Resolved #829

modules/docs/src/Volo.Docs.Web/Pages/Documents/Project/Index.cshtml

@@ -45,7 +45,7 @@
                     <nav class="navbar navbar-logo">
                         @if (!Model.Project.Name.IsNullOrWhiteSpace())
                         {
-                            <a class="navbar-brand w-100" href="@Model.CreateLink(Model.LatestVersionInfo, Model.GetSpecificVersionOrLatest())">
+                            <a class="navbar-brand w-100" href="@Model.CreateVersionLink(Model.LatestVersionInfo, Model.GetSpecificVersionOrLatest())">
                                 <span id="ProjectName">@Model.Project.Name</span><br>
                                 <strong class="display-block">
                                     @L["Documents"]
@@ -72,12 +72,21 @@
                 </div>
 
                 <div class="docs-tree-list">
-                    <div class="docs-filter">
-                        <input class="form-control" type="search" placeholder="Filter topics" aria-label="Filter">
-                        <span class="my-2 filter-icon my-sm-0">
-                            <i class="fa fa-filter"></i>
-                        </span>
-                    </div>
+
+                    @if (Model.ProjectSelectItems.Any())
+                    {
+                        <div class="docs-version">
+                            <div class="version-select">
+                                <div class="input-group">
+                                    <div class="input-group-prepend">
+                                        <label class="input-group-text">@L["Project"]</label>
+                                    </div>
+
+                                    <select asp-items="Model.ProjectSelectItems" class="form-control" onchange="window.location.replace(this.value)"></select>
+                                </div>
+                            </div>
+                        </div>
+                    }
 
                     @if (Model.VersionSelectItems.Any())
                     {
@@ -88,12 +97,19 @@
                                         <label class="input-group-text">@L["Version"]</label>
                                     </div>
 
-                                    <select asp-items="Model.VersionSelectItems" class="form-control" onchange="window.location.replace(this.value)"></select>
+                                    <select asp-items="Model.VersionSelectItems" class="form-control" onchange="if (this.value) { window.location.replace(this.value) }"></select>
                                 </div>
                             </div>
                         </div>
                     }
 
+                    <div class="docs-filter">
+                        <input class="form-control" type="search" placeholder="Filter topics" aria-label="Filter">
+                        <span class="my-2 filter-icon my-sm-0">
+                            <i class="fa fa-filter"></i>
+                        </span>
+                    </div>
+
                     @if (Model.Navigation == null || Model.Navigation.Content.IsNullOrEmpty())
                     {
                         <div class="text-muted p-3">

modules/docs/src/Volo.Docs.Web/Pages/Documents/Project/Index.cshtml.cs

@@ -31,6 +31,8 @@ namespace Volo.Docs.Pages.Documents.Project
 
         public List<SelectListItem> VersionSelectItems { get; private set; }
 
+        public List<SelectListItem> ProjectSelectItems { get; private set; }
+
         public NavigationWithDetailsDto Navigation { get; private set; }
 
         public VersionInfoViewModel LatestVersionInfo { get; private set; }
@@ -52,6 +54,7 @@ namespace Volo.Docs.Pages.Documents.Project
         public async Task OnGetAsync()
         {
             await SetProjectAsync();
+            await SetProjectsAsync();
             await SetVersionAsync();
             await SetDocumentAsync();
             await SetNavigationAsync();
@@ -62,6 +65,18 @@ namespace Volo.Docs.Pages.Documents.Project
             Project = await _projectAppService.GetAsync(ProjectName);
         }
 
+        private async Task SetProjectsAsync()
+        {
+            var projects = await _projectAppService.GetListAsync();
+
+            ProjectSelectItems = projects.Items.Select(p => new SelectListItem
+            {
+                Text = p.Name,
+                Value = p.Id != Project.Id ? "/documents/" + p.ShortName + "/" + DocsAppConsts.Latest : null,
+                Selected = p.Id == Project.Id
+            }).ToList();
+        }
+
         private async Task SetVersionAsync()
         {
             //TODO: Needs refactoring
@@ -101,7 +116,7 @@ namespace Volo.Docs.Pages.Documents.Project
             VersionSelectItems = versions.Select(v => new SelectListItem
             {
                 Text = v.DisplayText,
-                Value = CreateLink(LatestVersionInfo, v.Version, DocumentName),
+                Value = CreateVersionLink(LatestVersionInfo, v.Version, DocumentName),
                 Selected = v.IsSelected
             }).ToList();
         }
@@ -128,7 +143,7 @@ namespace Volo.Docs.Pages.Documents.Project
             Navigation.ConvertItems();
         }
         
-        public string CreateLink(VersionInfoViewModel latestVersion, string version, string documentName = null)
+        public string CreateVersionLink(VersionInfoViewModel latestVersion, string version, string documentName = null)
         {
             if (latestVersion == null || latestVersion.Version == version)
             {