value and onChange needs to be part of Form.Control (as a prop). You have put them as children and hence the issue. ... <看更多>

If you need to access the value of an uncontrolled <FormControl> , attach a ref to ... Select aria-label="Default select example"> <option>Open this select ... ... <看更多>

Now I get the ref of "FormControl select", and print the value of ... Currently following the React-Bootstrap forms templating from here. ... <看更多>

web api react-bootstrap dropdown display data and get the selected item. ... <看更多>