public void CreateChart( ZedGraphControl zgc )
{
GraphPane myPane = zgc.GraphPane;

// 设置图表的标题和标题的样式
myPane.Title.Text = "2004 ZedGraph Sales by Region\n($M)";
myPane.Title.FontSpec.IsItalic = true;
myPane.Title.FontSpec.Size = 24f;
myPane.Title.FontSpec.Family = "Times New Roman";

// 设置背景色
myPane.Fill = new Fill( Color.White, Color.Goldenrod, 45.0f );
// 设置图表的颜色填充，如果设置为FillType.None,则填充色和背景色相同
myPane.Chart.Fill.Type = FillType.None;

// 设置图例的大小和位置
myPane.Legend.Position = LegendPos.Float;
myPane.Legend.Location = new Location( 0.95f, 0.15f, CoordType.PaneFraction,
AlignH.Right, AlignV.Top );
myPane.Legend.FontSpec.Size = 10f;
myPane.Legend.IsHStack = false;

/*
* 设置饼图的各个部分
* AddPieSlice方法的参数是 value值, 颜色,渐变色,渐变大小,离开中心点的距离,名称
*/
PieItem segment1 = myPane.AddPieSlice( 20, Color.Navy, Color.White, 45f, 0, "North" );
PieItem segment3 = myPane.AddPieSlice( 30, Color.Purple, Color.White, 45f, 0, "East" );
PieItem segment4 = myPane.AddPieSlice( 10.21, Color.LimeGreen, Color.White, 45f, 0, "West" );
PieItem segment2 = myPane.AddPieSlice( 40, Color.SandyBrown, Color.White, 45f, 0.2, "South" );
PieItem segment6 = myPane.AddPieSlice( 250, Color.Red, Color.White, 45f, 0, "Europe" );
PieItem segment7 = myPane.AddPieSlice( 50, Color.Blue, Color.White, 45f, 0.2, "Pac Rim" );
PieItem segment8 = myPane.AddPieSlice( 400, Color.Green, Color.White, 45f, 0, "South America" );
PieItem segment9 = myPane.AddPieSlice( 50, Color.Yellow, Color.White, 45f, 0.2, "Africa" );

zgc.AxisChange();
}