程序可以运行，不过在二个点之间的空数据要么显示前一点的值，要么显示后一点的值，并没有显示为平均值

Question

string dbPath = @"D:\历年高考分数.db";
string sq = @"Data Source=" + dbPath;
m = new SQLiteConnection(sq);
m.Open();
SQLiteDataAdapter mAdapter = new SQLiteDataAdapter("select Volume1,Volume2 from 曲线", m);
DataSet ds = new DataSet();
mAdapter.Fill(ds);
DataTable dt = ds.Tables[0];

        //设置图表的数据源
        Chart1.DataSource = dt;
        // Chart1.Series.Clear();
        Chart1.Series["Series1"].ChartType = SeriesChartType.Spline;
        Chart1.Series[0].XValueMember = "Volume1";//X轴数据成员列
        Chart1.Series[0].YValueMembers = "Volume2";//Y轴数据成员列
        Chart1.Series[0].IsValueShownAsLabel = true;//显示坐标
        Chart1.Series[0].MarkerStyle = MarkerStyle.Circle;
        Chart1.Series[0].ToolTip = "运行里程：#VALX\\n故障率：#VALY";
        //将文字移到外侧
        Chart1.Series[0]["PieLabelStyle"] = "Outside";
        Chart1.Series[0].CustomProperties = "EmptyPointValue = Average"
        Chart1.ChartAreas[0].CursorX.IsUserEnabled = true;
        Chart1.ChartAreas[0].CursorX.AutoScroll = true;
        Chart1.ChartAreas[0].CursorX.IsUserSelectionEnabled = true;
        Chart1.ChartAreas[0].CursorY.IsUserEnabled = true;
        Chart1.ChartAreas[0].CursorY.AutoScroll = true;
        Chart1.ChartAreas[0].CursorY.IsUserSelectionEnabled = true;
        Chart1.DataBind();
        m.Close();

Answer 1

https://blog.csdn.net/weixin_40902181/article/details/84952951