首页 \ 问答 \ Prism / MEF新视图没有从MEF导入获取新的视图模型(Prism / MEF new view not getting a new viewmodel from MEF import)

Prism / MEF新视图没有从MEF导入获取新的视图模型(Prism / MEF new view not getting a new viewmodel from MEF import)

 我有一个标签式应用程序，我希望用户能够搜索一个人，然后在新视图中显示该人的详细信息。 用户应该能够为不同的人打开多个人员详细信息视图。 
 

 我有点不确定我是否遵循了创建新视图的正确程序。 使用Unity（我不是），似乎你会调用Container.Resolve(view)但是我正在执行以下操作，为了在view / viewmodel中创建导入，satisfImports是必需的。 
 

PersonDetailView view = new PersonDetailView();
_container.SatisfyImportsOnce(view);
_regionManager.Regions["MainRegion"].Add(view, this.SelectedPerson.Name);
_regionManager.RequestNavigate("MainRegion", new Uri("PersonDetailView", UriKind.Relative));

 

 在我的PersonDetailView的代码中，我有以下属性来设置数据上下文。 
 

[Import]
public PersonDetailsViewModel ViewModel
{
   set
   {
       this.DataContext = value;
   }
} 

 

 这似乎有效，但我遇到的麻烦是，当我创建第二人称视图时，新视图获取与已创建的视图相同的datacontext实例。 
 

 这是因为我正在错误地创建我的观点，还是有一种方法可以告诉MEF在满足我的新视图的导入时创建新的对象？ 

I have a tabbed application where I want the user to be able to search for a person and then, in a new view, show the person's details. The user should be able to have multiple person detail views open for different people.
 

I was a little unsure if I am following the correct procedure for creating my new view. Using Unity (which I am not) it seems you would call Container.Resolve(view) however I am doing the following, the satisfyImports was necessary in order for my imports in the view / viewmodel to be created.
 

PersonDetailView view = new PersonDetailView();
_container.SatisfyImportsOnce(view);
_regionManager.Regions["MainRegion"].Add(view, this.SelectedPerson.Name);
_regionManager.RequestNavigate("MainRegion", new Uri("PersonDetailView", UriKind.Relative));

 

In the code for my PersonDetailView I have the following property to set the data context.
 

[Import]
public PersonDetailsViewModel ViewModel
{
   set
   {
       this.DataContext = value;
   }
} 

 

This seems to work but the trouble I am having is that when I create a second person view, the new view is getting the same instance of the datacontext as the view that is already created.
 

Is this because I am creating my views incorrectly or is there a way that I tell MEF to create a new oject when it fulfills the imports for my new view?

原文：https://stackoverflow.com/questions/5484880
更新时间：2022-06-25 10:06

最满意答案

 以下是我在项目中的工作， 
 

        <plugin>
            <groupId>org.eclipse.tycho</groupId>
            <artifactId>tycho-p2-director-plugin</artifactId>
            <version>${tycho-version}</version>
            <executions>
                <execution>
                    <id>materialize-products</id>
                    <goals>
                        <goal>materialize-products</goal>
                    </goals>
                    <configuration>
                        <installFeatures>false</installFeatures>
                        <profile>Installer</profile>
                    </configuration>
                </execution>
                <execution>
                    <id>archive-products</id>
                    <goals>
                        <goal>archive-products</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
        <!-- ANT actions -->
        <plugin>
            <artifactId>maven-antrun-plugin</artifactId>
            <version>1.6</version>
            <executions>
                <!-- Rename the ZIP files -->
                <execution>
                    <id>update-zip-files</id>
                    <phase>install</phase>
                    <configuration>
                        <target>
                            <!-- Rename the products -->
                            <move verbose="true" todir="${project.build.directory}/products">
                                <mapper type="regexp" from="^(Installer-)(.*)$$"
                                    to="\1N-${maven.build.timestamp}-\2" />

                                <fileset dir="${project.build.directory}/products">
                                    <include name="*.zip" />
                                </fileset>
                            </move>
                        </target>
                    </configuration>
                    <goals>
                        <goal>run</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>


Below is what I do in my project,
 

        <plugin>
            <groupId>org.eclipse.tycho</groupId>
            <artifactId>tycho-p2-director-plugin</artifactId>
            <version>${tycho-version}</version>
            <executions>
                <execution>
                    <id>materialize-products</id>
                    <goals>
                        <goal>materialize-products</goal>
                    </goals>
                    <configuration>
                        <installFeatures>false</installFeatures>
                        <profile>Installer</profile>
                    </configuration>
                </execution>
                <execution>
                    <id>archive-products</id>
                    <goals>
                        <goal>archive-products</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
        <!-- ANT actions -->
        <plugin>
            <artifactId>maven-antrun-plugin</artifactId>
            <version>1.6</version>
            <executions>
                <!-- Rename the ZIP files -->
                <execution>
                    <id>update-zip-files</id>
                    <phase>install</phase>
                    <configuration>
                        <target>
                            <!-- Rename the products -->
                            <move verbose="true" todir="${project.build.directory}/products">
                                <mapper type="regexp" from="^(Installer-)(.*)$$"
                                    to="\1N-${maven.build.timestamp}-\2" />

