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This article will explain in detail how to realize the dynamic curve drawing of chart control in C#. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

The details are as follows

Thought

Laboratory to do a dynamic curve drawing, there are many online methods, but the lack of complete code and effect map integration, often lack of one of them, so sort out the following, convenient for everyone to program and save time.

Idea: create a new queue and use the timer control to dynamically add data to the queue. Each time an event is triggered, it is tantamount to redrawing all the values in the queue.

My goal is to do dynamic monitoring of four points, so the code is repeated four times, in fact, it should be done with four threads, the train of thought is clearer, this is also where it can be improved.

Public partial class interface _ Xtratabcontrol version _: Form {private Queue dataQueue1 = new Queue; / / 30 is cleared once private Queue dataQueue2 = new Queue; / / 30 is cleared once private Queue dataQueue3 = new Queue (100); / / 30 is cleared once private Queue dataQueue4 = new Queue (100); / / 30 is cleared once private int stress1 = 0 / / set a pressure value global variable private int stress2 = 0 false / set a pressure value global variable private int stress3 = 0 false / set a pressure value global variable string monthNow = ""; set a pressure value global variable string monthNow = ""; set a pressure value global variable = ""; set a pressure value global variable = "; set a pressure value global variable string monthNow ="; set a pressure value global variable string monthNow = "; set a pressure value global variable string monthNow ="; set a pressure value global variable string monthNow = "; set a pressure value global variable string monthNow ="; set a pressure value global variable string monthNow = "; set a pressure value global variable string monthNow ="; set a pressure value global variable string monthNow = "; set a pressure value global variable string monthNow ="; set a pressure value global variable string monthNow = "; set a pressure value global variable string monthNow ="; pressure = "; set a pressure Public interface _ Xtratabcontrol version _ () {InitializeComponent (); dataGridView1.AutoGenerateColumns = false; / / setting does not automatically display unbound columns in the database / / sets interlaced background color this.dataGridView1.RowsDefaultCellStyle.BackColor = Color.Bisque; this.dataGridView1.AlternatingRowsDefaultCellStyle.BackColor = Color.Beige } private void btnInit_Click (object sender, EventArgs e) {InitChart1 (); InitChart2 (); InitChart3 (); InitChart4 ();} private void btnStart_Click (object sender, EventArgs e) {this.timer1.Start () } private void btnStop_Click (object sender, EventArgs e) {this.timer1.Stop ();} private void timer1_Tick (object sender, EventArgs e) {try {UpdateDate (); / / take a data based on the current time and assign a dataQueue1.Enqueue (stress1) to month / / that's it. Keep adding data to it. DataQueue2.Enqueue (stress2); dataQueue3.Enqueue (stress3); dataQueue4.Enqueue (stress4); if (isRefresh) {/ / refresh interface isRefresh = false; InitChart1 (); InitChart2 (); InitChart3 () InitChart4 (); dataQueue1.Enqueue (stress1); dataQueue2.Enqueue (stress2); dataQueue3.Enqueue (stress3); dataQueue4.Enqueue (stress4);} this.chart1.Series [0] .Points.clear () This.chart2.Series [0] .Points.Clear (); this.chart3.Series [0] .Points.Clear (); this.chart4.Series [0] .Points.Clear (); for (int I = 0; I

