您不能使用注释库旋转注释。您必须使用postpaint
或prepaint
。这是一个如何使用 post-paint 事件的好例子。希望这可以帮助。我将包含以下链接中的代码:
protected void Chart1_PostPaint(object sender, ChartPaintEventArgs e)
{
if (e.ChartElement is Chart)
{
// create text to draw
String TextToDraw;
TextToDraw = "Printed: " + DateTime.Now.ToString("MMM d, yyyy @ h:mm tt");
TextToDraw += " -- Copyright © Steve Wellens";
// get graphics tools
Graphics g = e.ChartGraphics.Graphics;
Font DrawFont = System.Drawing.SystemFonts.CaptionFont;
Brush DrawBrush = Brushes.Black;
// see how big the text will be
int TxtWidth = (int)g.MeasureString(TextToDraw, DrawFont).Width;
int TxtHeight = (int)g.MeasureString(TextToDraw, DrawFont).Height;
// where to draw
int x = 5; // a few pixels from the left border
int y = (int)e.Chart.Height.Value;
y = y - TxtHeight - 5; // a few pixels off the bottom
// draw the string
g.DrawString(TextToDraw, DrawFont, DrawBrush, x, y);
}
}
编辑:我刚刚意识到这个例子实际上并没有旋转文本。我知道你必须使用这个工具,所以我将尝试找到一个使用 postpaint 旋转文本的示例。
编辑2:啊。就在这里。基本上您需要使用该e.Graphics.RotateTransform(270);
属性(该线将旋转 270 度)。