Blank View with two grids.

Grid 1 I have a 

Row Select Event Function set to "getDetail" function defined in file 

blank-1.view.component.ts

public getDetail(e){
    console.log(e.selectedRows[0].dataItem.tch_contnum);
}
as you can see - im able to get the Grid1 selected contnum
How can I populate Grid2 using the selected contnum?