CODEWITHSUNDEEP
c#xamarinevent-handlingcustom-controlsxamarin.forms
Arti
Arti

Reputation: 3071

Custom event in Xamarin.Forms

I was trying to add a custom event to my custom control in Xamarin.Forms. Please take a look at the code below:

public delegate void ImageSelectedHandler(object sender, EventArgs e);
public static event ImageSelectedHandler OnImageSelected;

private void OnImageBtnTapped(object sender, EventArgs e)
{
   if (OnImageSelected != null) 
   {
        OnImageSelected(sender,e);
   }
}

In the page which is using the control:

SelectMultipleBasePage<ListItems>.OnImageSelected += ListPage_OnImageSelected;

void ListPage_OnImageSelected(object sender, EventArgs e)
{
  //code here
}

I could access the event by using the above code. But I would like to use the control on different pages. On different pages different OnImageSelected even will behave differently. And hence I would like to have something like this:

SelectMultipleBasePage<ListItems> multiPage = new SelectMultipleBasePage<ListItems>(items);
multiPage.OnImageSelected += ListPage_OnImageSelected;

But when I do that I get error:

Cannot be accessed with an instance reference; qualify it with a type name instead

What am I doing wrong in accessing the event?

Upvotes: 1

Views: 3248

Answers (1)

Sven-Michael St&#252;be
Sven-Michael St&#252;be

Reputation: 14750

Just remove the static.

public event ImageSelectedHandler OnImageSelected;

Then you can call

SelectMultipleBasePage<ListItems> multiPage = new SelectMultipleBasePage<ListItems>(items);
multiPage.OnImageSelected += ListPage_OnImageSelected;

Of course you have to change the static call, too.

Upvotes: 1

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