Summarizing the Text Content of PDF Documents using Text Analytics with Azure AI services
Environment
| Version | Product | Author |
|---|---|---|
| Q1 2025 | RadPdfProcessing | Desislava Yordanova |
Description
Learn how to summarize the text content of a PDF document using Text Analytics with Azure AI services.
Solution
Follow the steps:
1. Before going further, you can find listed below the required assemblies/NuGet packages that should be added to your project:
- Azure.AI.TextAnalytics
- Telerik.Documents.Fixed
- Telerik.Documents.Core
- Telerik.Zip
2. It is necessary to generate your Azure AI key and endpoint: Get your credentials from your Azure AI services resource
3. Extract the text content from a PDF document.
4. Use the custom implementation to summarize the text content extracted in step 3:
static void Main(string[] args)
{
Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.PdfFormatProvider pdf_provider = new PdfFormatProvider();
Telerik.Windows.Documents.Fixed.FormatProviders.Text.TextFormatProvider text_provider = new TextFormatProvider();
Telerik.Windows.Documents.Fixed.Model.RadFixedDocument document = pdf_provider.Import(File.ReadAllBytes("PdfDocument.pdf"), TimeSpan.FromSeconds(10));
string documentTextContent = text_provider.Export(document);
AzureTextSummarizationProvider summarizationProvider = new AzureTextSummarizationProvider(azure_key, azure_endpoint);
string summary = summarizationProvider.SummarizeText(documentTextContent).Result;
Console.WriteLine(summary);
}
public class AzureTextSummarizationProvider
{
private string languageKey;
private string languageEndpoint;
public AzureTextSummarizationProvider(string azure_key, string azure_endpoint)
{
this.languageKey = azure_key;
this.languageEndpoint = azure_endpoint;
}
public async Task<string> SummarizeText(string text)
{
Azure.AzureKeyCredential credentials = new Azure.AzureKeyCredential(languageKey);
Uri endpoint = new Uri(languageEndpoint);
Azure.AI.TextAnalytics.TextAnalyticsClient client = new Azure.AI.TextAnalytics.TextAnalyticsClient(endpoint, credentials);
// Prepare analyze operation input. You can add multiple documents to this list and perform the same
// operation to all of them.
List<string> batchInput = new List<string>
{
text
};
Azure.AI.TextAnalytics.TextAnalyticsActions actions = new Azure.AI.TextAnalytics.TextAnalyticsActions()
{
ExtractiveSummarizeActions = [new Azure.AI.TextAnalytics.ExtractiveSummarizeAction()]
};
// Start analysis process.
Azure.AI.TextAnalytics.AnalyzeActionsOperation operation = await client.StartAnalyzeActionsAsync(batchInput, actions);
await operation.WaitForCompletionAsync();
System.Text.StringBuilder stringBuilder = new System.Text.StringBuilder();
// View operation status.
stringBuilder.AppendLine($"AnalyzeActions operation has completed");
stringBuilder.AppendLine();
stringBuilder.AppendLine($"Created On : {operation.CreatedOn}");
stringBuilder.AppendLine($"Expires On : {operation.ExpiresOn}");
stringBuilder.AppendLine($"Id : {operation.Id}");
stringBuilder.AppendLine($"Status : {operation.Status}");
stringBuilder.AppendLine();
// View operation results.
await foreach (Azure.AI.TextAnalytics.AnalyzeActionsResult documentsInPage in operation.Value)
{
IReadOnlyCollection<Azure.AI.TextAnalytics.ExtractiveSummarizeActionResult> summaryResults = documentsInPage.ExtractiveSummarizeResults;
foreach (Azure.AI.TextAnalytics.ExtractiveSummarizeActionResult summaryActionResults in summaryResults)
{
if (summaryActionResults.HasError)
{
stringBuilder.AppendLine($" Error!");
stringBuilder.AppendLine($" Action error code: {summaryActionResults.Error.ErrorCode}.");
stringBuilder.AppendLine($" Message: {summaryActionResults.Error.Message}");
continue;
}
foreach (Azure.AI.TextAnalytics.ExtractiveSummarizeResult documentResults in summaryActionResults.DocumentsResults)
{
if (documentResults.HasError)
{
stringBuilder.AppendLine($" Error!");
stringBuilder.AppendLine($" Document error code: {documentResults.Error.ErrorCode}.");
stringBuilder.AppendLine($" Message: {documentResults.Error.Message}");
continue;
}
stringBuilder.AppendLine($" Extracted the following {documentResults.Sentences.Count} sentence(s):");
stringBuilder.AppendLine();
foreach (Azure.AI.TextAnalytics.ExtractiveSummarySentence sentence in documentResults.Sentences)
{
stringBuilder.Append($"{sentence.Text} ");
}
}
}
}
string result = stringBuilder.ToString();
return result;
}
}