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Zoom using Wheel Mouse

Thread ID:





75450 Jul 25,2008 05:54 PM UTC Feb 10,2011 09:15 AM UTC ASP.NET Web Forms (Classic) 6
Tags: DiagramWebControl
Matthew Kramer
Asked On July 25, 2008 05:54 PM UTC

Is it possible to use the wheel on a mouse to zoom in and out of a diagram control?

J.Nagarajan [Syncfusion]
Replied On July 29, 2008 11:49 AM UTC

Hi Matt ,

Currently the our DiagramWebControl does not support the MouseWheel event. So you could not zoom in and zoom out when mouse wheeling the DiagramWebControl. DiagramWebControl supports only the client side scroll event.You can handle this event and you can zoom in the DiagramWebControl. Please refer to the below code snippet.

Width="600px" />

var nVal=80;
function Scroll(oData)

Please let me know if this helps.


Replied On February 9, 2011 09:20 AM UTC


Now i am using Syncfusion Essential Studio v Does this version support the zoom functionality (I am using Asp.Net Essentail Diagram - Flow char control) on mouse over?

Thanks in advance.

Replied On February 9, 2011 09:35 AM UTC

I am getting javascript error from above script,
error: _sfDiagramWebControl1 is undefined. Please let me know how do i run this script in my Asp.Net Process Flow diagram control?

Thanks in advance.

Replied On February 9, 2011 09:45 AM UTC

I solved the above issue..after i registered the client object Id in Page_Load event, it works fine.
this.DiagramWebControl1.ClientObjectId = "_sfDiagramWebControl1";

please let me know only this query answer:

Does Syncfusion Essential Studio v version support the zoom functionality (I am using Asp.Net Essentail Diagram - Flow char control) on mouse over?


Bala Murugan A.S [Syncfusion]
Replied On February 10, 2011 03:32 AM UTC

Hi Matt,

Thanks for using Syncfusion Products.

Yes, it is possible to zoom the diagram when we scroll the mouse wheel. Diagram has an event named 'MouseWheelZoom' for zooming. You have to press the control key while scroll the mouse wheel to zoom the diagram.

For your convenience, we have created a simple sample to demonstrate this and the same can be downloaded from the below link


Please let me know if you have any concerns.

Bala Murugan A.S

Replied On February 10, 2011 09:15 AM UTC

Thanks for your update.

Thanks & Regards,


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