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Error: "The type or name 'JavaScript' does not exist in the namespace 'Syncfusion' - are you missing an assembly reference? "

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Problem

The compilation error "The type or name 'JavaScript' does not exist in the namespace 'Syncfusion' -are you missing an assembly reference?" in *.aspx.designer.cs file.

Error

Reason

This error occurs when the Syncfusion assemblies are not referred in the web application.

Solution

To resolve the issue, refer to the corresponding assemblies for adding Syncfusion ASP.NET controls in the web applications as given in the following link,

https://help.syncfusion.com/aspnet/getting-started/manual-integration-of-syncfusion-aspnet-controls#assembly-reference

In order to render the controls, you have to add the required script files and CSS files in your application. You can follow the steps given in the UG documentation link as follows:

https://help.syncfusion.com/aspnet/getting-started/manual-integration-of-syncfusion-aspnet-controls#adding-required-css-files

 

https://help.syncfusion.com/aspnet/getting-started/manual-integration-of-syncfusion-aspnet-controls#adding-the-required-javascript-files 

Note:

A new version of Essential Studio for ASP.NET is available. Versions prior to the release of Essential Studio 2014, Volume 2 will now be referred to as a classic versions.The new ASP.NET suite is powered by Essential Studio for JavaScript providing client-side rendering of HTML 5-JavaScript controls, offering better performance, and better support for touch interactivity. The new version includes all the features of the old version, so migration is easy.

The Classic controls can be used in existing projects; however, if you are starting a new project, we recommend using the latest version of Essential Studio for ASP.NET. Although Syncfusion will continue to support all Classic Versions, we are happy to assist you in migrating to the newest edition.

For current customers, you can check out our components from the License and Downloads page. If you are new to Syncfusion, you can try our 30-day free trial to check out our other controls. If you have any queries or require clarifications, please let us know in the comments section below.

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