I have a Button in a ViewCell...
<?xml version="1.0" encoding="UTF-8"?>
<ViewCell xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" x:Class="ConnectionCrew.UI.Shared.Appointments.CompletionFormMain">
<ViewCell.View>
<Grid Margin="8, 16, 8, 16">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<StackLayout BackgroundColor="#bdbdbd" Padding="1">
<Editor x:Name="txtBxShiftNotes" BackgroundColor="White" Grid.Row="0" HeightRequest="100" />
</StackLayout>
<Button x:Name="btnSubmit" VerticalOptions="End" Grid.Row="1" HorizontalOptions="FillAndExpand" Text="Confirm Attendence" BackgroundColor="Lime" TextColor="White" HeightRequest="50" />
</Grid>
</ViewCell.View>
</ViewCell>
Two undesirable things are happening.
1) The bottom of the containing ViewCell is just beneath the button's text - it's as if the baseline of the text is aligned to the bottom of the cell.
2) If I click on the button, its click event doesn't fire and the whole cell flashes. Except if I click just above the text - in which case there is no flashing and the click event is raised.
How can I fix these issues? I'd prefer no flashing, correct alignment and proper hit testing.
I don't know about your problem, but I suggest to:
Add "ColumnDefinition" property to your Grid (Rows_and_Columns)
Add Grid.Row and Grid.Column property to StackLayout control
Remove Grid.Row property from Editor control (it's inside a StackLayout, so StackLayout should have Row and Column property)
Add Grid.Column property to Button control
Post images of your actual problems
Do you have the problem on iOS, Android, UWP?
A repo on GitHub could be useful
I moved the margins to the child elements...
<?xml version="1.0" encoding="UTF-8"?>
<ViewCell xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" x:Class="ConnectionCrew.UI.Shared.Appointments.CompletionFormMain">
<ViewCell.View>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<StackLayout Margin="8, 8, 8, 0" Grid.Row="0" BackgroundColor="#bdbdbd" Padding="1">
<Editor x:Name="txtBxShiftNotes" BackgroundColor="White" HeightRequest="100" />
</StackLayout>
<Button Margin="8, 0, 8, 8" x:Name="btnSubmit" VerticalOptions="CenterAndExpand" Grid.Row="1" HorizontalOptions="FillAndExpand" Text="Confirm Attendence" BackgroundColor="Lime" TextColor="White" HeightRequest="50" />
</Grid>
</ViewCell.View>
</ViewCell>
Related
I am trying to make the top carouselview fullscreen. However, there is a slight border to the left and to the upper part of the every picture in the carouselview. If I set a background color to the grid, it gets rendered into the corners, but not with the picture. This code works on Android, the problem exists only on iOS. Any Ideas?
<Grid>
<Grid RowSpacing="0" ColumnSpacing="0">
<Grid.RowDefinitions >
<RowDefinition Height="285"/>
<RowDefinition Height="auto"/>
</Grid.RowDefinitions>
<Grid Grid.Row="0" >
<CarouselView VerticalOptions="Start" Margin="0,0,0,0" HorizontalOptions="Start" Loop="false" x:Name="carouselview" ItemTemplate="{StaticResource templateSelector}" />
</Grid>
The template selector:
<Grid RowSpacing="0" HeightRequest="280">
<Grid.GestureRecognizers>
<TapGestureRecognizer Tapped="TapGestureRecognizer_Tapped"/>
</Grid.GestureRecognizers>
<Image
Source="{Binding fullPic}"
Aspect="Fill"
x:Name="img_pic"
VerticalOptions="FillAndExpand"
HorizontalOptions="FillAndExpand" />
<Grid Margin="0,0,4,4"
HorizontalOptions="End"
VerticalOptions="End">
<BoxView
CornerRadius="20"
IsVisible="{Binding isNumberVisible}"
BackgroundColor="#99000000"/>
<Label
Text="{Binding number}"
FontSize="15"
VerticalOptions="Center"
HorizontalOptions="Center"
FontFamily="Font_11"
TextColor="White"
/>
</Grid>
</Grid>
Adding this to the main grid of the datatemplate of the carouselview fixed the issue:
Margin="-2"
Below is one of my xaml file in my project. I was trying to create a region so that I can navigate a view into the region. However, when I added the code <ContetnView BorderColor="Black" Grid.Row="2" prism:RegionManager.RegionName="ContentRegion"/> and run it, a blank page was seen instead. When I remove the code line, I was able to view my controls. What is the root cause of this?
