asp.net怎么绘圆饼图

[w161134025]

asp.net怎么绘圆饼图,简单点的,我还不会画

[wuyq11]

http://www.cnblogs.com/andy6888/archive/2006/09/04/494084.aspx

[evjen]

我这里只有柱状图 饼图 楼主看看 也许对你又帮助的哦

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Drawing;
using System.Drawing.Design;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.Drawing.Text;
namespace AspNet.GDI
{
    /// <summary>
    //  GDI绘图类
    /// </summary>

    
    public class GDIpictrue
    {
      
        public GDIpictrue()
        {
            
        }
        /// <summary>
        // 绘制饼形图方法
        /// </summary>

        public static string pievalue(string title, string subTitle, int width, int height, Pievalue[] Mydata)
        {
            const int SIDE_LENGTH = 400;
            const int PIE_DIAMETER = 200;
            float sumData = 0;
            for (int i = 0; i < Mydata.Length; i++)
            {
                sumData += Convert.ToSingle(Mydata[i].MValue);
            }

            Bitmap bm = new Bitmap(width, height);
            Graphics g = Graphics.FromImage(bm);

            g.Clear(Color.White);
            g.DrawRectangle(Pens.Black,0,0, SIDE_LENGTH -50, SIDE_LENGTH -1);

            g.DrawString(title, new Font("Tahoma", 12), Brushes.Black, new PointF(5, 5));

            g.DrawString(subTitle, new Font("Tahoma", 12), Brushes.Black, new PointF(7, 35));

            float curAngle = 0;
            float totalAngle = 0;
            for (int j = 0; j < Mydata.Length; j++)
            {
                curAngle = Convert.ToSingle(Mydata[j].MValue) / sumData * 360;

                g.FillPie(new SolidBrush(ChartUtil.GetChartItemColor(j)), 100, 55, PIE_DIAMETER, PIE_DIAMETER, totalAngle, curAngle);
                g.DrawPie(Pens.Black, 100, 55, PIE_DIAMETER, PIE_DIAMETER, totalAngle, curAngle);
                totalAngle += curAngle;
            }

            g.DrawRectangle(Pens.Black, 350, 90, 399, 299);
            g.DrawString("图表说明", new Font("Tahoma", 12, FontStyle.Bold), Brushes.Black, new PointF(350,70));

            PointF boxOrigin = new PointF(360,100);
            PointF textOrigin = new PointF(385, 96);
            float percent = 0;
            for (int k = 0; k < Mydata.Length; k++)
            {
                g.FillRectangle(new SolidBrush(ChartUtil.GetChartItemColor(k)), boxOrigin.X, boxOrigin.Y, 20, 10);
                g.DrawRectangle(Pens.Black, boxOrigin.X, boxOrigin.Y, 20, 10);
                percent = Convert.ToSingle(Mydata[k].MValue) / sumData * 100;
                g.DrawString(Mydata[k].MValue.ToString("0.00") + " - " + Mydata[k].Name.ToString() + " (" + percent.ToString("0.00") + "%)", new Font("Tahoma", 12), Brushes.Black, textOrigin);
                boxOrigin.Y += 15;
                textOrigin.Y += 15;
            }

            g.Dispose();

            System.Drawing.Image MyImage = (System.Drawing.Image)bm;
            string TruePath = System.Web.HttpContext.Current.Server.MapPath("~/images");
            string TrueName = DateTime.Now.ToString("yyyyMMddhhmmss") + DateTime.Now.Millisecond;
            MyImage.Save(TruePath + "\\" + TrueName + ".jpg", System.Drawing.Imaging.ImageFormat.Gif);
            return "~/images/" + TrueName + ".jpg";
        }
       }

[evjen]

