Mixing
CarouselView in XamarinForms
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0
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I'm trying to use the CarouselView in the Xamarin project. But I can’t do it. Here are the installed packages:
Here is the 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:FlowersStore"
xmlns:cv="clr-namespace:Xamarin.Forms;assembly=Xamarin.Forms.CarouselView"
x:Class="FlowersStore.MainPage">
<StackLayout>
<Grid RowSpacing="0">
<Grid.RowDefinitions>
<RowDefinition Height=".3*"/>
<RowDefinition Height=".7*"/>
</Grid.RowDefinitions>
<cv:CarouselView ItemsSource="{Binding Zoos}" x:Name="CarouselZoos">
<cv:CarouselView.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Image Grid.RowSpan="2" Aspect="AspectFill" Source="{Binding ImageUrl}"/>
<StackLayout Grid.Row="1" BackgroundColor="#80000000" Padding="12">
<Label TextColor="White" Text="{Binding Name}" FontSize="16" HorizontalOptions="Center" VerticalOptions="CenterAndExpand"/>
</StackLayout>
</Grid>
</DataTemplate>
</cv:CarouselView.ItemTemplate>
</cv:CarouselView>
</Grid>
</StackLayout>
And here is the c # code:
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using Xamarin.Forms;
namespace FlowersStore
{
public class Zoo
{
public string ImageUrl { get; set; }
public string Name { get; set; }
}
public partial class MainPage : ContentPage
{
public MainPage()
{
InitializeComponent();
LoadDataCatouselView();
}
public void LoadDataCatouselView()
{
ObservableCollection<Zoo> Zoos = new ObservableCollection<Zoo>
{
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/23c1dd13-333a-459e-9e23-c3784e7cb434/2016-06-02_1049.png",
Name = "Woodland Park Zoo"
},
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/6b60d27e-c1ec-4fe6-bebe-7386d545bb62/2016-06-02_1051.png",
Name = "Cleveland Zoo"
},
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/e8179889-8189-4acb-bac5-812611199a03/2016-06-02_1053.png",
Name = "Phoenix Zoo"
}
};
CarouselZoos.ItemsSource = Zoos;
}
}
}
I use Xamarin Live Player for debugging. The log on the mobile phone displays the following message:
[LogEntry: Time=19.11.2018 14:54:54 +03:00, Level=Error, Title=Visualization Error, Message=The given key was not present in the dictionary. (KeyNotFoundException)]
How to fix it? Thanks.
Update 1:
I replaced the code based on your advice. I used your advice. I tried to run the application on:
- Androind version: 7.1
- Emulator: Genymotion Galaxy S7 7.1.0 API 25
And got this error:
What it? :(
c# xaml xamarin.forms carousel
asked Nov 19 at 12:00
Range
1054
add a comment |
up vote
0
down vote
favorite
I'm trying to use the CarouselView in the Xamarin project. But I can’t do it. Here are the installed packages:
Here is the 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:FlowersStore"
xmlns:cv="clr-namespace:Xamarin.Forms;assembly=Xamarin.Forms.CarouselView"
x:Class="FlowersStore.MainPage">
<StackLayout>
<Grid RowSpacing="0">
<Grid.RowDefinitions>
<RowDefinition Height=".3*"/>
<RowDefinition Height=".7*"/>
</Grid.RowDefinitions>
<cv:CarouselView ItemsSource="{Binding Zoos}" x:Name="CarouselZoos">
<cv:CarouselView.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Image Grid.RowSpan="2" Aspect="AspectFill" Source="{Binding ImageUrl}"/>
<StackLayout Grid.Row="1" BackgroundColor="#80000000" Padding="12">
<Label TextColor="White" Text="{Binding Name}" FontSize="16" HorizontalOptions="Center" VerticalOptions="CenterAndExpand"/>
</StackLayout>
</Grid>
</DataTemplate>
</cv:CarouselView.ItemTemplate>
</cv:CarouselView>
</Grid>
</StackLayout>
And here is the c # code:
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using Xamarin.Forms;
namespace FlowersStore
{
public class Zoo
{
public string ImageUrl { get; set; }
public string Name { get; set; }
}
public partial class MainPage : ContentPage
{
public MainPage()
{
InitializeComponent();
LoadDataCatouselView();
}
public void LoadDataCatouselView()
{
ObservableCollection<Zoo> Zoos = new ObservableCollection<Zoo>
{
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/23c1dd13-333a-459e-9e23-c3784e7cb434/2016-06-02_1049.png",
Name = "Woodland Park Zoo"
},
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/6b60d27e-c1ec-4fe6-bebe-7386d545bb62/2016-06-02_1051.png",
Name = "Cleveland Zoo"
},
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/e8179889-8189-4acb-bac5-812611199a03/2016-06-02_1053.png",
Name = "Phoenix Zoo"
}
};
CarouselZoos.ItemsSource = Zoos;
}
}
}
I use Xamarin Live Player for debugging. The log on the mobile phone displays the following message:
[LogEntry: Time=19.11.2018 14:54:54 +03:00, Level=Error, Title=Visualization Error, Message=The given key was not present in the dictionary. (KeyNotFoundException)]
How to fix it? Thanks.
