Questions on UI for Xamarin Forum

2 answers

85 views

Forms 2.3

HI,

When do you intend supporting Forms 2.3 or are you waiting for 2.3.1 to be released?

2.2 has Margin support for Entry missing which is fixed in 2.3.

Thanks.

General Discussions

answered on 08 Jul 2016

3 answers

101 views

RadCartesianChartView Live Update

Hello,

Kindly help on how to update RadCartesianChartView data/datasource every 100ms. I couldn't find any sample implementation in the downloaded package(UI for Xamarin Q2 2015\Examples\Android) that updates data.

Also, I will like to see a sample implementation of ChartSeriesDataSource.

Thanks

Chart

answered on 06 Jul 2016

2 answers

121 views

Error CS0117: `Uurwerk.Droid.Resource.Animation' does not contain a definition for `design_bottom_sheet_slide_in'

After successfully integrating the Telerik UI for Xamarin Calendar component into my Xamarin App I am trying todo the same for my Android version. However after adding the 'Telerik.UI.for.Xamarin' nuget package I get a lot (2580) build errors all looking similar to this:

`Uurwerk.Droid.Resource.Animation' does not contain a definition for `design_bottom_sheet_slide_in' (CS0117)

I have closely followed the 'Getting started' guide provided by Telerik and made sure all versions of the dependencies are as specified in the 'Required Android Support Libraries' guide (see packages.config contents below).

The application builds (and runs) fine without the reference to 'Telerik.UI.for.Xamarin' (obviously without using the calendar control). What am I doing wrong? Help would be greatly appreciated.

Contents of "packages.config":

<?xml version="1.0" encoding="utf-8"?>

<packages>

<package id="HockeySDK.Xamarin" version="4.1.0-beta3" targetFramework="MonoAndroid60" />

<package id="MvvmCross" version="4.2.0" targetFramework="MonoAndroid60" />

<package id="MvvmCross.Binding" version="4.2.0" targetFramework="MonoAndroid60" />

<package id="MvvmCross.Core" version="4.2.0" targetFramework="MonoAndroid60" />

<package id="MvvmCross.Platform" version="4.2.0" targetFramework="MonoAndroid60" />

<package id="Telerik.UI.for.Xamarin" version="2016.2.614.1" targetFramework="MonoAndroid60" />

<package id="Xamarin.Android.Support.Animated.Vector.Drawable" version="23.3.0" targetFramework="MonoAndroid60" />

<package id="Xamarin.Android.Support.v4" version="23.3.0" targetFramework="MonoAndroid60" />

<package id="Xamarin.Android.Support.v7.AppCompat" version="23.3.0" targetFramework="MonoAndroid60" />

<package id="Xamarin.Android.Support.v7.RecyclerView" version="23.3.0" targetFramework="MonoAndroid60" />

<package id="Xamarin.Android.Support.v8.RenderScript" version="23.3.0" targetFramework="MonoAndroid60" />

<package id="Xamarin.Android.Support.Vector.Drawable" version="23.3.0" targetFramework="MonoAndroid60" />

<package id="Xamarin.Forms" version="2.2.0.31" targetFramework="MonoAndroid60" />

</packages>

General Discussions

answered on 05 Jul 2016

5 answers

194 views

Duplicate symbol errors

Hi,

I downloaded the last version of the Telerik.Xamarin.iOS.dll and it gets me a lot of "Duplicate symbol error" (103 errors).

Example;

Native linking failed, duplicate symbol: '_llvm.cmdline'

Duplicate symbol in: ...../mtouch-cache/TelerikUI.a(TKChartAnnotation.o) (Location related to previous error)

Duplicate symbol in: ...../mtouch-cache/TelerikUI.a(TKChartMedianPriceIndicator.o) (Location related to previous error)

Before this library, I worked wothout problemes with an older version of the library (wich was several mb ligther).

I apreciate your help.

Thanks!

General Discussions

answered on 05 Jul 2016

1 answer

86 views

Could not find file moldova-flag.imageset\MD-1.png

I have purchased UI for Xamarin.iOS and downloaded the latest commercial version 2016.2.513.

