---
title: "AsfIndexer..::.Index Method (String)"
canonical: https://www.graphicsmill.com/docs/gm5/M_Aurigma_GraphicsMill_Codecs_AsfIndexer_Index_1_bb3a7a4f.htm
product: "Graphics Mill 5.5 for .NET"
---

This documentation is for the old version. [Go to the latest Graphics Mill docs](https://www.graphicsmill.com/docs/gm/)

# AsfIndexer.Index Method (String)
 
Creates an index for the specified file.
 
**Namespace:** [Aurigma.GraphicsMill.Codecs](https://www.graphicsmill.com/docs/gm5/N_Aurigma_GraphicsMill_Codecs.htm.md)
 **Assembly:** Aurigma.GraphicsMill.Codecs.MediaProcessor (in Aurigma.GraphicsMill.Codecs.MediaProcessor.dll)
 
## Syntax
  
```
Public Sub Index ( _fileName As String _
)
```
 
```csharp
public void Index(string fileName
)
```
 
### Parameters
 
 - fileName
     - Type: [System.String](http://msdn2.microsoft.com/en-us/s1wwdcbf)
Name of the file to index.
 
## Remarks
  
This method overwrites the existing file with its indexed version. If the operation of index creation fails, the original file is left unchanged.
 
**Note** 
If the ASF file is corrupted (e.g. partially downloaded, or somehow else), it cannot be indexed.
   
## See Also

### Reference

- [AsfIndexer Class](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_Codecs_AsfIndexer.htm.md)
- [Index Overload](https://www.graphicsmill.com/docs/gm5/O_T_Aurigma_GraphicsMill_Codecs_AsfIndexer_Index.htm.md)
- [Aurigma.GraphicsMill.Codecs Namespace](https://www.graphicsmill.com/docs/gm5/N_Aurigma_GraphicsMill_Codecs.htm.md)