# Filter Operators

The `FilterOperator` enum contains all filter operators supported in the Telerik UI for Blazor suite.

Each filter operator is compatible with a specific data type. Always use the correct filter operator during filter customizations. Otherwise, an exception will occur about the assigned `DefaultFilterOperator` not applicable for the current data type.

> important ArgumentException: The assigned DefaultFilterOperator ... for the Start column is not applicable for ... type.

Below you can find a complete list of the supported filter operators under the corresponding data type.

| **String**         | **Numeric**              | **Bool**    | **Enum**       | **Date**                 |
| ------------------ | ------------------------ | ----------- | -------------- | ------------------------ |
| `IsEqualTo`        | `IsLessThan`             | `IsEqualTo` | `IsEqualTo`    | `IsEqualTo`              |
| `IsNotEqualTo`     | `IsLessThanOrEqualTo`    |             | `IsNotEqualTo` | `IsNotEqualTo`           |
| `StartsWith`       | `IsEqualTo`              |             | `IsNull`       | `IsGreaterThanOrEqualTo` |
| `Contains`         | `IsNotEqualTo`           |             | `IsNotNull `   | `IsGreaterThan`          |
| `DoesNotContain`   | `IsGreaterThanOrEqualTo` |             |                | `IsLessThanOrEqualTo`    |
| `EndsWith`         | `IsGreaterThan`          |             |                | `IsLessThan`             |
| `IsNull`           | `IsNull`                 |             |                | `IsNull`                 |
| `IsNotNull`        | `IsNotNull`              |             |                | `IsNotNull`              |
| `IsEmpty`          |                          |             |                |                          |
| `IsNotEmpty`       |                          |             |                |                          |
| `IsNullOrEmpty`    |                          |             |                |                          |
| `IsNotNullOrEmpty` |                          |             |                |                          |