Question

我对C＃还是很陌生，这很可能是我的方法完全不适合...我正在尝试建立一个类，该类是另一个类型的容器，该类型可以在派生类中扩展。基本上，我当前的代码如下所示：

public class BaseFormFields
{
   public String baseFieldName1 {get; set;}

}
public abstract class BaseOrder<F> where F : BaseFormFields
{
   public String orderProperty1 {get; set;}
   public F formFields { get; set; }
}

在派生类中

public class SpecificFormFields : BaseFormFields
{
   public String specificFieldNam1 {get; set;}
}
public class SpecificOrder : BaseOrder<SpecificFormFields>
{
}

虽然这基本上可以工作，但我如何需要在BaseFormFields或SpecificFormFields类中构造一个方法来从BaseOrder访问成员？我尝试过：

public class BaseFormFields
{
    public string BaseFieldName1 { get; set; }
    public Object _order;
    public BaseOrder<BaseFormFields> order
    {
        get
        {
            return (BaseOrder<BaseFormFields>)_order;
        }
    }
}
public abstract class BaseOrder<F> where F : BaseFormFields
{
    public String orderProperty1 { get; set; }
    private F _formFields;
    public F formFields
    {
        get
        {
            return _formFields;
        }
        set
        {
            value._order = this;
            _formFields = value;

        }
    }
}

public class SpecificFormFields : BaseFormFields
{
    public String SpecificFieldName1 { get; set; }
    public String SpecificFieldName2
    {
        get
        {
            return order.orderProperty1;
        }
    }
}

public class SpecificOrder : BaseOrder<SpecificFormFields>
{

}

可以编译，但是在尝试执行操作时却给出了InvalidCastException

SpecificOrder specificOrder = new SpecificOrder();
specificOrder.orderProperty1 = "Test";
specificOrder.formFields = new SpecificFormFields();
String s = specificOrder.formFields.SpecificFieldName2;

感谢您的帮助...

C＃中的泛型类和继承

0 个答案: