With this fix, I prevented the IsNull and IsNotNull operators from appearing in the filter options for non-nullable numeric, date, boolean, and guid types.
In this way, I have resolved the reload error that was occurring both on the Blazor side and on the OData backend.
public virtual IEnumerable GetFilterOperators()
{
if (FilterOperators != null) return FilterOperators;
if (PropertyAccess.IsEnum(FilterPropertyType))
return new FilterOperator[] { FilterOperator.Equals, FilterOperator.NotEquals };
if (PropertyAccess.IsNullableEnum(FilterPropertyType))
return new FilterOperator[] { FilterOperator.Equals, FilterOperator.NotEquals, FilterOperator.IsNull, FilterOperator.IsNotNull };
if ((typeof(IEnumerable).IsAssignableFrom(FilterPropertyType) || typeof(IEnumerable<>).IsAssignableFrom(FilterPropertyType))
&& FilterPropertyType != typeof(string))
{
var operators = new FilterOperator[]
{
FilterOperator.Contains,
FilterOperator.DoesNotContain,
FilterOperator.Equals,
FilterOperator.NotEquals,
FilterOperator.IsNull,
FilterOperator.IsNotNull,
FilterOperator.IsEmpty,
FilterOperator.IsNotEmpty
};
if (!string.IsNullOrEmpty(Property))
{
var type = PropertyAccess.GetPropertyType(typeof(TItem), Property);
if ((typeof(IEnumerable).IsAssignableFrom(type) || typeof(IEnumerable<>).IsAssignableFrom(type)) && type != typeof(string))
{
operators = operators.Concat(new FilterOperator[] { FilterOperator.In, FilterOperator.NotIn }).ToArray();
}
}
return operators;
}
// 🆕 YENİ: Tüm tipindeki property'ler için IsNull ve IsNotNull operatörlerini filtrele
var allOperators = Enum.GetValues(typeof(FilterOperator)).Cast<FilterOperator>().Where(o => o != FilterOperator.In && o != FilterOperator.NotIn);
// �� YENİ: Non-nullable numeric, date, boolean ve guid tipler için IsNull ve IsNotNull operatörlerini çıkar
if (FilterPropertyType == typeof(int) || FilterPropertyType == typeof(long) || FilterPropertyType == typeof(short) ||
FilterPropertyType == typeof(byte) || FilterPropertyType == typeof(uint) || FilterPropertyType == typeof(ulong) ||
FilterPropertyType == typeof(ushort) || FilterPropertyType == typeof(sbyte) || FilterPropertyType == typeof(double) ||
FilterPropertyType == typeof(float) || FilterPropertyType == typeof(decimal) ||
FilterPropertyType == typeof(DateTime) || FilterPropertyType == typeof(DateTimeOffset) || FilterPropertyType == typeof(DateOnly) ||
FilterPropertyType == typeof(TimeOnly) || FilterPropertyType == typeof(TimeSpan) ||
FilterPropertyType == typeof(bool) || FilterPropertyType == typeof(Guid))
{
allOperators = allOperators.Where(o => o != FilterOperator.IsNull && o != FilterOperator.IsNotNull);
}
return allOperators.Where(o => {
var isStringOperator = o == FilterOperator.Contains || o == FilterOperator.DoesNotContain
|| o == FilterOperator.StartsWith || o == FilterOperator.EndsWith || o == FilterOperator.IsEmpty || o == FilterOperator.IsNotEmpty;
return FilterPropertyType == typeof(string) ? isStringOperator
|| o == FilterOperator.Equals || o == FilterOperator.NotEquals
|| o == FilterOperator.IsNull || o == FilterOperator.IsNotNull
: !isStringOperator;
});
}