C#繪制曲線圖的辦法。本站提示廣大學習愛好者:(C#繪制曲線圖的辦法)文章只能為提供參考,不一定能成為您想要的結果。以下是C#繪制曲線圖的辦法正文
本文實例講述了C#繪制曲線圖的辦法。分享給年夜家供年夜家參考。詳細以下:
1. 曲線圖後果:
2. C#代碼:
/// <summary> /// 主動依據參數調劑圖象年夜小 /// </summary> public void Fit() { //盤算字體間隔 intFontSpace = FontSize + 5; //盤算圖象邊距 float fltSpace = Math.Min(Width / 6, Height / 6); XSpace = fltSpace; YSpace = fltSpace; //盤算X軸刻度寬度 XSlice = (Width - 2 * XSpace) / (Keys.Length - 1); //盤算Y軸刻度寬度和Y軸刻度開端值 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; }
3. 數據減少一個級其余後果:
4. 完全代碼 DrawingCurve.cs:
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 類供給將對象繪制到顯示裝備的辦法 private Bitmap objBitmap; //位圖對象 private float fltWidth = 480; //圖象寬度 private float fltHeight = 248; //圖象高度 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軸刻度開端值 private float fltTension = 0.5f; private string strTitle = "曲線圖"; //題目 private string strXAxisText = "月份"; //X軸解釋文字 private string strYAxisText = "萬元"; //Y軸解釋文字 private string[] strsKeys = new string[] { "一月", "二月", "三月", "四月", "蒲月", "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; //配景色 private Color clrTextColor = Color.Black; //文字色彩 private Color clrBorderColor = Color.Black; //全體邊框色彩 private Color clrAxisColor = Color.Black; //軸線色彩 private Color clrAxisTextColor = Color.Black; //軸解釋文字色彩 private Color clrSliceTextColor = Color.Black; //刻度文字色彩 private Color clrSliceColor = Color.Black; //刻度色彩 private Color[] clrsCurveColors = new Color[] { Color.Red, Color.Blue }; //曲線色彩 private float fltXSpace = 100f; //圖象閣下間隔邊沿間隔 private float fltYSpace = 100f; //圖象高低間隔邊沿間隔 private int intFontSize = 9; //字體年夜小號數 private float fltXRotateAngle = 30f; //X軸文字扭轉角度 private float fltYRotateAngle = 0f; //Y軸文字扭轉角度 private int intCurveSize = 2; //曲線線條年夜小 private int intFontSpace = 0; //intFontSpace 是字體年夜小和間隔調劑出來的一個比擬合適的數字 #region 公共屬性 /// <summary> /// 圖象的寬度 /// </summary> public float Width { set { if (value < 100) { fltWidth = 100; } else { fltWidth = value; } } get { if (fltWidth <= 100) { return 100; } else { return fltWidth; } } } /// <summary> /// 圖象的高度 /// </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軸刻度開端值 /// </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> /// 題目 /// </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> /// 配景色 /// </summary> public Color BgColor { set { clrBgColor = value; } get { return clrBgColor; } } /// <summary> /// 文字色彩 /// </summary> public Color TextColor { set { clrTextColor = value; } get { return clrTextColor; } } /// <summary> /// 全體邊框色彩 /// </summary> public Color BorderColor { set { clrBorderColor = value; } get { return clrBorderColor; } } /// <summary> /// 軸線色彩 /// </summary> public Color AxisColor { set { clrAxisColor = value; } get { return clrAxisColor; } } /// <summary> /// X軸解釋文字 /// </summary> public string XAxisText { set { strXAxisText = value; } get { return strXAxisText; } } /// <summary> /// Y軸解釋文字 /// </summary> public string YAxisText { set { strYAxisText = value; } get { return strYAxisText; } } /// <summary> /// 軸解釋文字色彩 /// </summary> public Color AxisTextColor { set { clrAxisTextColor = value; } get { return clrAxisTextColor; } } /// <summary> /// 刻度文字色彩 /// </summary> public Color SliceTextColor { set { clrSliceTextColor = value; } get { return clrSliceTextColor; } } /// <summary> /// 刻度色彩 /// </summary> public Color SliceColor { set { clrSliceColor = value; } get { return clrSliceColor; } } /// <summary> /// 曲線色彩 /// </summary> public Color[] CurveColors { set { clrsCurveColors = value; } get { return clrsCurveColors; } } /// <summary> /// X軸文字扭轉角度 /// </summary> public float XRotateAngle { get { return fltXRotateAngle; } set { fltXRotateAngle = value; } } /// <summary> /// Y軸文字扭轉角度 /// </summary> public