Gradiente lineare multicolore in WinForms

Question

Come creare un gradiente lineare multicolore in WinForms? System.Drawing.Drawing2D.LinearGradientBrush consente solo due colori.

Answer 1

stessa risposta qui: Multi-color di pendenza diagonale in WinForms Multi-color diagonal gradient in winforms

Ecco un piccolo esempio

void MainFormPaint(object sender, PaintEventArgs e) 
{ 
    LinearGradientBrush br = new LinearGradientBrush(this.ClientRectangle, Color.Black, Color.Black, 0 , false); 
    ColorBlend cb = new ColorBlend(); 
    cb.Positions = new[] {0, 1/6f, 2/6f, 3/6f, 4/6f, 5/6f, 1}; 
    cb.Colors = new[] {Color.Red, Color.Orange, Color.Yellow, Color.Green, Color.Blue, Color.Indigo, Color.Violet}; 
    br.InterpolationColors= cb; 
    // rotate 
    br.RotateTransform(45); 
    // paint 
    e.Graphics.FillRectangle(br, this.ClientRectangle); 
} 

Ecco il risultato

Spero che questo aiuti