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Commit f2f6281

Browse files
Merge pull request #1 from DevExpress-Examples/main
Main
2 parents 759ef55 + ee3b4ab commit f2f6281

13 files changed

+511
-0
lines changed

‎CS/.dockerignore

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**/.classpath
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**/.dockerignore
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**/.env
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**/.git
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**/.gitignore
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**/.project
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**/.settings
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**/.toolstarget
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**/.vs
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**/.vscode
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**/*.*proj.user
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**/*.dbmdl
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**/*.jfm
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**/azds.yaml
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**/bin
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**/charts
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**/docker-compose*
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**/Dockerfile*
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**/node_modules
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**/npm-debug.log
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**/obj
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**/secrets.dev.yaml
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**/values.dev.yaml
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LICENSE
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README.md

‎CS/BusinessObjects/FileFormat.cs

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namespace RichEditOpenAIWebApi.BusinessObjects
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{
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public enum RichEditFormat
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{
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Txt = 1,
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Rtf = 2,
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Html = 3,
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Docx = 4,
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Mht = 5,
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Xml = 6, // WordML
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Odt = 7,
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ePub = 9,
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Doc = 10,
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Pdf = 11,
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Docm = 12,
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Dotx = 13,
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Dotm = 14,
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Dot = 15,
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}
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public enum SpreadsheetFormat
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{
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Xls = 1,
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Xlsx = 2,
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Html = 6,
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Xlsm = 7,
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Xlt = 8,
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Xltx = 9,
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Xltm = 10,
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Xlsb = 11,
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XmlSpreadsheet2003 = 12,
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Pdf = 13,
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}
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}

