## ExtendedAttributeTask enumeration

Specifies the extended attributes FieldId used in a task.

```csharp
public enum ExtendedAttributeTask
```

### Values

| Name | Value | Description |
| --- | --- | --- |
| Cost1 | `188743786` | Cost1 (Task) custom field. |
| Cost2 | `188743787` | Cost2 (Task) custom field. |
| Cost3 | `188743788` | Cost3 (Task) custom field. |
| Cost4 | `188743938` | Cost4 (Task) custom field. |
| Cost5 | `188743939` | Cost5 (Task) custom field. |
| Cost6 | `188743940` | Cost6 (Task) custom field. |
| Cost7 | `188743941` | Cost7 (Task) custom field. |
| Cost8 | `188743942` | Cost8 (Task) custom field. |
| Cost9 | `188743943` | Cost9 (Task) custom field. |
| Cost10 | `188743944` | Cost10 (Task) custom field. |
| Date1 | `188743945` | Date1 (Task) custom field. |
| Date2 | `188743946` | Date2 (Task) custom field. |
| Date3 | `188743947` | Date3 (Task) custom field. |
| Date4 | `188743948` | Date4 (Task) custom field. |
| Date5 | `188743949` | Date5 (Task) custom field. |
| Date6 | `188743950` | Date6 (Task) custom field. |
| Date7 | `188743951` | Date7 (Task) custom field. |
| Date8 | `188743952` | Date8 (Task) custom field. |
| Date9 | `188743953` | Date9 (Task) custom field. |
| Date10 | `188743954` | Date10 (Task) custom field. |
| Duration1 | `188743783` | Duration1 (Task) custom field. |
| Duration2 | `188743784` | Duration2 (Task) custom field. |
| Duration3 | `188743785` | Duration3 (Task) custom field. |
| Duration4 | `188743955` | Duration4 (Task) custom field. |
| Duration5 | `188743956` | Duration5 (Task) custom field. |
| Duration6 | `188743957` | Duration6 (Task) custom field. |
| Duration7 | `188743958` | Duration7 (Task) custom field. |
| Duration8 | `188743959` | Duration8 (Task) custom field. |
| Duration9 | `188743960` | Duration9 (Task) custom field. |
| Duration10 | `188743961` | Duration10 (Task) custom field. |
| Finish1 | `188743733` | Finish1 (Task) custom field. |
| Finish2 | `188743736` | Finish2 (Task) custom field. |
| Finish3 | `188743739` | Finish3 (Task) custom field. |
| Finish4 | `188743742` | Finish4 (Task) custom field. |
| Finish5 | `188743745` | Finish5 (Task) custom field. |
| Finish6 | `188743963` | Finish6 (Task) custom field. |
| Finish7 | `188743965` | Finish7 (Task) custom field. |
| Finish8 | `188743967` | Finish8 (Task) custom field. |
| Finish9 | `188743969` | Finish9 (Task) custom field. |
| Finish10 | `188743971` | Finish10 (Task) custom field. |
| Flag1 | `188743752` | Flag1 (Task) custom field. |
| Flag2 | `188743753` | Flag2 (Task) custom field. |
| Flag3 | `188743754` | Flag3 (Task) custom field. |
| Flag4 | `188743755` | Flag4 (Task) custom field. |
| Flag5 | `188743756` | Flag5 (Task) custom field. |
| Flag6 | `188743757` | Flag6 (Task) custom field. |
| Flag7 | `188743758` | Flag7 (Task) custom field. |
| Flag8 | `188743759` | Flag8 (Task) custom field. |
| Flag9 | `188743760` | Flag9 (Task) custom field. |
| Flag10 | `188743761` | Flag10 (Task) custom field. |
| Flag11 | `188743972` | Flag11 (Task) custom field. |
| Flag12 | `188743973` | Flag12 (Task) custom field. |
| Flag13 | `188743974` | Flag13 (Task) custom field. |
| Flag14 | `188743975` | Flag14 (Task) custom field. |
| Flag15 | `188743976` | Flag15 (Task) custom field. |
| Flag16 | `188743977` | Flag16 (Task) custom field. |
| Flag17 | `188743978` | Flag17 (Task) custom field. |
| Flag18 | `188743979` | Flag18 (Task) custom field. |
| Flag19 | `188743980` | Flag19 (Task) custom field. |
| Flag20 | `188743981` | Flag20 (Task) custom field. |
| Number1 | `188743767` | Number1 (Task) custom field. |
| Number2 | `188743768` | Number2 (Task) custom field. |
| Number3 | `188743769` | Number3 (Task) custom field. |
| Number4 | `188743770` | Number4 (Task) custom field. |
| Number5 | `188743771` | Number5 (Task) custom field. |
| Number6 | `188743982` | Number6 (Task) custom field. |
| Number7 | `188743983` | Number7 (Task) custom field. |
| Number8 | `188743984` | Number8 (Task) custom field. |
| Number9 | `188743985` | Number9 (Task) custom field. |
| Number10 | `188743986` | Number10 (Task) custom field. |
| Number11 | `188743987` | Number11 (Task) custom field. |
| Number12 | `188743988` | Number12 (Task) custom field. |
| Number13 | `188743989` | Number13 (Task) custom field. |
| Number14 | `188743990` | Number14 (Task) custom field. |
| Number15 | `188743991` | Number15 (Task) custom field. |
| Number16 | `188743992` | Number16 (Task) custom field. |
| Number17 | `188743993` | Number17 (Task) custom field. |
| Number18 | `188743994` | Number18 (Task) custom field. |
| Number19 | `188743995` | Number19 (Task) custom field. |
| Number20 | `188743996` | Number20 (Task) custom field. |
| Start1 | `188743732` | Start1 (Task) custom field. |
| Start2 | `188743735` | Start2 (Task) custom field. |
| Start3 | `188743738` | Start3 (Task) custom field. |
| Start4 | `188743741` | Start4 (Task) custom field. |
| Start5 | `188743744` | Start5 (Task) custom field. |
| Start6 | `188743962` | Start6 (Task) custom field. |
| Start7 | `188743964` | Start7 (Task) custom field. |
| Start8 | `188743966` | Start8 (Task) custom field. |
| Start9 | `188743968` | Start9 (Task) custom field. |
| Start10 | `188743970` | Start10 (Task) custom field. |
| Text1 | `188743731` | Text1 (Task) custom field. |
| Text2 | `188743734` | Text2 (Task) custom field. |
| Text3 | `188743737` | Text3 (Task) custom field. |
| Text4 | `188743740` | Text4 (Task) custom field. |
| Text5 | `188743743` | Text5 (Task) custom field. |
| Text6 | `188743746` | Text6 (Task) custom field. |
| Text7 | `188743747` | Text7 (Task) custom field. |
| Text8 | `188743748` | Text8 (Task) custom field. |
| Text9 | `188743749` | Text9 (Task) custom field. |
| Text10 | `188743750` | Text10 (Task) custom field. |
| Text11 | `188743997` | Text11 (Task) custom field. |
| Text12 | `188743998` | Text12 (Task) custom field. |
| Text13 | `188743999` | Text13 (Task) custom field. |
| Text14 | `188744000` | Text14 (Task) custom field. |
| Text15 | `188744001` | Text15 (Task) custom field. |
| Text16 | `188744002` | Text16 (Task) custom field. |
| Text17 | `188744003` | Text17 (Task) custom field. |
| Text18 | `188744004` | Text18 (Task) custom field. |
| Text19 | `188744005` | Text19 (Task) custom field. |
| Text20 | `188744006` | Text20 (Task) custom field. |
| Text21 | `188744007` | Text21 (Task) custom field. |
| Text22 | `188744008` | Text22 (Task) custom field. |
| Text23 | `188744009` | Text23 (Task) custom field. |
| Text24 | `188744010` | Text24 (Task) custom field. |
| Text25 | `188744011` | Text25 (Task) custom field. |
| Text26 | `188744012` | Text26 (Task) custom field. |
| Text27 | `188744013` | Text27 (Task) custom field. |
| Text28 | `188744014` | Text28 (Task) custom field. |
| Text29 | `188744015` | Text29 (Task) custom field. |
| Text30 | `188744016` | Text30 (Task) custom field. |
| OutlineCode1 | `188744096` | OutlineCode1 (Task) custom field. |
| OutlineCode2 | `188744098` | OutlineCode2 (Task) custom field. |
| OutlineCode3 | `188744100` | OutlineCode3 (Task) custom field. |
| OutlineCode4 | `188744102` | OutlineCode4 (Task) custom field. |
| OutlineCode5 | `188744104` | OutlineCode5 (Task) custom field. |
| OutlineCode6 | `188744106` | OutlineCode6 (Task) custom field. |
| OutlineCode7 | `188744108` | OutlineCode7 (Task) custom field. |
| OutlineCode8 | `188744110` | OutlineCode8 (Task) custom field. |
| OutlineCode9 | `188744112` | OutlineCode9 (Task) custom field. |
| OutlineCode10 | `188744114` | OutlineCode10 (Task) custom field. |

