IAIDocProcessingService.TranslateAsync(PdfDocumentProcessor, PdfDocumentArea, CultureInfo, CancellationToken) Method

Translates text into a specific language with AI-powered translation services.

Namespace: DevExpress.AIIntegration.Docs

Assembly: DevExpress.AIIntegration.Docs.v25.2.dll

NuGet Package: DevExpress.AIIntegration.Docs

Declaration

C#

Task<string> TranslateAsync(
    PdfDocumentProcessor processor,
    PdfDocumentArea area,
    CultureInfo culture,
    CancellationToken cancellationToken = default(CancellationToken)
)

VB.NET

Function TranslateAsync(
    processor As PdfDocumentProcessor,
    area As PdfDocumentArea,
    culture As CultureInfo,
    cancellationToken As CancellationToken = Nothing
) As Task(Of String)

Parameters

Name	Type	Description
processor	PdfDocumentProcessor	The PdfDocumentProcessor instance which content should be translated.
area	PdfDocumentArea	The document area that contains target content.
culture	CultureInfo	An object that specifies culture settings applied during translation.

Optional Parameters

Name	Type	Default	Description
cancellationToken	CancellationToken	null	The token that cancels the task.

Returns

Type	Description
Task<String>	The response that contains AI-generated translation.’

Example

How to: Translate the First PDF Page

The following code snippet translates the first page in a PDF document and appends the translation as a new page:

C#

using DevExpress.AIIntegration;
using DevExpress.AIIntegration.Docs;
using DevExpress.Drawing;
using DevExpress.Pdf;
using Microsoft.Extensions.AI;
using System.Drawing;

// Check "Register Service" section for implementation code
var docProcessingService = 
    defaultAIExtensionsContainer.CreateAIDocProcessingService();

using var pdfDocumentProcessor = new PdfDocumentProcessor();
pdfDocumentProcessor.LoadDocument("Documents/FirstLookExported.pdf");

// Obtain the first page area
var pageBox = pdfDocumentProcessor.Document.Pages[0].CropBox;
PdfDocumentPosition pagePosition1 = new PdfDocumentPosition(1, pageBox.TopLeft);
PdfDocumentPosition pagePosition2 = new PdfDocumentPosition(1, pageBox.BottomRight);
var pageContentArea = PdfDocumentArea.Create(pagePosition1, pagePosition2);

// Translate the page content to Spanish
string translation = await docProcessingService.TranslateAsync(
    pdfDocumentProcessor, 
    pageContentArea, 
    new System.Globalization.CultureInfo("es-ES"));

// Insert a new page and add the translated text
PdfPage page = pdfDocumentProcessor.InsertNewPage(1, PdfPaperSize.Letter);
PdfRectangle pageSize = page.CropBox;
AddContentToPage(pdfDocumentProcessor, page, pageSize, translation);

// Save the modified document
pdfDocumentProcessor.SaveDocument("result.pdf");

// This method draws text on the inserted page
void AddContentToPage(
    PdfDocumentProcessor pdfDocumentProcessor, 
    PdfPage page,
    PdfRectangle pageSize, 
    string text)
{
    using (PdfGraphics graphics = pdfDocumentProcessor.CreateGraphicsWorldSystem())
    {
        using (var textBrush = new DXSolidBrush(Color.FromArgb(255, Color.DarkOrange)))
        {
            DXFont font = new DXFont("Segoe UI", 12, DXFontStyle.Regular);

            // Calculate text size
            SizeF textSize = graphics.MeasureString(
                text, 
                font, 
                new PdfStringFormat());

            // Calculate an area to draw the text
            PointF textPoint = new PointF(0, (float)(pageSize.Height - 10));
            RectangleF rectangle = new RectangleF(
                0, 10,
                (float)pageSize.Width,
                (float)(pageSize.Height / 2));

            // Draw text at the calculated area
            graphics.DrawString(text, font, textBrush, rectangle);
            graphics.AddToPageForeground(page);
        }
    }
}

VB.NET

Imports DevExpress.AIIntegration
Imports DevExpress.AIIntegration.Docs
Imports DevExpress.Drawing
Imports DevExpress.Pdf
Imports Microsoft.Extensions.AI
Imports System.Drawing
Imports System.Globalization

' Check "Register Service" section for implementation code
var docProcessingService = 
    defaultAIExtensionsContainer.CreateAIDocProcessingService()

Using pdfDocumentProcessor As New PdfDocumentProcessor()
    pdfDocumentProcessor.LoadDocument("Documents/FirstLookExported.pdf")

    ' Obtain the first page area
    Dim pageBox = pdfDocumentProcessor.Document.Pages(0).CropBox
    Dim pagePosition1 As New PdfDocumentPosition(1, pageBox.TopLeft)
    Dim pagePosition2 As New PdfDocumentPosition(1, pageBox.BottomRight)
    Dim pageContentArea = PdfDocumentArea.Create(pagePosition1, pagePosition2)

    ' Translate the page content to Spanish
    Dim translation As String = Await docProcessingService.TranslateAsync(
        pdfDocumentProcessor, 
        pageContentArea, 
        New CultureInfo("es-ES"))

    ' Insert a new page and add the translated text
    Dim page As PdfPage = pdfDocumentProcessor.InsertNewPage(1, PdfPaperSize.Letter)
    Dim pageSize As PdfRectangle = page.CropBox
    AddContentToPage(pdfDocumentProcessor, page, pageSize, translation)

    ' Save the modified document
    pdfDocumentProcessor.SaveDocument("result.pdf")
End Using

' This method draws text on the inserted page
Private Sub AddContentToPage(
    pdfDocumentProcessor As PdfDocumentProcessor, 
    page As PdfPage,
    pageSize As PdfRectangle, 
    text As String)

    Using graphics As PdfGraphics = pdfDocumentProcessor.CreateGraphicsWorldSystem()
        Using textBrush As New DXSolidBrush(Color.FromArgb(255, Color.DarkOrange))
            Dim font As New DXFont("Segoe UI", 12, DXFontStyle.Regular)

            ' Calculate text size
            Dim textSize As SizeF = graphics.MeasureString(
                text, 
                font, 
                New PdfStringFormat())

            ' Calculate an area to draw the text
            Dim textPoint As New PointF(0, CSng(pageSize.Height - 10))
            Dim rectangle As New RectangleF(
                0, 
                10, 
                CSng(pageSize.Width), 
                CSng(pageSize.Height / 2))

            ' Draw text at the calculated area
            graphics.DrawString(text, font, textBrush, rectangle)
            graphics.AddToPageForeground(page)
        End Using
    End Using
End Sub