‎CS/BusinessObjects/Helpers.cs

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using DevExpress.Spreadsheet;
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using DevExpress.XtraRichEdit;
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using RichEditDocumentFormat = DevExpress.XtraRichEdit.DocumentFormat;
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using RichEditEncryptionSettings = DevExpress.XtraRichEdit.API.Native.EncryptionSettings;
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using SpreadsheetDocumentFormat = DevExpress.Spreadsheet.DocumentFormat;
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using SpreadsheetEncryptionSettings = DevExpress.Spreadsheet.EncryptionSettings;
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namespace RichEditOpenAIWebApi.BusinessObjects
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{
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public static class RichEditHelper
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{
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public static async Task LoadFile(RichEditDocumentServer server, IFormFile file)
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{
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using (var stream = new MemoryStream())
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{
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await file.CopyToAsync(stream);
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stream.Seek(0, SeekOrigin.Begin);
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server.LoadDocument(stream);
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}
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}
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public static Stream SaveDocument(RichEditDocumentServer server, RichEditFormat outputFormat, RichEditEncryptionSettings? encryptionSettings = null)
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{
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MemoryStream resultStream = new MemoryStream();
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if (outputFormat == RichEditFormat.Pdf)
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server.ExportToPdf(resultStream);
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else
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{
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RichEditDocumentFormat documentFormat = new RichEditDocumentFormat((int)outputFormat);
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if (documentFormat == RichEditDocumentFormat.Html)
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server.Options.Export.Html.EmbedImages = true;
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if (encryptionSettings == null)
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server.SaveDocument(resultStream, documentFormat);
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else
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server.SaveDocument(resultStream, documentFormat, encryptionSettings);
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}
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resultStream.Seek(0, SeekOrigin.Begin);
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return resultStream;
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}
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public static string GetContentType(RichEditFormat documentFormat)
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{
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switch (documentFormat)
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{
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case RichEditFormat.Doc:
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case RichEditFormat.Dot:
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return "application/msword";
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case RichEditFormat.Docm:
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case RichEditFormat.Docx:
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case RichEditFormat.Dotm:
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case RichEditFormat.Dotx:
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return "application/vnd.openxmlformats-officedocument.wordprocessingml.document";
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case RichEditFormat.ePub:
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return "application/epub+zip";
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case RichEditFormat.Mht:
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case RichEditFormat.Html:
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return "text/html";
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case RichEditFormat.Odt:
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return "application/vnd.oasis.opendocument.text";
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case RichEditFormat.Txt:
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return "text/plain";
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case RichEditFormat.Rtf:
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return "application/rtf";
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case RichEditFormat.Xml:
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return "application/xml";
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case RichEditFormat.Pdf:
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return "application/pdf";
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default: return string.Empty;
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}
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}
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public static async Task<string> FileToBase64String(IFormFile file)
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{
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using (var stream = new MemoryStream())
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{
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await file.CopyToAsync(stream);
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stream.Seek(0, SeekOrigin.Begin);
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byte[] imageBytes = stream.ToArray();
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return Convert.ToBase64String(imageBytes);
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}
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}
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}
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public static class SpreadsheetHelper
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{
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public static async Task LoadWorkbook(Workbook workbook, IFormFile file)
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{
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using (var stream = new MemoryStream())
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{
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await file.CopyToAsync(stream);
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stream.Seek(0, SeekOrigin.Begin);
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workbook.LoadDocument(stream);
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}
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}
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public static Stream SaveDocument(Workbook workbook, SpreadsheetFormat outputFormat, SpreadsheetEncryptionSettings? encryptionSettings = null)
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{
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MemoryStream resultStream = new MemoryStream();
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SpreadsheetDocumentFormat documentFormat = new SpreadsheetDocumentFormat((int)outputFormat);
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if (outputFormat == SpreadsheetFormat.Pdf)
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workbook.ExportToPdf(resultStream);
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else
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{
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if (encryptionSettings == null)
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workbook.SaveDocument(resultStream, documentFormat);
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else
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workbook.SaveDocument(resultStream, documentFormat, encryptionSettings);
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}
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resultStream.Seek(0, SeekOrigin.Begin);
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return resultStream;
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}
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public static string GetContentType(SpreadsheetFormat documentFormat)
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{
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switch (documentFormat)
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{
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case SpreadsheetFormat.Xls:
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case SpreadsheetFormat.Xlt:
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return "application/msword";
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case SpreadsheetFormat.Xlsx:
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case SpreadsheetFormat.Xlsb:
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case SpreadsheetFormat.Xlsm:
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case SpreadsheetFormat.Xltm:
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return "application/vnd.openxmlformats-officedocument.wordprocessingml.document";
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case SpreadsheetFormat.Html:
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return "text/html";
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case SpreadsheetFormat.XmlSpreadsheet2003:
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return "application/xml";
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case SpreadsheetFormat.Pdf:
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return "application/pdf";
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default: return string.Empty;
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}
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}
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}
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}
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using Azure;
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using Azure.AI.OpenAI;
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using DevExpress.Drawing;
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using DevExpress.Office.Utils;
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namespace RichEditOpenAIWebApi.BusinessObjects {
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class OpenAIClientImageHelper {
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OpenAIClient client;
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internal OpenAIClientImageHelper(string openAIApiKey) {
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client = new OpenAIClient(openAIApiKey, new OpenAIClientOptions());
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}
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string ConvertDXImageToBase64String(DXImage image) {
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using (MemoryStream stream = new MemoryStream()) {
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image.Save(stream, DXImageFormat.Png);
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byte[] imageBytes = stream.ToArray();
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return Convert.ToBase64String(imageBytes);
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}
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}
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internal async Task<string> DescribeImageAsync(OfficeImage image) {
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string base64Content = ConvertDXImageToBase64String(image.DXImage);
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string imageContentType = OfficeImage.GetContentType(OfficeImageFormat.Png);
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return await GetImageDescription($"data:{imageContentType};base64,{base64Content}");
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}
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internal async Task<string> GetImageDescription(string uriString) {
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ChatCompletionsOptions chatCompletionsOptions = new() {
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DeploymentName = "gpt-4-vision-preview",
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Messages =
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{
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new ChatRequestSystemMessage("You are a helpful assistant that describes images."),
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new ChatRequestUserMessage(
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new ChatMessageTextContentItem("Give a description of this image in no more than 10 words"),
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new ChatMessageImageContentItem(new Uri(uriString))),
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},
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MaxTokens = 300
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};
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Response<ChatCompletions> chatResponse = await client.GetChatCompletionsAsync(chatCompletionsOptions);
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ChatChoice choice = chatResponse.Value.Choices[0];
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return choice.Message.Content;
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}
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}
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}

