IronPrint License Configuration Troubleshooting

ByChaknith Bin

March 19, 2024

Updated June 22, 2025

The problem has been resolved as of IronPrint version 2024.3.6.

# This shell output shows an unhandled exception error due to missing license for IronPrint.
Exception: Unhandled exception. IronSoftware.Exceptions.LicensingException: IronPrint must be licensed for development.

# This shell output shows an unhandled exception error due to missing license for IronPrint.
Exception: Unhandled exception. IronSoftware.Exceptions.LicensingException: IronPrint must be licensed for development.

SHELL

For older IronPrint versions, specifically those released before version 2024.3.6, there is a known licensing issue in:

ASP.NET projects
.NET Framework version >= 4.6.2

The key stored in a Web.config file will NOT be picked up and used by the product.

Workaround

To address this issue, it is recommended to retrieve the license key from the Web.config file using ConfigurationManager in the code, and then apply it to the License.LicenseKey property.

Example:

<configuration>
  ...
  <appSettings>
    <add key="IronPrint.LicenseKey" value="IRONPRINT.MYLICENSE.KEY.1EF01"/>
  </appSettings>
  ...
</configuration>

<configuration>
  ...
  <appSettings>
    <add key="IronPrint.LicenseKey" value="IRONPRINT.MYLICENSE.KEY.1EF01"/>
  </appSettings>
  ...
</configuration>

XML

With the XML file provided above, we can use ConfigurationManager to retrieve the license key value and pass it to the IronPrint.License.LicenseKey property.

using System;
using System.Configuration;

namespace IronPrintLicenseSetup
{
    class Program
    {
        static void Main()
        {
            // Retrieve the license key from the appSettings section of the Web.config file.
            string licenseKey = ConfigurationManager.AppSettings["IronPrint.LicenseKey"];

            // Apply the retrieved license key to the IronPrint's LicenseKey property.
            IronPrint.License.LicenseKey = licenseKey;

            // Notify user that the license key has been applied.
            Console.WriteLine("License Key has been applied successfully.");
        }
    }
}

using System;
using System.Configuration;

namespace IronPrintLicenseSetup
{
    class Program
    {
        static void Main()
        {
            // Retrieve the license key from the appSettings section of the Web.config file.
            string licenseKey = ConfigurationManager.AppSettings["IronPrint.LicenseKey"];

            // Apply the retrieved license key to the IronPrint's LicenseKey property.
            IronPrint.License.LicenseKey = licenseKey;

            // Notify user that the license key has been applied.
            Console.WriteLine("License Key has been applied successfully.");
        }
    }
}

Imports System
Imports System.Configuration

Namespace IronPrintLicenseSetup
	Friend Class Program
		Shared Sub Main()
			' Retrieve the license key from the appSettings section of the Web.config file.
			Dim licenseKey As String = ConfigurationManager.AppSettings("IronPrint.LicenseKey")

			' Apply the retrieved license key to the IronPrint's LicenseKey property.
			IronPrint.License.LicenseKey = licenseKey

			' Notify user that the license key has been applied.
			Console.WriteLine("License Key has been applied successfully.")
		End Sub
	End Class
End Namespace

$vbLabelText $csharpLabel

In the example above, the ConfigurationManager.AppSettings is used to fetch the license key directly from the Web.config. The key is then set as the LicenseKey for the IronPrint component, ensuring the application has the necessary license to run correctly.

Chaknith Bin

Chat with engineering team now

Software Engineer

Chaknith works on IronXL and IronBarcode. He has deep expertise in C# and .NET, helping improve the software and support customers. His insights from user interactions contribute to better products, documentation, and overall experience.