< dataQueue1.Count; i++) { this.chart1.Series[0].Points.AddXY((i + 1), dataQueue1.ElementAt(i)); 相当于每次都是重新画一遍 } for (int i = 0; i < dataQueue2.Count; i++) { this.chart2.Series[0].Points.AddXY((i + 1), dataQueue2.ElementAt(i)); 相当于每次都是重新画一遍 } for (int i = 0; i < dataQueue3.Count; i++) { this.chart3.Series[0].Points.AddXY((i + 1), dataQueue3.ElementAt(i)); 相当于每次都是重新画一遍 } for (int i = 0; i < dataQueue4.Count; i++) { this.chart4.Series[0].Points.AddXY((i + 1), dataQueue4.ElementAt(i)); 相当于每次都是重新画一遍 } } catch (Exception ex) { MessageBox.Show(ex.Message); } } private void InitChart1() { try { //定义图表区域 this.chart1.ChartAreas.Clear(); ChartArea chartArea1 = new ChartArea("C1"); this.chart1.ChartAreas.Add(chartArea1); //this.chart1.Dock = DockStyle.Fill; //定义存储和显示点的容器 this.chart1.Series.Clear(); Series series1 = new Series("S1"); series1.ChartArea = "C1"; this.chart1.Series.Add(series1); //设置图表显示样式 this.chart1.ChartAreas[0].AxisY.Minimum = 30000; this.chart1.ChartAreas[0].AxisY.Maximum = 50000; this.chart1.ChartAreas[0].AxisX.Minimum = 1; this.chart1.ChartAreas[0].AxisX.Maximum = 31; this.chart1.ChartAreas[0].AxisX.Interval = 1; this.chart1.ChartAreas[0].AxisX.MajorGrid.LineColor = System.Drawing.Color.Silver; this.chart1.ChartAreas[0].AxisY.MajorGrid.LineColor = System.Drawing.Color.Silver; //设置标题 this.chart1.Titles.Clear(); this.chart1.Titles.Add("S01"); this.chart1.Titles[0].Text = "1号监测点"; this.chart1.Titles[0].ForeColor = Color.RoyalBlue; this.chart1.Titles[0].Font = new System.Drawing.Font("Microsoft Sans Serif", 12F); //设置图表显示样式 this.chart1.Series[0].Color = Color.Red; if (rb1.Checked) { //this.chart1.Titles[0].Text = string.Format("动态 {0} 显示", rb1.Text); this.chart1.Titles[0].Text = string.Format("1号监测点"); this.chart1.Series[0].ChartType = SeriesChartType.Line; } if (rb2.Checked) { this.chart1.Titles[0].Text = string.Format("动态 {0} 显示", rb1.Text); this.chart1.Series[0].ChartType = SeriesChartType.Spline; } this.chart1.Series[0].Points.Clear(); //DBEngine.ConnectDB("orcl", "dt", "6312"); dataQueue1.Clear();//清空队列中所有数据 } catch (Exception ex) { } } private void InitChart2() { try { //定义图表区域 this.chart2.ChartAreas.Clear(); ChartArea chartArea2 = new ChartArea("C2"); this.chart2.ChartAreas.Add(chartArea2); //this.chart1.Dock = DockStyle.Fill; //定义存储和显示点的容器 this.chart2.Series.Clear(); Series series2 = new Series("S2"); series2.ChartArea = "C2"; this.chart2.Series.Add(series2); //设置图表显示样式 this.chart2.ChartAreas[0].AxisY.Minimum = 30000; this.chart2.ChartAreas[0].AxisY.Maximum = 50000; this.chart2.ChartAreas[0].AxisX.Minimum = 1; this.chart2.ChartAreas[0].AxisX.Maximum = 31; this.chart2.ChartAreas[0].AxisX.Interval = 1; this.chart2.ChartAreas[0].AxisX.MajorGrid.LineColor = System.Drawing.Color.Silver; this.chart2.ChartAreas[0].AxisY.MajorGrid.LineColor = System.Drawing.Color.Silver; //设置标题 this.chart2.Titles.Clear(); this.chart2.Titles.Add("S02"); this.chart2.Titles[0].Text = "动态折线图显示"; this.chart2.Titles[0].ForeColor = Color.RoyalBlue; this.chart2.Titles[0].Font = new System.Drawing.Font("Microsoft Sans Serif", 12F); //标题字体 //设置图表显示样式 this.chart2.Series[0].Color = Color.Red; if (rb1.Checked) { //this.chart2.Titles[0].Text = string.Format("动态 {0} 显示", rb1.Text); this.chart2.Titles[0].Text = string.Format("2号监测点"); this.chart2.Series[0].ChartType = SeriesChartType.Line; } if (rb2.Checked) { this.chart2.Titles[0].Text = string.Format("动态 {0} 显示", rb1.Text); this.chart2.Series[0].ChartType = SeriesChartType.Spline; } this.chart2.Series[0].Points.Clear(); //DBEngine.ConnectDB("orcl", "dt", "6312"); dataQueue2.Clear();//清空队列中所有数据 } catch (Exception ex) { } } private void InitChart3() { try { //定义图表区域 this.chart3.ChartAreas.Clear(); ChartArea chartArea3 = new ChartArea("C3"); this.chart3.ChartAreas.Add(chartArea3); //this.chart1.Dock = DockStyle.Fill; //定义存储和显示点的容器 this.chart3.Series.Clear(); Series series3 = new Series("S3"); series3.ChartArea = "C3"; this.chart3.Series.Add(series3); //设置图表显示样式 this.chart3.ChartAreas[0].AxisY.Minimum = 30000; this.chart3.ChartAreas[0].AxisY.Maximum = 50000; this.chart3.ChartAreas[0].AxisX.Minimum = 1; this.chart3.ChartAreas[0].AxisX.Maximum = 31; this.chart3.ChartAreas[0].AxisX.Interval = 1; this.chart3.ChartAreas[0].AxisX.MajorGrid.LineColor = System.Drawing.Color.Silver; this.chart3.ChartAreas[0].AxisY.MajorGrid.LineColor = System.Drawing.Color.Silver; //设置标题 this.chart3.Titles.Clear(); this.chart3.Titles.Add("S03"); this.chart3.Titles[0].Text = "动态折线图显示"; this.chart3.Titles[0].ForeColor = Color.RoyalBlue; this.chart3.Titles[0].Font = new System.Drawing.Font("Microsoft Sans Serif", 12F); //标题字体 //设置图表显示样式 this.chart3.Series[0].Color = Color.Red; if (rb1.Checked) { //this.chart3.Titles[0].Text = string.Format("动态 {0} 显示", rb1.Text); this.chart3.Titles[0].Text = string.Format("3号监测点"); this.chart3.Series[0].ChartType = SeriesChartType.Line; } if (rb2.Checked) { this.chart3.Titles[0].Text = string.Format("动态 {0} 显示", rb1.Text); this.chart3.Series[0].ChartType = SeriesChartType.Spline; } this.chart3.Series[0].Points.Clear(); //DBEngine.ConnectDB("orcl", "dt", "6312"); dataQueue3.Clear();//清空队列中所有数据 } catch (Exception ex) { } } private void InitChart4() { try { //定义图表区域 this.chart4.ChartAreas.Clear(); ChartArea chartArea4 = new ChartArea("C4"); this.chart4.ChartAreas.Add(chartArea4); //this.chart1.Dock = DockStyle.Fill; //定义存储和显示点的容器 this.chart4.Series.Clear(); Series series4 = new Series("S4"); series4.ChartArea = "C4"; this.chart4.Series.Add(series4); //设置图表显示样式 this.chart4.ChartAreas[0].AxisY.Minimum = 30000; this.chart4.ChartAreas[0].AxisY.Maximum = 50000; this.chart4.ChartAreas[0].AxisX.Minimum = 1; this.chart4.ChartAreas[0].AxisX.Maximum = 31; this.chart4.ChartAreas[0].AxisX.Interval = 1; this.chart4.ChartAreas[0].AxisX.MajorGrid.LineColor = System.Drawing.Color.Silver; this.chart4.ChartAreas[0].AxisY.MajorGrid.LineColor = System.Drawing.Color.Silver; //设置标题 this.chart4.Titles.Clear(); this.chart4.Titles.Add("S04"); this.chart4.Titles[0].Text = "动态折线图显示"; this.chart4.Titles[0].ForeColor = Color.RoyalBlue; this.chart4.Titles[0].Font = new System.Drawing.Font("Microsoft Sans Serif", 12F); //标题字体 //设置图表显示样式 this.chart4.Series[0].Color = Color.Red; if (rb1.Checked) { //this.chart4.Titles[0].Text = string.Format("动态 {0} 显示", rb1.Text); this.chart4.Titles[0].Text = string.Format("4号监测点"); this.chart4.Series[0].ChartType = SeriesChartType.Line; } if (rb2.Checked) { this.chart4.Titles[0].Text = string.Format("动态 {0} 显示", rb1.Text); this.chart4.Series[0].ChartType = SeriesChartType.Spline; } this.chart4.Series[0].Points.Clear(); //DBEngine.ConnectDB("orcl", "dt", "6312"); dataQueue4.Clear();//清空队列中所有数据 } catch (Exception ex) { } } private void UpdateDate() { //1 2 3 4号点同时更新 try { //获取当前时间的batch值，将batch+1的时间值提取显示。 string selectsql = string.Format("select * from stressinfo where operatetime=to_date('{0}','yyyy-mm-dd')", dtp1.Value.ToShortDateString()); DataTable dtDate = new DataTable(); dtDate = DBEngine.GetDataTableBySql(selectsql); if (dtDate.Rows.Count >