<?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:prism="http://prismlibrary.com"
mc:Ignorable="d"
x:Class="MultiPosApp.Views.HomePageView">
<StackLayout>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Label Text="Welcome to Xamarin.Forms!"
VerticalOptions="CenterAndExpand"
HorizontalOptions="CenterAndExpand" />
<StackLayout Grid.Row="1">
<Button Text="View A" Command="{Binding ButtonClickedCommand}" CommandParameter="RegionAView"/>
<Button Text="View B" Command="{Binding ButtonClickedCommand}" CommandParameter="RegionBView"/>
</StackLayout>
<ContetnView BorderColor="Black" Grid.Row="2" prism:RegionManager.RegionName="ContentRegion"/>
</Grid>
</StackLayout>
</ContentPage>
In the App.xaml.cs file in the RegisterTypes method add line containerRegistry.RegisterRegionServices();.
protected override void RegisterTypes(IContainerRegistry containerRegistry)
{
containerRegistry.RegisterRegionServices();
// ... other registrations
}
I am trying to achieve the effect, cross-platform(ios, android and uwp), as shown in the image below:
Clicking "More" normally would open a page, as normal behaviour for a tab bar item. Not sure how to override that behaviour and reveal the sliding master page instead. To the left of the "More" tab bar item, theres another tab bar item, when clicked it refreshes the data on (or reloads) the MainPage.
SettingsPage.xaml (master page, the sliding settings page)
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:local="clr-namespace:MyProject.Classes"
xmlns:views="clr-namespace:MyProject.Views"
x:Class="MyProject.Views.SettingsMasterPage"
IconImageSource="menu.png"
Padding="0,40,0,0"
Title="Menu">
<StackLayout>
<ListView x:Name="listView" x:FieldModifier="public">
<ListView.ItemsSource>
<x:Array Type="{x:Type local:MasterPageItem}">
<local:MasterPageItem Title="Settings Link 1" />
<local:MasterPageItem Title="Settings Link 2" />
<local:MasterPageItem Title="Settings Link 3" />
</x:Array>
</ListView.ItemsSource>
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<Grid Padding="5,10">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="30"/>
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Image Source="{Binding IconSource}" />
<Label Grid.Column="1" Text="{Binding Title}" />
</Grid>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</StackLayout>
</ContentPage>
MyTabbedPage.xaml
<TabbedPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:android="clr-namespace:Xamarin.Forms.PlatformConfiguration.AndroidSpecific;assembly=Xamarin.Forms.Core"
xmlns:views="clr-namespace:MyProject.Views;assembly=MyProject"
x:Class="Xamarin.Sigma01.Views.LoggerDetectionTabbedPage"
android:TabbedPage.ToolbarPlacement="Bottom"
BarBackgroundColor="White"
SelectedTabColor="Black"
BarTextColor="Black">
<TabbedPage.Children>
<views:MainPage IconImageSource="tab_icon_mainpage.png" />
<!-- second link should be the sandwhich button that brings up the settings page -->
</TabbedPage.Children>
</TabbedPage>
MainPage.xaml (the main page, navigated to by the left TabBar link icon, to the left of the sandwhich icon with title "More")
<ContentPage.Content>
<StackLayout>
<Label Text="Welcome to the Main page!"
VerticalOptions="CenterAndExpand"
HorizontalOptions="CenterAndExpand" />
</StackLayout>
</ContentPage.Content>
An easy way I can achieve the effect is to use Shell. It's released for months and just check your VS version for the correct template.
Create a new Xamarin.Forms project using VS2019.
You can use Shell out of the box if you can see the following screen.
Find "ItemsPage.xaml" in the Views folder.
Add one line in the ContentPage at the top
<ContentPage
...
Shell.TabBarIsVisible="False">
Add a StackLayout to contain the existing CollectionView and add your bottom buttons.
