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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viewsHow to create a type of "DIV" in Xamarin Forms
How do I create a component that looks like a div in Xamarin Forms ? I need to create something inside that will have some labels with information referring to the user’s address, and will be…
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answer324
views"You must call Xamarin.forms.init() prior to using it" - Problem trying to access sqlite data
Hello, I’m a beginner in mobile programming and I’m committed to a project PCL Xamarin with Xamarin.Forms. The application uses alarms and for this I use dependency injection to access the native…
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answer43
viewsErrors released on Android are not easily captured in Xamarinforms
I am developing in Xamarinforms a project where I use several APIS downloaded by Nuget, and have not had problems so far. Until then I decided to use the plugin Imagecircle and create a new View in…
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answers534
viewsHow to access view components that are inside a Listview Xamarin Forms
I need to access the properties of the components created on View to set some values (example height and width), but are within a ListView, with that, in the .cs I can’t give This.Component even…
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answer433
viewsCreate a new instance every time you use Navigationpage in Xamarin Forms?
Let’s assume that I have 3 screens in Xaml and I use the SterDetailPage and Navigationpage to navigate between these screens back and forth. Page A -> Page B -> Page C -> ... I use…
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answers140
viewsDifferent Hamburger Menu
I’m trying to make a menu this way (see image), but do not know how it works right ... If anyone can send me an example or help me in this matter, I would appreciate it very much.…
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answer567
viewsIncrease the "text box" of the <Editor /> in Xamarin Forms
Save people! Would you know how to increase the text space in the Editor />" in Xamarin Forms? In the same way that we can increase an input /> in HTML with padding ? I appreciate any attempt.…
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answer93
viewsRepeat Stacklayouts according to Xamarin Forms list
I created a StackLayout with a labels inside that I need to display some information on them. With that, I need it charged StackLayouts and completed the labels according to the amount of records on…
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answers116
viewsHow to make this layout in Xamarin
What structure should I use to make this layout? Is a listView or gridView, I don’t know how to do this part of SOUND, when I put the listView, appears only bottom align, top not!…
xamarin xamarin-forms xamarin.android xamarin.portableasked 7 years, 3 months ago Eduardo F. Santos 449 -
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viewsSignal receipt of messages
When I receive 1 or more messages, for example, in the What’s App, let’s say I received 3 messages. On top of the icon of the what’s app, there is an orange "ball" with the number 3, in reality the…
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answer101
viewsXamarin Forms - How to make Datime.Now dynamic?
How to make the Datime.Now. dynamic on Xamarin Forms ? I need time to keep running. In this case it’s stopped. I have a Label that captures the data of a class Label Text="{Binding data}"…
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answer673
viewsCreate popup with Rg.Plugins.Popup
Does anyone know any tutorial for creating popup on Xamarin.Forms using this plugin, Rg.Plugins.Popup? I need to create a popup and inside it a textbox or textarea with two buttons (Ok and Cancel).…
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answer164
viewsDragging Listview item
Would anyone happen to know how to drag a Listview item one way or the other? Preferably a way that serves Cross-Platform Android/IOS
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answer32
viewsHow to use resource files in XAML (Xamarin) file
I’m trying to use resource aquifers in my Xamarin Forms project but I don’t know how to reference the file string. Ex: <Label Text="MyApp.Resources.MinhaString" />. Someone knows how to do?…
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answers14
viewsAdd new csproj in Xamarin.Forms project
I need to create another csproj in my Solution Xamarin.Forms. Should I create another PCL? I think so. Create one of Windows I don’t think it works, right? I did it and came Buttons and etc. What do…
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answer645
viewsHow to add an icon to the button on Xamarin?
Guys, I came across a silly thing here more that left me Arrado, I would like to put an icon on a button inside the layout of my application, so I’m not able to do, below the code of my button...…
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answer81
viewsHow to create the ATTACHMENT field in a form in Xamarin Forms?
