最近做一个上位机的项目，要求实时显示温度曲线，开始用.net自带的 chart控做的，在动态显示那块，在删除一个数据点、加入一个新的数据点的时候，新的数据点显示不出来；纠结好久，解决不了这个问题。后来只好选择开源.net控件zedgraph。

ZedGraph 是用于创建任意数据的二维线型、棒型、饼型图表的一个类库，也可以作为 Windows 窗体用户控件和 ASP 网页访问控件。这个类库具有高度的灵活性，几乎所有式样的图表都能够被创建。关于zedgraph控件的使用具体。参考官网介绍：http://www.codeproject.com/Articles/5431/A-flexible-charting-library-for-NET

在项目中遇到的问题总结如下：

一、曲线图基本参数设置：

             //标题和x轴、y轴标签

根据上面的设置就可以很容易定制自己的曲线图了。

三、程序参考：

<span style="font-size:14px;">        //标题、标签this.zedGraphControl1.GraphPane.Title.Text = "实时曲线图";this.zedGraphControl1.GraphPane.Title.FontSpec.FontColor = Color.Blue;this.zedGraphControl1.GraphPane.Title.FontSpec.Size = 30f;this.zedGraphControl1.GraphPane.XAxis.Title.Text = "时间";this.zedGraphControl1.GraphPane.XAxis.Title.FontSpec.FontColor = Color.Blue;this.zedGraphControl1.GraphPane.XAxis.Title.FontSpec.Size = 20f;this.zedGraphControl1.GraphPane.YAxis.Title.Text = "温度(℃)";this.zedGraphControl1.GraphPane.YAxis.Title.FontSpec.FontColor = Color.Blue;this.zedGraphControl1.GraphPane.YAxis.Title.FontSpec.Size = 20f;//this.zedGraphControl1.GraphPane.Chart.Border.Color  = Color .White  ;this.zedGraphControl1.GraphPane.Chart.IsRectAuto =true ;//刻度值字体大小this.zedGraphControl1.GraphPane.XAxis.Scale.FontSpec.Size = 20f;this.zedGraphControl1.GraphPane.YAxis.Scale.FontSpec.Size = 20f;this.zedGraphControl1.GraphPane.YAxis.Scale.Min = 0;this.zedGraphControl1.GraphPane.YAxis.Scale.Max = 50;//x轴类型this.zedGraphControl1.GraphPane.XAxis.Type = ZedGraph.AxisType.Date;this.zedGraphControl1.GraphPane.XAxis.Scale.Format = "HH:mm:ss";//显示网格线this.zedGraphControl1.GraphPane.YAxis.MajorGrid.IsVisible = true;this.zedGraphControl1.GraphPane.XAxis.MajorGrid.IsVisible = true;//legendthis.zedGraphControl1.GraphPane.Legend.FontSpec.Size = 10f;this.zedGraphControl1.GraphPane.Legend.Position = LegendPos.InsideTopRight;//面板填充颜色this.zedGraphControl1.GraphPane.Chart.Fill = new Fill(Color.White, Color.LightGray, 45.0f);//设置窗口大小SetSize();//更新画面this.zedGraphControl1.AxisChange();this.zedGraphControl1.Refresh();
</span>

定时显示程序：

<span style="font-size:14px;">         private void timer2_Tick(object sender, EventArgs e){this.zedGraphControl1.GraphPane.CurveList.Clear();//温度曲线1try{y = Convert.ToDouble(Convert.ToInt16(strTempureArry[4]) / 100.00); ;}catch{return;}//存储数据     StoreDataDelegate myStoreDataDelegate = new StoreDataDelegate(StoreData);//实例化委托myStoreDataDelegate(DateTimeNow, y);//调用委托list.Add(x, y);               LineItem mycurve = zedGraphControl1.GraphPane.AddCurve("温度传感器1", list, Color.Red, SymbolType.Circle);                          mycurve.Line.Width = 2.0F;//线宽TextObj textT1 = new TextObj(y.ToString("") + "℃",x, y*1.02, CoordType.AxisXYScale, AlignH.Center , AlignV.Bottom);textT1.FontSpec.Size = 10f;textT1.FontSpec.FontColor = Color.Red;textT1.FontSpec.Fill.IsVisible = false;textT1.FontSpec.Border.IsVisible = false;//textT1.ZOrder = ZOrder.A_InFront;//textT1.FontSpec.Fill = new Fill(Color.FromArgb(240, Color.Snow));this.zedGraphControl1.GraphPane.GraphObjList.Add(textT1);this.zedGraphControl1.AxisChange();this.zedGraphControl1.Refresh();//this.zedGraphControl1.Invalidate();if (list.Count >= 10){list.RemoveAt(0);//同时清除该点的值this.zedGraphControl1.GraphPane.GraphObjList.RemoveAt(0);}}
</span>

控件大小设置：

         private void SetSize(){zedGraphControl1.Location = new Point(10, 10);zedGraphControl1.Size = new Size(ClientRectangle.Width - 100, ClientRectangle.Height - 200);}