柱狀圖/ 折線圖 總結

using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Drawing.Imaging;

namespace ChartBuild
{
    public class ChartBuild
    {
        public Bitmap GetChat()
        {

            /**/
            /*自寫編碼*/
            int ImgWidth = 600;         //1.[總寬度]              ***圖寬度  
            int ImgHeight = 300;        //2.[總高度]              ***圖高度       
            int ItemNum = 1;            //3.[項目數量]            ***圖表劃分的塊           
            int ChildNum = 7;           //4.[塊數]                ***大塊中劃分的子項的數量
            float ChildRate = 0.3f;     //5.[各塊總佔空間比率]
            //int ChildSpace=15;        //6.[各塊間的間距]
            int ChartLeft = 80;         //7.[圖表左邊距]          ***圖表距圖的左邊距離
            int ChartRight = 50;        //8.[圖表右邊距]          ***圖表距圖的右邊距離
            int ChartTop = 50;          //9.[圖表頂邊距]          ***圖表距圖頂邊距離
            int ChartBottom = 50;       //10.[圖表底邊距]         ***圖表距圖底邊距離
            //int YMaxValue = 5000;       //11.[縱座標標尺最大值]   ***縱座標標尺的最大值
            int YItemNum = 6;           //12.[縱座標標尺段數]     ***縱座標標尺的段數
            int YTop = 15;              //13.[距縱軸頂端間隔]
            int YStrStart = 35;         //14.[縱座標標尺文字起始X座標]
            int XRight = 15;            //15.[距橫軸右端間隔]
            int XStrStart = 20;         //16.[橫座標標尺文字起始Y座標]

            //[圖表總寬度]=[總寬度]-[圖表左邊距]-[圖表右邊距]-[距橫軸右端間隔]
            int chartwidth = ImgWidth - ChartLeft - ChartRight - XRight;
            //[項目寬度]=[圖表總寬度]/[項目數量]
            int itemwidth = chartwidth / ItemNum;
            //[各塊總佔空間比率的實際寬度]=[項目寬度]*[各塊總佔空間比率]
            int factwidth = Convert.ToInt32(Math.Floor(itemwidth * ChildRate));
            //[各塊矩形寬度]=[各塊總佔空間比率的實際寬度]/[塊數]
            int rectanglewidth = factwidth / ChildNum;
            //[各塊間的間距]=([項目寬度]-[各塊總佔空間比率的實際寬度])/([塊數]+1)
            int childspace = Convert.ToInt32(Math.Floor((Double)((itemwidth - factwidth) / (ChildNum + 1))));

            Graphics objGps;//建立畫板對象
            Bitmap objBitMap = new Bitmap(ImgWidth, ImgHeight);//建立位圖對象
            objGps = Graphics.FromImage(objBitMap);//根據位圖對象建立畫板對象
            objGps.Clear(Color.Silver);//設置畫板對象的背景色

            //在繪畫圖面的指定位置，以指定的字體、指定的顏色繪製指定的字符串。即爲圖表標題
            objGps.DrawString(" 問題統計圖", new Font("黑體", 10), Brushes.Black, new Point(1, 1));

            //***以下代碼是是實現圖右上部
            Point myRec = new Point(500, 30);
            Point myDec = new Point(515, 30);

            //以上是在圖01中爲下面繪製定位
            //objGps.DrawString("單位：千棟", new Font("宋體", 9), Brushes.Black, new Point(500, 12));

            string[] sBiaoshi ={ "未解決問題總數", "新增問題總數" };

            for (int i = 0; i < 2; i++)
            {
                objGps.DrawRectangle(Pens.Black, myRec.X, myRec.Y, 10, 10);
                //繪製小方塊

                objGps.FillRectangle(new SolidBrush(GetColor(i)), myRec.X, myRec.Y, 10, 10);
                //填充小方塊

                objGps.DrawString(sBiaoshi[i].ToString(), new Font("宋體", 9), Brushes.Black, myDec);
                //繪製小方塊右邊的文字

                myRec.Y += 15;
                myDec.Y += 15;
            }

            //數據數組
            int[] arrValues ={ 0, 0, 0, 0, 0, 0 };

