C#画K线实现画K线和截图保存

string begindate = null;
string curdate = null;
string overdate = null;
int half = 0;
string gpname = null;
int width = 1050;//K线图矩形宽
int height = 400;//K线图矩形高
int leftX = 40;//k线图矩形原始坐标X
int topY = 80;//k线图矩形原始坐标Y
//按钮加载K线
private void button1_Click(object sender, EventArgs e)
{
if (this.comboBox1.Text == “热点”)
{
gpname = “zhy” + this.textBox1.Text.Trim();
}
else
{
gpname =this.textBox1.Text.Trim();
}
if (gpname != “zhy”)
{
int count = 10;
half = count;
//string jintian = DateTime.Now.ToShortDateString().ToString();
string jintian = this.dateTimePicker1.Text;
curdate = jintian;
begindate = jintian;
this.Refresh();
string sql = “select top " + count + " begintime,dayopen,dayclose,dayhigh,daylow,day5,day10,day20,day60 from " + gpname + " where begintime<=’” + jintian + “’ order by begintime desc”;
huatu(sql, count);
label1.Text = curdate;
this.textBox1.Text = “”;
}
}
//画K线方法
private void huatu(string sql,int num)
{
Graphics g = CreateGraphics();
Pen p = new Pen(Color.Red, 1);//上涨
Pen p1 = new Pen(Color.Green, 1);//下跌
Pen p2 = new Pen(Color.Black, 1);
Pen p3 = new Pen(Color.Brown, 1);
Pen p4 = new Pen(Color.Purple, 1);
Pen p5 = new Pen(Color.Blue, 1);
Point[] pointList5;//用来绘制曲线图的关键点，依次将这些点连接起来即得到曲线图(Ma5)
Point[] pointList10;//(Ma10)
Point[] pointList20;//(Ma20)
Point[] pointList60;//(Ma60)
DataSet ds = null;
DataTable dt = null;
ds = db.getds(sql, “mminfo”);
dt = ds.Tables[0];
pointList5 = new Point[dt.Rows.Count];//初始化坐标数组
pointList10 = new Point[dt.Rows.Count];//初始化坐标数组
pointList20 = new Point[dt.Rows.Count];//初始化坐标数组
pointList60 = new Point[dt.Rows.Count];//初始化坐标数组

        int Kwidth = width / dt.Rows.Count - 10;g.DrawRectangle(p, leftX, topY, width, height);//k线开始Font myFont = new Font("微软雅黑", 8);string begindate1 = null;          string overdate1=dt.Rows[dt.Rows.Count-1]["begintime"].ToString();overdate =overdate1.Substring(0,overdate1.IndexOf(" "));string begindate2 = dt.Rows[0]["begintime"].ToString();begindate = begindate2.Substring(0, begindate2.IndexOf(" "));decimal high = (decimal)dt.Compute("Max(dayhigh)", null);//选择的K线组合中最高价decimal low = (decimal)dt.Compute("Min(daylow)", null);//选择的K线组合中最低价decimal hhigh = Math.Floor(high);decimal llow = Math.Floor(low);float llow1 = float.Parse(llow.ToString());int changdu = width / dt.Rows.Count;//横轴每个日期的长度decimal hlow = hhigh - llow;//纵轴总共差价decimal oneprice = hlow / 10;float onepoint = float.Parse((height / hlow).ToString());//单个价格所占的纵轴坐标for (int i = 0; i < dt.Rows.Count; i++)//横轴时间{g.DrawLine(p, width + leftX - changdu * (i + 1) + Kwidth / 2, height + topY, width + leftX - changdu * (i + 1) + Kwidth / 2, height + topY + 10);//横线N等分(20整体向右移动20单位,600为矩形长度,80为矩形离窗体左边为80) }for (int i = 0; i < 9; i++)//纵轴价格{g.DrawLine(p, width + leftX, height + topY - 40 * (i + 1), width + leftX + 10, height + topY - 40 * (i + 1));//纵线10等分g.DrawString(((i + 1) * oneprice + llow).ToString(), myFont, Brushes.Red, width + leftX + 15, height + topY - 7 - height / 10 * (i + 1));}for (int i = 0; i < dt.Rows.Count; i++){int len1 = dt.Rows[i]["begintime"].ToString().IndexOf(" ");int len = dt.Rows[i]["begintime"].ToString().LastIndexOf('/') + 1;int len2 = dt.Rows[i]["begintime"].ToString().IndexOf('/') + 1;begindate1 = dt.Rows[i]["begintime"].ToString().Substring(len2, len1 - len2);float o = float.Parse(dt.Rows[i]["dayopen"].ToString());float c = float.Parse(dt.Rows[i]["dayclose"].ToString());float h = float.Parse(dt.Rows[i]["dayhigh"].ToString());float l = float.Parse(dt.Rows[i]["daylow"].ToString());float day5=float.Parse(dt.Rows[i]["day5"].ToString());float day10 = float.Parse(dt.Rows[i]["day10"].ToString());float day20 = float.Parse(dt.Rows[i]["day20"].ToString());float day60 = float.Parse(dt.Rows[i]["day60"].ToString());int px5 = int.Parse((width + 80 - changdu * (i + 1) + Kwidth / 2).ToString());int py5 = int.Parse(Math.Floor(height - (day5 - llow1) * onepoint+80).ToString());int py10 = int.Parse(Math.Floor(height - (day10 - llow1) * onepoint + 80).ToString());int py20 = int.Parse(Math.Floor(height - (day20 - llow1) * onepoint + 80).ToString());int py60 = int.Parse(Math.Floor(height - (day60 - llow1) * onepoint + 80).ToString());if (begindate1 == "10/30"){label17.Text = px5.ToString();label16.Text = py5.ToString();}pointList5[i] = new Point(px5, py5);pointList10[i] = new Point(px5, py10);pointList20[i] = new Point(px5, py20);pointList60[i] = new Point(px5, py60);g.DrawString(begindate1, myFont, Brushes.Red, new PointF(width + leftX - changdu * (i + 1) + Kwidth / 2 - 5, height + topY + 20));if (c > o){g.DrawLine(p, width + leftX - changdu * (i + 1) + Kwidth / 2, height - (c - llow1) * onepoint + topY, width + leftX - changdu * (i + 1) + Kwidth / 2, height - (h - llow1) * onepoint + topY);//上影(600为矩形长度,80为矩形到窗体左边的距离,60为长度10等分,10为纵柱最高价)g.DrawRectangle(p, width + leftX - changdu * (i + 1), height - (c - llow1) * onepoint + topY, Kwidth, (c - o) * onepoint);//实体(Kwidth为K线宽度)(20,40为调节K线大小)g.DrawLine(p, width + leftX - changdu * (i + 1) + Kwidth / 2, height - (o - llow1) * onepoint + topY, width + leftX - changdu * (i + 1) + Kwidth / 2, height - (l - llow1) * onepoint + topY);//下影 (20为整体向左平移20个单位)}else if (c < o){g.DrawLine(p1, width + leftX - changdu * (i + 1) + Kwidth / 2, height - (o - llow1) * onepoint + topY, width + leftX - changdu * (i + 1) + Kwidth / 2, height - (h - llow1) * onepoint + topY);//上影g.DrawRectangle(p1, width + leftX - changdu * (i + 1), height - (o - llow1) * onepoint + topY, Kwidth, (o - c) * onepoint);//实体g.DrawLine(p1, width + leftX - changdu * (i + 1) + Kwidth / 2, height - (c - llow1) * onepoint + topY, width + leftX - changdu * (i + 1) + Kwidth / 2, height - (l - llow1) * onepoint + topY);//下影 }else if (c == o){g.DrawLine(p, width + leftX - changdu * (i + 1) + Kwidth / 2, height - (o - llow1) * onepoint + topY, width + leftX - changdu * (i + 1) + Kwidth / 2, height - (h - llow1) * onepoint + topY);//上影g.DrawLine(p1, width + leftX - changdu * (i + 1), height - (o - llow1) * onepoint + topY, width + leftX - 20 - changdu * (i + 1) + 20 + Kwidth, height - (o - llow1) * onepoint + topY);//实体g.DrawLine(p, width + leftX - changdu * (i + 1) + Kwidth / 2, height - (c - llow1) * onepoint + topY, width + leftX - changdu * (i + 1) + Kwidth / 2, height - (l - llow1) * onepoint + topY);//下影 }if (i == 0){label28.Text = dt.Rows[i]["begintime"].ToString().Substring(0, len1);       }if (i == dt.Rows.Count - 1){label29.Text = dt.Rows[i]["begintime"].ToString().Substring(0, len1);               }}g.DrawCurve(p2, pointList5);//画5均线g.DrawCurve(p3, pointList10);//画10均线g.DrawCurve(p4, pointList20);//画20均线g.DrawCurve(p5, pointList60);//画60均线p.Dispose();g.Dispose();}private void Kxian_KeyDown(object sender, KeyEventArgs e){DataSet ds;string curdate1 = null;string sql = null;            string bdate = null;string odate = null;//int count = int.Parse(this.comboBox1.Text.Trim());//int count = 10;switch (e.KeyCode){case Keys.Left:sql = "select top 1 begintime,dayopen,dayclose,dayhigh,daylow,day5,day10,day20,day60 from "+gpname+" where begintime<'" + curdate + "' order by begintime desc";ds = db.getds(sql, "previous");if (ds.Tables[0].Rows.Count > 0){curdate1 = ds.Tables[0].Rows[0]["begintime"].ToString();curdate = curdate1.Substring(0, curdate1.IndexOf(" "));label1.Text = curdate;label7.Text = ds.Tables[0].Rows[0]["dayopen"].ToString();label6.Text = ds.Tables[0].Rows[0]["dayclose"].ToString();label9.Text = ds.Tables[0].Rows[0]["dayhigh"].ToString();label8.Text = ds.Tables[0].Rows[0]["daylow"].ToString();label12.Text = ds.Tables[0].Rows[0]["day5"].ToString();label11.Text = ds.Tables[0].Rows[0]["day10"].ToString();label22.Text = ds.Tables[0].Rows[0]["day20"].ToString();label21.Text = ds.Tables[0].Rows[0]["day60"].ToString();if (CompareDate(curdate, overdate) < 0){this.Refresh();sql = "select * from(select top " + half + "  begintime,dayopen,dayclose,dayhigh,daylow,day5,day10,day20,day60 from "+gpname+"  where begintime>='" + curdate + "' order by begintime asc) a order by begintime desc";huatu(sql, half);overdate = curdate;}}break;case Keys.Up:                   if (half >=10){this.Refresh();half = half / 2;bdate = DateTime.Parse(curdate).AddDays(-half).ToShortDateString();odate = DateTime.Parse(curdate).AddDays(half).ToShortDateString();sql = "select  begintime,dayopen,dayopen,dayclose,dayhigh,daylow,day5,day10,day20,day60 from "+gpname+"  where begintime between '" + bdate + "' and '" + odate + "' order by begintime desc ";huatu(sql, half);label2.Text = half.ToString();}break;case Keys.Right:sql = "select top 1 begintime,dayopen,dayclose,dayhigh,daylow,day5,day10,day20,day60 from "+gpname+" where begintime>'" + curdate + "' order by begintime asc";ds = db.getds(sql, "next");if (ds.Tables[0].Rows.Count > 0){curdate1 = ds.Tables[0].Rows[0]["begintime"].ToString();curdate = curdate1.Substring(0, curdate1.IndexOf(" "));label1.Text = curdate;label7.Text = ds.Tables[0].Rows[0]["dayopen"].ToString();label6.Text = ds.Tables[0].Rows[0]["dayclose"].ToString();label9.Text = ds.Tables[0].Rows[0]["dayhigh"].ToString();label8.Text = ds.Tables[0].Rows[0]["daylow"].ToString();label12.Text = ds.Tables[0].Rows[0]["day5"].ToString();label11.Text = ds.Tables[0].Rows[0]["day10"].ToString();label22.Text = ds.Tables[0].Rows[0]["day20"].ToString();label21.Text = ds.Tables[0].Rows[0]["day60"].ToString();if (CompareDate(curdate, begindate) > 0){this.Refresh();sql = "select top " + half + "  begintime,dayopen,dayclose,dayhigh,daylow,day5,day10,day20,day60 from "+gpname+"  where begintime<='" + curdate + "' order by begintime desc";huatu(sql, half);overdate = curdate;}}break;case Keys.Down:                  if (half < 356){half = half * 2;this.Refresh();bdate = DateTime.Parse(curdate).AddDays(-half).ToShortDateString();odate = DateTime.Parse(curdate).AddDays(half).ToShortDateString();sql = "select  begintime,dayopen,dayopen,dayclose,dayhigh,daylow,day5,day10,day20,day60 from "+gpname+"  where begintime between '" + bdate + "' and '" + odate + "' order by begintime desc ";huatu(sql, half);label2.Text = half.ToString();}  break;}}//画箭头private void button2_Click(object sender, EventArgs e){Graphics g = CreateGraphics();string bdate = this.label28.Text;string curdate = this.label1.Text;string odate = this.label29.Text;string begindate1 = null;string sql = "select  begintime,dayopen,dayclose,dayhigh,daylow,day5,day10,day20,day60 from " + gpname + "  where begintime between '" + odate + "' and '" + bdate + "' order by begintime desc ";DataSet ds = null;DataTable dt = null;ds = db.getds(sql, "mminfo");dt = ds.Tables[0];int changdu = width / dt.Rows.Count;//横轴每个日期的长度int Kwidth = width / dt.Rows.Count - 10;//单个K线的长度decimal high = (decimal)dt.Compute("Max(dayhigh)", null);//选择的K线组合中最高价decimal low = (decimal)dt.Compute("Min(daylow)", null);//选择的K线组合中最低价decimal hhigh = Math.Floor(high);decimal llow = Math.Floor(low);float llow1 = float.Parse(llow.ToString());decimal hlow = hhigh - llow;//纵轴总共差价float onepoint = float.Parse((height / hlow).ToString());//单个价格所占的纵轴坐标for (int i = 0; i < dt.Rows.Count; i++){int len1 = dt.Rows[i]["begintime"].ToString().IndexOf(" ");begindate1 = dt.Rows[i]["begintime"].ToString().Substring(0, len1);if (curdate == begindate1){float h = float.Parse(dt.Rows[i]["dayhigh"].ToString());g.SmoothingMode = SmoothingMode.AntiAlias;Pen p = new Pen(Color.Red, 7);p.StartCap = LineCap.Square;p.EndCap = LineCap.ArrowAnchor;g.DrawLine(p, width + leftX - changdu * (i + 1) + Kwidth / 2, height - (h - llow1) * onepoint + topY-100, width + leftX - changdu * (i + 1) + Kwidth / 2, height - (h - llow1) * onepoint + topY);p.Dispose();g.Dispose();}}}//截图private void button4_Click(object sender, EventArgs e){string path = "d:\\111.jpg";Point startP = new Point(0, 0);startP = this.PointToScreen(startP);Image img = new Bitmap(width + 50, height + 50);Graphics g = Graphics.FromImage(img);g.CopyFromScreen(new Point(startP.X+leftX,startP.Y+topY),new Point(0,0),img.Size);img.Save(path);this.textBox2.Text=path;}

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