 /// <summary>
        // 绘制柱形图方法
        /// </summary>

        public static string BarChar(string title, string subTitle, int width, int height, BarChartValue[] Mydata)
        {
            const int SIDE_LENGTH = 400;
            const int CHART_TOP = 75;
            const int CHART_HEIGHT = 200;
            const int CHART_LEFT = 50;
            const int CHART_WIDTH = 300;
　　　　　　float highPoint = 0;
            for (int i = 0; i < Mydata.Length; i++)
            {
                if (highPoint < Convert.ToSingle(Mydata[i].MValue))
                {
                    highPoint = Convert.ToSingle(Mydata[i].MValue);
                }
            }

            Bitmap bm = new Bitmap(width, height);

            Graphics g = Graphics.FromImage(bm);
            g.ScaleTransform((Convert.ToSingle(width)) / SIDE_LENGTH, (Convert.ToSingle(height)) / SIDE_LENGTH);
            g.SmoothingMode = SmoothingMode.Default;
            g.TextRenderingHint = TextRenderingHint.AntiAlias;
            g.Clear(Color.White);
            g.DrawRectangle(Pens.Black, 0, 0, SIDE_LENGTH - 1, SIDE_LENGTH - 1);

            g.DrawString(title, new Font("Tahoma", 14), Brushes.Black, new PointF(5, 5));

            g.DrawString(subTitle, new Font("Tahoma", 12), Brushes.Black, new PointF(7, 35));

            float barWidth = CHART_WIDTH / (Mydata.Length * 2);
            PointF barOrigin = new PointF(CHART_LEFT + (barWidth / 2), 0);
            float barHeight = Mydata.Length;
            for (int i = 0; i < Mydata.Length; i++)
            {
                barHeight = Convert.ToSingle(Mydata[i].MValue) * 200 / highPoint * 1;
                barOrigin.Y = CHART_TOP + CHART_HEIGHT - barHeight;
                g.FillRectangle(new SolidBrush(ChartUtil.GetChartItemColor(i)), barOrigin.X, barOrigin.Y, barWidth + 5, barHeight);



                g.DrawString(Mydata[i].Name, new Font("Tahoma",12), Brushes.Black, new PointF(barOrigin.X - 3, 277));



                barOrigin.X = barOrigin.X + (barWidth * 2);
            }

            g.DrawLine(new Pen(Color.Black, 2), new Point(CHART_LEFT, CHART_TOP-45), 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));

            g.DrawRectangle(new Pen(Color.Black, 1), 50,300, 299, 110);
            g.DrawString("图表说明", new Font("Tahoma", 8, FontStyle.Bold), Brushes.Black, new PointF(5, 290));

            PointF boxOrigin = new PointF(60, 310);
            PointF textOrigin = new PointF(80, 306);
            for (int i = 0; i < Mydata.Length; i++)
            {
                g.FillRectangle(new SolidBrush(ChartUtil.GetChartItemColor(i)), boxOrigin.X, boxOrigin.Y, 20, 10);
                g.DrawRectangle(Pens.Black, boxOrigin.X, boxOrigin.Y, 2, 1);
                g.DrawString(Mydata[i].Name.ToString() + "月份" + " - " + Mydata[i].MValue.ToString("0.00"), new Font("Tahoma", 10), Brushes.Black, textOrigin);
                if (i < 5)
                {
                    boxOrigin.Y += 15;
                    textOrigin.Y += 15;
                }
                else if (i == 5)
                {
                    boxOrigin.X = 208;
                    boxOrigin.Y = 310;
                    textOrigin.X = 230;
                    textOrigin.Y = 306;

                }
                else
                {
                    boxOrigin.Y += 15;
                    textOrigin.Y += 15;
                }

            }

            g.Dispose();
            System.Drawing.Image MyImage = (System.Drawing.Image)bm;
            string TruePath = System.Web.HttpContext.Current.Server.MapPath("~/images");
            string TrueName = DateTime.Now.ToString("yyyyMMddhhmmss") + DateTime.Now.Millisecond;
            MyImage.Save(TruePath + "\\" + TrueName + ".jpg", System.Drawing.Imaging.ImageFormat.Gif);
            return "~/images/" + TrueName + ".jpg";


