Questions on UI for Xamarin Forum

1 answer

18 views

RadBusyIndicator - maintain ScrollView Y position.

Hi,

I have a problem, with maintaining ScrollY position of ScrollView after RadBusyIndicator gets disabled:

I have following XAML structure:

    <telerik:RadBusyIndicator>
        <telerik:RadBusyIndicator.Content>
            <ScrollView>
                <StackLayout>
                    .....
                </StackLayout>
           </ScrollView>
        </telerik:RadBusyIndicator.Content>
    </telerik:RadBusyIndicator>

At the very end of StackLayout I have a button that triggers some action and RadBusyIndicator needs to be shown, but when RadBusyIndicator gets Disabled (IsBussy = false) ScrollView go to the very top without triggering Scrolled event in ScrollView.

How to persist scroll position when using RadBusyIndicator ?

BusyIndicator

answered on 19 Feb 2024

1 answer

389 views

Error when building Xamarin project on iOS

Hi, I'm getting the following error when building my Xamarin.Forms project on iOS. Weirdly enough it was working fine the other day and now it consistently gives me this error. The application itself launches on iOS but half the pages are missing and some pages are missing components.

The type initializer for 'Telerik.XamarinForms.SkiaSharp.SkiaPainter' threw an exception.
Exception of type 'System.Exception' was thrown.
Telerik.XamarinForms.Common
at Telerik.XamarinForms.Common.NativeResourceProvider.ToPlatformPixels (System.Double dip) [0x00000] in <c043edb38e3c40609bb9cbd0df9066be>:0
at Telerik.XamarinForms.SkiaSharp.SkiaPainter.UpdateExpectedPpxToDpRatio () [0x00000] in <5c673afa45f14dd59e1a272b3f01ee1a>:0
at Telerik.XamarinForms.SkiaSharp.SkiaPainter..cctor () [0x00017] in <5c673afa45f14dd59e1a272b3f01ee1a>:0

at (wrapper managed-to-native) System.Object.__icall_wrapper_mono_generic_class_init(intptr)
at Telerik.XamarinForms.Primitives.RadPath..ctor () [0x0001b] in <38c0677356f14f22a10877afa8da8671>:0
at Telerik.XamarinForms.Primitives.Animation1.CreatePath (System.Int32 figuresCount, System.Double thickness) [0x0005d] in <38c0677356f14f22a10877afa8da8671>:0
at Telerik.XamarinForms.Primitives.Animation1..ctor (Xamarin.Forms.Color color) [0x00049] in <38c0677356f14f22a10877afa8da8671>:0
at Telerik.XamarinForms.Primitives.AnimationFactory+<>c.<.cctor>b__1_0 (Xamarin.Forms.Color p) [0x00000] in <38c0677356f14f22a10877afa8da8671>:0
at Telerik.XamarinForms.Primitives.AnimationFactory.CreateAnimation (Telerik.XamarinForms.Primitives.AnimationType animationType, Xamarin.Forms.Color color) [0x00019] in <38c0677356f14f22a10877afa8da8671>:0
at Telerik.XamarinForms.Primitives.RadBusyIndicator.PrepareAnimations () [0x00029] in <38c0677356f14f22a10877afa8da8671>:0
at Telerik.XamarinForms.Primitives.RadBusyIndicator..ctor () [0x0002d] in <38c0677356f14f22a10877afa8da8671>:0

BusyIndicator

General Discussions

answered on 08 Sep 2021

1 answer

87 views

Hello, may I ask, how can the speed of animation 6 be adjusted?

Hello, how do you adjust the speed of animation 6 in the BusyIndicator control?

BusyIndicator

answered on 28 Jul 2021

1 answer

59 views

BusyIndicator control animation speed

Hello, how do you adjust the speed of animation 6 in the BusyIndicator control?

BusyIndicator

answered on 28 Jul 2021

20 answers

701 views

Error when using BusyIndicator

Hello, When i'm creating a new instance of the RadBusyIndicator I get this error:

Constructor on type Telerik.XamarinForms.Primitives/Animation-1 not found

BusyIndicator

answered on 01 Mar 2021

3 answers

288 views

How to show it like a modal popup

Could you please guide me in how to show the busy indicator in full screen mode (like modal popups) preventing the user to tap or doing something in the screen until I close it?

BusyIndicator

answered on 08 Jan 2021

5 answers

120 views

Animation and message

I would like to have a message display along with the animation to let my users know exactly what is going on. But it looks like I can use EITHER the animation OR text and not both.

For instance, this displays ONLY my label:

<telerik:RadBusyIndicator IsBusy="{Binding IsBusy}" HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand"

AnimationContentColor="{StaticResource Primary}" AnimationType="Custom">

<telerik:RadBusyIndicator.Content>

<ScrollView>

<StackLayout>

<Label StyleClass="Heading1" Text="{Binding Title}"/>

<Label Text="{Binding CreateDateasString}" StyleClass="Small"/>

<ui:HtmlTextView x:Name="Desc" Html="{Binding Description}" />

</StackLayout>

</ScrollView>

</telerik:RadBusyIndicator.Content>

<telerik:RadBusyIndicator.BusyContent>

<Label Text="{Binding BusyMessage}"/>

</telerik:RadBusyIndicator.BusyContent>

</telerik:RadBusyIndicator>

So is there a way to use the built-in animation in the custom scenario?

Or, better yet, is there a way to display a text message without using a custom template?

