A data source instance has not been supplied for the data source“Product_Detail” in Microsoft reporting service

Question

I`m trying to display record in a Report. Data is in the Dataset. but it is not binind to them. When forms load it shows it report layout. But when i click on the button it show

Answer 1

With respecting to the existing answers, I came across this issue today in VS2015 Professional and fixed it by navigating to Form1.cs (Design), using the action arrow selected the correct datasource and rebind in the end. Please see the image below and follow red, green and purple indications accordingly to see my solution steps.