Optimized page reloading

Oqtane.Client/Modules/Admin/Themes/Add.razor

@@ -0,0 +1,50 @@
+@using Microsoft.AspNetCore.Components.Routing
+@using Microsoft.AspNetCore.Components.Web
+@using Oqtane.Modules.Controls
+@using Oqtane.Modules
+@using Oqtane.Services
+@using Oqtane.Shared
+@namespace Oqtane.Modules.Admin.Themes
+@inherits ModuleBase
+@inject NavigationManager NavigationManager
+@inject IFileService FileService
+@inject IThemeService ThemeService
+
+<table class="table table-borderless">
+    <tr>
+        <td>
+            <label for="Name" class="control-label">Theme: </label>
+        </td>
+        <td>
+            <FileUpload Filter=".nupkg"></FileUpload>
+        </td>
+    </tr>
+</table>
+@if (uploaded)
+{
+    <button type="button" class="btn btn-success" @onclick="InstallFile">Install</button>
+}
+else
+{
+    <button type="button" class="btn btn-success" @onclick="UploadFile">Upload</button>
+}
+<NavLink class="btn btn-secondary" href="@NavigateUrl()">Cancel</NavLink>
+
+@code {
+    public override SecurityAccessLevel SecurityAccessLevel { get { return SecurityAccessLevel.Host; } }
+
+    bool uploaded = false;
+
+    private async Task UploadFile()
+    {
+        await FileService.UploadFilesAsync("Themes");
+        uploaded = true;
+        StateHasChanged();
+    }
+
+    private async Task InstallFile()
+    {
+        await ThemeService.InstallThemesAsync();
+        NavigationManager.NavigateTo(NavigateUrl(Reload.Application));
+    }
+}

Oqtane.Client/Modules/Admin/Themes/Index.razor

@@ -2,9 +2,9 @@
 @using Oqtane.Services
 @using Oqtane.Models
 @using Oqtane.Modules
+@using Oqtane.Modules.Controls
 @namespace Oqtane.Modules.Admin.Themes
 @inherits ModuleBase
-
 @inject IThemeService ThemeService
 
 @if (Themes == null)
@@ -13,6 +13,7 @@
 }
 else
 {
+    <ActionLink Action="Add" Text="Install Theme" />
     <table class="table table-borderless">
         <thead>
             <tr>