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Commit 965333c

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davidbritchdavidbritch
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Added two multibinding code examples.
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‎DataBindingDemos/DataBindingDemos/DataBindingDemos/Views/MainPage.xaml‎

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Command="{Binding NavigateCommand}"
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CommandParameter="{x:Type local:MultiBindingStringFormatPage}" />
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<TextCell Text="String Formatting (Code)"
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Detail="Combine strings from a MultiBinding"
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Command="{Binding NavigateCommand}"
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CommandParameter="{x:Type local:MultiBindingStringFormatCodePage}" />
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<TextCell Text="Multi Value Converters"
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Detail="Use a multi value converter to set the CheckBox.IsChecked property"
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Command="{Binding NavigateCommand}"
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CommandParameter="{x:Type local:MultiBindingConverterPage}" />
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<TextCell Text="Multi Value Converters (Code)"
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Detail="Use a multi value converter to set the CheckBox.IsChecked property"
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Command="{Binding NavigateCommand}"
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CommandParameter="{x:Type local:MultiBindingConverterCodePage}" />
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<TextCell Text="Nest Multi Bindings"
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Detail="Nest multi bindings to set the CheckBox.IsChecked property"
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Command="{Binding NavigateCommand}"

‎DataBindingDemos/DataBindingDemos/DataBindingDemos/Views/MultiBindingConverterCodePage.cs‎

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using System.Collections.ObjectModel;
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using Xamarin.Forms;
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namespace DataBindingDemos
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{
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public class MultiBindingConverterCodePage : ContentPage
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{
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public MultiBindingConverterCodePage()
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{
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BindingContext = new GroupViewModel();
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Grid grid = new Grid { Margin = new Thickness(20) };
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grid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Auto) });
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grid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Auto) });
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grid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Auto) });
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grid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Auto) });
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grid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Auto) });
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grid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Auto) });
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grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(0.75, GridUnitType.Star) });
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grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(0.25, GridUnitType.Star) });
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grid.Children.Add(new Label { Text = "Employee", FontAttributes = FontAttributes.Bold });
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grid.Children.Add(new Label { Text = "Can drive?", FontAttributes = FontAttributes.Bold }, 1, 0);
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Label employee1 = new Label { VerticalTextAlignment = TextAlignment.Center };
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employee1.SetBinding(Label.TextProperty, "Employee1.FullName");
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CheckBox checkBox1 = new CheckBox { HorizontalOptions = LayoutOptions.End };
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checkBox1.SetBinding(CheckBox.IsCheckedProperty, new MultiBinding
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{
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Bindings = new Collection<BindingBase>
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{
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new Binding("Employee1.IsOver16"),
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new Binding("Employee1.HasPassedTest"),
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new Binding("Employee1.IsSuspended", converter: new InverterConverter())
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},
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Converter = new AllTrueMultiConverter()
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});
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Label employee2 = new Label { VerticalTextAlignment = TextAlignment.Center };
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employee2.SetBinding(Label.TextProperty, "Employee2.FullName");
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CheckBox checkBox2 = new CheckBox { HorizontalOptions = LayoutOptions.End };
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checkBox2.SetBinding(CheckBox.IsCheckedProperty, new MultiBinding
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{
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Bindings = new Collection<BindingBase>
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{
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new Binding("Employee2.IsOver16"),
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new Binding("Employee2.HasPassedTest"),
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new Binding("Employee2.IsSuspended", converter: new InverterConverter())
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},
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Converter = new AllTrueMultiConverter()
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});
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Label employee3 = new Label { VerticalTextAlignment = TextAlignment.Center };
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employee3.SetBinding(Label.TextProperty, "Employee3.FullName");
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CheckBox checkBox3 = new CheckBox { HorizontalOptions = LayoutOptions.End };
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checkBox3.SetBinding(CheckBox.IsCheckedProperty, new MultiBinding
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{
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Bindings = new Collection<BindingBase>
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{
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new Binding("Employee3.IsOver16"),
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new Binding("Employee3.HasPassedTest"),
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new Binding("Employee3.IsSuspended", converter: new InverterConverter())
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},
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Converter = new AllTrueMultiConverter()
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});
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Label employee4 = new Label { VerticalTextAlignment = TextAlignment.Center };
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employee4.SetBinding(Label.TextProperty, "Employee4.FullName");
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CheckBox checkBox4 = new CheckBox { HorizontalOptions = LayoutOptions.End };
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checkBox4.SetBinding(CheckBox.IsCheckedProperty, new MultiBinding
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{
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Bindings = new Collection<BindingBase>
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{
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new Binding("Employee4.IsOver16"),
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new Binding("Employee4.HasPassedTest"),
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new Binding("Employee4.IsSuspended", converter: new InverterConverter())
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},
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Converter = new AllTrueMultiConverter()
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});
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Label employee5 = new Label { VerticalTextAlignment = TextAlignment.Center };
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employee5.SetBinding(Label.TextProperty, "Employee5.FullName");
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CheckBox checkBox5 = new CheckBox { HorizontalOptions = LayoutOptions.End };
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checkBox5.SetBinding(CheckBox.IsCheckedProperty, new MultiBinding
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{
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Bindings = new Collection<BindingBase>
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{
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new Binding("Employee5.IsOver16"),
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new Binding("Employee5.HasPassedTest"),
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new Binding("Employee5.IsSuspended", converter: new InverterConverter())
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},
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Converter = new AllTrueMultiConverter()
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});
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grid.Children.Add(employee1, 0, 1);
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grid.Children.Add(checkBox1, 1, 1);
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grid.Children.Add(employee2, 0, 2);
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grid.Children.Add(checkBox2, 1, 2);
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grid.Children.Add(employee3, 0, 3);
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grid.Children.Add(checkBox3, 1, 3);
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grid.Children.Add(employee4, 0, 4);
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grid.Children.Add(checkBox4, 1, 4);
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grid.Children.Add(employee5, 0, 5);
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grid.Children.Add(checkBox5, 1, 5);
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Title = "MultiBinding converter demo";
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Content = grid;
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}
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}
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}

