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I get a KeyNotFoundException and don't know how to debug

Hi, in my previous question a workaround for my problem is to have a grouped ListView. So I changed my app's code from nested to grouped ListViews. Now I get the following KeyNotFoundException:...

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How can i hide a button on the toolbar in a single page (contentpage)?

Good morning, how can I make a button in the toolbare visible on all the pages on the page where the button reports is not visible?

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Problem to Accessing Remote Data

Hello everyone my name is Taniguchi and i have this code to connect to dynamics 365 enviromment public MainPage() { InitializeComponent(); } private void PressMeButton_Clicked(object sender, EventArgs...

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Binding Page's Command within ListView of ContentView

Within my ContentView (name=CvProduct) I have a ListView (nam=LvProducts) and several controls within each cells with their specific commands that are accessible in the Page's (name=Products) viewmodel...

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How to pass parameter from Rg.Plugin.Popup to content page?

When I am going to pass parameter from Rg.Plugin.Popup page to a Content page,the content page will reload so how to accept parameters from popup page to content page?

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CollectionView not firing SelectionChangedCommand

I am using FreshMVVM to bind my view models to my views, and all commanding has worked great so far. However, I am not able to get the SelectionChangedCommand to fire when I change the selection of a...

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Xamarin Forms Picker Problem!

I have a problem with my Pickers! If i open a picker in the Android App, but then tap anywhere outside so that it closes, the Picker is not responding anymore, and there is no ability to select it...

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Xamarin.Forms on IOS - DidReceiveRemoteNotification doesn't execute code

In my Xamarin application where I have implemented push-notifications, I have some executeable code in the DidReceiveRemoteNotification function. The function is not being called when I receive a...

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How to get the jks for the lost keystore?

Hi, I have a Xamarin Forms app and I lost my ketstore file Now Google is asking me to follow below steps to recover the keystore but the first command is asking for the jks file Where can I get that...

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Can we override the clickevent for shell?

I'm using the shell in xamarin forms, I want to get the event of the click because I want to return to the rootpage when clicking one of the tab.

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ACR.UserDialogs Splat - Could not be resolved as it was built against...

Hi Since upgrading my version of Visual Studio 2019 to the latest build I have been unable to build my project. Is anyone getting this same message or do you know how to resolve it? I am using Splat...

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The type or namespace name 'Android' does not exist in the namespace...

Hi guys. I Updated my nuget packages few days ago to new versions. but my Android project has 2 errors in MainActivity.cs: 1: The type or namespace name 'Android' does not exist in the namespace...

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Placing a FontImageSource in a ResourceDictionary

I'm trying to add a FontImageSource to a ResourceDictionary so that I can reuse it by referencing a x:Key. Here's what I have tried, but the compiler doesn't like the way I defined the FontImageSource....

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when Archive the xamarin froms android app i get "sequence contains no...

i didn't get any errors while debug mode and release mode clean and build was successful but only Archive the solution only get "sequence contains no matching element" can any one help me out for this.

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Xamarin.Forms parent BindingContext in DataTemplate in the XAML

After few hours of research, I finally found a solution to my problem. I saw that other people had the same problem : I have a listview with a custom viewcell as datatemplate, the contentpage viewmodel...

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why ItemSelected in listview doesnot work sometimes.

I have a listview which displayes images in formA. When i select one image in formA it will go to another form (formB) and if i press back button and come back to formA and i click same image again but...

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Xamarin.Forms and Xamarin.Android files access question

Recently i have been trying to figure a way to get 2 files with heavily typed datasets, and two web references that work perfectly fine in Xamarin.Android, i was able to call them and access their...

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I get a KeyNotFoundException and don't know how to debug

Hi, in my previous question a workaround for my problem is to have a grouped ListView. So I changed my app's code from nested to grouped ListViews. Now I get the following KeyNotFoundException:...

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