## ExternalLink class

Represents an external link in a workbook.

```javascript
class ExternalLink;
```


### Example
```javascript
const { Workbook } = AsposeCells;

//Open a file with external links
var workbook = new Workbook(data);

//Get External Link 
var externalLink = workbook.worksheets.externalLinks.get(0);
//Change External Link's Data Source
externalLink.dataSource = "input/Book1.xls";
```
## Properties

| Property | Type | Description |
| --- | --- | --- |
| [type](#type--)| ExternalLinkType | Readonly. Gets the type of external link. |
| [pathType](#pathType--)| string | Readonly. Get the path type of this external link |
| [originalDataSource](#originalDataSource--)| string | Represents stored data source of the external link. |
| [dataSource](#dataSource--)| string | Represents data source of the external link. |
| [isReferred](#isReferred--)| boolean | Readonly. Indicates whether this external link is referenced by others. |
| [isVisible](#isVisible--)| boolean | Readonly. Indicates whether this external link is visible in MS Excel. |

## Methods

| Method | Description |
| --- | --- |
| [addExternalName(string, string)](#addExternalName-string-string-)| Adds an external name. |


### type {#type--}

Readonly. Gets the type of external link.

```javascript
type : ExternalLinkType;
```


### pathType {#pathType--}

Readonly. Get the path type of this external link

```javascript
pathType : string;
```


### originalDataSource {#originalDataSource--}

Represents stored data source of the external link.

```javascript
originalDataSource : string;
```


### dataSource {#dataSource--}

Represents data source of the external link.

```javascript
dataSource : string;
```


### isReferred {#isReferred--}

Readonly. Indicates whether this external link is referenced by others.

```javascript
isReferred : boolean;
```


### isVisible {#isVisible--}

Readonly. Indicates whether this external link is visible in MS Excel.

```javascript
isVisible : boolean;
```


### addExternalName(string, string) {#addExternalName-string-string-}

Adds an external name.

```javascript
addExternalName(text: string, referTo: string) : void;
```

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| text | string | The text of the external name.         /// If the external name belongs to a worksheet, the text should be as Sheet1!Text. |
| referTo | string | The referTo of the external name. It must be a cell or the range. |