Rdlc Subreport Header

Question

hello guys.

i'm facing a problem in MS RDLC Report 

i'm using subreport inside my main report. i'm showing the desired result needed. but the problem is with every record of main report the sub report showing tablix header again and again.

 

i want to show header only once in main report not repeated header.is there any way to achieve this ? from report props or programitically ? 

 

i have inserted an image kindly take a look at it. 

 

Thanyou. 

 

 

 

 

i want to show subreport header only once at top