataContractSerializer(obj.GetType());
// this fails however, compiler error

和摆脱那些如果（）上面的语句？的DataContractSerializer的构造函数有期望类型或命名空间，但它不与obj.GetType（）工作。

and get rid of those if() statements above? The constructor of DataContractSerializer there expects Type or Namespace but it does not work with obj.GetType().

我的类层次结构如下：

BaseContentClass（摘要）

BaseContentClass (abstract)

页（混凝土，继承BaseContentClass）

Page (concrete, inherits BaseContentClass)

图片（混凝土，继承BaseContentClass）

Image (concrete, inherits BaseContentClass)

...

推荐答案

如果你正在谈论这个的的DataContractSerializer 的那么下面code编译罚款：

If you are talking about this DataContractSerializer then the following code will compile fine:

DataContractSerializer dcs = new DataContractSerializer(obj.GetType());

由于构造函数需要一个类型参数。

As the constructor expects a type parameter.

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