Version Specific Upgrade Notes

Version specific documentation for upgrading to new major versions of Umbraco Forms.

This page covers specific upgrade documentation for when migrating to major 8 and 10 of Umbraco Forms.

If you are upgrading to a new minor or patch version, you can find information about the breaking changes in the Release Notes article.

Version Specific Upgrade Notes History

Version 10.1

Breaking changes

  • The default theme has been updated to render captions for field types that support prevalues. If you have created any custom themes, please review the default theme and ensure you make similar changes to make use of the new feature.

  • The method PreValues on the FieldViewModel type has been changed from a collection of strings to a collection of a PrevalueViewModel object that has a Value and Caption property.

  • In order to fix an issue with display and editing of values, we've found a need to ensure the property representing the fields a record entry used in the backoffice is changed from a list of values to a structure containing the field Ids and values. Specifically, EntrySearchResult.Fields has changed type IEnumerable<object?> to IEnumerable<EntrySearchResult.FieldData>. The only scenarios affected by this would be anyone handling the EntrySearchResultFetchingNotification notification or developing custom export types.

Version 10

Version 10 of Umbraco Forms has a minimum dependency on Umbraco CMS core of 10.0.0. It runs on .NET 6.

To migrate to version 10, you should first update to the latest minor release of version 9. If you are upgrading from Umbraco 8, update Forms to the latest minor version of Forms 8. Ensure you have the configuration in place for storing form definitions in the database. For more information, see the Umbraco Forms in the Database (legacy) article.

Either way will ensure you have all the database schema changes in place.

Views and client-side files

Umbraco 10 distributes the views and client-side files as part of a Razor class library, distributed in the Umbraco.Forms.StaticAssets package. This means these assets are no longer individual files available on disk. The advantage of this approach is that that avoids changes made to them by solution developers being inadvertently lost when the project is rebuilt.

When upgrading from Forms 9, you should either first run a dotnet clean, or, after installing Forms 10, delete the App_Plugins/UmbracoForms folder. This will ensure there aren't two copies of the package.manifest file, which would cause issues by registering duplicate property editors.

For views you should also remove the following folders and files (again, either via a dotnet clean before upgrading, or manually afterward):

  • /Views/MacroPartials/InsertUmbracoFormWithTheme.cshtml

  • /Views/MacroPartials/RenderUmbracoFormScripts.cshtml

  • /Views/Partials/Forms/

If you have custom themes or other changes to the files in the Views/Partials/Forms folder, you should ensure those files remain.

For example, with a custom email template, remove the file Example-Template.cshtml from the /Views/Forms/Emails folder but keep any custom templates.

Similarly, if you have a custom theme, remove the default and bootstrap3-horizontal folders from the /Views/Partials/Forms/Themes/ folder but keep any custom theme folders.

Breaking changes

Version 10 contains a number of breaking changes. We do not expect many projects to be affected by them as they are in areas that are not typical extension points. For reference though, the full details are listed here.


  • Renamed the configuration option to allow editable form submissions on the front-end to AllowEditableFormSubmissions (fixing the typo in the previous value of AllowEditableFormSubmissions).


  • DatabaseIntegrityHealthCheck has an altered constructor taking an additional parameter.

  • The EventExtensions class is no longer used since V9 and has been removed.

  • Static events from BaseFileStorage removed and replaced with notifications.

  • IFormTemplateStorage along with its implementation in FormTemplateStorage and base classes have been simplified, as templates are the only file based storage now in use, and there are no methods necessary for this other than reading.

  • The method GetScaffold has been removed from FormController, as it's not called from the UI.

  • The following classes have altered constructors taking additional parameters, with obsolete versions removed.

    • RecordController

    • FormSecurityController

    • FormSecurityTreeController

    • PostToUrl

    • WorkflowEmailService

  • The public fields on the Setting class have been converted to properties.

  • The methods GetMemberCacheKey and GetMemberValuesCacheKey on CacheKeys taking an integer parameter have been removed.

  • The method GetUserSecurity on IUserSecurityStorage has been amended to take an integer parameter rather than an object.

  • The method StringExtensions.DetectIsJson has been removed (the equivalent exists in CMS).

  • Obsoleted methods in FieldConditionEvaluation have been removed.

  • The following unused classes have been removed:

    • FormEventArgs

    • FolderEventArgs

    • FieldPreValueSourceEventArgs

    • FormDataSourceEventArgs

    • WorkflowEventArgs

    • BaseStorageEventArgs Additional methods have been added to the following interfaces:

    • IRecordStorage

    • IRecordFieldValueStorage

    • IUserSecurityStorage

    • IUserFormSecurityStorage

    • IFormsSecurity

  • Additional properties of SupportsMandatory and EditType have been added to the IFieldType interface.

  • The obsoleted method RegenerateFieldSetAndFieldIds on Form has been removed.

  • The constructor of FolderNotificationHandler had an unused parameter removed.

  • The obsolete and unused methods CanCurrentUserEdit, CanCurrentUserAddInEditor, CanCurrentUserManageWorkflows, EnsureUserExists and CanCurrentUserExport were removed from the IFormSecurity interface.

  • The type parameter TEventArgs defined on IBaseService (and derived interfaces) has been removed.

  • Database migration classes inheriting from FormsMigrationBase now use the non-obsolete base constructor defined on PackageMigrationBase.

  • The methods on IPlaceholderParsingService have been combined into a single one with optional parameters.

  • The method PostSave on FormSecurityController has been renamed to PostSaveForUser.

  • The backoffice model class FormSecurity has been renamed to FormSecurityForUser.

  • The unused class NonSerialiazableTypeSurrogateSelector was removed.

  • The unused method ImportXmlNodeFromText on XmlHelper was removed.

  • IFormService.FormExist was renamed to IFormService.FormExists.

  • EntrySearchResultCollection.schema was capitalized.

  • Base class ExportType has a constructor taking IHostEnvironment instead of IHostingEnvironment.

  • Typo was fixed in the class name of TempDataDictionraryExtensions.

  • The SetFormThemeCssFile extension method had an unused variable removed.

  • Some method signatures have had appropriate modifications for nullable reference type support.

  • Removed BaseFileStorage, BaseFileSystemStorage and FormsFileSystemForPackageData as they are no longer needed following changes to support distribution of assets in a razor class library.

Version 8.13

See notes under 10.1.

Version 8

Version 8 of Umbraco Forms has a minimum dependency on Umbraco CMS core of 8.0.0 and runs on .NET Framework 7.2.

In order to upgrade from Umbraco Forms 7 to Umbraco Forms 8, you can use any of these options:


In order to upgrade you will want to download the version of Forms you wish to upgrade to. Instead of downloading the actual package, however, you want to download the file (where x.y.z) is the version.

The filename ends with and contains only the files that get installed when you install Umbraco Forms.


The easiest way to proceed is to unzip the file you downloaded and copy and overwrite (almost) everything into your website. Almost, because you might not want to overwrite ~/App_Plugins/UmbracoForms/UmbracoForms.config because you might have updated it in the past. Make sure to compare your current version to the version in the zip file you downloaded. If there's any new configuration options in there then copy those into your website's UmbracoForms.config file.

Legacy version specific upgrade notes

You can find the version specific upgrade notes for versions out of support in the Legacy documentation on Github.

Last updated