WorldWind学习系列八.docVIP

WorldWind学习系列八：Load/Unload Plugins——直捣黄龙篇 第一部分 打开PluginDialog.cs窗体时，会调用273行的 ??private?void?PluginDialog_Load(object?sender,?System.EventArgs?e)??{???//加载插件到ListView控件中????????AddPluginList();??????//Force?UI?state?update???listView_SelectedIndexChanged(this,EventArgs.Empty);???//根据ListView当前选中项，更新窗体按钮功能的可用性???UpdateUIStates();??}??///?summary??///?Fill?the?list?view?with?currently?installed?plugins.??///?/summary??void?AddPluginList()??{???listView.Items.Clear();???foreach?(PluginInfo?pi?in?compiler.Plugins)????{????PluginListItem?li?=?new?PluginListItem(pi);????listView.Items.Add(li);???}??} ? 此处PluginInfo里面有个知识点，请看下面两个截图：（暂缺） ? 就是怎样读取文件头的元数据？PluginInfo.cs 188行ReadMetaData()通过一行行地读取文件内容，从而解析出所需的原数据。 ///?summary??///?Reads?strings?from?the?source?file?header?tags??///?/summary??private?void?ReadMetaData()??{???try???{????if(m_fullPath==null)?????//?Source?code?comments?not?available?????return;????//?Initialize?variables?(prevents?more?than?one?call?here)????if(m_name==null)?????m_name?=?;????if(m_description==null)?????m_description?=?;????if(m_developer==null)?????m_developer?=?;????if(m_webSite==null)?????m_webSite?=?;????if(m_references==null)?????m_references?=?;????using(TextReader?tr?=?File.OpenText(m_fullPath))????{?????//注意：这里将插件文件的所有行内容都读取一遍啦，其实元数据都在前面几行的。?????while(true)?????{??????string?line?=?tr.ReadLine();??????if(line==null)???????break;??????FindTagInLine(line,?NAME,?ref?m_name);??????FindTagInLine(line,?DESCRIPTION,?ref?m_description);??????FindTagInLine(line,?DEVELOPER,?ref?m_developer);??????FindTagInLine(line,?WEBSITE,?ref?m_webSite);??????FindTagInLine(line,?REFERENCES,?ref?m_references);?????????????????????????????????????????//下面是我修改添加的，为了提升一定的效率????if(m_name!=string.Empty?m_description!=string.Empty?m_developer!=string.Empty?m_webSite!=string.Emptym_references!=string.Empty)??????return;?????}????}???}???catch(IOException)???{????//?Ignore???}???finally???{????if(m_na