Gridview onclick在对话框模式中，在asp.net中使用bootstrap将值返回到模态父页面webforms

I have spend all day trying and searching how to click in a row in a gridview inside a modal-popup and returns theses values to labels/textboxs on the "father" of the modal-popup, I'm already using javascript to open and closes the modal. The return can be placed in the closeModal(). I just need a example, I have looked in a lot of foruns and pages and didn't find one like this. Thank you for you helpI have spend all day trying and searching how t