Licensing error

[Pio Luca Valvona]

In a ASP.NET Web forms application I updated the nuget and the update to the latest version of the licensing (v. 31.1) gives me this error:

'System.MissingMethodException' exception

System.String Syncfusion.Licensing.FusionLicenseProvider.GetLicenseType(Syncfusion.Licensing.Platform)

in an EJSIGNATURE object, in the following code:

 function onchange() {

     try {

         var obj = $("#<%=sgFirma.ClientID%>").ejSignature("instance");

         $("#<%=hdf_Firma.ClientID%>").val(obj._canvas[0].toDataURL());

     }

     catch (err) {

         alert(err.name + ":" + err.message);

     }

 }

[Prashanth Sundhar]

Hi Pio,

The error:

Method not found string Syncfusion.Licensing.FusionLicenseProvider.GetLicenseType(Syncfusion.Licensing.Platform)
suggests that your application is referencing a version of Syncfusion.Licensing.dll that does not contain the method GetLicenseType. This typically happens when:

• There's a version mismatch between Syncfusion packages.
• The Syncfusion.Licensing NuGet package wasn't properly updated.
• The old version licensing dll is still being used due to caching or build artifacts.

Here’s a step-by-step guide to resolve this:

1. Ensure All Syncfusion Packages Are on the Same Version

Make sure all Syncfusion NuGet packages, including Syncfusion.Licensing, are updated to exactly version 31.1.*

You can do this by running:

dotnet list package --outdated

Then update all Syncfusion packages:

Eg:

dotnet add package Syncfusion.Licensing --version 31.1.23

2. Clean and Rebuild the Project

Sometimes old DLLs linger in the build folders. Do a full clean:

• Delete bin and obj folders manually.
• Clear NuGet cache:

dotnet nuget locals all –clear

• Rebuild the solution.

3. Verify License Key Registration

Ensure the license key is registered before any Syncfusion component is initialized:

Syncfusion.Licensing.SyncfusionLicenseProvider.RegisterLicense(“YOUR_LICENSE_KEY”);

Overview of Syncfusion license registration - Syncfusion

If you are still facing an issue, we request you to share with us the simplified sample to replicate the issue with us. So that we can assist with you further in this.

Please let us know any concerns.

Regards,

Prashanth S.

[Pio Luca Valvona]

It is not possible to update all packages to the same version, webform is no longer supported

[Vengadesh Kumar]

Hi Pio,

 

Since EJ1 packages deprecated, please upgrade to the equivalent core or Winforms packages for webforms AspNet packages used in your project for v31.1.*

 

Packages used	Equivalent Packages
Syncfusion.OfficeChartToImageConverter.AspNet	Syncfusion.OfficeChartToImageConverter.WinForms
Syncfusion.Pdf.OCR.AspNet	Syncfusion.PDF.OCR.Net.Core
Syncfusion.Pdf.AspNet	Syncfusion.Pdf.Net.Core
Syncfusion.Presentation.AspNet	Syncfusion.Presentation.Net.Core
Syncfusion.PresentationToPdfConverter.AspNet	Syncfusion.PresentationToPdfConverter.WinForms
Syncfusion.XlsIO.AspNet	Syncfusion.XlsIO.Net.Core

 

Please let us know if you have any concerns.

 

Regards,

Vengadesh K