I want to each content page contain the following element
<xfg:ContentPageGloss.BackgroundGradient>
<xfg:Gradient Rotation="170">
<xfg:GradientStep StepColor="#9DCC5F" StepPercentage="0" />
<xfg:GradientStep StepColor="#00B0CD" StepPercentage="1" />
</xfg:Gradient>
</xfg:ContentPageGloss.BackgroundGradient>
How can I do?
Why not create an overload of the ContentPage?
Create a file, for instance, GlossContentPage.
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:xfg="clr-namespace:XFGloss;assembly=XFGloss"
x:Class="YourApp.Pages.GlossContentPage">
<xfg:ContentPageGloss.BackgroundGradient>
<xfg:Gradient Rotation="170">
<xfg:GradientStep StepColor="#9DCC5F" StepPercentage="0" />
<xfg:GradientStep StepColor="#00B0CD" StepPercentage="1" />
</xfg:Gradient>
</xfg:ContentPageGloss.BackgroundGradient>
</ContentPage>
Now just start using your new GlossContentPage, instead of a regular ContentPage, like:
<pages:GlossContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:pages="clr-namespace:YourApp.Pages;assembly=YourApp"
x:Class="YourApp.Pages.MyNewShinyPage">
<Label Text="Welcome to Xamarin.Forms" HorizontalOptions="Center" VerticalOptions="Center" />
</pages:GlossContentPage>
Related
Xamarin forms newbie here, trying to validate some user data. I've been following a guide online about setting up and verifying user information. Even after scrutinizing both my project and the sample code provided, I cannot seem to understand what assembly reference Im missing.
Here is my code
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:d="http://xamarin.com/schemas/2014/forms/design"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local ="clr-namespace:PluralBuddy"
mc:Ignorable="d"
x:Class="PluralBuddy.Views.RegisterPage" NavigationPage.HasNavigationBar="False">
<ContentPage.Content>
<StackLayout>
<Label Text="Register your system" TextColor="Black" FontSize="Header" />
<Entry Placeholder="System name" x:Name="EntryUserName" PlaceholderColor="SlateBlue" />
<Entry Placeholder="Date of Birth" x:Name="DOB" PlaceholderColor="SlateBlue" />
<Entry Placeholder="# of members" x:Name="NumUsers" PlaceholderColor="SlateBlue" />
<Entry Placeholder ="Pronouns" x:Name="Pronouns" PlaceholderColor="SlateBlue" />
<Entry Placeholder="Email" x:Name="EntryEmail" ReturnType="Next" PlaceholderColor="SlateBlue">
<Entry.Behaviors>
<local:EmailValidationBehavior />
</Entry.Behaviors>
</Entry>
<Entry Placeholder="Password" x:Name="EntryUserPassword" PlaceholderColor="SlateBlue" />
<Button Text="Register" Clicked="Registration_Action" />
</StackLayout>
</ContentPage.Content>
</ContentPage>
Guide(s) im following:
https://dzone.com/articles/register-and-login-using-sqlite-in-xamarinforms
https://www.c-sharpcorner.com/article/input-validation-in-xamarin-forms-behaviors/
In my situation I needed to better define / use namespace. I then cleaned and rebuilt my solutions and retyped the code in question.
Credit to https://stackoverflow.com/users/1338/jason
How can I change the color of an imagebutton on mouse over?
<ContentView xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
x:Class="DMInfoOrganizer.CheckBox">
<ContentView.Content>
<ImageButton x:Name="BtnCheck" Clicked="BtnCheck_Clicked"></ImageButton>
</ContentView.Content>
</ContentView>
I solved with the link suggested by LucasZhang-MSFT
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.ThemeDictionaries>
<ResourceDictionary x:Key="Light">
<SolidColorBrush x:Key="ButtonBackgroundPointerOver" Color="Transparent" />
</ResourceDictionary>
</ResourceDictionary.ThemeDictionaries>
</ResourceDictionary>
</Application.Resources>
Thanks a lot
I have a template defined in App.Xaml
<ResourceDictionary>
<ControlTemplate x:Key="HomePageTemplate">
<Label Text="{Binding MyLabelText}"/>
</ControlTemplate>
</ResourceDictionary>
And I use it in my Home page
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:cv="clr-namespace:Xamarin.Forms;assembly=Xamarin.Forms.CarouselView"
xmlns:local="clr-namespace:App.Converters"
x:Class="App.Views.HomePage"
ControlTemplate="{StaticResource HomePageTemplate}">
</ContentPage>
I set the BindingContext of my Homepage in code behind.
Now shouldn't the ControlTemplate inherit the HomePage's BindingContext ? Because I thought that was the case but my Label doesn't keep the text from MyLabelText. What's the work around to work with Bindings in these templates ?
EDIT:
Using this option
<ResourceDictionary>
<ControlTemplate x:Key="HomePageTemplate">
<Label Text="{TemplateBinding Parent.BindingContext.MyLabelText}"/>
</ControlTemplate>
</ResourceDictionary>
Also does not work for me, because I use the ControlTemplatein the header of the HomePage and not inside it's body.
