如何在Winform的面板中显示Piechart

Question

我在winform中创建Piechart.My图表即将上线。我唯一想要添加的是在Panel中显示Piechart，但我无法做到这一点。

这里是饼图的代码..

public void DrawPieChartOnForm() 
    { 
     //Take Total Five Values & Draw Chart Of These Values. 
     int[] myPiePercent = { 10, 20, 25, 5, 40 }; 

     //Take Colors To Display Pie In That Colors Of Taken Five Values. 
     Color[] myPieColors = { Color.Red, Color.Black, Color.Blue, Color.Green, Color.Maroon }; 

     using (Graphics myPieGraphic = this.CreateGraphics()) 
     { 
      //Give Location Which Will Display Chart At That Location. 
      Point myPieLocation = new Point(10, 400); 

      //Set Here Size Of The Chart… 
      Size myPieSize = new Size(500, 500); 

      //Call Function Which Will Draw Pie of Values. 
      DrawPieChart(myPiePercent, myPieColors, myPieGraphic, myPieLocation, myPieSize); 
     } 
    } 

请帮助我.. 在此先感谢..

Answer 1

您需要了解WinForms Graphics的基础知识。

把你的饼到Panel代替Form，因为你现在拥有它，你只需要改变this.CreateGraphics()到panel.CreateGraphics()。 但这不行！当你最小化你的表格时，你的派消失了.. ..？

所以，所有图纸必须发生/从一个Paint事件触发，利用其e.Graphics对象！只有这样，绘画才能坚持各种各样的外部事件。

你可以存储在类级别的数据，并调用DrawPieChart在Paint事件Panel的，移交在e.Graphics代替myPieGraphic ..使用panel.Invalidate()触发Paint事件时，你已经改变了价值观..：

//Five Values at class level 
int[] myPiePercent = { 10, 20, 25, 5, 40 }; 

//Take Colors To Display Pie In That Colors Of Taken Five Values. 
Color[] myPieColors = { Color.Red, Color.Black, Color.Blue, Color.Green, Color.Maroon }; 


public void DrawPieChart() 
{ 
    // maybe change the values here.. 
    myPiePercent = { 11, 22, 23, 15, 29 }; 
    // then let Paint call the draw routine: 
    panel1.Invalidate(); 

} 

private void panel1_Paint(object sender, PaintEventArgs e) 
{ 

    //Give Location Which Will Display Chart At That Location. 
    Point myPieLocation = new Point(10, 400); 

    //Set Size Of The Chart 
    Size myPieSize = new Size(500, 500); 

    //Call Function Which Will Draw Pie of Values. 
    DrawPieChart(myPiePercent, myPieColors, e.Graphics, myPieLocation, myPieSize); 

} 

Answer 2

看看这篇文章了Hiren Khirsaria：

hirenkhirsaria.blogspot.com/2012/06/dynamically-creating-piebar-chart-in-c.html

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我认为你需要待办事项是要建立一个控制来处理的饼图，只是添加它面板上的东西。 类似于：

panel.Controls.Add(pieChart);