(...) doesn't exist in the current context - Gradient and others brushes

Question

I saw a way to make a form's background color Gradient.

That was done by a GradientBrush but when I try that, it says it doesn't exist.

I wrote like this:

GradientBrush something = New GradientBrush();

In the output window I see the "doesn't exist in the current context" error.

What are you targetting: Winforms? WPF? ASP? ...?? __Always__ tag your question accordingly! - As the `GradientBrush` is not recognized I assum Winforms. See my answer how to create a simple gradient in Winforms! — TaW, Sep 16 '15 at 23:01

score 1 · Answer 1 · answered Sep 16 '15 at 17:40

1

You might want to add the System.Windows.Media nampespace to your application simply add.

using System.Windows.Media;

Then the compiler would recoginize this class.

Goodluck.

answered Sep 16 '15 at 17:40

Slashy

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score 0 · Accepted Answer · edited May 23 '17 at 12:22

In a winforms Form you could do this:

using  System.Drawing.Drawing2D;
...
...

private void Form1_Paint(object sender, PaintEventArgs e)
{
    using (LinearGradientBrush br = new
            LinearGradientBrush(Form1.ClientRectangle, Color.Wheat, Color.DimGray, 0f))
        e.Graphics.FillRectangle(br, Form1.ClientRectangle);
}

To get rid of flicker set the form to DoubleBuffered = true;

For more colors use the multicolor overload of the LinearGradientBrush! For an example see here!

If the background is fixed you may consider creating a Bitmap with the gradient. Perfect if the user will not resize the form..:

Bitmap form1Back = new Bitmap(form1.ClientSize.Width, form1.ClientSize.Height);
using (Graphics G = Graphics.FromImage(form1Back))
using (LinearGradientBrush br = new 
       LinearGradientBrush( form2.ClientRectangle, Color.Wheat, Color.DimGray, 0f))
    G.FillRectangle(br, form2.ClientRectangle);
form1.BackgroundImage = form1Back;

(...) doesn't exist in the current context - Gradient and others brushes

2 Answers2