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Add vb code;person example (#1052)
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@@ -55,6 +55,7 @@ For more information about the different terms, see [XAML Syntax In Detail (.NET
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Another way to specify a binding is to set properties directly on a <xref:System.Windows.Data.Binding> object in code, and then assign the binding to a property. The following example shows how to create a <xref:System.Windows.Data.Binding> object in code.
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Another way to specify a binding is to set properties directly on a <xref:System.Windows.Data.Binding> object in code, and then assign the binding to a property. The following example shows how to create a <xref:System.Windows.Data.Binding> object in code.
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:::code language="csharp" source="./snippets/binding-declarations-overview/csharp/DataBindingCode.xaml.cs" id="SetBinding":::
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:::code language="csharp" source="./snippets/binding-declarations-overview/csharp/DataBindingCode.xaml.cs" id="SetBinding":::
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:::code language="vb" source="./snippets/binding-declarations-overview/vb/DataBindingCode.xaml.vb" id="SetBinding":::
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The previous code set the following on the binding:
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The previous code set the following on the binding:
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@@ -65,6 +66,11 @@ The previous code set the following on the binding:
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When the object you're binding is a <xref:System.Windows.FrameworkElement> or a <xref:System.Windows.FrameworkContentElement>, you can call the `SetBinding` method on your object directly instead of using <xref:System.Windows.Data.BindingOperations.SetBinding%2A?displayProperty=nameWithType>. For an example, see [How to: Create a Binding in Code](../../../framework/wpf/data/how-to-create-a-binding-in-code.md).
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When the object you're binding is a <xref:System.Windows.FrameworkElement> or a <xref:System.Windows.FrameworkContentElement>, you can call the `SetBinding` method on your object directly instead of using <xref:System.Windows.Data.BindingOperations.SetBinding%2A?displayProperty=nameWithType>. For an example, see [How to: Create a Binding in Code](../../../framework/wpf/data/how-to-create-a-binding-in-code.md).
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The previous example uses a simple data object type of `Person`. The following is the code for that object:
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:::code language="csharp" source="./snippets/binding-declarations-overview/csharp/Person.cs" id="Person":::
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:::code language="vb" source="./snippets/binding-declarations-overview/vb/Person.vb" id="Person":::
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## Binding path syntax
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## Binding path syntax
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Use the <xref:System.Windows.Data.Binding.Path%2A> property to specify the source value you want to bind to:
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Use the <xref:System.Windows.Data.Binding.Path%2A> property to specify the source value you want to bind to:
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+3
-3
@@ -23,9 +23,9 @@ namespace ArticleExample
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// <Converter>
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// <Converter>
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private class NameConverter : IValueConverter
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private class NameConverter : IValueConverter
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{
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{
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private static NameConverter _instance;
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private static NameConverter _instance = new();
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public static NameConverter Instance => //_instance ??= new NameConverter();
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_instance ?? (_instance = new NameConverter());
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public static NameConverter Instance => _instance;
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public object Convert(object value, Type targetType, object parameter, CultureInfo culture) =>
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public object Convert(object value, Type targetType, object parameter, CultureInfo culture) =>
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$"[[ {value} ]]";
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$"[[ {value} ]]";
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+2
@@ -2,9 +2,11 @@
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namespace ArticleExample
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namespace ArticleExample
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{
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{
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//<Person>
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class Person
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class Person
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{
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{
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public string Name { get; set; }
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public string Name { get; set; }
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public DateTime Birthdate { get; set; }
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public DateTime Birthdate { get; set; }
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}
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}
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//</Person>
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}
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}
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@@ -0,0 +1,9 @@
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<Application x:Class="Application"
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xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
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xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
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xmlns:local="clr-namespace:ArticleExampleVB"
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StartupUri="DataBindingCode.xaml">
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<Application.Resources>
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</Application.Resources>
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</Application>
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Class Application
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' Application-level events, such as Startup, Exit, and DispatcherUnhandledException
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' can be handled in this file.