Update 1:
I replaced the code based on your advice. I used your advice. I tried to run the application on:
- Androind version: 7.1
- Emulator: Genymotion Galaxy S7 7.1.0 API 25
And got this error:
What it? :(
c# xaml xamarin.forms carousel
asked Nov 19 at 12:00
Range
1054
Did you try in a simulator or a physical device?
– hashimks
Nov 19 at 12:23
1
That's problem with the path, I experimented that in one case, I move the entire project solution to the my local drive C: I think it's problem with the compilation.
– Ivan-San
2 days ago
@hashimks a physical device.
– Range
2 days ago
@Ivan-San Yes! Yes - yes - yes! This program running! Very big thanks! You can write it as an answer :)
– Range
2 days ago
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I'm trying to use the CarouselView in the Xamarin project. But I can’t do it. Here are the installed packages:
Here is the 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:FlowersStore"
xmlns:cv="clr-namespace:Xamarin.Forms;assembly=Xamarin.Forms.CarouselView"
x:Class="FlowersStore.MainPage">
<StackLayout>
<Grid RowSpacing="0">
<Grid.RowDefinitions>
<RowDefinition Height=".3*"/>
<RowDefinition Height=".7*"/>
</Grid.RowDefinitions>
<cv:CarouselView ItemsSource="{Binding Zoos}" x:Name="CarouselZoos">
<cv:CarouselView.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Image Grid.RowSpan="2" Aspect="AspectFill" Source="{Binding ImageUrl}"/>
<StackLayout Grid.Row="1" BackgroundColor="#80000000" Padding="12">
<Label TextColor="White" Text="{Binding Name}" FontSize="16" HorizontalOptions="Center" VerticalOptions="CenterAndExpand"/>
</StackLayout>
</Grid>
</DataTemplate>
</cv:CarouselView.ItemTemplate>
</cv:CarouselView>
</Grid>
</StackLayout>
And here is the c # code:
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using Xamarin.Forms;
namespace FlowersStore
{
public class Zoo
{
public string ImageUrl { get; set; }
public string Name { get; set; }
}
public partial class MainPage : ContentPage
{
public MainPage()
{
InitializeComponent();
LoadDataCatouselView();
}
public void LoadDataCatouselView()
{
ObservableCollection<Zoo> Zoos = new ObservableCollection<Zoo>
{
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/23c1dd13-333a-459e-9e23-c3784e7cb434/2016-06-02_1049.png",
Name = "Woodland Park Zoo"
},
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/6b60d27e-c1ec-4fe6-bebe-7386d545bb62/2016-06-02_1051.png",
Name = "Cleveland Zoo"
},
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/e8179889-8189-4acb-bac5-812611199a03/2016-06-02_1053.png",
Name = "Phoenix Zoo"
}
};
CarouselZoos.ItemsSource = Zoos;
}
}
}
I use Xamarin Live Player for debugging. The log on the mobile phone displays the following message:
[LogEntry: Time=19.11.2018 14:54:54 +03:00, Level=Error, Title=Visualization Error, Message=The given key was not present in the dictionary. (KeyNotFoundException)]
How to fix it? Thanks.