The following errors are displayed when opening the Telerik UI for Xamarin iOS 2016_2_513 Examples solution:

[Failure] Could not find file 'X:\Telerik_UI_for_Xamarin_iOS_2016_2_513_dev\Examples\Images.xcassets\Flags\ moldova-flag.imageset\MD-1.png'.
[Failure] Could not find file 'X:\Telerik_UI_for_Xamarin_iOS_2016_2_513_dev\Examples\Images.xcassets\Flags\ moldova-flag.imageset\Contents.json'.
[Failure] Could not find file 'X:\Telerik_UI_for_Xamarin_iOS_2016_2_513_dev\Examples\Images.xcassets\Flags\ moldova-flag.imageset\MD.png'.

See attached screenshot which shows that there are two folders named "moldova-flag.imageset". The first one is prefixed with a space. This folder is empty. The second folder contains the correct flag images.

The folder with the leading space is added by Visual Studio. It does not exist in the original zip file.

Where in the Examples solution can I change the reference to remove the leading space from the folder name?

General Discussions

answered on 30 Jun 2016

10 answers

224 views

XAML based chart not working

I'm trying to create multiple charts inside a listview but the chart isn't showing up. I'm not sure why. The backing data is there. Here is the code I'm using:

<?xml version="1.0" encoding="utf-8" ?>

<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"

xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"

x:Class="Mobile.Views.WatchListPage"

xmlns:infrastructure="clr-namespace:Mobile.Infrastructure;assembly=Mobile"

xmlns:telerik="clr-namespace:Telerik.XamarinForms.Chart;assembly=Telerik.XamarinForms.Chart"

xmlns:viewModel="clr-namespace:Mobile.ViewModels;assembly=Mobile"

Title="DHT1">

<ContentPage.Resources>

<ResourceDictionary>

<Style x:Key="FriendlyNameStyle" TargetType="Label">

<Setter Property="FontSize" Value="16"></Setter>

<Setter Property="FontFamily" Value="Open Sans"></Setter>

</Style>

<Style x:Key="ValueStyle" TargetType="Label">

<Setter Property="FontSize" Value="18"></Setter>

<Setter Property="FontFamily" Value="Open Sans"></Setter>

<Setter Property="FontAttributes" Value="Bold"></Setter>

</Style>

<Style x:Key="MinorText" TargetType="Label">

<Setter Property="FontSize" Value="14"></Setter>

<Setter Property="FontFamily" Value="Open Sans"></Setter>

<Setter Property="TextColor" Value="Gray"></Setter>

</Style>

</ResourceDictionary>

</ContentPage.Resources>

<ContentPage.Content>

<StackLayout Orientation="Vertical" Padding="0" Spacing="0">

<SearchBar x:Name="ParameterSearch" Placeholder="Search parameters" Text="{Binding ParameterSearchText}"></SearchBar>

<infrastructure:CustomListView x:Name="ParameterLv" SeparatorVisibility="Default" RowHeight="50">

<ListView.ItemTemplate>

<DataTemplate>

<ViewCell>

<StackLayout Orientation="Horizontal" HorizontalOptions="FillAndExpand" Spacing="0">

<ContentView Padding="5, 0, 5, 0">

<Image Source="{Binding StatusImg}"></Image>

</ContentView>

<StackLayout Orientation="Vertical">

<Label Text="{Binding FriendlyName}" Style="{StaticResource FriendlyNameStyle}"></Label>

<Label Text="{Binding TagId}" Style="{StaticResource MinorText}"></Label>

</StackLayout>

<telerik:RadCartesianChart x:Name="ParameterChart" HorizontalOptions="FillAndExpand">

<telerik:RadCartesianChart.BindingContext>

<viewModel:ParameterViewModel/>

</telerik:RadCartesianChart.BindingContext>

<telerik:RadCartesianChart.HorizontalAxis>

<telerik:NumericalAxis/>

</telerik:RadCartesianChart.HorizontalAxis>

<telerik:RadCartesianChart.VerticalAxis>

<telerik:NumericalAxis />

</telerik:RadCartesianChart.VerticalAxis>

<telerik:RadCartesianChart.Series>

<telerik:ScatterLineSeries ItemsSource="{Binding TrendTail}">

<telerik:ScatterLineSeries.XValueBinding>

<telerik:PropertyNameDataPointBinding PropertyName="Time"/>

</telerik:ScatterLineSeries.XValueBinding>

<telerik:ScatterLineSeries.YValueBinding>

<telerik:PropertyNameDataPointBinding PropertyName="Value"/>

</telerik:ScatterLineSeries.YValueBinding>

</telerik:ScatterLineSeries>

</telerik:RadCartesianChart.Series>

</telerik:RadCartesianChart>

<StackLayout Orientation="Vertical" Padding="0, 0, 5, 0">

<Label Text="{Binding Value}" Style="{StaticResource ValueStyle}"></Label>

<Label Text="{Binding Unit}" Style="{StaticResource MinorText}" HorizontalTextAlignment="Center" VerticalTextAlignment="Start"></Label>