<RefreshView ...>
<!-- new StackLayout -->
<StackLayout>
<CollectionView ..... />
<!-- new Buttons -->
<StackLayout
HeightRequest="52"
Orientation="Horizontal"
BackgroundColor="#2196F3"
Visual="Material">
<Button
WidthRequest="200"
BackgroundColor="Transparent"
Text="Refresh"
Command="{Binding LoadItemsCommand}" />
<Button
BackgroundColor="Transparent"
Text="More"
Clicked="Button_Clicked" />
</StackLayout>
</StackLayout>
Go to "ItemsPage.xaml.cs" to complete the button event, add a method:
private void Button_Clicked(object sender, EventArgs e)
{
Shell.Current.FlyoutIsPresented = true;
}
Set startup project and deploy, check the effect and play around.
Additionally, in the latest Xamarin.Forms, UWP Shell is an experimental feature, and so does in XF 5.0. But the flyout things will probably work fine (not too sure about this).
An alternative, following the idea from #Shaw, but without Shell is to use the good old MasterDetail Page (which supports UWP) and add two buttons at the bottom to provide the "More" and "Refresh" functionality.
If this sounds like a good option for you, keep reading:
Add a Master-Detail Page to your Solution
On Visual Studio 2019 adding a Master-Detail to your solution is pretty straight forward. You only need to right click the Xamarin.Forms Project in the Solution Explorer and go to Add -> New Item (or simply use the shortcut Ctrl+Shift+A):
in the window that appears, select Master-Detail Page, give it a cool name (MasterDetailPage1 in this example!) and click Add:
By doing this you successfully have added a Master Detail to your solution. Now just go to App and set MainPage to it as follows:
MainPage = new MasterDetailPage1();
Add the bottom buttons
Now we want two buttons at the bottom of our Detail page. This is simply done by adding a stack of two buttons that locate at the end. Our newly added MasterDetailPage1Detail.xaml will then 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"
x:Class="MasterTabRefresh.MasterDetailPage1Detail"
Title="Detail">
<StackLayout>
<Label Text="This is a detail page. To get the 'triple' line icon on each platform add a icon to each platform and update the 'Master' page with an Icon that references it."
Padding="10"/>
<StackLayout Orientation="Horizontal"
VerticalOptions="EndAndExpand"
Spacing="0">
<Button BackgroundColor="CornflowerBlue"
Text="Refresh"
TextColor="White"
CornerRadius="0"
HorizontalOptions="FillAndExpand"/>
<Button BackgroundColor="CornflowerBlue"
Text="More"
TextColor="White"
CornerRadius="0"
HorizontalOptions="FillAndExpand"
Clicked="MoreClicked"/>
</StackLayout>
</StackLayout>
</ContentPage>
which should look like:
And in the code behind (MasterDetailPage1Detail.xaml.cs ) we add the "More" functionality:
private void MoreClicked(object sender, EventArgs e)
{
((MasterDetailPage)Application.Current.MainPage).IsPresented = !((MasterDetailPage)Application.Current.MainPage).IsPresented;
}
Add a nice X (close) button to your menu/master
This could be achieved by adding a label with an "X" at the top right of the menu.
Simply modify your MasterDetailPage1Master.xaml to look like (note Label at Column 2 Row 0!)
<?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="MasterTabRefresh.MasterDetailPage1Master"
Title="Master">
<StackLayout>
<ListView x:Name="MenuItemsListView"
SeparatorVisibility="None"
HasUnevenRows="true"
ItemsSource="{Binding MenuItems}">
<ListView.Header>
<Grid BackgroundColor="#03A9F4">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="10"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="30"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="30"/>
<RowDefinition Height="80"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="10"/>
</Grid.RowDefinitions>
<Label Grid.Column="2"
Grid.Row="0"
Text="X"
FontAttributes="Bold"
HorizontalTextAlignment="Center"
VerticalTextAlignment="Center">
<Label.GestureRecognizers>
<TapGestureRecognizer Tapped="X_Tapped"/>
</Label.GestureRecognizers>
</Label>
<Label
Grid.Column="1"
Grid.Row="2"
Text="My wonderful App"
Style="{DynamicResource SubtitleStyle}"/>
</Grid>
</ListView.Header>
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<StackLayout Padding="15,10" HorizontalOptions="FillAndExpand">
<Label VerticalOptions="FillAndExpand"
VerticalTextAlignment="Center"
Text="{Binding Title}"
FontSize="24"/>
</StackLayout>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</StackLayout>
</ContentPage>
Which should look like this:
And then add the "Close" functionality to that "X" Label in the code behind (MasterDetailPage1Master.xaml):
private void X_Tapped(object sender, EventArgs e)
{
((MasterDetailPage)Application.Current.MainPage).IsPresented = false;
}
And that is it! This should get you going. Happy coding!