Update 1:
I replaced the code based on your advice. I used your advice. I tried to run the application on:
- Androind version: 7.1
- Emulator: Genymotion Galaxy S7 7.1.0 API 25
And got this error:
What it? :(
c# xaml xamarin.forms carousel
asked Nov 19 at 12:00
Range
1054
I'm trying to use the CarouselView in the Xamarin project. But I can’t do it. Here are the installed packages:
Here is the 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:FlowersStore"
xmlns:cv="clr-namespace:Xamarin.Forms;assembly=Xamarin.Forms.CarouselView"
x:Class="FlowersStore.MainPage">
<StackLayout>
<Grid RowSpacing="0">
<Grid.RowDefinitions>
<RowDefinition Height=".3*"/>
<RowDefinition Height=".7*"/>
</Grid.RowDefinitions>
<cv:CarouselView ItemsSource="{Binding Zoos}" x:Name="CarouselZoos">
<cv:CarouselView.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Image Grid.RowSpan="2" Aspect="AspectFill" Source="{Binding ImageUrl}"/>
<StackLayout Grid.Row="1" BackgroundColor="#80000000" Padding="12">
<Label TextColor="White" Text="{Binding Name}" FontSize="16" HorizontalOptions="Center" VerticalOptions="CenterAndExpand"/>
</StackLayout>
</Grid>
</DataTemplate>
</cv:CarouselView.ItemTemplate>
</cv:CarouselView>
</Grid>
</StackLayout>
And here is the c # code:
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using Xamarin.Forms;
namespace FlowersStore
{
public class Zoo
{
public string ImageUrl { get; set; }
public string Name { get; set; }
}
public partial class MainPage : ContentPage
{
public MainPage()
{
InitializeComponent();
LoadDataCatouselView();
}
public void LoadDataCatouselView()
{
ObservableCollection<Zoo> Zoos = new ObservableCollection<Zoo>
{
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/23c1dd13-333a-459e-9e23-c3784e7cb434/2016-06-02_1049.png",
Name = "Woodland Park Zoo"
},
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/6b60d27e-c1ec-4fe6-bebe-7386d545bb62/2016-06-02_1051.png",
Name = "Cleveland Zoo"
},
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/e8179889-8189-4acb-bac5-812611199a03/2016-06-02_1053.png",
Name = "Phoenix Zoo"
}
};
CarouselZoos.ItemsSource = Zoos;
}
}
}
I use Xamarin Live Player for debugging. The log on the mobile phone displays the following message:
[LogEntry: Time=19.11.2018 14:54:54 +03:00, Level=Error, Title=Visualization Error, Message=The given key was not present in the dictionary. (KeyNotFoundException)]
How to fix it? Thanks.
Update 1:
I replaced the code based on your advice. I used your advice. I tried to run the application on:
- Androind version: 7.1
- Emulator: Genymotion Galaxy S7 7.1.0 API 25
And got this error:
What it? :(
c# xaml xamarin.forms carousel
c# xaml xamarin.forms carousel
asked Nov 19 at 12:00
Range
1054
asked Nov 19 at 12:00
Range
1054
edited 2 days ago
asked Nov 19 at 12:00
Range
1054
asked Nov 19 at 12:00
Range
1054
asked Nov 19 at 12:00
Range
1054
1054
Did you try in a simulator or a physical device?
– hashimks
Nov 19 at 12:23
1
That's problem with the path, I experimented that in one case, I move the entire project solution to the my local drive C: I think it's problem with the compilation.
– Ivan-San
2 days ago
@hashimks a physical device.
– Range
2 days ago
@Ivan-San Yes! Yes - yes - yes! This program running! Very big thanks! You can write it as an answer :)
– Range
2 days ago
add a comment |
Did you try in a simulator or a physical device?
– hashimks
Nov 19 at 12:23
1
That's problem with the path, I experimented that in one case, I move the entire project solution to the my local drive C: I think it's problem with the compilation.
– Ivan-San
2 days ago
@hashimks a physical device.
– Range
2 days ago
@Ivan-San Yes! Yes - yes - yes! This program running! Very big thanks! You can write it as an answer :)
– Range
2 days ago
Did you try in a simulator or a physical device?
– hashimks
Nov 19 at 12:23
Did you try in a simulator or a physical device?
– hashimks
Nov 19 at 12:23
1
1
That's problem with the path, I experimented that in one case, I move the entire project solution to the my local drive C: I think it's problem with the compilation.
– Ivan-San
2 days ago
That's problem with the path, I experimented that in one case, I move the entire project solution to the my local drive C: I think it's problem with the compilation.
– Ivan-San
2 days ago
@hashimks a physical device.
– Range
2 days ago
@hashimks a physical device.
– Range
2 days ago
@Ivan-San Yes! Yes - yes - yes! This program running! Very big thanks! You can write it as an answer :)
– Range
2 days ago
@Ivan-San Yes! Yes - yes - yes! This program running! Very big thanks! You can write it as an answer :)
– Range
2 days ago
add a comment |
4 Answers
4
active
oldest
votes
up vote
2
down vote
accepted
The problem is with the long path.
An easy solution is to move the entire project solution to a shorter path like C:
Here's an explanation from microsoft:
Path Too Long Exception
answered 2 days ago
Ivan-San
31518
add a comment |
up vote
2
down vote
In your XAML you have the following line:
<cv:CarouselView ItemsSource="{Binding Zoos}" x:Name="CarouselZoos">
This means that the code is looking to bind a property named Zoos to the ItemsSource property of the CarouselView. You will need to create a property of type List<View> and implement the INotifyPropertyChanged structure to update the view. You'll also need to assign the content page's BindingContext to itself (BindingContext = this;).
You may also find that you cannot simply bind a URL to the Image source, and expect the image to appear.
answered Nov 19 at 14:35
Tom
618412
Problem added in the first post, please see
– Range
2 days ago
add a comment |
up vote
1
down vote
Add the BindingContext=this; after the InitializeComponent(); or else add CarouselZoos.ItemsSource = Zoos; in OnAppearing() method
answered Nov 19 at 12:29
Sujith Kumar
316
add a comment |
up vote
1
down vote
Try this
First add this class, for property binding and implement the INotifyPropertyChanged structure to update the view.
public class ViewModelBase : INotifyPropertyChanged
{
string title = string.Empty;
/// <summary>
/// Gets or sets the title.
