Hello All, I'm working on LabVIEW NXG to develop a web application and I'm finding it quite difficult when compared to labview. I'm unable to use certain functions in the web vi. I require reading and writing to config files in this application which is not available in labview nxg. Also, there's no split string function using a delimiter and I made an attempt on writing a Javascript code. The 1d string array output is not supported in the Javascript Library Interface and I'm left with no clue about what to do next. Kindly help me with your ideas. Thanks, Sruthi Sudhagar.

Hi Sruthi, The important thing to understand is your webVI is not running on the server. It is downloaded to your computer when you go to the page on the server and runs on your computer. See the diagram below. This means that the webVI can't access the files on the server because it isn't running on the server. Instead you need another bit of software - or you need to extend the web server software to provide the information about the files to the webVI. Since web servers and clients talk HTTP anyway this is the most common method by far. Exactly how to do that is a large topic itself! And probably depends on what web server you are running. If it is just reading the file - you may be able to add it to the web server's configuration to serve that file and don't need to do any coding. You could use a LabVIEW Web Service as the web server which serves your webVI and also has LabVIEW endpoints where you can write code that executes on the server when the webVI sends requests to specific endpoints. LabVIEW Web Services are different from WebVIs as they are code to run on the server - not on the client. This architecture is known as a single page application in the web world. I've been trying to find a simple explanation that doesn't assume you know the way it used to be done but I've struggled! This is a reasonable attempt though: What is a Single Page Application | Bloomreach

Hi Sruthi, There is a "Search/Split String" function available in webVIs. You can use it in a loop and split until you have all the matches. I'm attaching an example VI which does it.

LabVIEW Web Development Discussions

Web VI - write to a file and jsli

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Dear James,

Thank you for your reply.

The explanation is very clear and this helps me a lot while thinking about taking the next step.

Regards,

Sruthi Sudhagar.

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LabVIEW Web Development Discussions

Web VI - write to a file and jsli

Re: Web VI - write to a file and jsli