> For the complete documentation index, see [llms.txt](https://docs.apryse.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apryse.com/xamarin/forms/export-data.md).

# Extract FDF data from a PDF in Xamarin

Learn how to extract data from PDF to FDF and export FDF as XFDF with full support for Forms Data Format. Get the sample code for PDF Form Fill and Data Extraction here! The Apryse Xamarin SDK streaml

To extract data from PDF to FDF, then export FDF as XFDF

{% tabs %}
{% tab title="C#" %}
{% code lineNumbers="true" %}

```csharp
PDFDoc doc = new PDFDoc(filename);

// Extract annotations to FDF.
// Optionally use e_both to extract both forms and annotations
FDFDoc doc_fields = doc.FDFExtract(PDFDoc.ExtractFlag.e_annots_only); //PDFDoc.ExtractFlag.e_forms_only

// Export annotations from FDF to XFDF.
doc_fields.SaveAsXFDF(output_xfdf_filename);

// Optionally write XFDF to a string
string XFDF_string = doc_fields.SaveAsXFDF();
```

{% endcode %}
{% endtab %}
{% endtabs %}

[PDF Form Fill and Form Data Extraction](/xamarin/get-started/samples.md#fdf) Full sample code which illustrates basic FDF merge/extract functionality and full support for FDF (Forms Data Format)


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