/// </summary>
/// <value>The title.</value>
public string Title
{
get { return title; }
set { SetProperty(ref title, value); }
}
string icon = string.Empty;
/// <summary>
/// Gets or sets the icon.
/// </summary>
/// <value>The icon.</value>
public string Icon
{
get { return icon; }
set { SetProperty(ref icon, value); }
}
bool isBusy;
/// <summary>
/// Gets or sets a value indicating whether this instance is busy.
/// </summary>
/// <value><c>true</c> if this instance is busy; otherwise, <c>false</c>.</value>
public bool IsBusy
{
get { return isBusy; }
set
{
SetProperty(ref isBusy, value);
}
}
/// <summary>
/// Sets the property.
/// </summary>
/// <returns><c>true</c>, if property was set, <c>false</c> otherwise.</returns>
/// <param name="backingStore">Backing store.</param>
/// <param name="value">Value.</param>
/// <param name="propertyName">Property name.</param>
/// <param name="onChanged">On changed.</param>
/// <typeparam name="T">The 1st type parameter.</typeparam>
protected bool SetProperty<T>(
ref T backingStore, T value,
[CallerMemberName]string propertyName = "",
Action onChanged = null)
{
if (EqualityComparer<T>.Default.Equals(backingStore, value))
return false;
backingStore = value;
onChanged?.Invoke();
OnPropertyChanged(propertyName);
return true;
}
/// <summary>
/// Occurs when property changed.
/// </summary>
public event PropertyChangedEventHandler PropertyChanged;
/// <summary>
/// Raises the property changed event.
/// </summary>
/// <param name="propertyName">Property name.</param>
protected void OnPropertyChanged([CallerMemberName]string propertyName = "") => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
Now when you got the base class for bind properties you can add a view model class for bind the properties and follow the MVVM pattern. I think this is the most property way to manipulate the data.
public class Zoo
{
public string ImageUrl { get; set; }
public string Name { get; set; }
}
public class CarouselViewModel : ViewModelBase
{
private ObservableCollection<Zoo> zoos;
public ObservableCollection<Zoo> Zoos
{
get => zoos; set => SetProperty(ref zoos, value);
}
public CarouselViewModel()
{
zoos = new ObservableCollection<Zoo>
{
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/23c1dd13-333a-459e-9e23-c3784e7cb434/2016-06-02_1049.png",
Name = "Woodland Park Zoo"
},
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/6b60d27e-c1ec-4fe6-bebe-7386d545bb62/2016-06-02_1051.png",
Name = "Cleveland Zoo"
},
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/e8179889-8189-4acb-bac5-812611199a03/2016-06-02_1053.png",
Name = "Phoenix Zoo"
}
};
}
}
public partial class MainPage : ContentPage
{
public CarouselViewModel viewModel;
public MainPage()
{
InitializeComponent();
this.BindingContext = viewModel = new CarouselViewModel();
}
}
answered Nov 19 at 15:25
Ivan-San
31518
I changed the code as you specified, but the error remains the same: (
– Range
Nov 19 at 16:54
Maybe it's the Xamarin Live Player, did you try to build on your phone or in the simulator? I try for myself and it works with no errors.
– Ivan-San
Nov 19 at 17:03
Please, see first post
– Range
2 days ago
add a comment |
4 Answers
4
active
oldest
votes
4 Answers
4
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
2
down vote
accepted
The problem is with the long path.
An easy solution is to move the entire project solution to a shorter path like C:
Here's an explanation from microsoft:
Path Too Long Exception
answered 2 days ago
Ivan-San
31518
add a comment |
up vote
2
down vote
accepted
The problem is with the long path.
An easy solution is to move the entire project solution to a shorter path like C:
Here's an explanation from microsoft:
Path Too Long Exception
answered 2 days ago
Ivan-San
31518
add a comment |
up vote
2
down vote
accepted
up vote
2
down vote
accepted
The problem is with the long path.
An easy solution is to move the entire project solution to a shorter path like C:
Here's an explanation from microsoft:
Path Too Long Exception
answered 2 days ago
Ivan-San
31518
The problem is with the long path.
An easy solution is to move the entire project solution to a shorter path like C:
Here's an explanation from microsoft:
Path Too Long Exception
answered 2 days ago
Ivan-San
31518
answered 2 days ago
Ivan-San
31518
answered 2 days ago
Ivan-San
31518
answered 2 days ago
Ivan-San
31518
31518
add a comment |
add a comment |
up vote
2
down vote
In your XAML you have the following line:
<cv:CarouselView ItemsSource="{Binding Zoos}" x:Name="CarouselZoos">
This means that the code is looking to bind a property named Zoos to the ItemsSource property of the CarouselView. You will need to create a property of type List<View> and implement the INotifyPropertyChanged structure to update the view. You'll also need to assign the content page's BindingContext to itself (BindingContext = this;).
