Embed Visualization Data Filtered By User Selection Into External Application

Create a layer to make selection on Qlik Sense Apps and fetch data using the standard REST API.  Basically use the .NET SDK to integrate Qlik Sense in the external Windows (.NET) applications.  

https://help.qlik.com/en-US/sense-developer/September2018/Content/Sense_Helpsites/APIs-and-SDKs.htm

https://help.qlik.com/en-US/sense-developer/September2018/Subsystems/NetSDKAPI/Content/Sense_NetSDKAPI/QvNetClient_Reference/Net-Sdk-Reference-Redirect.htm

But the easiest way is to utilize our delivered feature which is mashup.  Create the mashup from Dev-Hub then embed it into external portal.  Here are details:

1.Create mashup to have the content from different visualization, then embed it into the iframe in external portal application's page. 

https://help.qlik.com/en-US/sense-developer/September2018/Subsystems/Mashups/Content/Sense_Mashups/mashups-start.htm

https://help.qlik.com/en-US/sense-developer/September2018/Subsystems/Mashups/Content/Sense_Mashups/mashups-introduction.htm

2.On within the mashup, you can use different types of API to embed visualization, app object, etc.

https://help.qlik.com/en-US/sense-developer/September2018/Subsystems/Mashups/Content/Sense_Mashups/Embed/embed.htm

Two videos:

https://www.youtube.com/watch?v=cnHWT-7HO8o

https://www.youtube.com/watch?v=1rOu0sgvwwM