in my XAML I have this grid:
<Grid Grid.Row="12" Grid.Column="1" ColumnSpacing="0" >
<Grid.RowDefinitions>
<RowDefinition Height="*"></RowDefinition>
<!--Label-->
<RowDefinition Height="3*" ></RowDefinition>
<!--ProfilePic-->
<RowDefinition Height="*"></RowDefinition>
<!-- Btn change-->
</Grid.RowDefinitions>
<BoxView BackgroundColor="Purple" Grid.Row="1"></BoxView>
<ImageButton
Grid.Row="2"
x:Name="row_forpic_editProfile"
HorizontalOptions="Center"
VerticalOptions="Center"
/>
<Label
Grid.Row="0"
FontSize="16"
TextColor="#272727"
VerticalOptions="End"
Text="Proilfbild"
FontFamily="arial"
/>
<Button
Grid.Row="2"
x:Name="btn_changepic_editprofile"
Text="Ändern"
HorizontalOptions="Center"
VerticalOptions="Center"
/>
</Grid>
This is the result of that:
The result
Now, I want to add an imageview into the purple row (which is Grid.Row="1") from code because I downloaded a picture from the internet.
How can I now add my new Image (ImageButton) into this exact row? (row 1)
And also have it maintain its dimensions (only the picture must full the container).
thank you:)
to add a View to a Grid
myGrid.Children.Add(view,col,row);
I have the following XAML in my Xamarin Forms project
<StackLayout x:Name="slFullPage" Orientation="Vertical" HorizontalOptions="Fill" VerticalOptions="FillAndExpand" Margin="0,0,0,0" BackgroundColor="AliceBlue">
<localapp:PageHeader x:Name="pgHeader" VerticalOptions="Start" HorizontalOptions="Fill" />
<combobox:SfComboBox x:Name="cmbLanguage" DataSource="{Binding LangaugesByAppLanguage}" TextSize="Micro"
TextColor="#283655" SelectionChanged="cmbLanguage_SelectionChanged"
Watermark="{localapp:Translate SelectValue}" DropDownItemHeight="25" WidthRequest="250" HeightRequest="30"
DropDownTextSize="Micro" BackgroundColor="White" HorizontalOptions="Center" VerticalOptions="Start"
DisplayMemberPath="LanguageName" SelectedValuePath="ISO_639_1_Code">
</combobox:SfComboBox>
<StackLayout Orientation="Horizontal" HorizontalOptions="FillAndExpand" VerticalOptions="End" BackgroundColor="Aqua">
<buttons:SfButton x:Name="btnCancel" Text="{localapp:Translate Cancel}" HorizontalOptions="Start" VerticalOptions="End" Margin="8,0,4,0"/>
<buttons:SfButton x:Name="btnDone" Text="{localapp:Translate Done}" HorizontalOptions="End" VerticalOptions="End" Margin="4,0,8,0"/>
</StackLayout>
<localapp:AppFooter x:Name="pgFooter" VerticalOptions="End" HorizontalOptions="Fill" />
</StackLayout>
Based on my understanding of the horizontal options that can be specified on an object, I would expect the Cancel button to be at the start of my horizontal stack layout and my Done button to be at the end of the same stack layout.
Additionally, based on the vertical options that can be used, I would expect the stacklayout with the buttons in it as well as my appfoot to appear at the bottom of my slFullPage stack layout. However, neither of those things are happening.
Instead what I get can be seen below:
You can see that the entire page stacklayout is going all the way to the bottom of the screen but my buttons and footer are not at the bottom.
Additinally, you can see the horizontal stack layout (aqua) goes all the way across the screen but the buttons are not positioned based on their horizontal options.
Any ideas?? FYI - I am running the project as a UWP app.