You may also find that you cannot simply bind a URL to the Image source, and expect the image to appear.
answered Nov 19 at 14:35
Tom
618412
Problem added in the first post, please see
– Range
2 days ago
add a comment |
up vote
2
down vote
In your XAML you have the following line:
<cv:CarouselView ItemsSource="{Binding Zoos}" x:Name="CarouselZoos">
This means that the code is looking to bind a property named Zoos to the ItemsSource property of the CarouselView. You will need to create a property of type List<View> and implement the INotifyPropertyChanged structure to update the view. You'll also need to assign the content page's BindingContext to itself (BindingContext = this;).
You may also find that you cannot simply bind a URL to the Image source, and expect the image to appear.
answered Nov 19 at 14:35
Tom
618412
Problem added in the first post, please see
– Range
2 days ago
add a comment |
up vote
2
down vote
up vote
2
down vote
In your XAML you have the following line:
<cv:CarouselView ItemsSource="{Binding Zoos}" x:Name="CarouselZoos">
This means that the code is looking to bind a property named Zoos to the ItemsSource property of the CarouselView. You will need to create a property of type List<View> and implement the INotifyPropertyChanged structure to update the view. You'll also need to assign the content page's BindingContext to itself (BindingContext = this;).
You may also find that you cannot simply bind a URL to the Image source, and expect the image to appear.
answered Nov 19 at 14:35
Tom
618412
In your XAML you have the following line:
<cv:CarouselView ItemsSource="{Binding Zoos}" x:Name="CarouselZoos">
This means that the code is looking to bind a property named Zoos to the ItemsSource property of the CarouselView. You will need to create a property of type List<View> and implement the INotifyPropertyChanged structure to update the view. You'll also need to assign the content page's BindingContext to itself (BindingContext = this;).
You may also find that you cannot simply bind a URL to the Image source, and expect the image to appear.
answered Nov 19 at 14:35
Tom
618412
answered Nov 19 at 14:35
Tom
618412
answered Nov 19 at 14:35
Tom
618412
answered Nov 19 at 14:35
Tom
618412
618412
Problem added in the first post, please see
– Range
2 days ago
add a comment |
Problem added in the first post, please see
– Range
2 days ago
Problem added in the first post, please see
– Range
2 days ago
Problem added in the first post, please see
– Range
2 days ago
add a comment |
up vote
1
down vote
Add the BindingContext=this; after the InitializeComponent(); or else add CarouselZoos.ItemsSource = Zoos; in OnAppearing() method
answered Nov 19 at 12:29
Sujith Kumar
316
add a comment |
up vote
1
down vote
Add the BindingContext=this; after the InitializeComponent(); or else add CarouselZoos.ItemsSource = Zoos; in OnAppearing() method
answered Nov 19 at 12:29
Sujith Kumar
316
add a comment |
up vote
1
down vote
up vote
1
down vote
Add the BindingContext=this; after the InitializeComponent(); or else add CarouselZoos.ItemsSource = Zoos; in OnAppearing() method
answered Nov 19 at 12:29
Sujith Kumar
316
Add the BindingContext=this; after the InitializeComponent(); or else add CarouselZoos.ItemsSource = Zoos; in OnAppearing() method
answered Nov 19 at 12:29
Sujith Kumar
316
answered Nov 19 at 12:29
Sujith Kumar
316
answered Nov 19 at 12:29
Sujith Kumar
316
answered Nov 19 at 12:29
Sujith Kumar
316
316
add a comment |
add a comment |
up vote
1
down vote
Try this
First add this class, for property binding and implement the INotifyPropertyChanged structure to update the view.
public class ViewModelBase : INotifyPropertyChanged
{
string title = string.Empty;
/// <summary>
/// Gets or sets the title.
/// </summary>
/// <value>The title.</value>
public string Title
{
get { return title; }
set { SetProperty(ref title, value); }
}
string icon = string.Empty;
/// <summary>
/// Gets or sets the icon.
/// </summary>
/// <value>The icon.</value>
public string Icon
{
get { return icon; }
set { SetProperty(ref icon, value); }
}
bool isBusy;
/// <summary>
/// Gets or sets a value indicating whether this instance is busy.
/// </summary>
/// <value><c>true</c> if this instance is busy; otherwise, <c>false</c>.</value>
public bool IsBusy
{
get { return isBusy; }
set
{
SetProperty(ref isBusy, value);
}
}
/// <summary>
/// Sets the property.
