添加 ApplicationExt 静态类及初始化调用，解决因为未初始化主机导致的找不到资源问题

在 ApplicationExt.cs 文件中添加了一个新的静态类 ApplicationExt，包含 SetMainWindow 和 InitApplication 方法。更新 DesignPluginEntry.cs 和 PluginEntry.cs 文件，引入 Sinvo.EplanHpD.Plugin.WPFUI.Utils 命名空间，并在 Initialize 方法中调用 ApplicationExt.InitApplication 方法。

Sinvo.EplanHpD.Plugin.WPFUI/Utils/ApplicationExt.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Windows;
+
+namespace Sinvo.EplanHpD.Plugin.WPFUI.Utils
+{
+    public static class ApplicationExt
+    {
+        public static void SetMainWindow(this Application application, Window window)
+        {
+            if (application == null)
+            {
+                throw new ArgumentNullException(nameof(application));
+            }
+            if (window == null)
+            {
+                throw new ArgumentNullException(nameof(window));
+            }
+            application.MainWindow = window;
+        }
+        public static void InitApplication()
+        {
+            if (Application.Current == null)
+            {
+                new System.Windows.Application
+                {
+                    ShutdownMode = ShutdownMode.OnExplicitShutdown,
+                    Resources = new ResourceDictionary
+                    {
+                        Source = new Uri("pack://application:,,,/Sinvo.EplanHpD.Plugin.WPFUI;component/Themes/Theme.xaml")
+                    }
+                };
+            }
+        }
+    }
+}

Sinvo.EplanHpD.Plugin/DesignPluginEntry.cs

@@ -1,6 +1,7 @@
 using EPLAN.Harness.API;
 using EPLAN.Harness.API.Plugins.Core;
 using Sinvo.EplanHpD.Plugin.WPFUI;
+using Sinvo.EplanHpD.Plugin.WPFUI.Utils;
 using System;
 using System.Drawing;
 using System.IO;
@@ -9,7 +10,11 @@ using System.Windows.Forms.Integration;
 
 namespace Sinvo.EplanHpD.Plugin
 {
+#if DEBUG
     public class DesignPluginEntry : EPLAN.Harness.API.Plugins.IHpDPlugin
+#else
+    public class DesignPluginEntry
+#endif
     {
         public string Name => "兴禾ProD插件-3D";
 
@@ -55,6 +60,8 @@ namespace Sinvo.EplanHpD.Plugin
         public void Initialize()
         {
             AppDomainDllLoader.SetLaoder();
+            ApplicationExt.InitApplication();
+
         }
 
 

Sinvo.EplanHpD.Plugin/PluginEntry.cs

@@ -4,6 +4,7 @@ using EPLAN.Harness.API.Plugins.Core;
 using EPLAN.Harness.Core.Controls;
 using EPLAN.Harness.ProjectCore;
 using Sinvo.EplanHpD.Plugin.WPFUI;
+using Sinvo.EplanHpD.Plugin.WPFUI.Utils;
 using System;
 using System.Drawing;
 using System.IO;
@@ -142,7 +143,7 @@ namespace Sinvo.EplanHpD.Plugin
         {
             //throw new NotImplementedException();
             AppDomainDllLoader.SetLaoder();
-
+            ApplicationExt.InitApplication();
         }
 
         public void Terminate()