## FilterOperation enumeration

Specifies how the criterion established with FieldName, FilterComparisonType, and Value relates to other criteria in the filter.

```csharp
public enum FilterOperation
```

### Values

| Name | Value | Description |
| --- | --- | --- |
| Undefined | `0` | Undefined. |
| And | `1` | AND operator. |
| Or | `2` | OR operator. |

## Examples

Shows how to read task filter criteria.

```csharp
var project = new Project(DataDir + "Project2003.mpp");

var filter = project.TaskFilters.ToList()[1];
Console.WriteLine("Count of criteria rows: " + filter.Criteria.CriteriaRows.Count);
foreach (var row in filter.Criteria.CriteriaRows)
{
    Console.WriteLine("Field: " + row.Field);
    Console.WriteLine("Operation: " + row.Operation);
    Console.WriteLine("Test: " + row.Test);

    var values = row.Values.Where(c => c != null).ToArray();
    if (values.Length == 0)
    {
        continue;
    }

    Console.WriteLine("Value{0}: {1}", values.Length == 1 ? "" : "s", string.Join(", ", values));
}

// print filter criteria as a string 
Console.WriteLine(filter.Criteria.Operation.ToString());

var criteria1 = filter.Criteria.CriteriaRows[0];
Console.WriteLine("Criteria filter 1:");
Console.WriteLine(criteria1.ToString());

var criteria2 = filter.Criteria.CriteriaRows[1];
Console.WriteLine(criteria2.Operation.ToString());
Console.WriteLine(criteria2.CriteriaRows.Count);
Console.WriteLine("Criteria filter 2:");
Console.WriteLine(criteria2.ToString());

var criteria21 = criteria2.CriteriaRows[0];
Console.WriteLine("Criteria filter 21:");
Console.WriteLine(criteria21.ToString());

var criteria22 = criteria2.CriteriaRows[1];
Console.WriteLine("Criteria filter 22:");
Console.WriteLine(criteria22.ToString());
```

### See Also

* namespace [Aspose.Tasks](../../aspose.tasks/)
* assembly [Aspose.Tasks](../../)