        }
    }

　　/// <summary>
    ///颜色设置
    /// </summary>
    public class ChartUtil
    {
        public ChartUtil()
        {
        }
        public static Color GetChartItemColor(int itemIndex)
        {
            Color selectedColor;
            switch (itemIndex)
            {
                case 0:
                    selectedColor =Color.YellowGreen;
                    break;
                case 1:
                    selectedColor = Color.Red;
                    break;
                case 2:
                    selectedColor = Color.Yellow;
                    break;
                case 3:
                    selectedColor = Color.PaleVioletRed;
                    break;
                case 4:
                    selectedColor = Color.Aqua;
                    break;
                case 5:
                    selectedColor = Color.Aquamarine;
                    break;
                case 6:
                    selectedColor = Color.Azure;
                    break;
                case 7:
                    selectedColor = Color.SteelBlue;
                    break;
                case 8:
                    selectedColor = Color.RoyalBlue;
                    break;
                case 9:
                    selectedColor = Color.Blue;
                    break;
                case 10:
                    selectedColor = Color.Coral;
                    break;
                case 11:
                    selectedColor = Color.DarkCyan;
                    break;
                case 12:
                    selectedColor = Color.Green;
                    break;
                default:
                    selectedColor = Color.DarkViolet;
                    break;
            }
            return selectedColor;
        }
    }
    /// <summary>
    // 饼形图构造函数
    /// </summary>
    public class Pievalue
    {
        public Pievalue()
        {

        }
        public Pievalue(string MyName, float Myvalue)
        {
            Name = MyName;
            MValue = Myvalue;
        }
        private string name;
        public string Name
        {
            get
            {
                return name;
            }
            set
            {
                name = value;
            }
        }

        private float mvalue;
        public float MValue
        {
            get
            {
                return mvalue;
            }
            set
            {
                mvalue = value;
            }
        }
    }
    /// <summary>
    // 柱形图构造函数
    /// </summary>
    public class BarChartValue
    {
        public BarChartValue()
        {

        }
        public BarChartValue(string MyName, float Myvalue)
        {
            Name = MyName;
            MValue = Myvalue;
        }
        private string name;
        public string Name
        {
            get
            {
                return name;
            }
            set
            {
                name = value;
            }
        }

        private float mvalue;
        public float MValue
        {
            get
            {
                return mvalue;
            }
            set
            {
                mvalue = value;
            }
        }
    }

技术在于交流

[magicbacon]

可以用控件画，免费的有FusionChartsFree，这个有flash动态效果，很漂亮，但可能需要自己用一个用户控件来把它封装起来才比较好用；还有就是dundas chart有一个评估版，也是免费的，只要到网站上注册就可以下载，用起来简单，但是在不绘图的时候会有一个评估版水印，但不影响使用~

lz也可以找找其他绘图控件，很多的~

[evjen]

 /// <summary>
        // 绘制柱形图方法
        /// </summary>

        public static string BarChar(string title, string subTitle, int width, int height, BarChartValue[] Mydata)
        {
            const int SIDE_LENGTH = 400;
            const int CHART_TOP = 75;
            const int CHART_HEIGHT = 200;
            const int CHART_LEFT = 50;
            const int CHART_WIDTH = 300;
　　　　　　float highPoint = 0;
            for (int i = 0; i < Mydata.Length; i++)
            {
                if (highPoint < Convert.ToSingle(Mydata[i].MValue))
                {
                    highPoint = Convert.ToSingle(Mydata[i].MValue);
                }
            }

            Bitmap bm = new Bitmap(width, height);

