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How can I change the background and foreground colors of a WPF Textbox programmatically in C#?

Peter Mortensen
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Sauron
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8 Answers8

376
textBox1.Background = Brushes.Blue;
textBox1.Foreground = Brushes.Yellow;

WPF Foreground and Background is of type System.Windows.Media.Brush. You can set another color like this:

using System.Windows.Media;

textBox1.Background = Brushes.White;
textBox1.Background = new SolidColorBrush(Colors.White);
textBox1.Background = new SolidColorBrush(Color.FromArgb(0xFF, 0xFF, 0, 0));
textBox1.Background = System.Windows.SystemColors.MenuHighlightBrush;
Oystein
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Timbo
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118

If you want to set the background using a hex color you could do this:

var bc = new BrushConverter();

myTextBox.Background = (Brush)bc.ConvertFrom("#FFXXXXXX");

Or you could set up a SolidColorBrush resource in XAML, and then use findResource in the code-behind:

<SolidColorBrush x:Key="BrushFFXXXXXX">#FF8D8A8A</SolidColorBrush>
myTextBox.Background = (Brush)Application.Current.MainWindow.FindResource("BrushFFXXXXXX");
Peter Mortensen
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Danield
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  • It is much preferable to use `(System.Windows.Media.Brush)Application.Current.FindResource("BrushFFXXXXX");` as your application will not throw a threading exception if it is upgraded to use multiple dispatcher threads in the future. – Contango Nov 08 '16 at 14:46
  • Where should `#FF8D8A8A` be declared? When I try do so inside ` – amy Nov 11 '20 at 17:03
24

I take it you are creating the TextBox in XAML?

In that case, you need to give the text box a name. Then in the code-behind you can then set the Background property using a variety of brushes. The simplest of which is the SolidColorBrush:

myTextBox.Background = new SolidColorBrush(Colors.White);
Peter Mortensen
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James Hay
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7

You can convert hex to RGB:

string ccode = "#00FFFF00";
int argb = Int32.Parse(ccode.Replace("#", ""), NumberStyles.HexNumber);
Color clr = Color.FromArgb(argb);
Peter Mortensen
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Mwaffak Jamal Zakariya
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  • System.Windows.Media.Color FromArgb is accepting byte a, byte r, byte g, byte b, not int – Pawel Jun 15 '21 at 09:21
6

You can use hex colors:

your_contorl.Color = DirectCast(ColorConverter.ConvertFromString("#D8E0A627"), Color)
Perception
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Mwaffak Jamal Zakariya
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4

I know this has been answered in another SOF post. However, you could do this if you know the hexadecimal.

textBox1.Background = (SolidColorBrush)new BrushConverter().ConvertFromString("#082049");
David Palacios
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1

Have you taken a look at Color.FromRgb?

Daniel
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0

BrushConverter bc = new BrushConverter();

textName.Background = (Brush)bc.ConvertFrom("#FF7BFF64");

buttonName.Foreground = new SolidColorBrush(Colors.Gray);

Reference Here https://www.it-mure.jp.net/ja/c%23/c%EF%BC%83%E3%82%B3%E3%83%BC%E3%83%89%E3%81%A7wpf%E3%83%86%E3%82%AD%E3%82%B9%E3%83%88%E3%83%9C%E3%83%83%E3%82%AF%E3%82%B9%E3%81%AE%E8%83%8C%E6%99%AF%E8%89%B2%E3%82%92%E8%A8%AD%E5%AE%9A%E3%81%99%E3%82%8B/957683208/

Khine Thu
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