piechart.cs

c#编写的人事管理系统源码 写得不错 值得收藏

using System;
using System.ComponentModel;
using System.Windows.Forms;
using System.Text;
using System.Collections;
using System.IO;//用于文件存取 
using System.Data;//用于数据访问
using System.Data.OleDb;
using System.Drawing;//提供画GDI+图形的基本功能 
using System.Drawing.Imaging;//提供画GDI+图形的高级功能 
using System.Drawing.Text;//提供画高级二维，矢量图形功能 
using System.Drawing.Drawing2D;//提供画GDI+图形的高级功能 
namespace PM
{
	/// <summary>
	/// PieChart 的摘要说明。
	/// </summary>
	public class PieChart
	{
		public PieChart(){}


		/// <summary>
		/// 画饼图统计图
		/// </summary>
		/// <param name="title">大标题</param>
		/// <param name="subTitle">小标题</param>
		/// <param name="width">画布的宽</param>
		/// <param name="height">画布的长</param>
		/// <param name="chartdata">提供给饼型统计图的数据</param>
		/// <returns></returns>
		#region  画饼图统计图
		//Render是图形大标题，图开小标题，图形宽度，图形长度，饼图的数据集
		public static Image Render(string title, string subTitle, int width, int height,ChartData chartdata)
		{
		    const int SIDE_LENGTH = 600;//画布边长
			const int PIE_DIAMETER = 200;//饼图直径 
			ChartData cd = chartdata;
            //通过输入的参数，取得饼图中的总基数
            float sumData = 0;
			for(int i = 0 ; i < cd.DataName.Count ; i ++)
			{
			    sumData += float.Parse(cd.DataValue[i].ToString());
			}
			Bitmap btp = new Bitmap(width,height);
			Graphics g = Graphics.FromImage(btp);
			g.ScaleTransform(Convert.ToSingle(width)/SIDE_LENGTH,Convert.ToSingle(height)/SIDE_LENGTH);
			//获取呈现的图象质量
			g.SmoothingMode = SmoothingMode.Default;
			//获取文本呈现模式
			g.TextRenderingHint = TextRenderingHint.AntiAlias;
			//设定画布和边
			g.Clear(Color.White);
			g.DrawRectangle(Pens.Black,0,0,SIDE_LENGTH-1,SIDE_LENGTH-1);
			//画饼图标题
			g.DrawString(title,new Font("Tahoma",24),Brushes.Black,new PointF(5,5));
			//画饼图子标题
			g.DrawString(subTitle,new Font("Tahoma",12),Brushes.Black,new PointF(7,35));
			//画饼图
			float curAngle = 0;
			float totalAngle = 0;
			for(int i=0;i<cd.DataValue.Count;i++)
			{
				curAngle = Convert.ToSingle(float.Parse(cd.DataValue[i].ToString())) / sumData * 360;
				g.FillPie(new SolidBrush(ChartUtil.GetChartItemColor(i)),100,65,PIE_DIAMETER,PIE_DIAMETER,totalAngle,curAngle);
				g.DrawPie(Pens.Black,100,65,PIE_DIAMETER,PIE_DIAMETER,totalAngle,curAngle); 
				totalAngle += curAngle;
			} 

			//画图例框及其文字 
			g.DrawRectangle(Pens.Black,400,40,199,500);
			g.DrawString("图表说明",new Font("Tahoma",12,FontStyle.Bold),Brushes.Black,new PointF(400,50)); 
			//画图例各项 
			PointF boxOrigin = new PointF(410,80); 
			PointF textOrigin = new PointF(435,80); 
			float percent = 0; 
			for(int i=0;i<cd.DataValue.Count;i++)
			{
			    g.FillRectangle(new SolidBrush(ChartUtil.GetChartItemColor(i)),boxOrigin.X,boxOrigin.Y,20,10);
			    g.DrawRectangle(Pens.Black,boxOrigin.X,boxOrigin.Y,20,10); 
				percent = Convert.ToSingle(float.Parse(cd.DataValue[i].ToString())) / sumData * 100;
				g.DrawString(cd.DataName[i].ToString()+ " (" + percent.ToString("0") + "%)",new Font("Tahoma",10),Brushes.Black,textOrigin);
				boxOrigin.Y += 15;
				textOrigin.Y += 15;
			} 
			//回收资源 
			g.Dispose(); 
			return (Image) btp; 
		}
		#endregion

		/// <summary>
		/// 画柱型统计图
		/// </summary>
		/// <param name="title">大标题</param>
		/// <param name="subTitle">小标题</param>
		/// <param name="width">画布的宽</param>
		/// <param name="height">画布的长</param>
		/// <param name="chartdata">提供给柱型统计图的数据</param>
		/// <returns></returns>
		#region  画柱型统计图
		public static Image Render1(string title, string subTitle, int width, int height, ChartData chartdata) 
		{ 
			const int SIDE_LENGTH = 600; 
			const int CHART_TOP = 75; 
			const int CHART_HEIGHT = 200; 
			const int CHART_LEFT = 50; 
			const int CHART_WIDTH = 300; 
            ChartData cd = chartdata;
			//计算最高的点 
			float highPoint = 0; 
			for(int i = 0 ; i < cd.DataName.Count ; i ++)
			{
				if(float.Parse(cd.DataValue[i].ToString()) > float.Parse(cd.DataValue[0].ToString()))
				{
				    highPoint = float.Parse(cd.DataValue[i].ToString());
				}
			}
			//建立一个Graphics对象实例 
			Bitmap bm = new Bitmap(width,height); 
			try
			{
				Graphics g = Graphics.FromImage(bm); 
				//设置条图图形和文字属性 
				g.ScaleTransform((Convert.ToSingle(width))/SIDE_LENGTH,(Convert.ToSingle(height))/SIDE_LENGTH); 
				g.SmoothingMode = SmoothingMode.Default; 
				g.TextRenderingHint = TextRenderingHint.AntiAlias; 
   