BusyIndicator

answered on 23 May 2019

1 answer

90 views

Use like ActivityIndicator

Hi there, we are using radbusyindicator in our app. for page loading its working fine. But during Login command, when api is called, we want to use it like ActivityIndicator that means it will show its background ui with blur effect, instead of showing white blank background. Is it possible to do it with radbusyindicator ?

BusyIndicator

answered on 12 Mar 2019

1 answer

147 views

RadBusyIndicator

Is there a way to show busy indicator on top of all the pages when data is downloading using RadBusyIndicator. Example: When The User navigates to a different page and the data is still downloading a BusyIndicator is displayed on all the pages indicating download is in progress.

Thanks.

BusyIndicator

answered on 11 Feb 2019

1 answer

1.3K+ views

Error Exception has been thrown by the target of an invocation

Hi, I have a problem when using BusyIndicator. I mark the following error when I want to change its status to false

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:telerikInput="clr-namespace:Telerik.XamarinForms.Input;assembly=Telerik.XamarinForms.Input"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:local="clr-namespace:ONControl_Mobile.CUST.VinculoCultural"
xmlns:telerikInputDataForm="clr-namespace:Telerik.XamarinForms.Input.DataForm;assembly=Telerik.XamarinForms.Input"
xmlns:telerikPrimitives="clr-namespace:Telerik.XamarinForms.Primitives;assembly=Telerik.XamarinForms.Primitives"
x:Class="ONControl_Mobile.CUST.VinculoCultural.VCPA_AutorizacionContratoDetail"
BackgroundColor="White">
<telerikPrimitives:RadBusyIndicator x:Name="BusyIndicator"
AnimationContentHeightRequest="150"
AnimationContentWidthRequest="150"
AnimationType="Animation3"
AnimationContentColor="#4E6F99">

<telerikPrimitives:RadBusyIndicator.BusyContent>
<Label Text="Cargando..." HorizontalOptions="Center" HorizontalTextAlignment="Center"/>
</telerikPrimitives:RadBusyIndicator.BusyContent>
<telerikPrimitives:RadBusyIndicator.Content>

<ScrollView>
<AbsoluteLayout HorizontalOptions="FillAndExpand" BackgroundColor="White">
<StackLayout Padding="5,5,5,10">

<Grid VerticalOptions="Start">
<Grid.RowDefinitions>
<RowDefinition Height="18" />
<RowDefinition Height="40" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="5*" />
<ColumnDefinition Width="5*" />
</Grid.ColumnDefinitions>

<Label x:Name="LB_Folio" Text="Folio:" Grid.Row="0" Grid.Column="0" HorizontalOptions="FillAndExpand" Font="12" TextColor="Black" FontAttributes="Bold" Margin="5,0,0,0"/>
<Label x:Name="LB_Fecha" Text="Fecha:" Grid.Row="0" Grid.Column="1" HorizontalOptions="End" Font="12" TextColor="Black" FontAttributes="Bold" Margin="0,0,5,0"/>

<telerikInput:RadEntry x:Name="TB_ClienteDescripcion"
TextColor="Black"
FontSize="19"
Text="Cliente"
Grid.Row="1"
Grid.Column="0"
Grid.ColumnSpan="2"
HorizontalOptions="FillAndExpand"
VerticalTextAlignment="Center"
Opacity="70"
BorderStyle="{StaticResource EntryBorderStyle}"
IsEnabled="False"/>
</Grid>


<telerikInput:RadDataForm x:Name="RDF_Contrato"
Margin="5,5,0,0"
ValidationMode="Manual">
<telerikInput:RadDataForm.Source>
<local:VCPA_ContratoSource />
</telerikInput:RadDataForm.Source>
<telerikInput:RadDataForm.GroupHeaderStyle>
<telerikInputDataForm:DataFormGroupHeaderStyle Background="Gainsboro" Foreground="Black" Height="55" Padding="10" TextAlignment="Center" />
</telerikInput:RadDataForm.GroupHeaderStyle>
</telerikInput:RadDataForm>


<Label Text="Seleccionar Estado" FontSize="12" TextColor="#424242" FontAttributes="Bold" Font="Arial"></Label>
<Picker x:Name="P_Estado"
Grid.Row="2"
Grid.Column="0"
Grid.ColumnSpan="2"
HorizontalOptions="FillAndExpand"
FontSize="Small"
VerticalOptions="Start"
TextColor="Gainsboro"
SelectedIndexChanged="P_Estado_SelectedIndexChanged"/>

<Label Text="Seleccionar Ciudad" FontSize="12" TextColor="#424242" FontAttributes="Bold" Font="Arial"></Label>
<Picker x:Name="P_Ciudad"
Grid.Row="3"
Grid.Column="0"
Grid.ColumnSpan="2"
HorizontalOptions="FillAndExpand"
FontSize="Small"
VerticalOptions="Start"
TextColor="Gainsboro"
SelectedIndexChanged="P_Ciudad_SelectedIndexChanged"/>


<telerikInput:RadButton x:Name="B_Autorizar"
Text="Autorizar Contrato"
Clicked="B_Autorizar_Clicked"
FontSize="12"
TextColor="Black"/>


</StackLayout>
</AbsoluteLayout>
</ScrollView>
</telerikPrimitives:RadBusyIndicator.Content>
</telerikPrimitives:RadBusyIndicator>
</ContentPage>