Bugfixes (#101) #patch

Better handling of null values
CustomSelect filter doesn't provide first value in WASM #97
Enum filter doesn't provide first value

src/BlazorTable/Filters/CustomSelect.razor.cs

@@ -3,6 +3,7 @@
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Globalization;
+using System.Linq;
 using System.Linq.Expressions;
 
 namespace BlazorTable
@@ -97,6 +98,12 @@ public Expression<Func<TableItem, bool>> GetFilter()
         public void AddSelect(string key, object value)
         {
             Items.Add(new KeyValuePair<string, object>(key, value));
+
+            if (FilterValue == null)
+            {
+                FilterValue = Items.FirstOrDefault().Value;
+            }
+
             StateHasChanged();
         }
 

src/BlazorTable/Filters/EnumFilter.razor.cs

@@ -53,6 +53,11 @@ protected override void OnInitialized()
                         FilterValue = constantExpression.Value;
                     }
                 }
+
+                if (FilterValue == null)
+                {
+                    FilterValue = Enum.GetValues(Column.Type.GetNonNullableType()).GetValue(0);
+                }
             }
         }
 

src/BlazorTable/Filters/NumberFilter.razor.cs

@@ -71,6 +71,11 @@ protected override void OnInitialized()
 
         public Expression<Func<TableItem, bool>> GetFilter()
         {
+            if (Condition != NumberCondition.IsNull && Condition != NumberCondition.IsNotNull && string.IsNullOrEmpty(FilterValue))
+            {
+                return null;
+            }
+
             return Condition switch
             {
                 NumberCondition.IsEqualTo =>

src/BlazorTable/Filters/StringFilter.razor.cs

@@ -87,6 +87,11 @@ public Expression<Func<TableItem, bool>> GetFilter()
         {
             FilterText = FilterText?.Trim();
 
+            if (Condition != StringCondition.IsNullOrEmpty && Condition != StringCondition.IsNotNulOrEmpty && string.IsNullOrEmpty(FilterText))
+            {
+                return null;
+            }
+
             return Condition switch
             {
                 StringCondition.Contains =>