            //處理顯示數據，進行圖表數值對應
            arrValues[0] = Convert.ToInt32(Math.Floor((Double)((ImgHeight - ChartBottom - ChartTop - YTop) / YItemNum * 2)));
            arrValues[1] = Convert.ToInt32(Math.Floor((Double)((ImgHeight - ChartBottom - ChartTop - YTop) / YItemNum * 1.5)));
            arrValues[2] = Convert.ToInt32(Math.Floor((Double)((ImgHeight - ChartBottom - ChartTop - YTop) / YItemNum * 2.5)));
            arrValues[3] = Convert.ToInt32(Math.Floor((Double)((ImgHeight - ChartBottom - ChartTop - YTop) / YItemNum * 2)));
            arrValues[4] = Convert.ToInt32(Math.Floor((Double)((ImgHeight - ChartBottom - ChartTop - YTop) / YItemNum * 3.5)));
            arrValues[5] = Convert.ToInt32(Math.Floor((Double)((ImgHeight - ChartBottom - ChartTop - YTop) / YItemNum * 2)));
            int[] arrValuesNow ={ 20, 28, 30, 20, 40, 10 };

            //縱座標標碼
            string[] arrValueNames = { "2", "4", "6", "8", "10", "12" };

            string[] arrItemNames ={ "注約", "移行A", "移行B", "GLADOFFICE", "AAA", "DDDD" };

            //得出矩形寬度，和畫圖X軸位置

            //[項目寬度]=[總寬度]/[項目數量]
            //======[各塊總佔空間比率]=（[各塊矩形寬度]+[各塊間的間距]）/[項目寬度]
            //[各塊總佔空間比率的實際寬度]=[項目寬度]*[各塊總佔空間比率]
            //[各塊矩形寬度]=（[各塊總佔空間比率的實際寬度]-[各塊間的間距]*（[塊數]））/[塊數]
            //[一邊空餘空間寬度]=（[項目寬度]-[各塊所佔空間比率的總寬度]）/2 

            System.Drawing.Point[] pi = new Point[arrValues.Length];    //定義折線點的對象數組
            System.Drawing.Point[] pit = new Point[3];    //定義座標三角點的對象數組
            System.Drawing.Pen pe = new Pen(new SolidBrush(GetColor(7)), 1f);    //定義畫直線的對象
            //畫縱軸
            objGps.DrawLine(pe, new Point(ChartLeft, ImgHeight - ChartBottom), new Point(ChartLeft, ChartTop + YTop));
            objGps.DrawLine(pe, new Point(ImgWidth - ChartRight, ImgHeight - ChartBottom), new Point(ImgWidth - ChartRight, ChartTop + YTop));

            ////畫縱軸終點箭頭
            //pit[0].X = ImgWidth - ChartRight;    //確定三角形三點的位置
            //pit[0].Y = ImgHeight - ChartBottom - 4;
            //pit[1].X = ImgWidth - ChartRight;
            //pit[1].Y = ImgHeight - ChartBottom + 4;
            //pit[2].X = ImgWidth - ChartRight + 10;
            //pit[2].Y = ImgHeight - ChartBottom;
            //objGps.FillPolygon(new SolidBrush(GetColor(7)), pit);

            //畫縱軸標尺和標尺描述
            for (int i = 1; i <= YItemNum; i++)
            {
                //畫標尺
                //objGps.DrawLine(pe, new PointF(ChartLeft, ImgHeight - ChartBottom - (ImgHeight - ChartBottom - ChartTop - YTop) / YItemNum * i), new PointF(ChartLeft - 5, ImgHeight - ChartBottom - (ImgHeight - ChartBottom - ChartTop - YTop) / YItemNum * i));
                objGps.DrawLine(pe, new Point(ChartLeft, ImgHeight - ChartBottom - (ImgHeight - ChartBottom - ChartTop - YTop) / YItemNum * i), new Point(ImgWidth - ChartRight, ImgHeight - ChartBottom - (ImgHeight - ChartBottom - ChartTop - YTop) / YItemNum * i));
                //畫描述
                objGps.DrawString(arrValueNames[i - 1].ToString(), new Font("宋體", 10), Brushes.Black, new Point(YStrStart, ImgHeight - ChartBottom - (ImgHeight - ChartBottom - ChartTop - YTop) / YItemNum * i - 5));
            }
            //畫橫軸
            objGps.DrawLine(pe, new Point(ChartLeft, ImgHeight - ChartBottom), new Point(ImgWidth - ChartRight, ImgHeight - ChartBottom));

