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Merge pull request #1 from SyncfusionExamples/workingbranch
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‎Open-repair-PDF-file-demo/Data/input.pdf‎

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‎Open-repair-PDF-file-demo/Open-repair-PDF-file-demo.csproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<OutputType>Exe</OutputType>
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<TargetFramework>netcoreapp2.1</TargetFramework>
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<RootNamespace>Open_repair_PDF_file_demo</RootNamespace>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="Syncfusion.Pdf.Net.Core" Version="17.3.0.9-beta" />
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</ItemGroup>
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</Project>

‎Open-repair-PDF-file-demo/Open-repair-PDF-file-demo.sln‎

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 16
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VisualStudioVersion = 16.0.29215.179
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Open-repair-PDF-file-demo", "Open-repair-PDF-file-demo.csproj", "{376A64EF-E253-453C-8B3A-BF537D9E4E99}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Release|Any CPU = Release|Any CPU
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{376A64EF-E253-453C-8B3A-BF537D9E4E99}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{376A64EF-E253-453C-8B3A-BF537D9E4E99}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{376A64EF-E253-453C-8B3A-BF537D9E4E99}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{376A64EF-E253-453C-8B3A-BF537D9E4E99}.Release|Any CPU.Build.0 = Release|Any CPU
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {0E6FAB31-44B4-4A1A-AFDC-EAB94D9238A5}
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EndGlobalSection
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EndGlobal

‎Open-repair-PDF-file-demo/Program.cs‎

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using System;
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using System.IO;
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using Syncfusion.Pdf.Parsing;
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namespace Open_repair_PDF_file_demo
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{
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class Program
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{
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static void Main(string[] args)
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{
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using (FileStream pdfStream = new FileStream(@"..\..\..\Data\input.pdf", FileMode.Open, FileAccess.Read))
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{
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//load the corrupted document by setting the openAndRepair flag as true to repair the document
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PdfLoadedDocument loadedPdfDocument = new PdfLoadedDocument(pdfStream, true);
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//Do PDF processing
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//Save the document.
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using (FileStream outputStream = new FileStream(@"result.pdf", FileMode.Create))
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{
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loadedPdfDocument.Save(outputStream);
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}
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//Close the document
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loadedPdfDocument.Close(true);
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}
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}
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}
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}

‎README.md‎

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# find-corrupted-pdf-files-csharp-vb-net
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This repo contains the examples about how to find the corrupted PDF files using Syncfusion's C# PDF library.
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# Easy way to find the corrupted PDF files in C#
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You might have a lot of PDF files in your disc or database; you need to find out the corrupted files and take necessary actions. But it is not possible for you to open every single file with a PDF reader to check whether it is corrupted or not.
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To save your effort and time, [Syncfusion PDF library](https://www.syncfusion.com/pdf-framework/net/pdf-library) provides you the support to identify the corrupted PDF files using C#, VB.NET by checking whether the PDF format syntax are proper.
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Let’s dive into the details about how to find the corrupted PDF files.
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* [PdfDocumentAnalyzer](https://help.syncfusion.com/cr/file-formats/Syncfusion.Pdf.Base~Syncfusion.Pdf.Parsing.PdfDocumentAnalyzer.html) class is used to find the corrupted PDF files by analyzing the PDF document structure and syntax.
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* [AnalyzeSyntax()](https://help.syncfusion.com/cr/cref_files/file-formats/Syncfusion.Pdf.Base~Syncfusion.Pdf.Parsing.PdfDocumentAnalyzer~AnalyzeSyntax.html) method of PdfDocumentAnalyzer class will invoke analysis of the PDF document structure and syntax and returns the result (an instance of [SyntaxAnalyzerResult](https://help.syncfusion.com/cr/file-formats/Syncfusion.Pdf.Base~Syncfusion.Pdf.Parsing.SyntaxAnalyzerResult.html)).
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* [IsCorrupted](https://help.syncfusion.com/cr/cref_files/file-formats/Syncfusion.Pdf.Base~Syncfusion.Pdf.Parsing.SyntaxAnalyzerResult~IsCorrupted.html) property of SyntaxAnalyzerResult is used to identify whether the processed PDF file is corrupted or not.
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Using these APIs, you can ensure that the PDF document is not corrupted and then start processing it.
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For example:
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1. To avoid uploading corrupted any PDF report or resume to your web applications.
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1. To avoid unexpected behavior or hanging when invoking PDF print programmatically.
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The following code example will check whether the given PDF file is corrupted or not.
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```C#
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using Syncfusion.Pdf;
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using Syncfusion.Pdf.Parsing;
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using System;
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using System.IO;
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using System.Text;
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namespace find_corrupted_pdf_file_demo
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{
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class Program
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{
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static void Main(string[] args)
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{
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//Load the PDF file as stream
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using (FileStream pdfStream = new FileStream(“inputFile.pdf", FileMode.Open, FileAccess.Read))
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{
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//Create a new instance of PDF document syntax analyzer.
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PdfDocumentAnalyzer analyzer = new PdfDocumentAnalyzer(pdfStream);
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//Analyze the syntax and return the results
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SyntaxAnalyzerResult analyzerResult = analyzer.AnalyzeSyntax();
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//Check whether the document is corrupted or not
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if (analyzerResult.IsCorrupted)
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{
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StringBuilder strBuilder = new StringBuilder();
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strBuilder.AppendLine("The PDF document is corrupted.");
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int count = 1;
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foreach (PdfException exception in analyzerResult.Errors)
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{
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strBuilder.AppendLine(count++.ToString() + ": " + exception.Message);
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}
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Console.WriteLine(strBuilder);
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}
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else
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{
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Console.WriteLine("No syntax error found in the provided PDF document");
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}
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analyzer.Close();
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}
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}
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}
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}
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```
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‎find-corrupted-pdf-file-demo/PDF-Files/input-open-repair.pdf‎

