Xamarin表单图表-绘制图像

Question

是否有一个在xamarin表单中绘制图像的工作示例?

Answer 1

将图像分配给后墙或面板都不起作用:

  var backImage = new Image();
  backImage.Source = ImageSource.FromUri(new Uri("http://www.steema.com/uploads/news/xamarinforms_280x210.png"));
  tChart1.Walls.Back.Gradient.Visible = false;
  tChart1.Walls.Back.Image = backImage;
  tChart1.Panel.Gradient.Visible = false;
  tChart1.Panel.Image = backImage;

而不是直接画在画布上:

void tChart1_BeforeDrawSeries(object sender, Graphics3D g)
{
  Rectangle chartRect = tChart1.Chart.ChartRect;
  var backImage = new Image();
  backImage.Source = ImageSource.FromUri(new Uri("http://www.steema.com/uploads/news/xamarinforms_280x210.png"));
  g.Draw(chartRect, chartRect, backImage, false);
}

所以我把这个添加到bug列表(bug 1299)。iOS和Android都有