I have a form being developed in a mobile application, one of the fields will have to capture an attachment. I know how to do in html using the input, so what would be the attribute to do this using…
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answer40
viewsHtttpurlconnection functions missing in Xamarin Forms development (Java System Conversion to C#)
I have a system developed in Android Studio and am passing to Xamarin Forms in C# and this happening some errors that I am not able to solve Summarizing what my system does: It takes the html page…
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answer80
viewsIncompatibility problems with BLE Plugin with Xamarin project
I installed a plugin in my application Xamarin Forms and I’m having incompatibility problems: BLE Plugin 1.3.0 was Restored using . Netframework v4.6.1 Instead of the project target framework .…
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answer767
viewsNewtonsoft.Json.Jsonreaderexception When making a POST
I’m having trouble doing the post in my API my app up to register the object but then it locks the application and closes with this error of execution: Newtonsoft.Json.Jsonreaderexception:…
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answer577
viewsWhat is the best solution for a web login api in Xamarin Forms?
i have the following challenge to solve, I am developing an app using xamarin forms, this application will have to communicate with a website developed in PHP to consume your data, for all functions…
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answer136
viewsCreate and show a badge on an Xamarin page
I use Xamarin.Forms(Net Standard) and am having difficulty creating a badge and showing its value. I have a page (Tabbed Page) that has a Grid with 8 cells. Each cell has an image and each image…
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answers24
viewsError publishing UWP to WINDOWS STORE
I’m having the following error when publishing to Windows store (microsoft). API Createfilew in kernel32.dll is not supported for this application type. Mysql.Data.dll calls this API How to remove…
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answer1199
viewsPhysical back button in Xamarin Forms
I need to be clicked on the Back button of the Smartphone to be returned to the previous page. Note: If possible do not use Navigation to not have the bar up there.
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answer480
viewsGet error message in Httpclient Post
I have a WCF Service on a server whose service is also configured as Webinvoke: [WebInvoke( Method = "POST", UriTemplate = "/work", BodyStyle = WebMessageBodyStyle.WrappedResponse, ResponseFormat =…
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answer43
viewsDoubt about Xamarin-Forms
Good night, I am starting a TCC project with development for mobile platform and my group we are developing using the platform Xamarin Forms, my doubt is about the creation of the project, because…
c# xamarin xamarin-forms xamarin.android xamarin.iosasked 6 years, 6 months ago Giovanni B. Preivatti 55 -
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answer151
viewsHow to open a cshtml local webview in Xamarin Forms
I have a project in Asp net mvc and another in Xamarin Forms, I need to call in my project Xamarin Forms a Webview Local but the page is as cshtml (Asp net)
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viewsWhere can I enable IOS Keychain in Xamarin/vs?
i am using Xamarin Forms and trying to use Xamarin. Auth to save information in the device database.. For android I did this and everything right... But when I run IOS I have this mistake... >…
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answer614
viewsLogin with Facebook at Xamarin Forms
I am developing an App using Xamarin.Forms and I need to use the Facebook authentication system. what happens is that when I debug it I get an error message saying: Unable to load URL: The domain of…
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answer59
viewsNavigation between pages (Android)
using Android.App; using Android.Widget; using Android.OS; using System; namespace ValModas { [Activity(Label = "ValModas", MainLauncher = true)] public class MainActivity : Activity { protected…
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answers252
viewsUppercase letter in a Searchbar - Xamarin Forms
I need to have the capital letter in a Searchbar, the code that I managed to do that seemed closer to reality is this below, but it did not work: //Pesquisa localmente a cada letra digitada private…
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answers243
viewsDeclare a List<string> and display in xaml
I am trying to make a List string in Xamarin , this list auto increments according to an attribute being declared true; public bool TemPão { get; set; } public bool TemBife { get; set; } public bool…
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answer186
views(CS0029) convert a List into Observablecollection || Sqlite
I’m trying to create a method that returns a ObservableCollection in place of a Listin the Sqlite namespace Projeto_03.DataBase { public class TarefasDataAccess { private SQLiteConnection _database;…
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answer430
viewsError "max res 25, Skipping mipmap-anydpi-v26" - Xamarin Forms
am having the following error while running my app in Visual Studio 2017: max res 25, Skipping mipmap-anydpi-v26 I searched here on the Internet and found nothing that could help me solve it. Does…
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answers122
viewsError accessing JSON - Xamarin Forms
On the LOGIN button of my app when clicked it looks for Json information, on my Macbook with Genymotion is accessed normally, but when I will use the same code in Windows (tested on two of them)…
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answer92
viewsNuget Paint Package or Digital Signature
Is there any nuget package that allows you to make digital signature drawing by screen, or even a nuget that is something like a Paint where you can draw on the screen and save as an image?
