Why is element I declared in XAML unreachable from C# code?

Question

I declare ListView in XAML (MainPage.xaml):

<ListView x:Name="ShoppingListsLV"
              HorizontalOptions="CenterAndExpand"
              Margin="3"/>

And tried to access it from my code (MainPage.xaml.cs):

ShoppingListsLV.ItemsSource = new string[] { "test", "test 2"};

And I have an error:

CS0103: The name ShoppingListsLV does not exist in the current context

Sometimes it happens, don't know the actual route cause, try *re-open VS* and *create new control* — Prashant Pimpale, Dec 15 '18 at 07:01
Check also here-->https://stackoverflow.com/questions/706603/the-name-controlname-does-not-exist-in-the-current-context — Prashant Pimpale, Dec 15 '18 at 07:02

score 1 · Answer 1 · answered Dec 17 '18 at 21:19

Check that you are writing your code after the call:

InitializeComponent();

Also, check that your view is referencing the right code-behind file:

<ContentPage xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" x:Class="YourNamespace.MainPage">

Finally, try to close VS, then go and delete from your projects folders the following ones:

Android - bin

Android - obj

iOS - bin

iOS - obj

This action will clear completely your cache. After this is done, reopen your solution in VS and perform a clear, re-build operation. Your references should be working fine now.

score 0 · Answer 2 · answered Dec 15 '18 at 12:50

0

Change the page Custom Tool property to MSBuild:UpdateDesignTimeXaml where your list exists.

answered Dec 15 '18 at 12:50

Wasif Mahmood Mustafa

577
4
8

score 0 · Answer 3 · answered Dec 15 '18 at 13:58

0

Your code is right, if you see the errors you need to build the app, it should work and you won't see the error anymore.

answered Dec 15 '18 at 13:58

Ivan Ičin

9,672
5
36
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Why is element I declared in XAML unreachable from C# code?

3 Answers3