            Graphics g = Graphics.FromImage(bm);
            g.ScaleTransform((Convert.ToSingle(width)) / SIDE_LENGTH, (Convert.ToSingle(height)) / SIDE_LENGTH);
            g.SmoothingMode = SmoothingMode.Default;
            g.TextRenderingHint = TextRenderingHint.AntiAlias;
            g.Clear(Color.White);
            g.DrawRectangle(Pens.Black, 0, 0, SIDE_LENGTH - 1, SIDE_LENGTH - 1);

            g.DrawString(title, new Font("Tahoma", 14), Brushes.Black, new PointF(5, 5));

            g.DrawString(subTitle, new Font("Tahoma", 12), Brushes.Black, new PointF(7, 35));

            float barWidth = CHART_WIDTH / (Mydata.Length * 2);
            PointF barOrigin = new PointF(CHART_LEFT + (barWidth / 2), 0);
            float barHeight = Mydata.Length;
            for (int i = 0; i < Mydata.Length; i++)
            {
                barHeight = Convert.ToSingle(Mydata[i].MValue) * 200 / highPoint * 1;
                barOrigin.Y = CHART_TOP + CHART_HEIGHT - barHeight;
                g.FillRectangle(new SolidBrush(ChartUtil.GetChartItemColor(i)), barOrigin.X, barOrigin.Y, barWidth + 5, barHeight);



                g.DrawString(Mydata[i].Name, new Font("Tahoma",12), Brushes.Black, new PointF(barOrigin.X - 3, 277));



                barOrigin.X = barOrigin.X + (barWidth * 2);
            }

            g.DrawLine(new Pen(Color.Black, 2), new Point(CHART_LEFT, CHART_TOP-45), 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));

            g.DrawRectangle(new Pen(Color.Black, 1), 50,300, 299, 110);
            g.DrawString("图表说明", new Font("Tahoma", 8, FontStyle.Bold), Brushes.Black, new PointF(5, 290));

            PointF boxOrigin = new PointF(60, 310);
            PointF textOrigin = new PointF(80, 306);
            for (int i = 0; i < Mydata.Length; i++)
            {
                g.FillRectangle(new SolidBrush(ChartUtil.GetChartItemColor(i)), boxOrigin.X, boxOrigin.Y, 20, 10);
                g.DrawRectangle(Pens.Black, boxOrigin.X, boxOrigin.Y, 2, 1);
                g.DrawString(Mydata[i].Name.ToString() + "月份" + " - " + Mydata[i].MValue.ToString("0.00"), new Font("Tahoma", 10), Brushes.Black, textOrigin);
                if (i < 5)
                {
                    boxOrigin.Y += 15;
                    textOrigin.Y += 15;
                }
                else if (i == 5)
                {
                    boxOrigin.X = 208;
                    boxOrigin.Y = 310;
                    textOrigin.X = 230;
                    textOrigin.Y = 306;

                }
                else
                {
                    boxOrigin.Y += 15;
                    textOrigin.Y += 15;
                }

            }

            g.Dispose();
            System.Drawing.Image MyImage = (System.Drawing.Image)bm;
            string TruePath = System.Web.HttpContext.Current.Server.MapPath("~/images");
            string TrueName = DateTime.Now.ToString("yyyyMMddhhmmss") + DateTime.Now.Millisecond;
            MyImage.Save(TruePath + "\\" + TrueName + ".jpg", System.Drawing.Imaging.ImageFormat.Gif);
            return "~/images/" + TrueName + ".jpg";


        }
    }

　　/// <summary>
    ///颜色设置
    /// </summary>
    public class ChartUtil
    {
        public ChartUtil()
        {
        }
        public static Color GetChartItemColor(int itemIndex)
        {
            Color selectedColor;
            switch (itemIndex)
            {
                case 0:
                    selectedColor =Color.YellowGreen;
                    break;
                case 1:
                    selectedColor = Color.Red;
                    break;
                case 2:
                    selectedColor = Color.Yellow;
                    break;
                case 3:
                    selectedColor = Color.PaleVioletRed;
                    break;
                case 4:
                    selectedColor = Color.Aqua;
                    break;
                case 5:
                    selectedColor = Color.Aquamarine;
                    break;
                case 6:
                    selectedColor = Color.Azure;
                    break;
                case 7:
                    selectedColor = Color.SteelBlue;
                    break;
                case 8:
                    selectedColor = Color.RoyalBlue;
                    break;
                case 9:
                    selectedColor = Color.Blue;
                    break;
                case 10:
                    selectedColor = Color.Coral;
                    break;
                case 11:
                    selectedColor = Color.DarkCyan;
                    break;
                case 12:
                    selectedColor = Color.Green;
                    break;
                default:
                    selectedColor = Color.DarkViolet;
                    break;
            }
            return selectedColor;
        }
    }
    /// <summary>
    // 饼形图构造函数
    /// </summary>
    public class Pievalue
    {
        public Pievalue()
        {