## Examples

Shows how to add extended attributes with lookups for assignments.

```csharp
var project = new Project(DataDir + "Blank2010.mpp");

// Assign resource "1 TRG: Trade Group" to the "TASK 1" by creating a ResourceAssignment object.
var resource = project.Resources.GetById(1);
var task = project.RootTask.Children.GetById(1);
var assignment = project.ResourceAssignments.Add(task, resource);

// Create custom attribute definition with lookup.
var resExtendedAttributeDefinition = ExtendedAttributeDefinition.CreateLookupResourceDefinition(
    CustomFieldType.Cost,
    ExtendedAttributeResource.Cost5,
    "My lookup resource cost");
project.ExtendedAttributes.Add(resExtendedAttributeDefinition);

var firstValue = new Value { NumericValue = 1500, Description = "Val 1", Id = 1, Val = "1500" };
var secondValue = new Value { NumericValue = 2500, Description = "Val 2", Id = 2 };
resExtendedAttributeDefinition.AddLookupValue(firstValue);
resExtendedAttributeDefinition.AddLookupValue(secondValue);

// This value can be seen in "Resource usage" view of MS Project.
var attributeValue = resExtendedAttributeDefinition.CreateExtendedAttribute(firstValue);
assignment.ExtendedAttributes.Add(attributeValue);

// Create custom attribute definition with lookup.
var taskCostAttr = ExtendedAttributeDefinition.CreateLookupTaskDefinition(CustomFieldType.Cost, ExtendedAttributeTask.Cost4, "My lookup task cost");
project.ExtendedAttributes.Add(taskCostAttr);
var taskFirstValue = new Value { NumericValue = 18, Description = "Task val 1", Id = 3, Val = "18" };
var resSecondValue = new Value { NumericValue = 30, Description = "Task val 2", Id = 4 };
var taskWrongValue = new Value { NumericValue = 99, Description = "Task val Wrong", Id = 5, Val = "18" };

taskCostAttr.AddLookupValue(taskFirstValue);
resExtendedAttributeDefinition.AddLookupValue(resSecondValue);

// This value can be seen in "Task usage" view of MS Project.
assignment.ExtendedAttributes.Add(taskCostAttr.CreateExtendedAttribute(taskFirstValue));

// a wrong values can be removed later
taskCostAttr.RemoveLookupValue(taskWrongValue);

// working with project...
```

### See Also

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