</StackLayout>

</ViewCell>

</DataTemplate>

</ListView.ItemTemplate>

</infrastructure:CustomListView>

</StackLayout>

</ContentPage.Content>

</ContentPage>

namespace Mobile.ViewModels

{

using ReactiveUI;

public class ParameterViewModel : ReactiveObject

{

private string _friendlyName;

public string FriendlyName

{

get { return _friendlyName; }

set { this.RaiseAndSetIfChanged(ref _friendlyName, value); }

}

private string _tagId;

public string TagId

{

get { return _tagId; }

set { this.RaiseAndSetIfChanged(ref _tagId, value); }

}

private string _statusImg;

public string StatusImg

{

get { return _statusImg; }

set { this.RaiseAndSetIfChanged(ref _statusImg, value); }

}

private string _value;

public string Value

{

get { return _value; }

set { this.RaiseAndSetIfChanged(ref _value, value); }

}

private string _unit;

public string Unit

{

get { return _unit; }

set { this.RaiseAndSetIfChanged(ref _unit, value); }

}

private TrendData[] _trendTail;

public TrendData[] TrendTail

{

get { return _trendTail; }

set { this.RaiseAndSetIfChanged(ref _trendTail, value); }

}

private decimal _reference;

public decimal Reference

{

get { return _reference; }

set { this.RaiseAndSetIfChanged(ref _reference, value); }

}

public class TrendData : ReactiveObject

{

private decimal _value;

public decimal Value

{

get { return _value; }

set { this.RaiseAndSetIfChanged(ref _value, value); }

}

private decimal _time;

public decimal Time

{

get { return _time; }

set { this.RaiseAndSetIfChanged(ref _time, value); }

}

Does anyone know what I'm doing wrong? Or have any questions about my implementation?

Chart

answered on 29 Jun 2016

3 answers

108 views

Calendar Blank

I'm trying to get the calendar to display within a ContentPage using code behind. I'm not using XAML. The display is completely blank. What am I missing?

public class CalendarPage : ContentPage
{
public CalendarPage ()
{
Content = new RadCalendar()
{
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalOptions = LayoutOptions.FillAndExpand,
DisplayDate = DateTime.Today,
BackgroundColor = Color.Navy,
GridLinesColor = Color.White,
};

}
}

Thanks,

Blair

Calendar & Scheduling

answered on 24 Jun 2016

1 answer

276 views

Object reference not set to an instance of an object

I have a CarouselPage with three ContentPage.

In each ContentPage I have a RadPieChart. I have a refresh button on the toolbar that read the data and refresh all the pie charts.

If I press the refresh button on the first or on the second ContentPage all is ok.

If I press the refresh button on the third page I have this error:

Object reference not set to an instance of an object

Can you help me???

The call stack is:

