Convert PDF file to Image in ASP.NET Core

21 Mar 20255 minutes to read

The Syncfusion® PDF to Image converter is a .NET library used to convert PDF document to image in ASP.NET Core application.

Steps to convert PDF document to Image in ASP.NET Core application

• Visual Studio
• Visual Studio Code

Prerequisites:

• Visual Studio 2022.
• Install .NET 8 SDK or later.

Step 1: Create a new C# ASP.NET Core Web Application project.

Step 2: In configuration windows, name your project and select Next.

Step 3: Install Syncfusion.PdfToImageConverter.Net NuGet package as reference to your .NET Standard applications from NuGet.org.

NOTE

If you want to use the PdfToImageConverter in the Linux environment, you need to install the SkiaSharp.NativeAssets.Linux v3.116.1 NuGet package as reference to your applications from NuGet.org.

Step 4: A default controller with name HomeController.cs gets added on creation of ASP.NET Core project. Include the following namespaces in that HomeController.cs file.

C#

using Syncfusion.PdfToImageConverter;

Step 5: Add a new button in index.cshtml as shown below.

C#

@{Html.BeginForm("ExportToImage", "Home", FormMethod.Post);
    {
        <div>
            <input type="submit" value="Convert Image" style="width:150px;height:27px" />
        </div>
    }
    Html.EndForm();
}

Step 6: Add a new action method named ExportToImage in HomeController.cs and include the below code example to convert PDF document to Image using Convert method in PdfToImageConverter class.

C#

//Initialize PDF to Image converter.
PdfToImageConverter imageConverter = new PdfToImageConverter();
//Load the PDF document as a stream
FileStream inputStream = new FileStream("Input.pdf", FileMode.Open, FileAccess.ReadWrite);
imageConverter.Load(inputStream);
//Convert PDF to Image.
Stream outputStream = imageConverter.Convert(0, false, false);
MemoryStream stream = outputStream as MemoryStream;
byte[] bytes = stream.ToArray();
using (FileStream output = new FileStream("output.png", FileMode.OpenOrCreate, FileAccess.ReadWrite))
{
    output.Write(bytes, 0, bytes.Length);
}

Step 7: Build the project.

Click on Build → Build Solution or press Ctrl+Shift+B to build the project.

Step 8: Run the project.

Click the Start button (green arrow) or press F5 to run the app.

Prerequisites:

• Visual Studio Code.
• Install .NET 8 SDK or later.
• Open Visual Studio Code and install the C# for Visual Studio Code extension from the Extensions Marketplace.

Step 1: Open the terminal (Ctrl+` ) and run the following command to create a new ASP.NET Core application

dotnet new mvc -n CreatePdfToImageConvertASPNETCoreAPP

Step 2: Replace **CreatePdfToImageConvertASPNETCoreAPP with your desired project name.

Step 3: Navigate to the project directory using the following command

cd CreatePdfToImageConvertASPNETCoreAPP

Step 4: Use the following command in the terminal to add the [Syncfusion.PdfToImageConverter.Net] (https://www.nuget.org/packages/Syncfusion.PdfToImageConverter.Net) package to your project.

dotnet add package Syncfusion.PdfToImageConverter.Net

NOTE

If you want to use the PdfToImageConverter in the Linux environment, you need to install the SkiaSharp.NativeAssets.Linux v3.116.1 NuGet package as reference to your applications from NuGet.org.

Step 5: A default controller with name HomeController.cs gets added on creation of ASP.NET Core project. Include the following namespaces in that HomeController.cs file.

C#

using Syncfusion.PdfToImageConverter;

Step 6: A default action method named Index will be present in HomeController.cs. Right click on Index method and select Go To View where you will be directed to its associated view page Index.cshtml. Add a new button in the Index.cshtml as shown below.

C#

@{Html.BeginForm("ExportToImage", "Home", FormMethod.Get);
    {
        <div>
            <input type="submit" value="Convert Image" style="width:200px;height:27px" />
        </div>
    }
    Html.EndForm();
}

Step 7: Add a new action method named ExportToImage in HomeController.cs and include the below code example to convert PDF document to Image using Convert method in PdfToImageConverter class.

C#

//Initialize PDF to Image converter.
PdfToImageConverter imageConverter = new PdfToImageConverter();
//Load the PDF document as a stream
FileStream inputStream = new FileStream("Input.pdf", FileMode.Open, FileAccess.ReadWrite);
imageConverter.Load(inputStream);
//Convert PDF to Image.
Stream outputStream = imageConverter.Convert(0, false, false);
MemoryStream stream = outputStream as MemoryStream;
byte[] bytes = stream.ToArray();
using (FileStream output = new FileStream("output.png", FileMode.OpenOrCreate, FileAccess.ReadWrite))
{
    output.Write(bytes, 0, bytes.Length);
}

Step 8: Build the project.

Run the following command in terminal to build the project.

dotnet build

Step 9: Run the project.

Run the following command in terminal to build the project.

dotnet run

By executing the program, you will get the image as follows.