Most voted "xamarin-forms" questions
Xamarin.Forms is a cross-platform UI toolkit that allows developers to easily create native user interface layouts that can be shared between Android, iOS and Windows Phone.
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viewsAccessing Mainview from another class
Hello, here is an excerpt from the code of the main class, in it I basically mount and first "Page" with a menu in the footer (I left only a menu button to not get huge the post) <?xml…
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answers127
viewsTwo fields in a Picker - Xamarin Forms
It is possible to have 2 fields in a Picker? Today I have a Category listing and I would like to be able to put the Category Code in front. The XAML code of Picker: <Picker x:Name="pckCategoria"…
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answer94
viewsPass a property to a Label on Xamarin
I need to make the label of my code receive the value of a property. <Grid BackgroundColor="Black"> <Grid.ColumnDefinitions> <ColumnDefinition></ColumnDefinition>…
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answer54
viewsTrial version and production version Android
I’m with the following question about managing Android apps. When will we publish a version on Google Playstore (Android), we have 3 options of choice, being them Alpha, Beta and Production. I…
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viewsHow to separate style sheets using Xamarin Forms
Hello, I am coming from WPF where it is possible to create my style files in separate files and from the same use in my UserControl's the same style settings. I did some (many) searches and found…
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answers370
viewsI don’t know how to use the method of converting images in Xamarin.forms.
I’m developing an app Xamarin.Forms and I’m having difficulty understanding how to fill the parameter to convert an image into byte array, I searched a lot looking for some solution, I found this…
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answer296
viewsError: "Cannot implicitly convert"void" to "Eventhandler"
I was trying to make a button that passed the information of an entry and a Stacklayout and this error appears to me: public MainPage() { InitializeComponent(); Entry entry = new Entry() { Keyboard…
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answers34
viewsPush Notification iOS is not enough. Xamarin
I’m in the following situation, created inside the Apple App a Push Notifications service (Apns), and added it in firebase (Apns authentication key). Everything straight (at least I think it’s just…
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answer264
viewsProblem connecting with MS SQL Server. Same C# code does not work in Xamarin
We are updating the... I was able to access the bank through Android the problem was the port that was not configured. Now there is another question when I do code Debug for android works but if I…
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answers458
viewsError deserializing JSON (JSON array)
I looked for other topics related to this error, but I believe my case is a little different. Error: System.Exception: Error processing request: Cannot deserialize the Current JSON array (e.g.…
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answer119
viewsSobrepor Elementos
Good afternoon I’m new to Xamarin and I’m having trouble overlapping elements. I made a few attempts, but unsuccessfully. <Grid> <Grid.ColumnDefinitions> <ColumnDefinition…
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answers97
views"ROOT ELEMENT IS MISSING" ERROR WHEN TRYING TO DESIRIALIZE XML IN XAMARIN FORMS
public T Exportar<T>(T obj, string nomeArquivo) { try { string file = Global.LocalPasta + nomeArquivo + ".xml"; if (File.Exists(file)) File.Delete(file); using (var stream = new…
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viewsView API call in visual studio
I am starting programming using Xamarin Forms and developing first call using a basic API, I want to see if the call to Endpoint is correct and return of it, there is some screen in Visual Studio…
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answer73
viewsSee External Restapi in Xamarinforms
I am having difficulty to perform a query in an external Tinyerp Restapi to consult and include requests via an app created in my company, some difficulty is to use json because I am new to xamrin…
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answer168
viewsPass multiple attributes to a Command Parameter in Xamarin Forms
I have a function that is a List, I have a button and I wanted to pass 2 parameters from this list to this button to redirect to the next screen, but I do not know how to do this, because…
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answers56
viewsAndroid Binding Library Error: How to make a method return an array of Idictionary <Tkey, Tvalue>?
