我有一个基于MEF的应用程序,可以使用插件进行自定义.这个应用程序有几个导入的部分,我想在用户决定摆脱该插件时在运行时删除其中一些(以便能够删除包含它们的.dll).
CompositionBatch会做我需要的,但它需要ComposablePart实例作为RemovePart()方法的输入参数,我只有实现ISomething接口的普通对象,或者ComposablePartDefinition实例中的实例AggregateCatalog.所以我的问题是:
我会用以下内容:
var parts = Container.Catalog.Parts
.Where(p => iDontNeed(p))
.Select(p => howDoIConvertComposablePartDefinition2ComposablePart(p));
var batch = new CompositionBatch();
parts.ToList().ForEach(part => batch.RemovePart(part));
谢谢
我正在尝试在运行CentOS arm版本(CentOS-Userland-7-armv7hl-Minimal-1708-RaspberryPi3)的Raspberry Pi3 Model B上运行我的AspNetCore 2应用程序.我安装了libunwind和libicu-devel yum install,但是在尝试运行我的应用程序时,我总是收到以下错误:
[root@centos-rpi3 ~]# /opt/dotnet/dotnet my.dll
FailFast: Couldn't find a valid ICU package installed on the system. Set the configuration flag System.Globalization.Invariant to true if you want to run with no globalization support.
at System.Environment.FailFast(System.String)
at System.Globalization.GlobalizationMode.GetGlobalizationInvariantMode()
at System.Globalization.GlobalizationMode..cctor()
at System.Globalization.CultureData.CreateCultureWithInvariantData()
at System.Globalization.CultureData.get_Invariant()
at System.Globalization.CultureData.GetCultureData(System.String, Boolean)
at System.Globalization.CultureInfo.InitializeFromName(System.String, Boolean)
at System.Globalization.CultureInfo.Init()
at System.Globalization.CultureInfo..cctor()
at System.Globalization.CultureInfo.get_InvariantCulture()
at System.StringComparer..cctor()
at System.AppDomainSetup.SetCompatibilitySwitches(System.Collections.Generic.IEnumerable`1<System.String>)
at System.AppDomain.PrepareDataForSetup(System.String, System.AppDomainSetup, System.Security.Policy.Evidence, System.Security.Policy.Evidence, IntPtr, System.String, System.String[], System.String[])
Aborted
对于dotnet核心安装,我按照此处描述的指南(任务:在Raspberry Pi上安装.NET Core Runtime): …
情况:我有一个JavaServer Faces页面和一个会话范围的托管bean,它有两个ArrayList<Integer>属性:一个用于保存可能值列表,另一个用于保存选定值列表.在JSF页面上有一个<h:selectManyListBox>绑定了这两个属性的组件.
问题:提交表单后,所选的值将转换为字符串(ArrayList类型的属性实际上包含几个字符串!); 但是,当我使用转换器时,我收到如下错误消息:
验证错误:值无效
问题:如何正确地将ArrayList<Integer>属性绑定到<h:selectManyListBox>组件？
谢谢你的帮助.
具体代码
JSF页面:
<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core">
<h:body>
<h:form>
<h:selectManyListbox value="#{testBean.selection}">
<f:selectItems value="#{testBean.list}"></f:selectItems>
</h:selectManyListbox>
<h:commandButton action="#{testBean.go}" value="go" />
<ui:repeat value="#{testBean.selection}" var="i">
#{i}: #{i.getClass()}
</ui:repeat>
</h:form>
</h:body>
</html>
托管bean:
import java.io.Serializable;
import java.util.ArrayList;
@javax.faces.bean.ManagedBean
@javax.enterprise.context.SessionScoped
public class TestBean implements Serializable
{
private ArrayList<Integer> selection;
private ArrayList<Integer> list;
public ArrayList<Integer> getList()
{ …