how to refresh one component from another component?

Question

Hi i have two components A&B. In A i am having a dropdown which contains car models.In B i am having one more dropdown contain model year.If I am selecting a car from dropdown A the available year associated with that selected car will display.All are working fine but im facing one issue that from B if i am changing any particular year A component not refreshing immediatly .Aftr page reload only am getting the new values.How i can solve this.Ngonint call is not a good way because i am having enough methodes inside that?please help

Bhairab Dutt · Answer

Hi Karthik,
If you are using Parent and Child compoent concepts then you can use the Output decorator with EventEmitter in child compoent and pass the year value to first componet .
Now first compoent will refresh the value select the car according to selected year.
Hope Its help you.
Thanks

Sujeet Raman · Answer

how i can give in angular 4 dropdown

Yogesh Ghorpade · Answer

Apply Autopostback=true In Both Dropdown