How to child node checkbox will be checked when parent node checkbox will be checked

[Sudip_inn]

i have two questions

1) suppose my treeview has checkbox. parent node has many nested child. when parent node checkbox will be checked then all nested child node checkbox will checked. how to do it?

2) if parent node checkbox will be checked then child node checkbox will be checked and user will not be able to uncheck any checkbox of child node checkbox?

please guide me how to achieve it by code example. thanks

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