How to scan a file for viruses using C# in .NET Framework

Cloudmersive

Sep 20, 2019·2 min read

Any time you work with user-submitted content, whether in forums, mobile apps, or support, the threat of viruses always looms in the background. A danger to both your company and your other customers, these digital nuisances must be dealt with decisively. Today we will be looking at how to do just that with a minimum of work. Let’s dive in.

First, run this code snippet in Package Manager’s console, which will install the API client that we will be using.

Install-Package Cloudmersive.APIClient.NET.VirusScan -Version 1.2.9

Now we simply feed the questionable file into the ScanFile function.

using System;
using System.Diagnostics;
using Cloudmersive.APIClient.NET.VirusScan.Api;
using Cloudmersive.APIClient.NET.VirusScan.Client;
using Cloudmersive.APIClient.NET.VirusScan.Model;namespace Example
{
    public class ScanWebsiteExample
using System;
using System.Diagnostics;
using Cloudmersive.APIClient.NET.VirusScan.Api;
using Cloudmersive.APIClient.NET.VirusScan.Client;
using Cloudmersive.APIClient.NET.VirusScan.Model;namespace Example
{
    public class ScanFileExample
    {
        public void main()
        {
            // Configure API key authorization: Apikey
            Configuration.Default.AddApiKey("Apikey", "YOUR_API_KEY");
            // Uncomment below to setup prefix (e.g. Bearer) for API key, if needed
            // Configuration.Default.AddApiKeyPrefix("Apikey", "Bearer");var apiInstance = new ScanApi();
            var inputFile = new System.IO.Stream(); // System.IO.Stream | Input file to perform the operation on.try
            {
                // Scan a file for viruses
                VirusScanResult result = apiInstance.ScanFile(inputFile);
                Debug.WriteLine(result);
            }
            catch (Exception e)
            {
                Debug.Print("Exception when calling ScanApi.ScanFile: " + e.Message );
            }
        }
    }
}

And voila! We are done. This function’s speed is proportional to the size of the file, but is generally rather quick. There is a separate function that can scan websites for potential threats as well.