            ////畫橫軸終點箭頭
            //pit[0].X = ChartLeft - 4;    //確定三角形三點的位置
            //pit[0].Y = ChartTop;
            //pit[1].X = ChartLeft + 4;
            //pit[1].Y = ChartTop;
            //pit[2].X = ChartLeft;
            //pit[2].Y = ChartTop - 10;
            //objGps.FillPolygon(new SolidBrush(GetColor(7)), pit);

            //畫橫軸標尺和標尺描述
            for (int i = 1; i <= arrValues.Length; i++)
            {
                //objGps.DrawLine(pe, new PointF(ChartLeft + itemwidth * i, ImgHeight - ChartBottom), new PointF(ChartLeft + itemwidth * i, ImgHeight - ChartBottom + 5));

                objGps.DrawString((arrItemNames[i - 1].ToString()), (new Font("宋體", 9)), (Brushes.Black), new Point(ChartLeft + childspace + itemwidth * (i - 1) / 7, ImgHeight - ChartBottom + XStrStart));
            }

            for (int j = 0; j < arrValues.Length; j++)//畫矩形圖
            {
                objGps.FillRectangle(new SolidBrush(GetColor(4)), (j * (childspace + rectanglewidth)) + childspace + ChartLeft, ImgHeight - ChartBottom - arrValues[j], rectanglewidth, arrValues[j]);
                objGps.FillRectangle(new SolidBrush(GetColor(3)), (j * (childspace + rectanglewidth)) + childspace + ChartLeft + rectanglewidth, ImgHeight - ChartBottom - arrValuesNow[j], rectanglewidth, arrValuesNow[j]);
                objGps.DrawRectangle(Pens.Black, (j * (childspace + rectanglewidth)) + childspace + ChartLeft, ImgHeight - ChartBottom - arrValues[j], rectanglewidth, arrValues[j]);
                objGps.DrawRectangle(Pens.Black, (j * (childspace + rectanglewidth)) + childspace + ChartLeft + rectanglewidth, ImgHeight - ChartBottom - arrValuesNow[j], rectanglewidth, arrValuesNow[j]);
                ////折線圖
                //pi[j].X = (j * (childspace + rectanglewidth)) + childspace + ChartLeft;
                //pi[j].Y = ImgHeight - ChartBottom - arrValues[j];
                //pe.SetLineCap(System.Drawing.Drawing2D.LineCap.RoundAnchor, System.Drawing.Drawing2D.LineCap.RoundAnchor, System.Drawing.Drawing2D.DashCap.Round);
                //if (j > 0)
                //{
                //    objGps.DrawLine(pe, pi[j - 1], pi[j]);
                //}
            }
            return  objBitMap;//該位圖對象以"GIF"格式輸出
        }

        /**/
        /// <param name="itemIndex">系統定義的顏色，有效值0到7，分別爲（Blue，Yellow，Red，Orange，Purple，Brown，Pink，Black）</param>
        /// <returns></returns>
        public static Color GetColor(int itemIndex)
        {
            Color objColor = new Color();
            switch (itemIndex)
            {
                case 0:
                    objColor = Color.Blue;
                    break;
                case 1:
                    objColor = Color.Red;
                    break;
                case 2:
                    objColor = Color.Yellow;
                    break;
                case 3:
                    objColor = Color.Orange;
                    break;
                case 4:
                    objColor = Color.Purple;
                    break;
                case 5:
                    objColor = Color.Brown;
                    break;
                case 6:
                    objColor = Color.Pink;
                    break;
                default:
                    objColor = Color.Black;
                    break;
            }

            return objColor;
        }

        /**/
        /// <param name="red">自定義顏色紅色分量值，有效值0到255</param>
        /// <param name="green">自定義顏色綠色分量值，有效值0到255</param>
        /// <param name="blue">自定義顏色藍色分量值，有效值0到255</param>
        /// <returns></returns>
        public static Color GetColor(int red, int green, int blue)
        {
            Color objColor = new Color();
            objColor = Color.FromArgb(red, green, blue);
            return objColor;
        }
    }
}