at Telerik.XamarinForms.ChartRenderer.Android.PieChartRenderer.SeriesInternal_CollectionChanged (System.Object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e) [0x00028] in <filename unknown>:0
at (wrapper delegate-invoke) <Module>:invoke_void_object_NotifyCollectionChangedEventArgs (object,System.Collections.Specialized.NotifyCollectionChangedEventArgs)
at System.Collections.ObjectModel.ObservableCollection`1[T].OnCollectionChanged (System.Collections.Specialized.NotifyCollectionChangedEventArgs e) [0x00012] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/System/compmod/system/collections/objectmodel/observablecollection.cs:288
at System.Collections.ObjectModel.ObservableCollection`1[T].OnCollectionChanged (NotifyCollectionChangedAction action, System.Object item, Int32 index) [0x00000] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/System/compmod/system/collections/objectmodel/observablecollection.cs:351
at System.Collections.ObjectModel.ObservableCollection`1[T].InsertItem (Int32 index, System.Collections.ObjectModel.T item) [0x00024] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/System/compmod/system/collections/objectmodel/observablecollection.cs:219
at Telerik.XamarinForms.Chart.ElementsCollection`1[T].InsertItem (Int32 index, Telerik.XamarinForms.Chart.T item) [0x0001b] in <filename unknown>:0
at System.Collections.ObjectModel.Collection`1[T].Add (System.Collections.ObjectModel.T item) [0x00023] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/collections/objectmodel/collection.cs:67
at MobileCRM.Shared.DashboardView+<>c__DisplayClass2_0.<.ctor>b__1 (System.Collections.Generic.List`1 datiAttivita) [0x00360] in D:\Prj3rd\OndaCRMApp\Client\MobileCRM.Shared\Pages\Home\DashboardView.xaml.cs:212
at Xamarin.Forms.MessagingCenter+<>c__DisplayClass4_0`1[TSender].<Subscribe>b__0 (System.Object sender, System.Object args) [0x00027] in C:\BuildAgent3\work\aad494dc9bc9783\Xamarin.Forms.Core\MessagingCenter.cs:54
at Xamarin.Forms.MessagingCenter.InnerSend (System.String message, System.Type senderType, System.Type argType, System.Object sender, System.Object args) [0x00069] in C:\BuildAgent3\work\aad494dc9bc9783\Xamarin.Forms.Core\MessagingCenter.cs:95
at Xamarin.Forms.MessagingCenter.Send[TSender] (Xamarin.Forms.TSender sender, System.String message) [0x00013] in C:\BuildAgent3\work\aad494dc9bc9783\Xamarin.Forms.Core\MessagingCenter.cs:23
at MobileCRM.Shared.DashboardViewModel+<ExecuteLoadSeedDataCommand>d__6.MoveNext () [0x00a03] in D:\Prj3rd\OndaCRMApp\Client\MobileCRM.Shared\ViewModels\Home\DashboardViewModel.cs:128
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128
at System.Runtime.CompilerServices.TaskAwaiter.GetResult () [0x00000] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:113
at MobileCRM.Shared.DashboardViewModel+<<get_LoadSeedDataCommand>b__5_0>d.MoveNext () [0x0001f] in D:\Prj3rd\OndaCRMApp\Client\MobileCRM.Shared\ViewModels\Home\DashboardViewModel.cs:45
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143
at System.Runtime.CompilerServices.AsyncMethodBuilderCore.<ThrowAsync>m__0 (System.Object state) [0x00000] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/AsyncMethodBuilder.cs:1018
at Android.App.SyncContext+<Post>c__AnonStorey0.<>m__0 () [0x00000] in /Users/builder/data/lanes/3340/4e275588/source/monodroid/src/Mono.Android/src/Android.App/SyncContext.cs:18
at Java.Lang.Thread+RunnableImplementor.Run () [0x0000b] in /Users/builder/data/lanes/3340/4e275588/source/monodroid/src/Mono.Android/src/Java.Lang/Thread.cs:36
at Java.Lang.IRunnableInvoker.n_Run (IntPtr jnienv, IntPtr native__this) [0x00009] in /Users/builder/data/lanes/3340/4e275588/source/monodroid/src/Mono.Android/platforms/android-23/src/generated/Java.Lang.IRunnable.cs:81
at (wrapper dynamic-method) System.Object:10380bda-a7f1-45e5-8e3f-7465ce556290 (intptr,intptr)

Chart

answered on 23 Jun 2016

4 answers

226 views

ListView - LongPress and UIMenuController

Hi,

I have 2 questions about TKListView :

1 - Is it possible to keep both behaviours LongPress and Press on a listView cell ?

I want a "normal" action on Press and a "Special' action on the long press (which will be described in point 2)

2 - So the action i want on long press is displaying a custom context menu (UIMenuController) with my own set of actions.

Can TKListView answer YES and if so, HOW to my questions ?

Regards,

ListView - Xamarin.iOS

answered on 17 Jun 2016

13 answers

1.6K+ views

How to install Telerik UI for Xamarin on Mac OSX

I use Xamarin Studio on Mac with a Xamarin Indi license. I tried to download the Telerik UI for Xamarin and got a MSI file which is meant for Windows. Is there a way, I can install the Telerik UI for Xamarin Plugin on Mac?

Thanks

-Surya

General Discussions

answered on 17 Jun 2016