C # Chart Control drawing curves

In. NET before, often with GDI to draw, although the effect is good, since the beginning of. NET 4.0, a chart control specifically for charting has appeared, with it, you can easily draw the graphs you need, histograms and so on.

Using system;using system.collections.generic;using system.linq;using system.text;using System.Windows.Forms;using System.windows.forms.datavisualization.charting;using System.Drawing; namespace drawgraph{//<summary>///Draw curve class///</summary> public static class Drawclass {#region draw Curve function///<summary>///Draw curve function////</summary>//<param name= "Listx" >x value collection </param&         Gt <param name= "listy" >y value collection </param>///<param Name= "chart" >chart controls </param> Publi             c static void DrawSpline (List<int> listx, list<double> listy, chart chart) {Try {//x, Y-value member chart. Series[0].                 POINTS.DATABINDXY (Listx, listy); Chart. Series[0].                 Points.databindy (listy); Dot Color Chart. Series[0].                 Markercolor = Color.green; The chart type is set to the spline curve chart. Series[0]. ChartType = SerieScharttype.spline; Sets the size of the point chart. Series[0].                 Markersize = 5; Sets the color of the curve chart. Series[0].                 Color = Color.orange; Set the curve width chart. Series[0].                 BorderWidth = 2; Chart. Series[0].                 CustomProperties = "pointwidth=4"; Sets whether the coordinate callout chart is displayed. Series[0].                 Isvalueshownaslabel = false; Sets the cursor chart. Chartareas[0].                 Cursorx.isuserenabled = true; Chart. Chartareas[0].                 Cursorx.autoscroll = true; Chart. Chartareas[0].                 Cursorx.isuserselectionenabled = true; Sets whether the X-axis can scale the chart. Chartareas[0].                 AxisX.ScaleView.Zoomable = true; Place the scroll bar outside the chart. Chartareas[0].                 AxisX.ScrollBar.IsPositionedInside = false; Sets the size of the scroll bar chart. Chartareas[0].                 AxisX.ScrollBar.Size = 15; To set the style of the button for the scrollbar, the following code shows all the buttons on the scroll bar. ChaRt. Chartareas[0].                 AxisX.ScrollBar.ButtonStyle = Scrollbarbuttonstyles.all; Chart. Chartareas[0].                 AxisX.ScrollBar.ButtonColor = Color.skyblue; Sets the minimum amount of automatic zoom and zoom chart. Chartareas[0]. AxisX.ScaleView.SmallScrollSize = Double.                 NaN; Chart. Chartareas[0].                 AxisX.ScaleView.SmallScrollMinSize = 1; Set the tick interval chart. Chartareas[0].                 Axisx.interval = 10; Cancels the chart on the x-axis grid. Chartareas[0].                 AxisX.MajorGrid.Enabled = false; X-axis, y-axis title chart. Chartareas[0].                 Axisx.title = "ring number"; Chart. Chartareas[0].                 Axisy.title = "diameter";                 Set the y-axis range to re-modify double max = listy[0] According to the actual situation;                 Double min = listy[0];                         foreach (Var yvalue in listy) {if (Max < Yvalue) {                     max = Yvalue; } if (Min > YValue) {min = Yvalue; }} chart. Chartareas[0].                 Axisy.maximum = max; Chart. Chartareas[0].                 axisy.minimum = min; Chart. Chartareas[0].                 Axisy.interval = (max-min)/10; Binds the data source chart.             DataBind (); } catch (Exception exc) {MessageBox.Show (exc.             ToString ()); }} #endregion #region mouse click, display the cursor through the ring number, and zoom to the response location///<summary>//mouse click, through the ring number display cursor, and zoom to the response position function///</summary>//<param name= "Ringnum" > Ring </param>//<param             Name= "Chart" >chart control </param> public static void Showcurbyclick (int ringnum, chart chart) { Sets the cursor position of the chart. Chartareas[0].             Cursorx.position = Ringnum; Set the view Zoom chart. Chartareas[0]. AxisX.ScaleView.Zoom (RingNum-1, Ringnum + 2); Change the Curve line width chart. Series[0].             BorderWidth = 3; Change the x-axis scale interval chart. Chartareas[0].         Axisx.interval = 1; } #endregion}}

Reference articles
1. Drawing graphs using the. NET chart control

C # Chart Control drawing curves