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Links: .NET Desktop - framework\wpf (#109)
* Links: .NET Desktop - framework\wpf * Apply suggestions from code review Co-authored-by: Andy De George <[email protected]>
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ms.assetid: 1a606db9-cf5f-42ed-a1c5-9e4722ec77a0
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---
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# How to: Create a Binding in Code
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This example shows how to create and set a <xref:System.Windows.Data.Binding> in code.
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## Example
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The <xref:System.Windows.FrameworkElement> class and the <xref:System.Windows.FrameworkContentElement> class both expose a `SetBinding` method. If you are binding an element that inherits either of these classes, you can call the <xref:System.Windows.FrameworkElement.SetBinding%2A> method directly.
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The following example creates a class named, `MyData`, which contains a property named `MyDataProperty`.
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[!code-csharp[CodeOnlyBinding#1](~/samples/snippets/csharp/VS_Snippets_Wpf/CodeOnlyBinding/CSharp/binding.cs#1)]
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[!code-vb[CodeOnlyBinding#1](~/samples/snippets/visualbasic/VS_Snippets_Wpf/CodeOnlyBinding/VisualBasic/App.vb#1)]
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For the complete code sample, see [Code-only Binding Sample](https://docs.microsoft.com/previous-versions/dotnet/netframework-3.5/ms771500(v=vs.90)).
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For the complete code sample, see [Code-only Binding Sample](/previous-versions/dotnet/netframework-3.5/ms771500(v=vs.90)).
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Instead of calling <xref:System.Windows.FrameworkElement.SetBinding%2A>, you can use the <xref:System.Windows.Data.BindingOperations.SetBinding%2A> static method of the <xref:System.Windows.Data.BindingOperations> class. The following example, calls <xref:System.Windows.Data.BindingOperations.SetBinding%2A?displayProperty=nameWithType> instead of <xref:System.Windows.FrameworkElement.SetBinding%2A?displayProperty=nameWithType> to bind `myText` to `myDataProperty`.
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ms.assetid: d63b65ab-b3e9-4322-9aa8-1450f8d89532
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---
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# How to: Implement PriorityBinding
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<xref:System.Windows.Data.PriorityBinding> in [!INCLUDE[TLA#tla_winclient](../../../includes/tlasharptla-winclient-md.md)] works by specifying a list of bindings. The list of bindings is ordered from highest priority to lowest priority. If the highest priority binding returns a value successfully when it is processed then there is never a need to process the other bindings in the list. It could be the case that the highest priority binding takes a long time to be evaluated, the next highest priority that returns a value successfully will be used until a binding of a higher priority returns a value successfully.
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## Example
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To demonstrate how <xref:System.Windows.Data.PriorityBinding> works, the `AsyncDataSource` object has been created with the following three properties: `FastDP`, `SlowerDP`, and `SlowestDP`.
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The get accessor of `FastDP` returns the value of the `_fastDP` data member.
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The get accessor of `SlowestDP` waits for 5 seconds before returning the value of the `_slowestDP` data member.
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> [!NOTE]
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> This example is for demonstration purposes only. The .NET guidelines recommend against defining properties that are orders of magnitude slower than a field set would be. For more information, see [Choosing Between Properties and Methods](https://docs.microsoft.com/previous-versions/dotnet/netframework-4.0/ms229054(v=vs.100)).
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> This example is for demonstration purposes only. The .NET guidelines recommend against defining properties that are orders of magnitude slower than a field set would be. For more information, see [Choosing Between Properties and Methods](/previous-versions/dotnet/netframework-4.0/ms229054(v=vs.100)).
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[!code-csharp[PriorityBinding#1](~/samples/snippets/csharp/VS_Snippets_Wpf/PriorityBinding/CSharp/Window1.xaml.cs#1)]
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[!code-vb[PriorityBinding#1](~/samples/snippets/visualbasic/VS_Snippets_Wpf/PriorityBinding/VisualBasic/AsyncDataSource.vb#1)]
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- [LINQ to XML Dynamic Properties](linq-to-xml-dynamic-properties.md)
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- [XAML in WPF](../advanced/xaml-in-wpf.md)
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- [Data Binding (WPF)](/dotnet/framework/wpf/data/data-binding-wpf)
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- [Using Workflow Markup](https://docs.microsoft.com/previous-versions/dotnet/netframework-3.5/ms735921(v=vs.90))
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- [Using Workflow Markup](/previous-versions/dotnet/netframework-3.5/ms735921(v=vs.90))
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