				//设定画布和边 
				g.Clear(Color.White); 
				g.DrawRectangle(Pens.Black,0,0,SIDE_LENGTH-1,SIDE_LENGTH-1); 
				//画大标题 
				g.DrawString(title,new Font("Tahoma",24),Brushes.Black,new PointF(5,5)); 
				//画小标题 
				g.DrawString(subTitle,new Font("Tahoma",12),Brushes.Black,new PointF(7,35)); 
				//画条形图 
				float barWidth = CHART_WIDTH / (cd.DataValue.Count * 2);//分多少条条形型图,同时条形图的间隔是一条条形图的间隔 
				PointF barOrigin = new PointF(CHART_LEFT + (barWidth / 2),0); 
				float barHeight = cd.DataValue.Count; 
				for(int i = 0 ; i < cd.DataValue.Count ; i ++) 
				{ 
					barHeight = Convert.ToSingle(cd.DataValue[i].ToString()) * 200 / highPoint * 1; 
					barOrigin.Y = CHART_TOP + CHART_HEIGHT - barHeight; 
					g.FillRectangle(new SolidBrush(ChartUtil.GetChartItemColor(i)),barOrigin.X,barOrigin.Y,barWidth,barHeight); 
					barOrigin.X = barOrigin.X + (barWidth * 2); 
				} 
				//设置边 
				g.DrawLine(new Pen(Color.Black,2),new Point(CHART_LEFT,CHART_TOP),new Point(CHART_LEFT,CHART_TOP + CHART_HEIGHT)); 
				g.DrawLine(new Pen(Color.Black,2),new Point(CHART_LEFT,CHART_TOP + CHART_HEIGHT),new Point(CHART_LEFT + CHART_WIDTH,CHART_TOP + CHART_HEIGHT)); 
				//画图例框和文字 
				g.DrawRectangle(new Pen(Color.Black,1),400,40,199,500); 
				g.DrawString("图表说明",new Font("Tahoma",12,FontStyle.Bold),Brushes.Black,new PointF(400,40)); 
   
				//画图例 
				PointF boxOrigin = new PointF(410,80); 
				PointF textOrigin = new PointF(435,80); 
				for(int i=0;i<cd.DataName.Count;i++) 
				{ 
					g.FillRectangle(new SolidBrush(ChartUtil.GetChartItemColor(i)),boxOrigin.X,boxOrigin.Y,20,10); 
					g.DrawRectangle(Pens.Black,boxOrigin.X,boxOrigin.Y,20,10); 
					g.DrawString(cd.DataName[i].ToString() + " - " + cd.DataValue[i].ToString(),new Font("Tahoma",10),Brushes.Black,textOrigin); 
					boxOrigin.Y += 15; 
					textOrigin.Y += 15; 
				} 
				//输出图形 
				g.Dispose(); 
				return bm;
			}
			catch
			{
				return bm;
			}   
		} 
	}
	#endregion

	/// <summary>
	/// 统计图颜色的选择
	/// </summary>
	#region  统计图颜色的选择
	public class ChartUtil 
	{
		public ChartUtil(){}
		public static Color GetChartItemColor(int itemIndex) 
		{ 
			Color selectedColor; 
			switch(itemIndex) 
			{ 
				case 0: 
					selectedColor = Color.Blue; 
					break; 
				case 1: 
					selectedColor = Color.Red; 
					break; 
				case 2: 
					selectedColor = Color.Yellow; 
					break; 
				case 3: 
					selectedColor = Color.Purple; 
					break; 
				case 4: 
					selectedColor = Color.Green; 
					break; 
				case 5: 
					selectedColor = Color.Plum;
					break;
				case 6: 
					selectedColor = Color.RosyBrown;
					break;
				default:
					selectedColor = Color.Salmon;
					break;
			} 
			return selectedColor; 
		} 
	}
	#endregion

	/// <summary>
	/// 自定义数据类。
	/// 用来存的数据是一对的数据，例如（“女” 100）表示女的有100个
	/// </summary>
	#region  自定义数据类
	public class ChartData
	{
		//存储的内容
		private ArrayList dataName;
		//存储内容的数量
		private ArrayList dataValue;
        #region 内容的属性
		public ArrayList DataName
		{
			get
			{
			    return dataName;
			}
			set
			{
			    dataName = value;
			}
		}
		#endregion

        #region 数量的属性
		public ArrayList DataValue
		{
			get
			{
				return dataValue;
			}
			set
			{
				dataValue = value;
			}
		}
		#endregion

        #region  无参数构造函数
		public ChartData()
		{
		    this.dataName = new ArrayList();
			this.dataValue = new ArrayList();
		}
		#endregion

		#region 参数为两个ArrayList构造函数
		public ChartData(ArrayList tempdataName,ArrayList tempdataValue)
		{
		    this.dataName = tempdataName;
			this.dataValue = tempdataValue;
		}
		#endregion

		#region 增加元素方法
		public void Add(string tempName, float tempValue)
		{
		    this.dataName.Add(tempName);
			this.dataValue.Add(tempValue);
		}
		#endregion

		#region 删除元素的方法
		public bool Remove(string tempName,float tempValue)
		{
			if(dataName.BinarySearch(tempName) > 0 && dataValue.BinarySearch(tempValue) > 0)
			{
				dataName.Remove(tempName);
				dataValue.Remove(tempValue);
				return true;
			}
		    else
			{
				return false;
			}
		}
		#endregion
	}
	#endregion 
}