Member Avatar for rubenrav

Hello

I'm planning a programming project for my website.

I have a device that logs information to a database. To access this database I need to use to OLEDB client. What i want to do is, to make a graphical widget to my website that shows the info of my device. I want the widget to update every minute.

I want the widget to show a light, depending on the information at the device, like a traffic light. I'm familiar with c# and know this will do the program task, but i need something that gives me graphic to the website depending on the database, like output from methods in the c# files.

Any one that can help me out here?

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  • Latest Post Latest Post by Ramesh S
Member Avatar for Ramesh S

Hi,

If you just want to show different light color based on the information logged into database by the device, you can just try to use <img> html tag with images for each color. Try the following steps:

  1. Display an image in <img> tag in an asp.net page. Have images for each color based on the device information.

  2. Since the information is continously updated in the database by the device, Write a method to get the latest information via web service in asp.net.

  3. Use an Ajax timer and call the web services from client script (JavaScript) in the AJAX-enabled ASP.NET Web page. Update the image link in the <Img> tag using javascript based on the informatin received from the webservice .

Check the following links to know more about calling web services from javascript asynchronously using asp.net ajax.

http://www.asp.net/ajax/documentation/live/Overview/AsynchronousLayerOverview.aspx
http://msdn.microsoft.com/en-US/library/bb515101.aspx

http://www.aspsnippets.com/Articles/Make-AJAX-Call-to-ASP.Net-Server-Side-Web-service-method-using-jQuery.aspx

If you want to dislay a more dynamic chart graph, you can try to use ASP.NET chart control. Refer the following links.

http://www.microsoft.com/en-us/download/details.aspx?id=22000
http://archive.msdn.microsoft.com/mschart

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