xamarin.forms - Best practice in Xamarin Forms to perform a filter search -

i need perform filter search dynamic fields , not sure best way this.

we have lot of documents different fields , these used filter search.

can point me in right direction?

if using mvvm pattern. here steps:

• declare observablecollection<itemtype> each of drop down lists in viewmodel.
• create selectedtype1, selectedtype2 etc. properties selected values corresponding each drop down list.
• attach selectionchanged , textchanged method handlers each drop down lists in view updates corresponding selection properties in viewmodel.
• delcare observablecollection<searchresulttype> searchresults in viewmodel holds search results given search.
• declare searchcommand property in viewmodel executes search method.
• declare search method makes web request call or local database search query depending on requirement. search method has access drop down selections/text typed user.
• insert results obtained in search method searchresults collection.
• bind searchresults collection listview.itemssource in view.
• bind searchcommand search action button (top right button in view).

happy coding!