xaml - Binding Command/Attribute To Element in C#? -

i'm trying implement xlabs cameraviewmodel functionality xamarin forms app. unfortunately, given example uses xaml bind views data, need in code behind.

the following code used select picture , it's source.

public class cameraviewmodel : xlabs.forms.mvvm.viewmodel {     ...     private imagesource _imagesource;     private command _selectpicturecommand;      public imagesource imagesource     {         { return _imagesource; }         set { setproperty(ref _imagesource, value); }     }      public command selectpicturecommand     {                 {             return _selectpicturecommand ?? (_selectpicturecommand = new command(             async () => await selectpicture(),() => true));         }     }     ... } 

and these commands bound xaml :

<button text="select image" command="{binding selectpicturecommand}" /> <image source="{binding imagesource}" verticaloptions="centerandexpand" /> 

how can apply same commands in code-behind created elements?

cameraviewmodel viewmodel = new cameraviewmodel();  var take_button = new button{ }; take_button.setbindings(button.commandproperty, //*???*//);  var source_image = new image { }; source_image.setbinding(image.sourceproperty, //*???*//); 

i've binded selectpicturecommand doing following:

take_button .command = viewmodel.selectpicturecommand; 

however have doubts being correct way, , same logic cannot applies imagesource.

for button have:

var take_button = new button{ }; take_button.setbinding(button.commandproperty, new binding { path = nameof(viewmodel.selectpicturecommand), mode = bindingmode.twoway, source = viewmodel}); 

for image have:

var source_image = new image { }; source_image.setbinding(image.sourceproperty, new binding { path = nameof(viewmodel.imagesource), mode = bindingmode.twoway, source = viewmodel });