diff --git a/AyCode.Blazor.Components/Services/AcSignalRDataSource.cs b/AyCode.Blazor.Components/Services/AcSignalRDataSource.cs
index 016e440..6c26b9a 100644
--- a/AyCode.Blazor.Components/Services/AcSignalRDataSource.cs
+++ b/AyCode.Blazor.Components/Services/AcSignalRDataSource.cs
@@ -122,7 +122,7 @@ namespace AyCode.Blazor.Components.Services
         {
             var parameters = new List<object>();
             if (ContextIds != null) parameters.AddRange(ContextIds.Cast<object>());
-            if (!FilterText.IsNullOrWhiteSpace()) parameters.Add(FilterText);
+            if (FilterText != null) parameters.Add(FilterText); //Az empty string-et beletesszük, h legyen paraméter! - J.
 
             if (parameters.Count == 0) parameters = null;
             return parameters?.ToArray();