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End Class
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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<OutputType>WinExe</OutputType>
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<TargetFramework>net5.0-windows</TargetFramework>
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<RootNamespace>ArticleExampleVB</RootNamespace>
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<UseWPF>true</UseWPF>
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</PropertyGroup>
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<ItemGroup>
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<Import Include="System.Windows" />
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<Import Include="System.Windows.Controls" />
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<Import Include="System.Windows.Data" />
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<Import Include="System.Windows.Documents" />
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<Import Include="System.Windows.Input" />
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<Import Include="System.Windows.Media" />
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<Import Include="System.Windows.Media.Imaging" />
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<Import Include="System.Windows.Navigation" />
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<Import Include="System.Windows.Shapes" />
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</ItemGroup>
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</Project>
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Imports System.Windows
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'The ThemeInfo attribute describes where any theme specific and generic resource dictionaries can be found.
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'1st parameter: where theme specific resource dictionaries are located
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'(used if a resource is not found in the page,
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' or application resource dictionaries)
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'2nd parameter: where the generic resource dictionary is located
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'(used if a resource is not found in the page,
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'app, and any theme specific resource dictionaries)
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<Assembly: ThemeInfo(ResourceDictionaryLocation.None, ResourceDictionaryLocation.SourceAssembly)>
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<Window x:Class="DataBindingCode"
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xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
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xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
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xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
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xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
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xmlns:local="clr-namespace:ArticleExampleVB"
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mc:Ignorable="d"
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Title="DataBindingCode" Height="450" Width="800"
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Loaded="Window_Loaded">
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<Border>
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<StackPanel Width="300" Margin="35">
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<Label>Person name:</Label>
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<TextBlock x:Name="NameBlock" Margin="10,0,0,0" />
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</StackPanel>
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</Border>
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</Window>
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+46
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Imports System.Globalization
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Public Class DataBindingCode
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'<Converter>
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Private Class NameConverter
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Implements IValueConverter
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Private Shared _instance As New NameConverter
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Public Shared ReadOnly Instance As NameConverter = _instance
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Public Function Convert(value As Object, targetType As Type, parameter As Object, culture As CultureInfo) As Object Implements IValueConverter.Convert
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Return $"[[ {value} ]]"
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End Function
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Public Function ConvertBack(value As Object, targetType As Type, parameter As Object, culture As CultureInfo) As Object Implements IValueConverter.ConvertBack
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Return value.ToString().Trim("[", "]", " ")
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End Function
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End Class
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'</Converter>
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'<SetBinding>
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Private Sub Window_Loaded(sender As Object, e As RoutedEventArgs)
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' Make a new data source object
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Dim personDetails As New Person() With {
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.Name = "John",
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.Birthdate = Date.Parse("2001-02-03")
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}
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' New binding object using the path of 'Name' for whatever source object is used
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Dim nameBindingObject As New Binding("Name")
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' Configure the binding
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nameBindingObject.Mode = BindingMode.OneWay
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nameBindingObject.Source = personDetails
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nameBindingObject.Converter = NameConverter.Instance
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nameBindingObject.ConverterCulture = New CultureInfo("en-US")
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' Set the binding to a target object. The TextBlock.Name property on the NameBlock UI element
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BindingOperations.SetBinding(NameBlock, TextBlock.TextProperty, nameBindingObject)
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End Sub
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'</SetBinding>
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End Class
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<Window x:Class="MainWindow"
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xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
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xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
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xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
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xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
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xmlns:local="clr-namespace:ArticleExampleVB"
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mc:Ignorable="d"
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Title="MainWindow" Height="450" Width="800">
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<Grid>
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</Grid>
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</Window>
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+3
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Class MainWindow
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End Class
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'<Person>
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Public Class Person
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Public Property Name As String
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Public Property Birthdate As DateTime
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End Class
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'</Person>
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