Ever wanted to create a gradient image dynamically? This can easily be done using C# with the following snipplet of code. We can also specify the width, height, gradient direction (horizontal or vertical), and the two colors.
int intWidth = Convert.ToInt16(txbWidth.Text); int intHeight = Convert.ToInt16(txbHeight.Text); banner.GradientDirection = Convert.ToInt16(rcbDirection.SelectedValue); LinearGradientMode gradientMode; if (banner.GradientDirection == 1) gradientMode = LinearGradientMode.Vertical; else gradientMode = LinearGradientMode.Horizontal; using (Bitmap bitmap = new Bitmap(intWidth, intHeight)) using (Graphics graphics = Graphics.FromImage(bitmap)) using (LinearGradientBrush brush = new LinearGradientBrush(new Rectangle(0, 0, intWidth, intHeight), FirstColor, SecondColor, gradientMode)) { //brush.SetSigmaBellShape(intWidth / 100, intHeight / 100); graphics.FillRectangle(brush, new Rectangle(0, 0, intWidth, intHeight)); MemoryStream stream = new MemoryStream(); bitmap.Save(stream, ImageFormat.Jpeg); Byte[] bytes = stream.ToArray(); }
More info at: http://weblogs.asp.net/whaggard/archive/2004/10/27/248878.aspx
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