How can I bind ComboBox.TextBlock in C#

Question

I'm trying to convert some XAML to C# code. Here's the xaml:

<ComboBox TextBlock.Foreground="{Binding DesiredForegroundBrush}"/>

I'd like to do the same thing in C# code, but I'm at a loss on how to access the TextBlock.

I tried the following:

 ComboBoxInstance.TextBlock.SetBinding(TextBlock.ForegroundProperty, "DesiredForegroundBrush");

But the TextBlock is not accessible in C# code.

I also tried getting to the child of the combo box, but the GetChildrenCount returns 0:

 var childrenCount = VisualTreeHelper.GetChildrenCount(ComboBoxInstance);

I did a few web searches but all I found was questions about how to bind combo boxes to TextBoxes.

I feel like there has to be an easy way to do this. Any help would be appreciated!

Update:

I have found this post:

How to I access an attached property in code behind?

But that only shows how to directly assign the property in the code behind, as opposed to set up binding on it.

You can try `comboBoxTest.SetBinding( TextBlock.ForegroundProperty, new Binding( "DesiredForegroundBrush" ) );` Are there some problems with this? — bars222, Jan 29 '16 at 05:46

score 2 · Accepted Answer · answered Jan 29 '16 at 13:34

2

use ComboBox.ForegroundProperty to bind the foreground Color. Why do you want the textbox ?

answered Jan 29 '16 at 13:34

score 0 · Answer 2 · answered Jan 29 '16 at 16:26

Every control derived from "Control" class will have Foreground property which is a dependency property and could be bound to any Brush value. To change the value of any control foreground we don't need to dig for the property.

<ComboBox Background="{Binding ForegroundColorBrush}"/>

and combobox foreground color will change according to binding.

How can I bind ComboBox.TextBlock in C#

2 Answers2