This works BUT IT'S NOT what I'm looking for:
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:cv="clr-namespace:Xamarin.Forms;assembly=Xamarin.Forms.CarouselView"
xmlns:local="clr-namespace:App.Converters"
x:Class="App.Views.HomePage"
>
<ContentView ControlTemplate="{StaticResource HomePageTemplate}" />
</ContentPage>
With ControlTemplate controls the binding is slightly different. Have a look at these docs: https://learn.microsoft.com/en-us/xamarin/xamarin-forms/app-fundamentals/templates/control-templates/template-binding
Assuming that the MyLabelText property is part of the BindingContext of the parent control your code could look like this:
<ResourceDictionary>
<ControlTemplate x:Key="HomePageTemplate">
<Label Text="{TemplateBinding Parent.BindingContext.MyLabelText }"/>
</ControlTemplate>
</ResourceDictionary>
App.xaml should have a BindingContext. Let's call it AppViewmodel, with a namespace vm (or any other key) defined at the top of App.xaml. This AppViewmodel can be bound to from within the ControlTemplate. In this example a button (placed in a stacklayout) is bound to a command named AppCommand, which resides in AppViewmodel. When this ControlTemplate is applied in a ContentPage, it binds to the ViewModel of App.xaml, not to the VM of that particular ContentPage. Perhaps the latter is also possible, for example by choosing the right settings for RelativeSource and AncestorType, but I haven't figured that out.
see also
<ControlTemplate x:Key="HomePageTemplate">
<StackLayout BindingContext="{Binding Source={RelativeSource TemplatedParent}}">
<Button
Command="{Binding Source={RelativeSource AncestorType={x:Type vm:AppViewModel}}, Path=AppCommand}"
/>
</StackLayout>
</ControlTemplate>
If anyone its interested, the way this works its just adding Path after TemplateBinding, specifying BindingContext on it and then the public var name:
<ResourceDictionary>
<ControlTemplate x:Key="HomePageTemplate">
<Label Text="{ TemplateBinding Path=BindingContext.MyLabelText }"/>
</ControlTemplate>
</ResourceDictionary>
I'm beginner in Xamarin Form. This's my xaml code:
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:local="clr-namespace:BluePin"
x:Class="BluePin.MainPage"
x:Name="MainContentPage">
<RelativeLayout>
<Image Source="BG.png"
Aspect="AspectFill"></Image>
</RelativeLayout>
</ContentPage>
enter image description here
I tested all xamarin layout and controls. Please see picture, there is red distance between layout and control (Image). how can i remove this distances and set image as full screen?
set image as full screen
there are two methods to implement this:
1.set the image as the ContentPage's background
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:local="clr-namespace:BluePin"
x:Class="BluePin.MainPage"
x:Name="MainContentPage"
BackgroundImage="BG.png"
>
</ContentPage>
2.use StackLayout:
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:local="clr-namespace:BluePin"
x:Class="BluePin.MainPage"
x:Name="MainContentPage">
<StackLayout>
<Image Source="BG.png"
HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand"
Aspect="Fill" />
</StackLayout>
</ContentPage>
Try this:
<ContentPage.Content>
<RelativeLayout>
<Image Aspect="AspectFill" Source="BG.png"
RelativeLayout.HeightConstraint="{ConstraintExpression Type=RelativeToParent,
Property=Height,
Factor=1}"
RelativeLayout.WidthConstraint="{ConstraintExpression Type=RelativeToParent,
Property=Width,
Factor=1}"/>
</RelativeLayout>
</ContentPage.Content>
If you want to just show the image on the whole screen there is no need for you to define a parent layout secondly its a BAD performance practice to do so :
What your ContentPage XAML should look like:
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
BackgroundColor="Black" x:Name="MainContentPage"
x:Class="BluePin.MainPage">
<ContentPage.Content>
<Image Source="{Binding SelectedImage}" Aspect="AspectFill"
HorizontalOptions="FillAndExpand"
VerticalOptions="FillAndExpand"
BackgroundColor="Transparent" />
</ContentPage.Content>
</ContentPage>
Is it possible to add a switch on the toolbar?
<ContentPage.ToolbarItems>
<ToolbarItem>
<Switch x:Name="Switch1" IsToggled="True" Margin="5,0,0,0"/>
</ToolbarItem>
</ContentPage.ToolbarItems>
Does anybody have any ideas?
Thanks!
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:local="clr-namespace:TitleViewSample"
x:Class="TitleViewSample.MainPage">
<NavigationPage.TitleView>
<Switch x:Name="Switch1" IsToggled="True" Margin="5,0,0,0"/>
</NavigationPage.TitleView>
<ContentPage.Content>
<StackLayout>
<!-- Place new controls here -->
<Label Text="Welcome to Xamarin.Forms!"
HorizontalOptions="Center"
VerticalOptions="CenterAndExpand" />
</StackLayout>
</ContentPage.Content>
</ContentPage>
I don't think it is possible. You can, however, take the same approach I did when I needed to customise my title bar.
First, you hide the navigation bar, then you can specify your bar at the top, and use the controls you would like.