zedgraph控件 饼图中显示每个饼块的百分比的标签出现遮挡

饼块遮挡该怎么解决呢？

1、首先下载ZedGraph.dll和ZedGraph.Web.dll文件，引用到项目中，在选择项添加ZedGraphWeb控件。将ZedGraphWeb控件拖到页面

如果程序报错无法加载，检查页面是否有<%@ Register Assembly="ZedGraph.Web" Namespace="ZedGraph.Web" TagPrefix="cc1" %>注册代码，并将dll从项目删除，重新引用。多试几次 

2、页面加载控件无误后： 

protected void Page_Load(object sender, EventArgs e)
  {

ZedGraphWeb1.RenderGraph += new ZedGraph.Web.ZedGraphWebControlEventHandler(ZedGraphWeb1_RenderGraph);//注册事件 

} 


//创建饼图

private void ZedGraphWeb1_RenderGraph(ZedGraph.Web.ZedGraphWeb webObject, System.Drawing.Graphics g, ZedGraph.MasterPane pane)
  {
  graphPane = pane[0]; // 在此之前定义全局变量GraphPane graphPane;
  grap = g; // 在此之前定义全局变量System.Drawing.Graphics grap;
  graphPane.Title.Text = “数据统计”; //给饼图设置title  
  DrawPie(type); //具体画图的方法
  graphPane.AxisChange(g);  
  }


//对饼图的具体操作

private void DrawPie(int num)

{

  DataTable dtyear = new DataTable(); //用于绑定ZedGraphWeb数据
  double huikuan = new double();  
  int zonge = 0; 
  。。。。。。。。。。。。。。。。。 给dtyear 赋值省略

graphPane.Title.Text = titlehehe;
  graphPane.CurveList.Clear();
  graphPane.GraphObjList.Clear();


  // Set the GraphPane title
  graphPane.Title.FontSpec.IsItalic = true;
  graphPane.Title.FontSpec.Size = 24f;
  graphPane.Title.FontSpec.Family = "Times New Roman";

  // Fill the pane background with a color gradient
  graphPane.Fill = new Fill(Color.White, Color.Goldenrod, 45.0f);
  // No fill for the chart background
  graphPane.Chart.Fill.Type = FillType.None;

  // Set the legend to an arbitrary location
  graphPane.Legend.Position = LegendPos.Float;
  graphPane.Legend.Location = new Location(0.95f, 0.15f, CoordType.PaneFraction,
  AlignH.Right, AlignV.Top); //设置饼图显示位置
  graphPane.Legend.FontSpec.Size = 10f; //设置字体大小 
  graphPane.Legend.IsHStack = false;
  TextObj text = new TextObj("", 0.18F, 0.40F, CoordType.ChartFraction);


  graphPane.Fill = new Fill(Color.White, Color.Silver, 45.0f);

  graphPane.Legend.Position = LegendPos.Float;
  graphPane.Legend.Location = new Location(0.99f, 0.15f, CoordType.PaneFraction, AlignH.Right, AlignV.Top);
  graphPane.Legend.FontSpec.Family = "宋体";
  graphPane.Legend.FontSpec.Size = 10;
  graphPane.Legend.IsHStack = false;

   

  具体按数据画图

  double y = 0.00;
  string name1 = "";
  for (int i = 0; i < dtyear.Rows.Count; i++)
  {
  y = Convert.ToDouble(string.IsNullOrEmpty(dtyear.Rows[i]["金额"].ToString()) == true ? "0" : dtyear.Rows[i]["金额"].ToString());
  name1 = dtyear.Rows[i]["日期"].ToString() + "," + dtyear.Rows[i]["金额"].ToString();
  graphPane.AddPieSlice(y, GetRandomColor(), Color.White, 45f, 0, name1);
  }
  dtyear.Rows.Add(new object[] { "总额", huikuan.ToString() });
  GridView1.DataSource = dtyear; //如果要求下面显示列表数据时，给GridView1绑定数据
  GridView1.DataBind();
  dtyear = null;
  CurveList curves = graphPane.CurveList;
  double total = 0;
  for (int x = 0; x < curves.Count; x++)
  total += ((PieItem)curves[x]).Value;
  // Make a text label to highlight the total value
  text.Text = "总额" + huikuan.ToString();

   
  text.Location.AlignH = AlignH.Center;
  text.Location.AlignV = AlignV.Bottom;
  text.FontSpec.Border.IsVisible = false;
  text.FontSpec.Fill = new Fill(Color.White, Color.FromArgb(255, 100, 100), 45F);
  text.FontSpec.StringAlignment = StringAlignment.Center;
  graphPane.GraphObjList.Add(text);
  // Create a drop shadow for the total value text item
  TextObj text2 = new TextObj(text);
  text2.FontSpec.Fill = new Fill(Color.Black);
  text2.Location.X += 0.008f;
  text2.Location.Y += 0.01f;
  graphPane.GraphObjList.Add(text2);
  graphPane.AxisChange(grap);


}




3、创建随机颜色，设置饼图大小


// 创建随机颜色

private Color GetRandomColor()
  {
  Random RandomNum_First = new Random((int)DateTime.Now.Ticks);  
  System.Threading.Thread.Sleep(RandomNum_First.Next(150));
  Random RandomNum_Sencond = new Random((int)DateTime.Now.Ticks);
  System.Threading.Thread.Sleep(RandomNum_Sencond.Next(150));
  Random RandomNum_3 = new Random((int)DateTime.Now.Ticks);

  int int_Red = RandomNum_First.Next(256);
  int int_Green = RandomNum_Sencond.Next(256);
  int int_Blue = RandomNum_3.Next(256);
  // 为了在白色背景上显示，尽量生成深色 
  //int int_Blue = (int_Red + int_Green > 400) ? 0 : 400 - int_Red - int_Green;
  //int_Blue = (int_Blue > 255) ? 255 : int_Blue;

  return Color.FromArgb(int_Red, int_Green, int_Blue);
  }



//设置大小及字体

private void SetSize()
  {
  //保留一个小的页面空白在控件的周围
  ZedGraphWeb1.Width = 1000;
  ZedGraphWeb1.Height = 500;
  ZedGraphWeb1.FontSpec.Family = "宋体";
  ZedGraphWeb1.FontSpec.Size = 12;
  }

程序很好，但是我的问题还是没有得到解决，就是当饼图中的小块很多时，所显示的标签依然会重叠在一起，能不能有一种方法使得这些标签可以自动错开？

应该不能，试试放大你的图。