/// </summary>
/// <returns><c>true</c>, if property was set, <c>false</c> otherwise.</returns>
/// <param name="backingStore">Backing store.</param>
/// <param name="value">Value.</param>
/// <param name="propertyName">Property name.</param>
/// <param name="onChanged">On changed.</param>
/// <typeparam name="T">The 1st type parameter.</typeparam>
protected bool SetProperty<T>(
ref T backingStore, T value,
[CallerMemberName]string propertyName = "",
Action onChanged = null)
{
if (EqualityComparer<T>.Default.Equals(backingStore, value))
return false;
backingStore = value;
onChanged?.Invoke();
OnPropertyChanged(propertyName);
return true;
}
/// <summary>
/// Occurs when property changed.
/// </summary>
public event PropertyChangedEventHandler PropertyChanged;
/// <summary>
/// Raises the property changed event.
/// </summary>
/// <param name="propertyName">Property name.</param>
protected void OnPropertyChanged([CallerMemberName]string propertyName = "") => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
Now when you got the base class for bind properties you can add a view model class for bind the properties and follow the MVVM pattern. I think this is the most property way to manipulate the data.
public class Zoo
{
public string ImageUrl { get; set; }
public string Name { get; set; }
}
public class CarouselViewModel : ViewModelBase
{
private ObservableCollection<Zoo> zoos;
public ObservableCollection<Zoo> Zoos
{
get => zoos; set => SetProperty(ref zoos, value);
}
public CarouselViewModel()
{
zoos = new ObservableCollection<Zoo>
{
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/23c1dd13-333a-459e-9e23-c3784e7cb434/2016-06-02_1049.png",
Name = "Woodland Park Zoo"
},
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/6b60d27e-c1ec-4fe6-bebe-7386d545bb62/2016-06-02_1051.png",
Name = "Cleveland Zoo"
},
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/e8179889-8189-4acb-bac5-812611199a03/2016-06-02_1053.png",
Name = "Phoenix Zoo"
}
};
}
}
public partial class MainPage : ContentPage
{
public CarouselViewModel viewModel;
public MainPage()
{
InitializeComponent();
this.BindingContext = viewModel = new CarouselViewModel();
}
}
answered Nov 19 at 15:25
Ivan-San
31518
I changed the code as you specified, but the error remains the same: (
– Range
Nov 19 at 16:54
Maybe it's the Xamarin Live Player, did you try to build on your phone or in the simulator? I try for myself and it works with no errors.
– Ivan-San
Nov 19 at 17:03
Please, see first post
– Range
2 days ago
add a comment |
up vote
1
down vote
Try this
First add this class, for property binding and implement the INotifyPropertyChanged structure to update the view.
public class ViewModelBase : INotifyPropertyChanged
{
string title = string.Empty;
/// <summary>
/// Gets or sets the title.
/// </summary>
/// <value>The title.</value>
public string Title
{
get { return title; }
set { SetProperty(ref title, value); }
}
string icon = string.Empty;
/// <summary>
/// Gets or sets the icon.
/// </summary>
/// <value>The icon.</value>
public string Icon
{
get { return icon; }
set { SetProperty(ref icon, value); }
}
bool isBusy;
/// <summary>
/// Gets or sets a value indicating whether this instance is busy.
/// </summary>
/// <value><c>true</c> if this instance is busy; otherwise, <c>false</c>.</value>
public bool IsBusy
{
get { return isBusy; }
set
{
SetProperty(ref isBusy, value);
}
}
/// <summary>
/// Sets the property.
/// </summary>
/// <returns><c>true</c>, if property was set, <c>false</c> otherwise.</returns>
/// <param name="backingStore">Backing store.</param>
/// <param name="value">Value.</param>
/// <param name="propertyName">Property name.</param>
/// <param name="onChanged">On changed.</param>
/// <typeparam name="T">The 1st type parameter.</typeparam>
protected bool SetProperty<T>(
ref T backingStore, T value,
[CallerMemberName]string propertyName = "",
Action onChanged = null)
{
if (EqualityComparer<T>.Default.Equals(backingStore, value))
return false;
backingStore = value;
onChanged?.Invoke();
OnPropertyChanged(propertyName);
return true;
}
/// <summary>
/// Occurs when property changed.
/// </summary>
public event PropertyChangedEventHandler PropertyChanged;
/// <summary>
/// Raises the property changed event.