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‎find-corrupted-pdf-file-demo/Program.cs‎

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using Syncfusion.Pdf;
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using Syncfusion.Pdf.Parsing;
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using System;
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using System.IO;
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using System.Text;
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namespace find_corrupted_pdf_file_demo
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{
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class Program
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{
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static void Main(string[] args)
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{
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//Load the PDF file as stream
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using (FileStream pdfStream = new FileStream(@"..\..\..\PDF-Files\input-open-repair.pdf", FileMode.Open, FileAccess.Read))
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{
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//Create a new instance of PDF document syntax analyzer.
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PdfDocumentAnalyzer analyzer = new PdfDocumentAnalyzer(pdfStream);
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//Analyze the syntax and return the results
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SyntaxAnalyzerResult analyzerResult = analyzer.AnalyzeSyntax();
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//Check whether the document is corrupted or not
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if (analyzerResult.IsCorrupted)
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{
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StringBuilder strBuilder = new StringBuilder();
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strBuilder.AppendLine("The PDF document is corrupted.");
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int count = 1;
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foreach (PdfException exception in analyzerResult.Errors)
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{
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strBuilder.AppendLine(count++.ToString() + ": " + exception.Message);
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}
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Console.WriteLine(strBuilder);
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}
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else
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{
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Console.WriteLine("No syntax error found in the provided PDF document");
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}
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analyzer.Close();
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}
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}
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}
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}

‎find-corrupted-pdf-file-demo/find-corrupted-pdf-file-demo.csproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<OutputType>Exe</OutputType>
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<TargetFramework>netcoreapp2.1</TargetFramework>
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<RootNamespace>find_corrupted_pdf_file_demo</RootNamespace>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="Syncfusion.Pdf.Net.Core" Version="17.3.0.9-beta" />
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</ItemGroup>
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</Project>

‎find-corrupted-pdf-file-demo/find-corrupted-pdf-file-demo.sln‎

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 16
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VisualStudioVersion = 16.0.29215.179
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "find-corrupted-pdf-file-demo", "find-corrupted-pdf-file-demo.csproj", "{C68DBB07-DFA1-4577-B68B-AC5DD96EDE25}"
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{C68DBB07-DFA1-4577-B68B-AC5DD96EDE25}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{C68DBB07-DFA1-4577-B68B-AC5DD96EDE25}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{C68DBB07-DFA1-4577-B68B-AC5DD96EDE25}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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HideSolutionNode = FALSE
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {08941112-DCF5-4CC9-BDA8-86AB29CA3C71}
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EndGlobalSection
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EndGlobal

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