how to set name for checkbox in ListView - xamarin

Question

i want set name for check box and use in code for post method for api
<ListView ItemsSource="{Binding}">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<StackLayout BackgroundColor="#eee" Orientation="Vertical">
<StackLayout Orientation="Horizontal">
<controls:CheckBox DefaultText="{Binding Name}" />
</StackLayout>
</StackLayout>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>

Answer 1

Since you had used MVVM . I suggest that you should handle all logic in your ViewModel .You can get the value and index of CheckBox in ViewModel.
I used the CheckBox plugin from https://github.com/enisn/Xamarin.Forms.InputKit .
in your xaml
<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:App12"
xmlns:input="clr-namespace:Plugin.InputKit.Shared.Controls;assembly=Plugin.InputKit"
mc:Ignorable="d"
x:Name="contentPage" // set the name of content page
x:Class="xxx.MainPage">
<ListView x:Name="listview" ItemsSource="{Binding MyItems}">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<StackLayout BackgroundColor="#eee" Orientation="Vertical">
<StackLayout Orientation="Horizontal">
<input:CheckBox Text="{Binding Name}" Type="Check" IsChecked="{Binding IsCheck,Mode=TwoWay}" CheckChangedCommand="{Binding Source={x:Reference contentPage}, Path=BindingContext.CheckCommand}" CommandParameter="{Binding }"/>
</StackLayout>
</StackLayout>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
in your model
public class Model : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
protected virtual void NotifyPropertyChanged([CallerMemberName] string propertyName = "")
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
public string Name { get; set; }
private bool isCheck;
public bool IsCheck
{
get
{
return isCheck;
}
set
{
if (isCheck != value)
{
isCheck = value;
NotifyPropertyChanged();
}
}
}
}
in Viewmodel or Code behind
public ObservableCollection<Model> MyItems { get; set; }
public ICommand CheckCommand { get; private set; }
public YourViewModel()
{
MyItems = new ObservableCollection<Model>() {
new Model(){Name="xxx",IsCheck=true },
//...
};
CheckCommand = new Command((arg)=> {
var model = arg as Model;
for(int i=0;i<MyItems.Count;i++)
{
if (model == MyItems[i])
{
// i is the index that you checked
bool ischeck = MyItems[i].IsCheck;
// do some thing you want
}
}
});
}

Answer 2

I would suggest adding a Binding for the CheckBox State:
<controls:CheckBox x:Name="chechBox" DefaultText="{Binding Name}" IsChecked="{Binding IsChecked}" />
And then, in the ListView ItemTapped event:
void OnSelection (object sender, SelectedItemChangedEventArgs e)
{
if (e.SelectedItem == null) {
return; //ItemSelected is called on deselection, which results in SelectedItem being set to null
}
var item = (YourModel)e.SelectedItem;
if(item != null)
{
var checkBoxState = item.IsChecked;
}
}