0) / / 4 {string [] getmonthNow = dtp1.Value.ToShortDateString (). Split ('/'); / / some computers are'- 'monthNow = getmonthNow [1]; int currentBatch = DBEngine.ObjToInt (dtDate.Rows [0] ["batchnum"]) / / int currentNode = DBEngine.ObjToInt (dtDate.Rows [0] ["NODE"]); / / current node and current batch determine unique record currentBatch++; / / get the next displayed time value and stress value string nextsql1 = string.Format ("select * from stressinfo where batchnum=' {0} 'and node=1", currentBatch) DataTable dtNext1 = new DataTable (); dtNext1 = DBEngine.GetDataTableBySql (nextsql1); / / all stress monitoring data for the next batch are obtained. If (dtNext1.Rows.Count > 0) {stress1 = DBEngine.ObjToInt (dtNext1.Rows [0] ["CURRENTSTRESS"]); dtp1.Value = DBEngine.ObjToDateTime (dtNext1.Rows [0] ["OPERATETIME"]); / / date display (after which there should be stress extraction at various points) currentTime = dtp1.Value.ToShortDateString () String [] datetime = currentTime.Split ('/'); monthNext = datetime [1]; if (monthNow! = monthNext) isRefresh = true } else {timer1.Stop (); / / the data is over, there is no data, and batch+1 can't find btnStop.Focus () / / stop key focus display} / second point without updating data string nextsql2 = string.Format ("select * from stressinfo where batchnum=' {0} 'and node=2", currentBatch); DataTable dtNext2 = new DataTable (); dtNext2 = DBEngine.GetDataTableBySql (nextsql2) / / the data of all stress monitoring points for the next batch are obtained. If (dtNext2.Rows.Count > 0) {stress2 = DBEngine.ObjToInt (dtNext2.Rows [0] ["CURRENTSTRESS"]);} else {timer1.Stop () / / data is over, there is no data, batch+1 can not find btnStop.Focus (); / / stop key focus display} / third point, do not update data string nextsql3 = string.Format ("select * from stressinfo where batchnum=' {0} 'and node=3", currentBatch) DataTable dtNext3 = new DataTable (); dtNext3 = DBEngine.GetDataTableBySql (nextsql3); / / all stress monitoring data for the next batch are obtained. If (dtNext3.Rows.Count > 0) {stress3 = DBEngine.ObjToInt (dtNext3.Rows [0] ["CURRENTSTRESS"]);} else {timer1.Stop () / / data is over, there is no data, batch+1 can not find btnStop.Focus (); / / stop key focus display} / fourth point, do not update data string nextsql4 = string.Format ("select * from stressinfo where batchnum=' {0} 'and node=4", currentBatch) DataTable dtNext4 = new DataTable (); dtNext4 = DBEngine.GetDataTableBySql (nextsql4); / / all stress monitoring data for the next batch are obtained. If (dtNext4.Rows.Count > 0) {stress4 = DBEngine.ObjToInt (dtNext4.Rows [0] ["CURRENTSTRESS"]);} else {timer1.Stop () / / data is over, there is no data, batch+1 can not find btnStop.Focus (); / / stop key focus display} catch {}}

Because it involves some business, some code is not sticky, the data interacts with the Oracle database, and the class file name is DBEngine.cs. Don't forget to connect to the database when you do it yourself, and the final effect picture

On "C# how to achieve chart control dynamic curve drawing" this article is shared here, I hope the above content can be of some help to you, so that you can learn more knowledge, if you think the article is good, please share it out for more people to see.

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