float YRotateAngle { get { return fltYRotateAngle; } set { fltYRotateAngle = value; } } /// <summary> /// 圖象閣下間隔邊沿間隔 /// </summary> public float XSpace { get { return fltXSpace; } set { fltXSpace = value; } } /// <summary> /// 圖象高低間隔邊沿間隔 /// </summary> public float YSpace { get { return fltYSpace; } set { fltYSpace = value; } } /// <summary> /// 字體年夜小號數 /// </summary> public int FontSize { get { return intFontSize; } set { intFontSize = value; } } /// <summary> /// 曲線線條年夜小 /// </summary> public int CurveSize { get { return intCurveSize; } set { intCurveSize = value; } } #endregion /// <summary> /// 主動依據參數調劑圖象年夜小 /// </summary> public void Fit() { //盤算字體間隔 intFontSpace = FontSize + 5; //盤算圖象邊距 float fltSpace = Math.Min(Width / 6, Height / 6); XSpace = fltSpace; YSpace = fltSpace; //盤算X軸刻度寬度 XSlice = (Width - 2 * XSpace) / (Keys.Length - 1); //盤算Y軸刻度寬度和Y軸刻度開端值 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> /// 生成圖象並前往bmp圖象對象 /// </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("產生毛病,Values的長度必需是Keys的整數倍!", new Font("宋體", FontSize + 5), new SolidBrush(TextColor), new Point((int)XSpace, (int)(Height / 2))); } return objBitmap; } /// <summary> /// 初始化和填充圖象區域,畫出邊框,初始題目 /// </summary> private void InitializeGraph() { //依據給定的高度和寬度創立一個位圖圖象 objBitmap = new Bitmap((int)Width, (int)Height); //從指定的 objBitmap 對象創立 objGraphics 對象 (即在objBitmap對象中繪圖) objGraphics = Graphics.FromImage(objBitmap); //依據給定色彩(LightGray)填充圖象的矩形區域 (配景) 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,留意圖象的原始X軸和Y軸盤算是以左上角為原點,向右和向下盤算的 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); //初始化軸線解釋文字 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); //初始化題目 CreateTitle(ref objGraphics); } /// <summary> /// 初始化軸線解釋文字 /// </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; //字體高低間隔 } } /// <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,並乘以50,以10為單元畫刻度線。 float fltSliceHeight = XSlice / 10; //刻度線的高度 objGraphics.TranslateTransform(fltX1, fltY1); //平移圖象(原點) objGraphics.RotateTransform(XRotateAngle, MatrixOrder.Prepend); //扭轉圖象 objGraphics.DrawString(Keys[0].ToString(), new Font("宋體", FontSize), new SolidBrush(SliceTextColor), 0, 0); objGraphics.ResetTransform(); //重置圖象 for (int i = 0; i <= iWidth; i += 10) //以10為單元 { Scale = i * XSlice / 50;//即(i / 10) * (XSlice / 5),將每一個刻度分五部門畫,但由於i以10為單元,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); //這裡顯示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 { //跨越規模,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,並乘以50,以10為單元畫刻度線。 float fltSliceWidth = YSlice / 10; //刻度線的寬度 string strSliceText = string.Empty; objGraphics.TranslateTransform(XSpace - intFontSpace * YSliceBegin.ToString().Length, Height - YSpace); //平移圖象(原點) objGraphics.RotateTransform(YRotateAngle, MatrixOrder.Prepend); //扭轉圖象 objGraphics.DrawString(YSliceBegin.ToString(), new Font("宋體", FontSize), new SolidBrush(SliceTextColor), 0, 0); objGraphics.ResetTransform(); //重置圖象 for (int i = 0; i < iHeight; i += 10) { Scale = i * YSlice / 50; //即(i / 10) * (YSlice / 5),將每一個刻度分五部門畫,但由於i以10為單元,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); //這裡顯示Y軸刻度 strSliceText = Convert.ToString(YSliceValue * iSliceCount + YSliceBegin); objGraphics.TranslateTransform(XSpace - intFontSize * strSliceText.Length, fltY1 - Scale); //平移圖象(原點) objGraphics.RotateTransform(YRotateAngle, MatrixOrder.Prepend); //扭轉圖象 objGraphics.DrawString(strSliceText, new Font("宋體", FontSize), new SolidBrush(SliceTextColor), 0, 0); objGraphics.ResetTransform(); //重置圖象 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> /// 初始化題目 /// </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))); } } }
願望本文所述對年夜家的C#法式設計有所贊助。