IntelliSense for Client API

• Feb 10, 2026
• 3 minutes to read

DevExpress ASP.NET Controls support IntelliSense for client-side API. This topic describes how to enable IntelliSense depending on the Visual Studio version.

Note

Reporting components ship without definition files for their client-side API members and do not fully support this functionality.

Visual Studio 2022

1. Add the devexpress-web.d.ts , sizzle.d.ts , jquery.d.ts , and knockout.d.ts definition files to the project folder. The last two files contain devexpress-web.d.ts file dependencies.

2. Add the following string to each script file (or script block) where you will use IntelliSense:

3. Call a specific DevExpress client object’s Cast method to enable IntelliSense. For example, for the ASPxClientButton control, call the ASPxClientButton.Cast method.

You can now use IntelliSense to browse available DevExpress ASP.NET client-side API.

Visual Studio 2019

1. Add the devexpress-web.d.ts , sizzle.d.ts , jquery.d.ts , and knockout.d.ts definition files to the project folder. The last two files contain devexpress-web.d.ts file dependencies.

2. For a Web Site project:

3. Call a specific DevExpress client object’s Cast method to enable IntelliSense. For example, for the ASPxClientButton control, call the ASPxClientButton.Cast method.

You can now use IntelliSense to browse available DevExpress ASP.NET client-side API.

How to Use the Cast Method

The Cast method allows you to indicate the type of a client-side control instance, which enables IntelliSense for this type.

You can use this method in the following ways.

• Convert the event source object passed to a client event handler.

• Convert a client object. Use the ClientInstanceName (or ID ) property value to access the client object. For instance, if an ASPxGridView control’s ClientInstanceName property is set to ‘grid’, use the following code to cast the object: