c# - 实现文件上传的 MVP 模式

Question

我是 MVP 模式的新手。我不太清楚在哪里编写将文件上传到服务器的逻辑，然后在上传后执行一些验证步骤和数据库操作。请指教。

public interface IPresenter
{
    void UploadFile(string fileName); //For simplicity, file name is passed;
                                      //it can be declared as a property  
}    

public interface IDefaultView
{
     void Upload();
}

public class DefaultPresenter : IPresenter
{
     protected DefaultPresenter() {}

     public DefaultPresenter(IDefaultView defaultview)
     {
        this.defaultView = defaultView;
     }

     public void UploadFile(string fileName)
     {
         //Do I need to write saving functionality here or call
         //defaultView.Upload(fileName)?
         //
         //From online articles, I have seen all business functionality written here.
         //But I think I will not be able to use System.Web in this layer.
     }
}

public partial class UploadExtract: IDefaultView    
{
    public void Upload(fileName)
    {                
    }
}

Answer 1

您将无法在业务逻辑中使用 System.Web。而且，事实上，您不应该这样做。

您可以编写您的 Controller 以接受来自客户端的文件并将其保存在本地服务器中的某个位置。然后，将文件名传递给您的业务逻辑层以进行进一步处理。

你的后续问题:

Q. I am reading the file into a memory stream. Is it advisable to pass the memory stream to the presenter, perform the business logic in the presenter, and finally set the file upload status in view?

是的，这也有效:传递流而不是文件名。