Fixed reset of filter

Author: linkdotnet

LinkDotNet.Blog.UnitTests/Web/Shared/Admin/Dashboard/DateRangeSelectorTests.cs

@@ -39,4 +39,22 @@ public void ShouldSetEndDateWhenSet()
         filter.EndDate.Should().Be(new DateTime(2020, 1, 1));
         filter.StartDate.Should().BeNull();
     }
+
+    [Fact]
+    public void ShouldReset()
+    {
+        Filter filter = null;
+        var cut = RenderComponent<DateRangeSelector>(p => p.Add(s => s.FilterChanged, f =>
+        {
+            filter = f;
+        }));
+        cut.Find("#startDate").Change(new DateTime(2020, 1, 1));
+        cut.Find("#endDate").Change(new DateTime(2020, 1, 1));
+
+        cut.Find("#startDate").Change(string.Empty);
+        cut.Find("#endDate").Change(string.Empty);
+
+        filter.StartDate.Should().BeNull();
+        filter.EndDate.Should().BeNull();
+    }
 }

LinkDotNet.Blog.Web/Shared/Admin/Dashboard/DateRangeSelector.razor

@@ -21,13 +21,13 @@
 
     private async Task StartDateChanged(ChangeEventArgs args)
     {
-        filter.StartDate = args.Value is string dateTime ? DateTime.Parse(dateTime) : null;
+        filter.StartDate = args.Value is string { Length: >0 } dateTime ? DateTime.Parse(dateTime) : null;
         await ApplyFilters();
     }
 
     private async Task EndDateChanged(ChangeEventArgs args)
     {
-        filter.EndDate = args.Value is string dateTime ? DateTime.Parse(dateTime) : null;
+        filter.EndDate = args.Value is string { Length: >0 } dateTime ? DateTime.Parse(dateTime) : null;
         await ApplyFilters();
     }
 }