migrating from 2017 to latest issues....

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General Discussions

sambi asked on 18 Mar 2025, 03:26 PM

I know, it's a big leap but I was assigned this old application. Obviously, a lot of things have changed.

currently we are using:

bundles.Add(new ScriptBundle("~/bundles/kendo").Include(
string.Format("~/Scripts/kendo/{0}/jszip.min.js", KendoVersion),
string.Format("~/Scripts/kendo/{0}/kendo.all.min.js", KendoVersion),
string.Format("~/Scripts/kendo/{0}/kendo.aspnetmvc.min.js", KendoVersion)));

and

bundles.Add(new StyleBundle(string.Format("~/Content/kendo/{0}/css", KendoVersion)).Include(
string.Format("~/Content/kendo/{0}/kendo.common-bootstrap.min.css", KendoVersion),
string.Format("~/Content/kendo/{0}/kendo.custom.css", KendoVersion)))

I noticed none of the Content files are around anymore, or the jszip.min.js

Are there new files to replace these with?

I assume, even if there are, there will be code changes involved. correct?

I started out trying to update Bootstrap to the latest, but I don't think the 2017 version of kendo was playing well with it.

Thanks in advance.

1 Answer, 1 is accepted

answered on 21 Mar 2025, 09:01 AM

Hi Sambi,

Thank you for the details provided.

Since you are upgrading from a very old version consider going through the breaking changes that happened in the last releases. Refer to the Breaking Changes documentation, where we list the changes per release:

There have been major changes throughout the 2022 and 2023 releases, so you won't be able to upgrade without coming across these changes. The latest big change is the drop of the LESS themes in R1 2023 SP1 (version 2023.1.314). Going forward, the old LESS theme will not be compatible with the new versions of Telerik UI for ASP.NET MVC and migrating to the SASS themes is recommended. We have a migration article which explains the process in more detail:

https://www.telerik.com/aspnet-mvc/documentation/styles-and-layout/less-themes/less-themes-migration

The article above provides information about removing the common files.

As updating an old project is a very complex task, I would recommend using Telerik Professional Services if needed. The professional Services Team usually covers the complete update of the old version projects.

Kind Regards,
Anton Mironov
Progress Telerik

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