‎DataBindingDemos/DataBindingDemos/DataBindingDemos/Views/MultiBindingStringFormatCodePage.cs‎

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using System.Collections.ObjectModel;
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using Xamarin.Forms;
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namespace DataBindingDemos
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{
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public class MultiBindingStringFormatCodePage : ContentPage
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{
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public MultiBindingStringFormatCodePage()
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{
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BindingContext = new GroupViewModel();
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Grid grid = new Grid { Margin = new Thickness(20) };
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grid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Auto) });
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grid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Auto) });
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grid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Auto) });
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grid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Auto) });
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grid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Auto) });
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grid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Auto) });
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Label employee1 = new Label();
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employee1.SetBinding(Label.TextProperty, new MultiBinding
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{
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Bindings = new Collection<BindingBase>
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{
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new Binding("Employee1.Forename"),
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new Binding("Employee1.MiddleName"),
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new Binding("Employee1.Surname")
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},
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StringFormat = "{0} {1} {2}"
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});
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Label employee2 = new Label();
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employee2.SetBinding(Label.TextProperty, new MultiBinding
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{
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Bindings = new Collection<BindingBase>
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{
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new Binding("Employee2.Forename"),
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new Binding("Employee2.MiddleName"),
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new Binding("Employee2.Surname")
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},
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StringFormat = "{0} {1} {2}"
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});
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Label employee3 = new Label();
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employee3.SetBinding(Label.TextProperty, new MultiBinding
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{
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Bindings = new Collection<BindingBase>
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{
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new Binding("Employee3.Forename"),
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new Binding("Employee3.MiddleName"),
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new Binding("Employee3.Surname")
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},
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StringFormat = "{0} {1} {2}"
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});
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Label employee4 = new Label();
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employee4.SetBinding(Label.TextProperty, new MultiBinding
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{
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Bindings = new Collection<BindingBase>
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{
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new Binding("Employee4.Forename"),
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new Binding("Employee4.MiddleName"),
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new Binding("Employee4.Surname")
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},
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StringFormat = "{0} {1} {2}"
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});
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Label employee5 = new Label();
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employee5.SetBinding(Label.TextProperty, new MultiBinding
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{
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Bindings = new Collection<BindingBase>
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{
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new Binding("Employee5.Forename"),
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new Binding("Employee5.MiddleName"),
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new Binding("Employee5.Surname")
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},
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StringFormat = "{0} {1} {2}"
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});
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grid.Children.Add(new Label { Text = "Employee", FontAttributes = FontAttributes.Bold });
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grid.Children.Add(employee1, 0, 1);
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grid.Children.Add(employee2, 0, 2);
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grid.Children.Add(employee3, 0, 3);
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grid.Children.Add(employee4, 0, 4);
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grid.Children.Add(employee5, 0, 5);
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Title = "MultiBinding code demo";
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Content = grid;
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}
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}
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}

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