Apply a license key in IronQR

Curtis Chau

Updated: May 9, 2026

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  # Apply a license key in IronQR ## Set your license using code The license key is a long string that ends with an expiry date. Please ensure this is copied correctly, with no spaces. ```txt IronQR-MYLICENSE-KEY-1EF01-RENEW.SUPPORT.01.JAN.2050 ``` The most robust method of applying a license key is directly in your code, before the library is called. --- ## Set your license using Web.Config or App.Config To apply a key globally to your application using `Web.Config` or `App.Config`, add the following key to your config file in `appSettings`. ```xml <configuration> .... <appSettings> <add key="IronQr.LicenseKey" value="IRONQR-MYLICENSE-KEY-1EF01"/> </appSettings> .... </configuration> ``` --- ## Set your license key using a .NET Core appsettings.json file To apply a key globally to your application in a .NET Core application: 1. Add a JSON file to your project called `appsettings.json` in the root directory of your project. 2. Add an `IronQr.LicenseKey` key to your JSON config file. The value should be your license key. 3. Ensure that the file properties include `Copy to Output Directory: Copy always`. File: `appsettings.json` ```json { "IronQr.LicenseKey": "IRONQR-MYLICENSE-KEY-1EF01" } ``` ## Test your key Test if your key has been installed correctly by checking if the license is valid and whether IronQR is licensed successfully. ```csharp // Validate the license key bool result = IronQr.License.IsValidLicense("IRONQR-MYLICENSE-KEY-1EF01"); // Check if IronQR is licensed successfully bool isLicensed = IronQr.License.IsLicensed; // Output the results Console.WriteLine("IsValidLicense: " + result); Console.WriteLine("IsLicensed: " + isLicensed); ```

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Set your license using code

The license key is a long string that ends with an expiry date. Please ensure this is copied correctly, with no spaces.

IronQR-MYLICENSE-KEY-1EF01-RENEW.SUPPORT.01.JAN.2050

IronQR-MYLICENSE-KEY-1EF01-RENEW.SUPPORT.01.JAN.2050

The most robust method of applying a license key is directly in your code, before the library is called.

Set your license using Web.Config or App.Config

To apply a key globally to your application using Web.Config or App.Config, add the following key to your config file in appSettings.

<configuration>
    ....
    <appSettings>
        <add key="IronQr.LicenseKey" value="IRONQR-MYLICENSE-KEY-1EF01"/>
    </appSettings>
    ....
</configuration>

<configuration>
    ....
    <appSettings>
        <add key="IronQr.LicenseKey" value="IRONQR-MYLICENSE-KEY-1EF01"/>
    </appSettings>
    ....
</configuration>

Set your license key using a .NET Core appsettings.json file

To apply a key globally to your application in a .NET Core application:

1. Add a JSON file to your project called appsettings.json in the root directory of your project.
2. Add an IronQr.LicenseKey key to your JSON config file. The value should be your license key.
3. Ensure that the file properties include Copy to Output Directory: Copy always.

File: appsettings.json

{
    "IronQr.LicenseKey": "IRONQR-MYLICENSE-KEY-1EF01"
}

{
    "IronQr.LicenseKey": "IRONQR-MYLICENSE-KEY-1EF01"
}

Test your key

Test if your key has been installed correctly by checking if the license is valid and whether IronQR is licensed successfully.

// Validate the license key
bool result = IronQr.License.IsValidLicense("IRONQR-MYLICENSE-KEY-1EF01");

// Check if IronQR is licensed successfully 
bool isLicensed = IronQr.License.IsLicensed;

// Output the results
Console.WriteLine("IsValidLicense: " + result);
Console.WriteLine("IsLicensed: " + isLicensed);

// Validate the license key
bool result = IronQr.License.IsValidLicense("IRONQR-MYLICENSE-KEY-1EF01");

// Check if IronQR is licensed successfully 
bool isLicensed = IronQr.License.IsLicensed;

// Output the results
Console.WriteLine("IsValidLicense: " + result);
Console.WriteLine("IsLicensed: " + isLicensed);

' Validate the license key
Dim result As Boolean = IronQr.License.IsValidLicense("IRONQR-MYLICENSE-KEY-1EF01")

' Check if IronQR is licensed successfully 
Dim isLicensed As Boolean = IronQr.License.IsLicensed

' Output the results
Console.WriteLine("IsValidLicense: " & result)
Console.WriteLine("IsLicensed: " & isLicensed)

' Validate the license key
Dim result As Boolean = IronQr.License.IsValidLicense("IRONQR-MYLICENSE-KEY-1EF01")

' Check if IronQR is licensed successfully 
Dim isLicensed As Boolean = IronQr.License.IsLicensed

' Output the results
Console.WriteLine("IsValidLicense: " & result)
Console.WriteLine("IsLicensed: " & isLicensed)

Curtis Chau

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Technical Writer

Curtis Chau holds a Bachelor’s degree in Computer Science (Carleton University) and specializes in front-end development with expertise in Node.js, TypeScript, JavaScript, and React. Passionate about crafting intuitive and aesthetically pleasing user interfaces, Curtis enjoys working with modern frameworks and creating well-structured, visually appealing manuals.

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