The community is working on translating this tutorial into Danish, but it seems that no one has started the translation process for this article yet. If you can help us, then please click "More info".
If you are fluent in Danish, then please help us - just point to any untranslated element (highlighted with a yellow left border - remember that images should have their titles translated as well!) inside the article and click the translation button to get started. Or have a look at the current translation status for the Danish language.
If you see a translation that you think looks wrong, then please consult the original article to make sure and then use the vote button to let us know about it.
Please help us by translating the following metadata for the article/chapter, if they are not already translated.
If you are not satisfied with the translation of a specific metadata item, you may vote it down - when it reaches a certain negative threshold, it will be removed. Please only submit an altered translation of a metadata item if you have good reasons to do so!
Data binding via Code-behind
As we saw in the previous data binding examples, defining a binding by using XAML is very easy, but for certain cases, you may want to do it from Code-behind instead. This is pretty easy as well and offers the exact same possibilities as when you're using XAML. Let's try the "Hello, bound world" example, but this time create the required binding from Code-behind:
Title="CodeBehindBindingsSample" Height="110" Width="280">
<TextBox Name="txtValue" />
<TextBlock Text="Value: " FontWeight="Bold" />
<TextBlock Name="lblValue" />
public partial class CodeBehindBindingsSample : Window
Binding binding = new Binding("Text");
binding.Source = txtValue;
It works by creating a Binding instance. We specify the path we want directly in the constructor, in this case "Text", since we want to bind to the Text property. We then specify a Source, which for this example should be the TextBox control. Now WPF knows that it should use the TextBox as the source control, and that we're specifically looking for the value contained in its Text property.
In the last line, we use the SetBinding method to combine our newly created Binding object with the destination/target control, in this case the TextBlock (lblValue). The SetBinding() method takes two parameters, one that tells which dependency property that we want to bind to, and one that holds the binding object that we wish to use.
As you can see, creating bindings in C# code is easy, and perhaps a bit easier to grasp for people new to data bindings, when compared to the syntax used for creating them inline in XAML. Which method you use is up to you though - they both work just fine.