/// </summary>
/// <param name="propertyName">Property name.</param>
protected void OnPropertyChanged([CallerMemberName]string propertyName = "") => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
Now when you got the base class for bind properties you can add a view model class for bind the properties and follow the MVVM pattern. I think this is the most property way to manipulate the data.
public class Zoo
{
public string ImageUrl { get; set; }
public string Name { get; set; }
}
public class CarouselViewModel : ViewModelBase
{
private ObservableCollection<Zoo> zoos;
public ObservableCollection<Zoo> Zoos
{
get => zoos; set => SetProperty(ref zoos, value);
}
public CarouselViewModel()
{
zoos = new ObservableCollection<Zoo>
{
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/23c1dd13-333a-459e-9e23-c3784e7cb434/2016-06-02_1049.png",
Name = "Woodland Park Zoo"
},
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/6b60d27e-c1ec-4fe6-bebe-7386d545bb62/2016-06-02_1051.png",
Name = "Cleveland Zoo"
},
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/e8179889-8189-4acb-bac5-812611199a03/2016-06-02_1053.png",
Name = "Phoenix Zoo"
}
};
}
}
public partial class MainPage : ContentPage
{
public CarouselViewModel viewModel;
public MainPage()
{
InitializeComponent();
this.BindingContext = viewModel = new CarouselViewModel();
}
}
answered Nov 19 at 15:25
Ivan-San
31518
I changed the code as you specified, but the error remains the same: (
– Range
Nov 19 at 16:54
Maybe it's the Xamarin Live Player, did you try to build on your phone or in the simulator? I try for myself and it works with no errors.
– Ivan-San
Nov 19 at 17:03
Please, see first post
– Range
2 days ago
add a comment |
up vote
1
down vote
up vote
1
down vote
Try this
First add this class, for property binding and implement the INotifyPropertyChanged structure to update the view.
public class ViewModelBase : INotifyPropertyChanged
{
string title = string.Empty;
/// <summary>
/// Gets or sets the title.
/// </summary>
/// <value>The title.</value>
public string Title
{
get { return title; }
set { SetProperty(ref title, value); }
}
string icon = string.Empty;
/// <summary>
/// Gets or sets the icon.
/// </summary>
/// <value>The icon.</value>
public string Icon
{
get { return icon; }
set { SetProperty(ref icon, value); }
}
bool isBusy;
/// <summary>
/// Gets or sets a value indicating whether this instance is busy.
/// </summary>
/// <value><c>true</c> if this instance is busy; otherwise, <c>false</c>.</value>
public bool IsBusy
{
get { return isBusy; }
set
{
SetProperty(ref isBusy, value);
}
}
/// <summary>
/// Sets the property.
/// </summary>
/// <returns><c>true</c>, if property was set, <c>false</c> otherwise.</returns>
/// <param name="backingStore">Backing store.</param>
/// <param name="value">Value.</param>
/// <param name="propertyName">Property name.</param>
/// <param name="onChanged">On changed.</param>
/// <typeparam name="T">The 1st type parameter.</typeparam>
protected bool SetProperty<T>(
ref T backingStore, T value,
[CallerMemberName]string propertyName = "",
Action onChanged = null)
{
if (EqualityComparer<T>.Default.Equals(backingStore, value))
return false;
backingStore = value;
onChanged?.Invoke();
OnPropertyChanged(propertyName);
return true;
}
/// <summary>
/// Occurs when property changed.
/// </summary>
public event PropertyChangedEventHandler PropertyChanged;
/// <summary>
/// Raises the property changed event.
/// </summary>
/// <param name="propertyName">Property name.</param>
protected void OnPropertyChanged([CallerMemberName]string propertyName = "") => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
Now when you got the base class for bind properties you can add a view model class for bind the properties and follow the MVVM pattern. I think this is the most property way to manipulate the data.
public class Zoo
{
public string ImageUrl { get; set; }
public string Name { get; set; }
}
public class CarouselViewModel : ViewModelBase
{
private ObservableCollection<Zoo> zoos;
public ObservableCollection<Zoo> Zoos
{
get => zoos; set => SetProperty(ref zoos, value);
}
public CarouselViewModel()
{
zoos = new ObservableCollection<Zoo>
{
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/23c1dd13-333a-459e-9e23-c3784e7cb434/2016-06-02_1049.png",
Name = "Woodland Park Zoo"
},
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/6b60d27e-c1ec-4fe6-bebe-7386d545bb62/2016-06-02_1051.png",
Name = "Cleveland Zoo"
},
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/e8179889-8189-4acb-bac5-812611199a03/2016-06-02_1053.png",
Name = "Phoenix Zoo"
}
};
}
}
public partial class MainPage : ContentPage
{
public CarouselViewModel viewModel;
public MainPage()
{
InitializeComponent();
this.BindingContext = viewModel = new CarouselViewModel();
}
}
answered Nov 19 at 15:25
Ivan-San
31518
Try this
First add this class, for property binding and implement the INotifyPropertyChanged structure to update the view.
public class ViewModelBase : INotifyPropertyChanged
{
string title = string.Empty;
/// <summary>
/// Gets or sets the title.
/// </summary>
/// <value>The title.</value>
public string Title
{
get { return title; }
set { SetProperty(ref title, value); }
}
string icon = string.Empty;
/// <summary>
/// Gets or sets the icon.
