---
title: "BaseViewer Class"
canonical: https://www.graphicsmill.com/docs/gmwc/T_Aurigma_GraphicsMill_AjaxControls_BaseViewer.htm
archived: true
applies_to:
  - product: "Graphics Mill Web Controls"
---

**You’re viewing documentation for an outdated product.** Graphics Mill Web Controls is no longer part of Graphics Mill. For current design editing and rendering tools, see [Design Atoms .NET](https://customerscanvas.com/docs/on-premises/design-atoms-cs/), [Design Atoms JS](https://customerscanvas.com/docs/on-premises/design-atoms-js/), and [Design Editor](https://customerscanvas.com/docs/on-premises/design-editor/).

# BaseViewer Class

**Applies to:** Graphics Mill Web Controls · **Archived documentation**
 
Base class for all controls which display some content in a browser.
 
**Namespace:** [Aurigma.GraphicsMill.AjaxControls](https://www.graphicsmill.com/docs/gmwc/N_Aurigma_GraphicsMill_AjaxControls.htm.md)
 **Assembly:** Aurigma.GraphicsMill.AjaxControls (in Aurigma.GraphicsMill.AjaxControls.dll)
 
## Syntax
  
```csharp
public abstract class BaseViewer : BaseScriptControl, IPostBackDataHandler, IPostBackEventHandler, IDisposable, ICallbackEventHandler
```
 
## Remarks
  
BaseViewer is an abstract class which implements common functionality for content viewer controls. You cannot instantiate objects of this class directly.
 
## Inheritance Hierarchy
  
- [System..Object](http://msdn2.microsoft.com/en-us/library/e5kfa45b)
    - *+* [System.Web.UI..Control](http://msdn2.microsoft.com/en-us/library/983zwx2h)
        - *+* [System.Web.UI.WebControls..WebControl](http://msdn2.microsoft.com/en-us/library/k1x24e42)
            - *+* [Aurigma.GraphicsMill.AjaxControls..BaseScriptControl](https://www.graphicsmill.com/docs/gmwc/T_Aurigma_GraphicsMill_AjaxControls_BaseScriptControl.htm.md)
                - *+* Aurigma.GraphicsMill.AjaxControls..BaseViewer
                    - *+* [Aurigma.GraphicsMill.AjaxControls..BitmapViewer](https://www.graphicsmill.com/docs/gmwc/T_Aurigma_GraphicsMill_AjaxControls_BitmapViewer.htm.md)
                    - *+* [Aurigma.GraphicsMill.AjaxControls..CanvasViewer](https://www.graphicsmill.com/docs/gmwc/T_Aurigma_GraphicsMill_AjaxControls_CanvasViewer.htm.md)
 
## Thread Safety
 Static members of this type are not safe for multi-threaded operations. Instance members of this type are not safe for multi-threaded operations.
   
## See Also

### Reference

- [BaseViewer Members](https://www.graphicsmill.com/docs/gmwc/AllMembers_T_Aurigma_GraphicsMill_AjaxControls_BaseViewer.htm.md)
- [Aurigma.GraphicsMill.AjaxControls Namespace](https://www.graphicsmill.com/docs/gmwc/N_Aurigma_GraphicsMill_AjaxControls.htm.md)