‎CS/BusinessObjects/RichEditExtension.cs

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using DevExpress.XtraRichEdit;
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using DevExpress.XtraRichEdit.API.Native;
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namespace RichEditOpenAIWebApi.BusinessObjects {
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static class RichEditExtension {
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internal static void GenerateAltTextForImages(this IRichEditDocumentServer server, Action<SubDocument> action) {
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Document document = server.Document;
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UpdateSubDocument(document, action);
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foreach (var section in document.Sections) {
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UpdateSectionHeaderFooter(section, HeaderFooterType.Primary, action);
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UpdateSectionHeaderFooter(section, HeaderFooterType.First, action);
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UpdateSectionHeaderFooter(section, HeaderFooterType.Odd, action);
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UpdateSectionHeaderFooter(section, HeaderFooterType.Even, action);
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}
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}
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static void UpdateSectionHeaderFooter(Section section, HeaderFooterType type, Action<SubDocument> action) {
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if (section.HasHeader(type)) {
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SubDocument header = section.BeginUpdateHeader(type);
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UpdateSubDocument(header, action);
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section.EndUpdateHeader(header);
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}
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if (section.HasFooter(type)) {
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SubDocument footer = section.BeginUpdateFooter(type);
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UpdateSubDocument(footer, action);
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section.EndUpdateFooter(footer);
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}
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}
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static void UpdateSubDocument(SubDocument document, Action<SubDocument> action) {
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document.BeginUpdate();
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action(document);
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document.EndUpdate();
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}
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}
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}

‎CS/Controllers/OpenAIController.cs

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using DevExpress.Office.Utils;
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using DevExpress.Spreadsheet;
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using DevExpress.XtraRichEdit;
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using Microsoft.AspNetCore.Mvc;
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using RichEditOpenAIWebApi.BusinessObjects;
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using Swashbuckle.AspNetCore.Annotations;
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using System.Net;
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namespace RichEditOpenAIWebApi.Controllers
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{
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[ApiController]
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[Route("[controller]/[action]")]
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public class OpenAIController : ControllerBase
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{
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string openAIApiKey = "";
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[HttpPost]
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[SwaggerResponse((int)HttpStatusCode.OK, "Download a file", typeof(FileContentResult))]
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public async Task<IActionResult> GenerateImageAltText(IFormFile documentWithImage, [FromQuery] RichEditFormat outputFormat)
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{
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try
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{
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var imageDescriber = new OpenAIClientImageHelper(openAIApiKey);
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using (var server = new RichEditDocumentServer())
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{
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await RichEditHelper.LoadFile(server, documentWithImage);
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server.GenerateAltTextForImages((document) =>
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{
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foreach (var shape in document.Shapes)
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{
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if (shape.Type == DevExpress.XtraRichEdit.API.Native.ShapeType.Picture && string.IsNullOrEmpty(shape.AltText))
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shape.AltText = imageDescriber.DescribeImageAsync(shape.PictureFormat.Picture).Result;
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}
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});
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Stream result = RichEditHelper.SaveDocument(server, outputFormat);
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string contentType = RichEditHelper.GetContentType(outputFormat);
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string outputStringFormat = outputFormat.ToString().ToLower();
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return File(result, contentType, $"result.{outputStringFormat}");
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}
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}
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catch (Exception e)
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{
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return StatusCode(500, e.Message + Environment.NewLine + e.StackTrace);
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}
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}
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[HttpPost]
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[SwaggerResponse((int)HttpStatusCode.OK, "Download a file", typeof(FileContentResult))]
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public async Task<IActionResult> GenerateChartAltText(IFormFile documentWithImage, [FromQuery] SpreadsheetFormat outputFormat)
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{
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try
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{
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var imageDescriber = new OpenAIClientImageHelper(openAIApiKey);
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using (var workbook = new Workbook())
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{
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await SpreadsheetHelper.LoadWorkbook(workbook, documentWithImage);
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foreach (var worksheet in workbook.Worksheets)
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{
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foreach (var chart in worksheet.Charts)
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{
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OfficeImage image = chart.ExportToImage();
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chart.AlternativeText = await imageDescriber.DescribeImageAsync(image);
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}
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}
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Stream result = SpreadsheetHelper.SaveDocument(workbook, outputFormat);
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string contentType = SpreadsheetHelper.GetContentType(outputFormat);
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string outputStringFormat = outputFormat.ToString().ToLower();
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return File(result, contentType, $"result.{outputStringFormat}");
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}
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}
74+
catch (Exception e)
75+
{
76+
return StatusCode(500, e.Message + Environment.NewLine + e.StackTrace);
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}
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}
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}
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}

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