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Chapter 2 Measurement Studio Measurement Computing Edition .NET Class Libraries
© National Instruments Corporation 2-33 Measurement Studio for MCC User Manual
Switch and LED Controls
Use the Measurement Studio switch and LED controls as Boolean controls
in an ASP.NET Web application. You typically use a switch control to
receive and control Boolean input in an ASP.NET Web application. You
typically use an LED control to indicate a Boolean value in an ASP.NET
Web application. The switch and LED controls are shown in Figure 2-18.
Figure 2-18. Web Forms Switch Control in Vertical Toggle 3D Style and
Web Forms LED Control in Square 3D Style
With the switch and LED controls and the classes that interface with the
controls, you can perform the following operations:
• Receive notification before or after the state of the control changes.
• Specify the image format of the control as BMP, GIF, JPEG, or PNG.
Tip For more information about using the switch and LED controls, refer to the Using
the Measurement Studio Web Forms Switch and LED .NET Controls section in the
NI Measurement Studio Help.
AutoRefresh Control
Use the AutoRefresh control to update a Web control or a group of Web
controls on the client at a specified interval.
The AutoRefresh control renders JavaScript on the client to create a timer
in the browser. When the timer elapses, the AutoRefresh updates the
controls in the AutoRefresh group. For downlevel browsers, the controls
update via postback. For uplevel browsers, the client-side script rendered
by the AutoRefresh control uses a client callback to update the associated
controls on the client without posting the page back to the server.