Rajesh,
If Expocad supports REST/JSON, I’d highly recommend that you setup a data source in Skuid and use models to get the data.
If Expocad does not suport REST/JSON, then you’ll need to write your own proxy class to talk to Expocad and call it from the Skuid page in a snippet. Here is an example of calling a Salesforce Apex Class.
https://community.skuid.com/t/problem-with-sforce-apex-execute
Thanks,
Bill
