improve search user experience

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

@@ -76,13 +76,9 @@
 
     protected override async Task OnInitializedAsync()
     {
-        if (PageState.QueryString.ContainsKey("q"))
+        if (_keywords == null && PageState.QueryString.ContainsKey("q"))
         {
             _keywords = WebUtility.UrlDecode(PageState.QueryString["q"]);
-        }
-
-        if (!string.IsNullOrEmpty(_keywords))
-        {
             await PerformSearch();
         }
     }
@@ -97,6 +93,8 @@
         _loading = true;
         StateHasChanged();
 
+        if (!string.IsNullOrEmpty(_keywords))
+        {
             var searchQuery = new SearchQuery
                 {
                     SiteId = PageState.Site.SiteId,
@@ -109,6 +107,11 @@
                 };
 
             _searchResults = await SearchResultsService.GetSearchResultsAsync(searchQuery);
+        }
+        else
+        {
+            AddModuleMessage(Localizer["NoCriteria"], MessageType.Info, "bottom");
+        }
 
         _loading = false;
         StateHasChanged();

Oqtane.Client/Resources/Modules/Admin/SearchResults/Index.resx

@@ -117,6 +117,9 @@
   <resheader name="writer">
     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
+  <data name="NoCriteria" xml:space="preserve">
+    <value>You Must Provide Some Search Criteria</value>
+  </data>
   <data name="NoResult" xml:space="preserve">
     <value>No Content Matches The Criteria Provided</value>
   </data>

Oqtane.Client/Themes/Controls/Theme/Search.razor

@@ -53,7 +53,7 @@
     private void PerformSearch()
     {
         var keywords = HttpContext.HttpContext.Request.Form["keywords"];
-        if (!string.IsNullOrEmpty(keywords) && _searchResultsPage != null)
+        if (_searchResultsPage != null)
         {
             var url = NavigateUrl(_searchResultsPage.Path, $"q={keywords}");
             NavigationManager.NavigateTo(url);