Based on my understanding of the horizontal options that can be specified on an object, I would expect the Cancel button to be at the start of my horizontal stack layout and my Done button to be at the end of the same stack layout.
You could use a AbsoluteLayout to make the buttons positioned anywhere within a view.
<AbsoluteLayout BackgroundColor="LightBlue" HeightRequest="60" VerticalOptions="EndAndExpand">
<Button Text="Cancel" Margin="10,10" BackgroundColor="DarkBlue" TextColor="White"/>
<Button Text="Done" Margin="10,10" AbsoluteLayout.LayoutBounds="1, 0, AutoSize, AutoSize" AbsoluteLayout.LayoutFlags="PositionProportional" BackgroundColor="DarkBlue" TextColor="White"/>
</AbsoluteLayout>
And use the VerticalOptions="EndAndExpand" to make it appears at the end of its parent and expands.
Updated:
I do not know what it was before, but for now, it doesn’t actually fill up the space in the StackLayout. It’s only when the fill option is used, that it will expand to that space.
When you expect the Cancel button to be at the start and the Done button to be at the end of the same stack layout, fill option and expend need to be setted. I use simple example to display.
<StackLayout Orientation="Horizontal" HorizontalOptions="FillAndExpand" VerticalOptions="EndAndExpand" BackgroundColor="Aqua">
<Button x:Name="btnCancel" Text="Cancel" HorizontalOptions="StartAndExpand" Margin="8,0,4,0"/>
<Button x:Name="btnDone" Text="Done" HorizontalOptions="EndAndExpand" Margin="4,0,8,0"/>
</StackLayout>
And if you do not want space between last two lines in the end, you need a nested stacklayout to do that without space.
Simple code:
<StackLayout BackgroundColor="LightGray">
<StackLayout>
<Entry x:Name="pgHeader" Text="pgHeader" HorizontalOptions="FillAndExpand" />
<Entry x:Name="cmbLanguage" Text="cmbLanguage" WidthRequest="250" HeightRequest="30"
BackgroundColor="Red" HorizontalOptions="CenterAndExpand" ></Entry>
</StackLayout>
<StackLayout HorizontalOptions="FillAndExpand" VerticalOptions="EndAndExpand">
<StackLayout Orientation="Horizontal" BackgroundColor="Aqua">
<Button x:Name="btnCancel" Text="Cancel" HorizontalOptions="StartAndExpand" Margin="8,0,4,0"/>
<Button x:Name="btnDone" Text="Done" HorizontalOptions="EndAndExpand" Margin="4,0,8,0"/>
</StackLayout>
<Entry x:Name="pgFooter" Text="pgFooter"/>
</StackLayout>
</StackLayout>
You don't want to use a StackLayout (well 2 StackLayout), but a Grid:
It's more convenient for your layout, and it is way more performant.
<Grid ColumnSpacing="0" RowSpacing="0">
<Grid.RowDefinitions>
<RowDefinition Height="50" />
<RowDefinition Height="40" />
<RowDefinition Height="40" />
</Grid.RowDefinitions>
<Grid.ColumnDefinition>
<ColumnDefinition Width="80" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="80" />
</Grid.ColumnDefinition>
<localapp:PageHeader Grid.Row="0" x:Name="pgHeader" />
<combobox:SfComboBox Grid.Row="1" x:Name="cmbLanguage" DataSource="{Binding LangaugesByAppLanguage}" TextSize="Micro"
TextColor="#283655" SelectionChanged="cmbLanguage_SelectionChanged"
Watermark="{localapp:Translate SelectValue}" DropDownItemHeight="25" WidthRequest="250"
DropDownTextSize="Micro" BackgroundColor="White" HorizontalOptions="Center"
DisplayMemberPath="LanguageName" SelectedValuePath="ISO_639_1_Code">
</combobox:SfComboBox>
<buttons:SfButton Grid.Row="2" Grid.Column="0"
x:Name="btnCancel" Text="{localapp:Translate Cancel}" Margin="8,0,4,0"/>
<buttons:SfButton Grid.Row="2" Grid.Column="2"
x:Name="btnDone" Text="{localapp:Translate Done}" Margin="4,0,8,0"/>
</Grid>