xamarin xamarin-forms visual-studio-2017 nugetasked 6 years, 5 months ago Lucas Riechelmann Ramos 521 -
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answer484
viewsError "The name "Initializecomponent" does not exist in the current context" in every Xamarin project.
Out of nowhere, ALL my projects are making the mistake The name "Initializecomponent" does not exist in the current context (CS0103) When created. I don’t need to change anything, the error comes…
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answers46
viewsVisual Studio 2017 Oledb Xamarin.Forms
Guys I’m in need of help in the following, I’m doing a cross-platform project using Visual Studio 2017 and Xamarin.Forms, the problem is: I need to make a connection to MS Access Database. I’ve seen…
database mobile xamarin-forms ms-access visual-studio-2017asked 6 years, 4 months ago Crash_Override 11 -
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answers100
viewsMy App does not load list of items
I have a App Xamarin.Formsthat consumes two services rest. The first service, consumes normally. However, the second, that I need to pass a parameter, this is not being consumed. I’ve tried several…
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answers220
viewsFormat a Decimal Type Field and Inlcuir in Xamarin Sqlite Forms with Android
Hello to the Masters of Xamarin Forms, I have a little problem, for you maybe very simple. I am not able to format a decimal type field in monetary value and then do the same Insert in Sqlite. Below…
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answers20
viewsError uploading with Firebasestorage.net with Xamarin
I developed the following routine to upload images. var task = new FirebaseStorage("xxxxxx.appspot.com") .Child("data") .Child("random") .Child("file.png") .PutAsync(img); When I try to send I get…
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answer279
viewsBold highlight a concatenated item
I would like to highlight in bold a part of the text that is in the Displayalert notification. DisplayAlert("Alerta", "Deseja realmente incluir o lance de valor de R$ " + EntryLance.Text + "?",…
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answer45
viewsXamarin - Camera does not work
I developed a web application. However, in the Webview that I created from this application, when I try to upload files, the code redirects me to the image gallery instead of opening the camera of…
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answer307
viewsView JSON data in Listview
Guys as I load a Listview with the result of a method that returns an object already loaded with JSON? Method that loads object with JSON namespace MeuProjeto.ViewModels.jsonModels { class JSON {…
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answers953
viewsCreate an Android App Bundle with Xamarin Forms
When I try to publish a Xamarin.Android app on the Android developer console I get the following warning message that won’t let me publish the app: In this case how could I create an optimized APK,…
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answers38
viewsView from the Masterdetail
How do I display Masterdetail above Toolbar? An example of what I want is the Masterdetail of the Play Store app that even appears in the bar that is the time. <?xml version="1.0"…
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answer1630
viewsXamarin How to change the Menu and Selected Item color?
How to change the Blue colors of the "selected item" and menu in Xamarin? See images: Menu Selection in the Menu I tried to Change directly in the Home view (The page that appears as the main one),…
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answer506
viewsXamarin: Pass data from selected item in a Listview to another Screen
How do I pass selected data from one screen to another in Xamarin? I have a Listview that receives the information from an Api and I want the user to click on the item, view this information on…
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answer101
viewsHow to create a hamburger menu with a Mainpage inheriting from Tabbedpage?
I’m having a hard time creating a menu hamburger because my MainPage inherits from TabbedPage. There is a way to do this with a TabbedPage? To create this menu, we usually create two new…
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answer47
viewserror using waitActivityIndicator, how to resolve?
I am making a connection via web api in my application, so it is not accepting the use of "waitActivityIndicator", indicates that it does not exist in the current context, below my code, someone…