/// <summary>/// 自動根據參數調整圖像大小/// </summary>public void Fit(){ //計算字體距離 intFontSpace = FontSize + 5; //計算圖像邊距 float fltSpace = Math.Min(Width / 6, Height / 6); XSpace = fltSpace; YSpace = fltSpace; //計算X軸刻度寬度 XSlice = (Width - 2 * XSpace) / (Keys.Length - 1); //計算Y軸刻度寬度和Y軸刻度開始值 float fltMinValue = 0; float fltMaxValue = 0; for (int i = 0; i < Values.Length; i++) {  if (Values[i] < fltMinValue)  {  fltMinValue = Values[i];  }  else if (Values[i] > fltMaxValue)  {  fltMaxValue = Values[i];  } } if (YSliceBegin > fltMinValue) {  YSliceBegin = fltMinValue; } int intYSliceCount = (int)(fltMaxValue / YSliceValue); if (fltMaxValue % YSliceValue != 0) {  intYSliceCount++; } YSlice = (Height - 2 * YSpace) / intYSliceCount;}

using System;using System.Collections.Generic;using System.Text;using System.Drawing;using System.Data;using System.Drawing.Drawing2D;namespace SarchPMS.Business.Draw{ public class DrawingCurve : DrawingChart {  /// <summary>  /// 畫曲線圖  /// </summary>  /// <param name="dsParameter"></param>  /// <returns></returns>  public override Bitmap DrawImage(DataSet dsParameter)  {   Curve2D cuv2D = new Curve2D();   cuv2D.Fit();   return cuv2D.CreateImage();  } } public class Curve2D {  private Graphics objGraphics; //Graphics 類提供將對象繪制到顯示設備的方法  private Bitmap objBitmap; //位圖對象  private float fltWidth = 480; //圖像寬度  private float fltHeight = 248; //圖像高度  private float fltXSlice = 50; //X軸刻度寬度  private float fltYSlice = 50; //Y軸刻度寬度  private float fltYSliceValue = 20; //Y軸刻度的數值寬度  private float fltYSliceBegin = 0; //Y軸刻度開始值  private float fltTension = 0.5f;  private string strTitle = "曲線圖"; //標題  private string strXAxisText = "月份"; //X軸說明文字  private string strYAxisText = "萬元"; //Y軸說明文字  private string[] strsKeys = new string[] { "一月", "二月", "三月", "四月", "五月", "六月", "七月", "八月", "九月", "十月", "十一月", "十二月" }; //鍵  private float[] fltsValues = new float[] { 20.0f, 30.0f, 50.0f, 55.4f, 21.6f, 12.8f, 99.5f, 36.4f, 78.2f, 56.4f, 45.8f, 66.5f, 99.5f, 36.4f, 78.2f, 56.4f, 45.8f, 66.5f, 20.0f, 30.0f, 50.0f, 55.4f, 21.6f, 12.8f }; //值  private Color clrBgColor = Color.Snow; //背景色  private Color clrTextColor = Color.Black; //文字顏色  private Color clrBorderColor = Color.Black; //整體邊框顏色  private Color clrAxisColor = Color.Black; //軸線顏色  private Color clrAxisTextColor = Color.Black; //軸說明文字顏色  private Color clrSliceTextColor = Color.Black; //刻度文字顏色  private Color clrSliceColor = Color.Black; //刻度顏色  private Color[] clrsCurveColors = new Color[] { Color.Red, Color.Blue }; //曲線顏色  private float fltXSpace = 100f; //圖像左右距離邊緣距離  private float fltYSpace = 100f; //圖像上下距離邊緣距離  private int intFontSize = 9; //字體大小號數  private float fltXRotateAngle = 30f; //X軸文字旋轉角度  private float fltYRotateAngle = 0f; //Y軸文字旋轉角度  private int intCurveSize = 2; //曲線線條大小  private int intFontSpace = 0; //intFontSpace 是字體大小和距離調整出來的一個比較適合的數字  #region 公共屬性  /// <summary>  /// 圖像的寬度  /// </summary>  public float Width  {   set   {    if (value < 100)    {     fltWidth = 100;    }    else    {     fltWidth = value;    }   }   get   {    if (fltWidth <= 100)    {     return 100;    }    else    {     return fltWidth;    }   }  }  /// <summary>  /// 圖像的高度  /// </summary>  public float Height  {   set   {    if (value < 100)    {     fltHeight = 100;    }    else    {     fltHeight = value;    }   }   get   {    if (fltHeight <= 100)    {     return 100;    }    else    {     return fltHeight;    }   }  }  /// <summary>  /// X軸刻度寬度  /// </summary>  public float XSlice  {   set { fltXSlice = value; }   get { return fltXSlice; }  }  /// <summary>  /// Y軸刻度寬度  /// </summary>  public float YSlice  {   set { fltYSlice = value; }   get { return fltYSlice; }  }  /// <summary>  /// Y軸刻度的數值寬度  /// </summary>  public float YSliceValue  {   set { fltYSliceValue = value; }   get { return fltYSliceValue; }  }  /// <summary>  /// Y軸刻度開始值  /// </summary>  public float YSliceBegin  {   set { fltYSliceBegin = value; }   get { return fltYSliceBegin; }  }  /// <summary>  /// 張力系數  /// </summary>  public float Tension  {   set   {    if (value < 0.0f && value > 1.0f)    {     fltTension = 0.5f;    }    else    {     fltTension = value;    }   }   get   {    return fltTension;   }  }  /// <summary>  /// 標題  /// </summary>  public string Title  {   set { strTitle = value; }   get { return strTitle; }  }  /// <summary>  /// 鍵，X軸數據  /// </summary>  public string[] Keys  {   set { strsKeys = value; }   get { return strsKeys; }  }  /// <summary>  /// 值，Y軸數據  /// </summary>  public float[] Values  {   set { fltsValues = value; }   get { return fltsValues; }  }  /// <summary>  /// 背景色  /// </summary>  public Color BgColor  {   set { clrBgColor = value; }   get { return clrBgColor; }  }  /// <summary>  /// 文字顏色  /// </summary>  public Color TextColor  {   set { clrTextColor = value; }   get { return clrTextColor; }  }  /// <summary>  /// 整體邊框顏色  /// </summary>  public Color BorderColor  {   set { clrBorderColor = value; }   get { return clrBorderColor; }  }  /// <summary>  /// 軸線顏色  /// </summary>  public Color AxisColor  {   set { clrAxisColor = value; }   get { return clrAxisColor; }  }  /// <summary>  /// X軸說明文字  /// </summary>  public string XAxisText  {   set { strXAxisText = value; }   get { return strXAxisText; }  }  /// <summary>  /// Y軸說明文字  /// </summary>  public string YAxisText  {   set { strYAxisText = value; }   get { return strYAxisText; }  }  /// <summary>  /// 軸說明文字顏色  /// </summary>  public Color AxisTextColor  {   set { clrAxisTextColor = value; }   get { return clrAxisTextColor; }  }  /// <summary>  /// 刻度文字顏色  /// </summary>  public Color SliceTextColor  {   set { clrSliceTextColor = value; }   get { return clrSliceTextColor; }  }  /// <summary>  /// 刻度顏色  /// </summary>  public Color SliceColor  {   set { clrSliceColor = value; }   get { return clrSliceColor; }  }  /// <summary>  /// 曲線顏色  /// </summary>  public Color[] CurveColors  {   set { clrsCurveColors = value; }   get { return clrsCurveColors; }  }  /// <summary>  /// X軸文字旋轉角度  /// </summary>  public