                                <fileset dir="${project.build.directory}/products">
                                    <include name="*.zip" />
                                </fileset>
                            </move>
                        </target>
                    </configuration>
                    <goals>
                        <goal>run</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>

相关问答

更多

相关文章

更多
  • [译文] 恶意软件行为综述 - A View on Current Malware Behaviors
  • 使用Solr Data Import的delta-import功能
  • （二）solr data import
  • Solr集群架构概述及delta-import详细配置
  • 自己封装的一个Solr Data Import Request Handler Scheduler
  • [15] 微信公众帐号开发教程第15篇-自定义菜单的view类型（访问网页）
  • Becoming a data scientist
  • solr 的delta-import
  • Solr4：配置Data Import，从数据库直接创建索引
  • Solr集群架构概述及delta-import详细配置

    • 最新问答

    更多
  • 您如何使用git diff文件，并将其应用于同一存储库的副本的本地分支？(How do you take a git diff file, and apply it to a local branch that is a copy of the same repository?)
  • 将长浮点值剪切为2个小数点并复制到字符数组(Cut Long Float Value to 2 decimal points and copy to Character Array)
  • OctoberCMS侧边栏不呈现(OctoberCMS Sidebar not rendering)
  • 页面加载后对象是否有资格进行垃圾回收？(Are objects eligible for garbage collection after the page loads?)
  • codeigniter中的语言不能按预期工作(language in codeigniter doesn' t work as expected)
  • 在计算机拍照在哪里进入
  • 使用cin.get（）从c ++中的输入流中丢弃不需要的字符(Using cin.get() to discard unwanted characters from the input stream in c++)
  • No for循环将在for循环中运行。(No for loop will run inside for loop. Testing for primes)
  • 单页应用程序：页面重新加载(Single Page Application: page reload)
  • 在循环中选择具有相似模式的列名称(Selecting Column Name With Similar Pattern in a Loop)
  • System.StackOverflow错误(System.StackOverflow error)
  • KnockoutJS未在嵌套模板上应用beforeRemove和afterAdd(KnockoutJS not applying beforeRemove and afterAdd on nested templates)
  • 散列包括方法和/或嵌套属性(Hash include methods and/or nested attributes)
  • android - 如何避免使用Samsung RFS文件系统延迟/冻结？(android - how to avoid lag/freezes with Samsung RFS filesystem?)
  • TensorFlow：基于索引列表创建新张量(TensorFlow: Create a new tensor based on list of indices)
  • 企业安全培训的各项内容
  • 错误：RPC失败;(error: RPC failed; curl transfer closed with outstanding read data remaining)
  • C＃类名中允许哪些字符？(What characters are allowed in C# class name?)
  • NumPy：将int64值存储在np.array中并使用dtype float64并将其转换回整数是否安全？(NumPy: Is it safe to store an int64 value in an np.array with dtype float64 and later convert it back to integer?)
  • 注销后如何隐藏导航portlet？(How to hide navigation portlet after logout?)
  • 将多个行和可变行移动到列(moving multiple and variable rows to columns)
  • 提交表单时忽略基础href，而不使用Javascript(ignore base href when submitting form, without using Javascript)
  • 对setOnInfoWindowClickListener的意图(Intent on setOnInfoWindowClickListener)
  • Angular $资源不会改变方法(Angular $resource doesn't change method)
  • 在Angular 5中不是一个函数(is not a function in Angular 5)
  • 如何配置Composite C1以将.m和桌面作为同一站点提供服务(How to configure Composite C1 to serve .m and desktop as the same site)
  • 不适用：悬停在悬停时：在元素之前[复制](Don't apply :hover when hovering on :before element [duplicate])
  • 常见的python rpc和cli接口(Common python rpc and cli interface)
  • Mysql DB单个字段匹配多个其他字段(Mysql DB single field matching to multiple other fields)
  • 产品页面上的Magento Up出售对齐问题(Magento Up sell alignment issue on the products page)

    • Copyright ©2023 peixunduo.com All Rights Reserved.粤ICP备14003112号

    本站部分内容来源于互联网，仅供学习和参考使用，请莫用于商业用途。如有侵犯你的版权，请联系我们(neng862121861#163.com)，本站将尽快处理。谢谢合作！