使用MEF时出错 | 使用MEF时出错

本文介绍了使用MEF时出错的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我在使用MEF作为项目的一部分时遇到错误。

可能是什么问题？

构图保持不变。由于以下错误，更改被拒绝：

组合产生单个组合错误。根本原因如下。查看CompositionException.Errors属性以获取更多详细信息。

1）未找到符合约束条件的导出：

ContractName SimpleCalculator3.ICalculator

RequiredTypeIdentity SimpleCalculator3.ICalculator

导致：无法设置导入'SimpleCalculator3.Program.calculator（ContractName =SimpleCalculator3.ICalculator）'部分'SimpleCalculator3.Program'。

元素：SimpleCalculator3.Program.calculator（ContractName =SimpleCalculator3.ICalculator） - > SimpleCalculator3.Program

解决方案

I am getting below Error while using MEF as a part of my project.

What Could be the issue?

The composition remains unchanged. The changes were rejected because of the following error(s):
The composition produced a single composition error. The root cause is provided below. Review the CompositionException.Errors property for more detailed information.

1) No exports were found that match the constraint:
ContractNameSimpleCalculator3.ICalculator
RequiredTypeIdentitySimpleCalculator3.ICalculator

Resulting in: Cannot set import 'SimpleCalculator3.Program.calculator (ContractName="SimpleCalculator3.ICalculator")' on part 'SimpleCalculator3.Program'.
Element: SimpleCalculator3.Program.calculator (ContractName="SimpleCalculator3.ICalculator") --> SimpleCalculator3.Program

解决方案

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