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Parsing HTML in vb.net RRS feed

  • Question

  • Hello,

    I currently write an app which determines the remaining life span of the notebook battery. I also want to publish this app in the Windows Store. My app calls the Windows command "powercfg.exe /batteryreport" to get the status data of the battery. Powercfg.exe creates an HTML file and my app gets the data from this file.

    I wrote a simple HTML parser to read the HTML file generated by Powercfg.exe (using for/next) - but it´s very slow. Is there a better and faster way to parse an HTML file in Visual Basic .net? Or is there a way to find a specific string directly? I use .net Framework 4.6.2.

    Thank you.

    Regards,

    Karsten

    Friday, July 24, 2020 9:07 AM

All replies

  • There is a package that will do this for you

    https://html-agility-pack.net/?z=codeplex


    Lloyd Sheen

    Friday, July 24, 2020 11:25 AM
  • Maybe it is easier to add the /XML option to powercfg command. Then you can use XmlDocument, XDocument, XPath, LINQ to XML.

    For example:

    Imports <xmlns:ns="http://schemas.microsoft.com/battery/2012">

    . . .

    Dim xdoc As XDocument = XDocument.Load("battery-report.xml")

    Dim battery_manufacturer As String = xdoc.<ns:BatteryReport>.<ns:Batteries>.<ns:Battery>.<ns:Manufacturer>.Value

    Friday, July 24, 2020 11:29 AM
  • Thanks for your tips! I managed now to make my HTML parser faster using the InStr function of vb.net.

    Works great! :-)

    Friday, July 24, 2020 5:48 PM
  • Hi Karsten1976,

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    Monday, July 27, 2020 8:52 AM