3层业务到演示层错误 [英] 3 Tier Layer Business to Presenation Layer Error

问题描述

我有一家公司表示层.我正在尝试从表示层访问业务层中的方法.

I have a Business & Presentation Layer. I am trying to access a method in the Business Layer from the Presentation Layer.

// Presentation Layer Code
Grade grd = new Grade();
grd = Businesslayer.GetGradeID((int)gradeId);

等级是Class& GetGradeID是BusinessLayer中的方法.

我得到的错误是<<不能隐式将类型BusinessLayer.Grade转换为PresentationLayer.Grade>>< br/>
请提供任何帮助.

Grade is a Class & GetGradeID is the method in the BusinessLayer.

Error I am getting is <<Cannot Implicitly convert type BusinessLayer.Grade to PresentationLayer.Grade>>

Any help please.

推荐答案

我说对了吗，您是从您的Businesslayer中检索的吗?
这个成绩列表?
如果我是对的，那么表示层上的声明应为:

Hi,

Do I am right to say that from your Businesslayer you are retrieving
this list of Grade?
If I am right the Declaration on Presentation Layer should be:

var  grd = Businesslayer.GetGradeID((int)gradeId);

grd 示例内容成绩
列表
希望这可以帮助...

如果有帮助，请记住标记为有帮助....

问候，
Algem

grd example contents List of Grade

Hope this could help...

Remember to mark as helpful if it help....

Regards,
Algem

Algem.

你对我的理解是正确的.但是，即时通讯与普通的桌面应用程序一起使用c#，所以我将var更改为Object，并且工作得很好.

问候

Hi Algem.

You understood me correctly. However, im using c# with a normal desktop application so i changed the var to an Object and worked perfectly fine.

Regards

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