How to toggle (Expand/Collapse) group data in rdlc

Question

In my rdlc report,I want to show my group data just like this example--

When I click (+) sign group data under the name will expand and When I click (-) sign group data under the name will collapse.I find resources for SSRS report, but nothing useful for rdlc report in recent times.So I followed in my rdlc according to those SSRC report resources if i can get some result.I followed this two specially--

1. SQL Server Reporting Services(SSRS)

2. Expand or Collapse All Grouped Items on SSRS Report

   I took a table.take "GROUP2" as row details.add group parent "GROUP1" for "GROUP2".Like---

I select group properties for "GROUP2" like--

then i set visibility hide for "GROUP2" , checked "display can be toggled by this group item" and select "GROUP1" as item.like--

It gives me report like this--

there is "GROUP1" item visible, "GROUP2" is hidden but no (+) or (-) sign or button to expand or collapse group data.

Any one have any idea,What i am missing? or how can i do this in rdlc report like the top example of this question and also i want to set button for "Expand All" and "Collapse All" for this report.

EDIT: I am using asp.net mvc, web api-2 controller.I am tring to get report in pdf format.

Answer 1

First you need to select your column/row group and select group properties.

And then select the grouping item from your DataSource

There you go:

Before expanding of group

After expanding of group