        }
        public Pievalue(string MyName, float Myvalue)
        {
            Name = MyName;
            MValue = Myvalue;
        }
        private string name;
        public string Name
        {
            get
            {
                return name;
            }
            set
            {
                name = value;
            }
        }

        private float mvalue;
        public float MValue
        {
            get
            {
                return mvalue;
            }
            set
            {
                mvalue = value;
            }
        }
    }
    /// <summary>
    // 柱形图构造函数
    /// </summary>
    public class BarChartValue
    {
        public BarChartValue()
        {

        }
        public BarChartValue(string MyName, float Myvalue)
        {
            Name = MyName;
            MValue = Myvalue;
        }
        private string name;
        public string Name
        {
            get
            {
                return name;
            }
            set
            {
                name = value;
            }
        }

        private float mvalue;
        public float MValue
        {
            get
            {
                return mvalue;
            }
            set
            {
                mvalue = value;
            }
        }
    }

技术在于交流

[mzx87]

private void CreateImage()
{
..........................

//获取男员工数目
int man = Convert.ToInt32(ds.Tables[0].Rows[0][0].ToString());

//获取女员工数目
int woman = Convert.ToInt32(ds.Tables[0].Rows[0][1].ToString());

int Sum = man +woman ;

//创建画图对象
int width=400,height=450;
Bitmap bitmap = new Bitmap(width,height);
Graphics g = Graphics.FromImage(bitmap);

try
{
//清空背景色
g.Clear(Color.White);
Pen pen1 = new Pen(Color.Red);
Brush brush1 = new SolidBrush(Color.YellowGreen);
Brush brush2 = new SolidBrush(Color.Blue);
Brush brush3 = new SolidBrush(Color.Brown);
Font font1 = new Font("Courier New",16,FontStyle.Bold);
Font font2 = new Font("Courier New", 8);

g.FillRectangle(brush1, 0, 0, width, height); //绘制背景图

g.DrawString("公司男女比例饼形图", font1, brush2, new Point(80, 20)); //书写标题

int piex = 100, piey = 100, piew = 150, pieh = 150;
//男员工在圆中分配的角度
float angle1 = Convert.ToSingle((360 / Convert.ToSingle(Sum)) * Convert.ToSingle(man));
//女员工在圆中分配的角度
float angle2 = Convert.ToSingle((360 / Convert.ToSingle(Sum)) * Convert.ToSingle(woman));

g.FillPie(brush2, piex, piey, piew, pieh, 0, angle1); //绘制男员工所占比例
g.FillPie(brush3, piex, piey, piew, pieh, angle1, angle2); //绘制女员工所占比例

//绘制标识
g.DrawRectangle(pen1, 50, 300, 300, 100); //绘制范围框
g.FillRectangle(brush2, 90, 320, 20, 10); //绘制小矩形
g.DrawString("男员工占公司总人数比例:"+ Convert.ToSingle(man)*100 / Convert.ToSingle(Sum) + "%", font2, brush2, 120, 320);
g.FillRectangle(brush3, 90, 360, 20, 10);
g.DrawString("女员工占公司总人数比例:" + Convert.ToSingle(woman) *100/ Convert.ToSingle(Sum) + "%", font2, brush3, 120, 360);
}
catch(Exception md)
{
Response.Write(md.Message);
}

System.IO.MemoryStream ms = new System.IO.MemoryStream();
bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
Response.ClearContent();
Response.ContentType = "image/Gif";
Response.BinaryWrite(ms.ToArray());
}

[CloneCenter]

可以用 Office Web Component 组件试试看，可以直接支持很多类型的图表。