Hi guys, I would really like someone to help me with this error I’m getting when I import a.Aar file, in an Android Binding Library project, to realize an integration with the service of a little…
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viewsReal-time Oxyplot Graph Problem - Xamarin Forms
I generated a graph on the Oxyplot component in my Xamarin Forms application. I would like to associate the graph drive on the X axis with the other function. Basically, when moving the graph to the…
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viewsHow to Record and Read Files on Android 11(API 30)
When I run the APP and at the time of reading and downloading a PDF file, I get the error of: corrupted or missing file. I know that Android 11(API 30) has problems with external files. This is my…
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answers40
viewsC# Xamarin.Forms
I’m looking for a way to, in a record, correlate state with city through Picker selection. Does anyone help? It’s for Xamarin Forms. Here are the codes: <Entry x:Name="EntryTelefone"…
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answers22
viewsGrid does not fit the screen in Xiaomi
I have a problem a little unusual and I did not find references in the searches I performed. I have a Xamarin Forms application and on the login screen the Grid does not fit the layout getting…
xamarin-formsasked 3 years, 9 months ago Washington Morais 408 -
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answer379
viewsI cannot decrease the size of the APK file
I need to generate my app’s APK in Xamarin fForms, but when I mark the "SDK Assenblies" binding option to decrease the APK, I take the "Unexpected Linkassemblies Task Failure" error. By unchecking…
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answer287
viewsHow to make a Listview in table format in Xamarin Forms?
I need to create a Listview that looks similar to this image, so I have no idea how to do it, because I’ve never used Xamarin, I’m learning in the application that I’m developing.…
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answer375
viewsExit Button Message - Xamarin Forms
I need a message on the Exit Button (I will use the Navigation.PopAsync()) next to what I did but that works (this one doesn’t work): //Botão Sair void BtnSair_Clicked(object sender, EventArgs e) {…
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answer289
viewsSave Date Field to Sqlite and view Date using Datepicker
Hello to the master of Xamarin.Forms Android, I’m trying to record a date in Sqlite, using xzamarin.Forms Android, with a Datepicker, in visual studio 2017, the user must enter the date in the…
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answer36
viewsListview loads items therefore without text
Listview loads items (including for possible editing), but without the item text: […
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answer201
viewsExtension method(Wait() and Status()) does not work
This is not working(just the Wait() and Status lines()) try { string url = $"http://localhost:2710/api/faturamento/{IdUsuario}/{IdGaragem}"; var uri = string.Format(url); var response = await…
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answer18
viewsConfigure "Build Action: Embeddedresource" - Adding font
How do I set up "Build Action: Embeddedresource"? I saw that this option is available by right-clicking the project in the Solution Manager. But this in Visual Studio 2019, the current version does…
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answer113
viewsHow to view in a data listview via web api?
I am having difficulties to accomplish this task, need to fetch data that are stored via mysql on a website and display them on my app being developed on Xamarin Forms, for this I need to make a…
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answers464
viewsHow to sound (beep)? - Xamarin Forms
I need to sound (beep) on the Smartphone to get the user’s attention, I’m testing only by a button initially. The codes I have tested only gives error, the last is being link here. What I did I…
xamarin-formsasked 6 years, 4 months ago Deivid Souza 407 -
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answer112
viewsError "Eventhandler with correct Signature not found"
I have the main page and Contentpage inside the Views folder. Content is successfully loaded. <Tab Title="Entrar In" Icon="enter.png"> <ShellContent ContentTemplate="{DataTemplate…
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answer28
viewsObservablecollection is not populating
I want to popular an Observablecollection to later display when the screen is loaded. Inside my Viewmodel I am setting the data for test, but when I print it has no content. I run Noticeshow() when…
xamarin-formsasked 5 years ago RRV 519 -
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answer124
viewsMy Listview does not show content
Label text on the ListView, I’ve already used the StackLayout and nothing, what could be?…
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answers97
viewsNavigation.Popasync() does not work when used as an option to exit the application
I have a one-screen app, a "Contentpage". I can’t get out of the app with "Popasync()". I’m debugging on a Samsung J6 device. // página instanciada MainPage = new NavigationPage(new Inicio()); //…
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answer602
viewsHow to format a label using Stringformat in Xamarin Forms
I am creating a solution where I must display a whole in one <Label />. To do this I’m using the code below: public partial class Home : ContentPage { public Home() { InitializeComponent();…
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answers86
viewsI need help with Activityindicator in Xamarin.Forms
I have an application that works together with a server, where it needs to fetch some data. When I do this search, it usually takes a certain time and I would like to put a ActivityIndicator while…
xamarin-formsasked 4 years, 10 months ago Renan Mussatto 27 -
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answer52
viewsRemove App from Apple Store
There is an App posted to the Apple Store. I received an order to remove this App as it will go up under another name. How do I remove the App? OBS Remove from Apple Store