/// </summary>
/// <value>The icon.</value>
public string Icon
{
get { return icon; }
set { SetProperty(ref icon, value); }
}
bool isBusy;
/// <summary>
/// Gets or sets a value indicating whether this instance is busy.
/// </summary>
/// <value><c>true</c> if this instance is busy; otherwise, <c>false</c>.</value>
public bool IsBusy
{
get { return isBusy; }
set
{
SetProperty(ref isBusy, value);
}
}
/// <summary>
/// Sets the property.
/// </summary>
/// <returns><c>true</c>, if property was set, <c>false</c> otherwise.</returns>
/// <param name="backingStore">Backing store.</param>
/// <param name="value">Value.</param>
/// <param name="propertyName">Property name.</param>
/// <param name="onChanged">On changed.</param>
/// <typeparam name="T">The 1st type parameter.</typeparam>
protected bool SetProperty<T>(
ref T backingStore, T value,
[CallerMemberName]string propertyName = "",
Action onChanged = null)
{
if (EqualityComparer<T>.Default.Equals(backingStore, value))
return false;
backingStore = value;
onChanged?.Invoke();
OnPropertyChanged(propertyName);
return true;
}
/// <summary>
/// Occurs when property changed.
/// </summary>
public event PropertyChangedEventHandler PropertyChanged;
/// <summary>
/// Raises the property changed event.
/// </summary>
/// <param name="propertyName">Property name.</param>
protected void OnPropertyChanged([CallerMemberName]string propertyName = "") => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
Now when you got the base class for bind properties you can add a view model class for bind the properties and follow the MVVM pattern. I think this is the most property way to manipulate the data.
public class Zoo
{
public string ImageUrl { get; set; }
public string Name { get; set; }
}
public class CarouselViewModel : ViewModelBase
{
private ObservableCollection<Zoo> zoos;
public ObservableCollection<Zoo> Zoos
{
get => zoos; set => SetProperty(ref zoos, value);
}
public CarouselViewModel()
{
zoos = new ObservableCollection<Zoo>
{
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/23c1dd13-333a-459e-9e23-c3784e7cb434/2016-06-02_1049.png",
Name = "Woodland Park Zoo"
},
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/6b60d27e-c1ec-4fe6-bebe-7386d545bb62/2016-06-02_1051.png",
Name = "Cleveland Zoo"
},
new Zoo
{
ImageUrl = "http://content.screencast.com/users/JamesMontemagno/folders/Jing/media/e8179889-8189-4acb-bac5-812611199a03/2016-06-02_1053.png",
Name = "Phoenix Zoo"
}
};
}
}
public partial class MainPage : ContentPage
{
public CarouselViewModel viewModel;
public MainPage()
{
InitializeComponent();
this.BindingContext = viewModel = new CarouselViewModel();
}
}
answered Nov 19 at 15:25
Ivan-San
31518
answered Nov 19 at 15:25
Ivan-San
31518
answered Nov 19 at 15:25
Ivan-San
31518
answered Nov 19 at 15:25
Ivan-San
31518
31518
I changed the code as you specified, but the error remains the same: (
– Range
Nov 19 at 16:54
Maybe it's the Xamarin Live Player, did you try to build on your phone or in the simulator? I try for myself and it works with no errors.
– Ivan-San
Nov 19 at 17:03
Please, see first post
– Range
2 days ago
add a comment |
I changed the code as you specified, but the error remains the same: (
– Range
Nov 19 at 16:54
Maybe it's the Xamarin Live Player, did you try to build on your phone or in the simulator? I try for myself and it works with no errors.
– Ivan-San
Nov 19 at 17:03
Please, see first post
– Range
2 days ago
I changed the code as you specified, but the error remains the same: (
– Range
Nov 19 at 16:54
I changed the code as you specified, but the error remains the same: (
– Range
Nov 19 at 16:54
Maybe it's the Xamarin Live Player, did you try to build on your phone or in the simulator? I try for myself and it works with no errors.
– Ivan-San
Nov 19 at 17:03
Maybe it's the Xamarin Live Player, did you try to build on your phone or in the simulator? I try for myself and it works with no errors.
– Ivan-San
Nov 19 at 17:03
Please, see first post
– Range
2 days ago
Please, see first post
– Range
2 days ago
add a comment |
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Did you try in a simulator or a physical device?
– hashimks
Nov 19 at 12:23
1
That's problem with the path, I experimented that in one case, I move the entire project solution to the my local drive C: I think it's problem with the compilation.
– Ivan-San
2 days ago
@hashimks a physical device.
– Range
2 days ago
@Ivan-San Yes! Yes - yes - yes! This program running! Very big thanks! You can write it as an answer :)
– Range
2 days ago