992090-How to convert a Word document to a thumbnail image without using any third-party NuGet packages.

Word-to-Image-conversion/Convert_Word_to_Thumbnail-Image/.NET/Convert_Word_to_Thumbnail-Image.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.14.36908.2 d17.14
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Convert_Word_to_Thumbnail-Image", "Convert_Word_to_Thumbnail-Image\Convert_Word_to_Thumbnail-Image.csproj", "{B7A7EDE2-1818-4C6A-9DBF-E1DEF995A6C3}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{B7A7EDE2-1818-4C6A-9DBF-E1DEF995A6C3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B7A7EDE2-1818-4C6A-9DBF-E1DEF995A6C3}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B7A7EDE2-1818-4C6A-9DBF-E1DEF995A6C3}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B7A7EDE2-1818-4C6A-9DBF-E1DEF995A6C3}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {ABE93116-3AB5-4CD8-87C0-8C646A6CDC8C}
+	EndGlobalSection
+EndGlobal

Word-to-Image-conversion/Convert_Word_to_Thumbnail-Image/.NET/Convert_Word_to_Thumbnail-Image/Convert_Word_to_Thumbnail-Image.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <RootNamespace>Convert_Word_to_Thumbnail_Image</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Syncfusion.DocIORenderer.Net.Core" Version="*" />
+    <PackageReference Include="Syncfusion.PdfToImageConverter.Net" Version="*" />
+    <PackageReference Include="System.Drawing.Common" Version="*" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Update="Data\Input.docx">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+    <None Update="Output\.gitkeep">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+</Project>

Word-to-Image-conversion/Convert_Word_to_Thumbnail-Image/.NET/Convert_Word_to_Thumbnail-Image/Output/gitkeep.txt

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+

Word-to-Image-conversion/Convert_Word_to_Thumbnail-Image/.NET/Convert_Word_to_Thumbnail-Image/Program.cs

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+using Syncfusion.DocIO;
+using Syncfusion.DocIO.DLS;
+using Syncfusion.DocIORenderer;
+using Syncfusion.Pdf;
+using System.Drawing;
+using Syncfusion.PdfToImageConverter;
+
+namespace Convert_Word_document_to_PDF
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            //Open the Word document file stream. 
+            using (FileStream fileStream = new FileStream(Path.GetFullPath(@"Data/Input.docx"), FileMode.Open))
+            {
+                //Loads an existing Word document.
+                using (WordDocument wordDocument = new WordDocument(fileStream, FormatType.Automatic))
+                {
+                    //Creates an instance of DocIORenderer.
+                    using (DocIORenderer renderer = new DocIORenderer())
+                    {
+                        //Converts Word document into PDF document.
+                        using (PdfDocument pdfDocument = renderer.ConvertToPDF(wordDocument))
+                        {
+                            // Save PDF to memory stream
+                            using MemoryStream pdfStream = new MemoryStream();
+                            pdfDocument.Save(pdfStream);
+                            pdfStream.Position = 0;
+                            //Initialize PDF image converter
+                            PdfToImageConverter imageConverter = new PdfToImageConverter();
+                            //Load the PDF document
+                            imageConverter.Load(pdfStream);
+                            //Convert first page of PDF to image (thumbnail)
+                            Stream thumbnailStream = imageConverter.Convert(0, false, false);
+                            //Reset stream position
+                            thumbnailStream.Position = 0;
+
+                            //Resize image to thumbnail size.
+                            Image image = Image.FromStream(thumbnailStream);
+                            Image thumbnail = image.GetThumbnailImage(600, 700, () => false, IntPtr.Zero);
+
+                            //Save the image.
+                            thumbnail.Save(Path.GetFullPath(@"Output/Image.png"), System.Drawing.Imaging.ImageFormat.Png);
+							thumbnail.Dispose();
+							thumbnailStream.Dispose();
+                            //Close the PDF document
+                            pdfDocument.Close();
+                        }
+                    }
+                }
+            }
+        }
+    }
+}