float XRotateAngle  {   get { return fltXRotateAngle; }   set { fltXRotateAngle = value; }  }  /// <summary>  /// Y軸文字旋轉角度  /// </summary>  public float YRotateAngle  {   get { return fltYRotateAngle; }   set { fltYRotateAngle = value; }  }  /// <summary>  /// 圖像左右距離邊緣距離  /// </summary>  public float XSpace  {   get { return fltXSpace; }   set { fltXSpace = value; }  }  /// <summary>  /// 圖像上下距離邊緣距離  /// </summary>  public float YSpace  {   get { return fltYSpace; }   set { fltYSpace = value; }  }  /// <summary>  /// 字體大小號數  /// </summary>  public int FontSize  {   get { return intFontSize; }   set { intFontSize = value; }  }  /// <summary>  /// 曲線線條大小  /// </summary>  public int CurveSize  {   get { return intCurveSize; }   set { intCurveSize = value; }  }  #endregion  /// <summary>  /// 自動根據參數調整圖像大小  /// </summary>  public void Fit()  {   //計算字體距離   intFontSpace = FontSize + 5;   //計算圖像邊距   float fltSpace = Math.Min(Width / 6, Height / 6);   XSpace = fltSpace;   YSpace = fltSpace;   //計算X軸刻度寬度   XSlice = (Width - 2 * XSpace) / (Keys.Length - 1);   //計算Y軸刻度寬度和Y軸刻度開始值   float fltMinValue = 0;   float fltMaxValue = 0;   for (int i = 0; i < Values.Length; i++)   {    if (Values[i] < fltMinValue)    {     fltMinValue = Values[i];    }    else if (Values[i] > fltMaxValue)    {     fltMaxValue = Values[i];    }   }   if (YSliceBegin > fltMinValue)   {    YSliceBegin = fltMinValue;   }   int intYSliceCount = (int)(fltMaxValue / YSliceValue);   if (fltMaxValue % YSliceValue != 0)   {    intYSliceCount++;   }   YSlice = (Height - 2 * YSpace) / intYSliceCount;  }  /// <summary>  /// 生成圖像并返回bmp圖像對象  /// </summary>  /// <returns></returns>  public Bitmap CreateImage()  {   InitializeGraph();   int intKeysCount = Keys.Length;   int intValuesCount = Values.Length;   if (intValuesCount % intKeysCount == 0)   {    int intCurvesCount = intValuesCount / intKeysCount;    for (int i = 0; i < intCurvesCount; i++)    {     float[] fltCurrentValues = new float[intKeysCount];     for (int j = 0; j < intKeysCount; j++)     {      fltCurrentValues[j] = Values[i * intKeysCount + j];     }     DrawContent(ref objGraphics, fltCurrentValues, clrsCurveColors[i]);    }   }   else   {    objGraphics.DrawString("發生錯誤，Values的長度必須是Keys的整數倍!", new Font("宋體", FontSize + 5), new SolidBrush(TextColor), new Point((int)XSpace, (int)(Height / 2)));   }   return objBitmap;  }  /// <summary>  /// 初始化和填充圖像區域，畫出邊框，初始標題  /// </summary>  private void InitializeGraph()  {   //根據給定的高度和寬度創建一個位圖圖像   objBitmap = new Bitmap((int)Width, (int)Height);   //從指定的 objBitmap 對象創建 objGraphics 對象 (即在objBitmap對象中畫圖)   objGraphics = Graphics.FromImage(objBitmap);   //根據給定顏色(LightGray)填充圖像的矩形區域 (背景)   objGraphics.DrawRectangle(new Pen(BorderColor, 1), 0, 0, Width - 1, Height - 1); //畫邊框   objGraphics.FillRectangle(new SolidBrush(BgColor), 1, 1, Width - 2, Height - 2); //填充邊框   //畫X軸,注意圖像的原始X軸和Y軸計算是以左上角為原點，向右和向下計算的   float fltX1 = XSpace;   float fltY1 = Height - YSpace;   float fltX2 = Width - XSpace + XSlice / 2;   float fltY2 = fltY1;   objGraphics.DrawLine(new Pen(new SolidBrush(AxisColor), 1), fltX1, fltY1, fltX2, fltY2);   //畫Y軸   fltX1 = XSpace;   fltY1 = Height - YSpace;   fltX2 = XSpace;   fltY2 = YSpace - YSlice / 2;   objGraphics.DrawLine(new Pen(new SolidBrush(AxisColor), 1), fltX1, fltY1, fltX2, fltY2);   //初始化軸線說明文字   SetAxisText(ref objGraphics);   //初始化X軸上的刻度和文字   SetXAxis(ref objGraphics);   //初始化Y軸上的刻度和文字   SetYAxis(ref objGraphics);   //初始化標題   CreateTitle(ref objGraphics);  }  /// <summary>  /// 初始化軸線說明文字  /// </summary>  /// <param name="objGraphics"></param>  private void SetAxisText(ref Graphics objGraphics)  {   float fltX = Width - XSpace + XSlice / 2 - (XAxisText.Length - 1) * intFontSpace;   float fltY = Height - YSpace - intFontSpace;   objGraphics.DrawString(XAxisText, new Font("宋體", FontSize), new SolidBrush(AxisTextColor), fltX, fltY);   fltX = XSpace + 5;   fltY = YSpace - YSlice / 2 - intFontSpace;   for (int i = 0; i < YAxisText.Length; i++)   {    objGraphics.DrawString(YAxisText[i].ToString(), new Font("宋體", FontSize), new SolidBrush(AxisTextColor), fltX, fltY);    fltY += intFontSpace; //字體上下距離   }  }  /// <summary>  /// 初始化X軸上的刻度和文字  /// </summary>  /// <param name="objGraphics"></param>  private void SetXAxis(ref Graphics objGraphics)  {   float fltX1 = XSpace;   float fltY1 = Height - YSpace;   float fltX2 = XSpace;   float fltY2 = Height - YSpace;   int iCount = 0;   int iSliceCount = 1;   float Scale = 0;   float iWidth = ((Width - 2 * XSpace) / XSlice) * 50; //將要畫刻度的長度分段，并乘以50，以10為單位畫刻度線。   float fltSliceHeight = XSlice / 10; //刻度線的高度   objGraphics.TranslateTransform(fltX1, fltY1); //平移圖像(原點)   objGraphics.RotateTransform(XRotateAngle, MatrixOrder.Prepend); //旋轉圖像   objGraphics.DrawString(Keys[0].ToString(), new Font("宋體", FontSize), new SolidBrush(SliceTextColor), 0, 0);   objGraphics.ResetTransform(); //重置圖像   for (int i = 0; i <= iWidth; i += 10) //以10為單位   {    Scale = i * XSlice / 50;//即(i / 10) * (XSlice / 5)，將每個刻度分五部分畫，但因為i以10為單位，得除以10    if (iCount == 5)    {     objGraphics.DrawLine(new Pen(new SolidBrush(AxisColor)), fltX1 + Scale, fltY1 + fltSliceHeight * 1.5f, fltX2 + Scale, fltY2 - fltSliceHeight * 1.5f);     //畫網格虛線     Pen penDashed = new Pen(new SolidBrush(AxisColor));     penDashed.DashStyle = DashStyle.Dash;     objGraphics.DrawLine(penDashed, fltX1 + Scale, fltY1, fltX2 + Scale, YSpace - YSlice / 2);     //這里顯示X軸刻度     if (iSliceCount <= Keys.Length - 1)     {      objGraphics.TranslateTransform(fltX1 + Scale, fltY1);      objGraphics.RotateTransform(XRotateAngle, MatrixOrder.Prepend);      objGraphics.DrawString(Keys[iSliceCount].ToString(), new Font("宋體", FontSize), new SolidBrush(SliceTextColor), 0, 0);      objGraphics.ResetTransform();     }     else     {      //超過范圍，不畫任何刻度文字     }     iCount = 0;     iSliceCount++;     if (fltX1 + Scale > Width - XSpace)     {      break;     }    }    else    {     objGraphics.DrawLine(new Pen(new SolidBrush(SliceColor)), fltX1 + Scale, fltY1 + fltSliceHeight, fltX2 + Scale, fltY2 - fltSliceHeight);    }    iCount++;   }  }  /// <summary>  /// 初始化Y軸上的刻度和文字  /// </summary>  /// <param name="objGraphics"></param>  private void SetYAxis(ref Graphics objGraphics)  {   float fltX1 = XSpace;   float fltY1 = Height - YSpace;   float fltX2 = XSpace;   float fltY2 = Height - YSpace;   int iCount = 0;   float Scale = 0;   int iSliceCount = 1;   float iHeight = ((Height - 2 * YSpace) / YSlice) * 50; //將要畫刻度的長度分段，并乘以50，以10為單位畫刻度線。   float fltSliceWidth = YSlice / 10; //刻度線的寬度   string strSliceText = string.Empty;   objGraphics.TranslateTransform(XSpace - intFontSpace * YSliceBegin.ToString().Length, Height - YSpace); //平移圖像(原點)   objGraphics.RotateTransform(YRotateAngle, MatrixOrder.Prepend); //旋轉圖像   objGraphics.DrawString(YSliceBegin.ToString(), new Font("宋體", FontSize), new SolidBrush(SliceTextColor), 0, 0);   objGraphics.ResetTransform(); //重置圖像   for (int i = 0; i < iHeight; i += 10)   {    Scale = i * YSlice / 50; //即(i / 10) * (YSlice / 5)，將每個刻度分五部分畫，但因為i以10為單位，得除以10    if (iCount == 5)    {     objGraphics.DrawLine(new Pen(new SolidBrush(AxisColor)), fltX1 - fltSliceWidth * 1.5f, fltY1 - Scale, fltX2 + fltSliceWidth * 1.5f, fltY2 - Scale);     //畫網格虛線     Pen penDashed = new Pen(new SolidBrush(AxisColor));     penDashed.DashStyle = DashStyle.Dash;     objGraphics.DrawLine(penDashed, XSpace, fltY1 - Scale, Width - XSpace + XSlice / 2, fltY2 - Scale);     //這里顯示Y軸刻度     strSliceText = Convert.ToString(YSliceValue * iSliceCount + YSliceBegin);     objGraphics.TranslateTransform(XSpace - intFontSize * strSliceText.Length, fltY1 - Scale); //平移圖像(原點)     objGraphics.RotateTransform(YRotateAngle, MatrixOrder.Prepend); //旋轉圖像     objGraphics.DrawString(strSliceText, new Font("宋體", FontSize), new SolidBrush(SliceTextColor), 0, 0);     objGraphics.ResetTransform(); //重置圖像     iCount = 0;     iSliceCount++;    }    else    {     objGraphics.DrawLine(new Pen(new SolidBrush(SliceColor)), fltX1 - fltSliceWidth, fltY1 - Scale, fltX2 + fltSliceWidth, fltY2 - Scale);    }    iCount++;   }  }  /// <summary>  /// 畫曲線  /// </summary>  /// <param name="objGraphics"></param>  private void DrawContent(ref Graphics objGraphics, float[] fltCurrentValues, Color clrCurrentColor)  {   Pen CurvePen = new Pen(clrCurrentColor, CurveSize);   PointF[] CurvePointF = new PointF[Keys.Length];   float keys = 0;   float values = 0;   for (int i = 0; i < Keys.Length; i++)   {    keys = XSlice * i + XSpace;    values = (Height - YSpace) + YSliceBegin - YSlice * (fltCurrentValues[i] / YSliceValue);    CurvePointF[i] = new PointF(keys, values);   }   objGraphics.DrawCurve(CurvePen, CurvePointF, Tension);  }  /// <summary>  /// 初始化標題  /// </summary>  /// <param name="objGraphics"></param>  private void CreateTitle(ref Graphics objGraphics)  {   objGraphics.DrawString(Title, new Font("宋體", FontSize), new SolidBrush(TextColor), new Point((int)(Width - XSpace) - intFontSize * Title.Length, (int)(YSpace - YSlice / 2 - intFontSpace)));  } }}