C# Chart图表X轴时间标签不能正常显示
问题遇到的现象和发生背景
C# Winform Chart Line折线图鼠标框选放大后不显示x轴标签；其次鼠标框选局部放大有没有触发对应的函数事件，怎样重写这个事件
遇到的现象和发生背景，请写出第一个错误信息
double size = chart.ChartAreas[0].AxisX.ScaleView.Size;
size = NaN；鼠标滚轮放大和框选局部放大会有冲突，局部放大后在用鼠标缩放会导致折线图不显示（已取消鼠标缩放）
用代码块功能插入代码，请勿粘贴截图。 不用代码块回答率下降 50%
//初始化图表控件，2个折线图，上下联动的。支持鼠标框选放大
private void InitChat()
{
ChartLine.ChartAreas[0].AxisX.MajorGrid.LineDashStyle = ChartDashStyle.NotSet; //未设置网格类型
ChartLine.ChartAreas[0].AxisY.MajorGrid.LineDashStyle = ChartDashStyle.Solid; //设置网格类型为实线
// ChartLine.Series[0].IsValueShownAsLabel = true;//设置显示示数
ChartLine.ChartAreas[0].AxisX.ScrollBar.Enabled = true;
ChartLine.ChartAreas[0].AxisX.ScaleView.Position = 1;
ChartLine.ChartAreas[0].AxisX.ScaleView.Size = 100;
ChartLine.ChartAreas[0].AxisX.ScrollBar.ButtonStyle = ScrollBarButtonStyles.SmallScroll;
ChartLine.ChartAreas[0].AxisX.ScrollBar.ButtonColor = SystemColors.Control;
ChartLine.ChartAreas[0].AxisX.ScrollBar.LineColor = SystemColors.Control;
ChartLine.ChartAreas[0].AxisX.ScrollBar.IsPositionedInside = false;
ChartLine.ChartAreas[0].AxisX.MajorGrid.LineColor = Color.PaleGreen;
ChartLine.ChartAreas[0].AxisX.MinorGrid.Enabled = true;
ChartLine.ChartAreas[0].AxisX.MinorGrid.LineColor = Color.WhiteSmoke;
ChartLine.ChartAreas[0].AxisX.MinorTickMark.Enabled = true;
ChartLine.ChartAreas[0].AxisX.MinorTickMark.LineColor = Color.DimGray;
ChartLine.ChartAreas[0].CursorX.SelectionColor = Color.SkyBlue;
ChartLine.ChartAreas[0].CursorX.Interval = 0D;
ChartLine.ChartAreas[0].CursorX.IntervalOffsetType = DateTimeIntervalType.Auto;
ChartLine.ChartAreas[0].CursorX.IsUserEnabled = true;
ChartLine.ChartAreas[0].CursorX.IsUserSelectionEnabled = true;
ChartLine.Cursor = System.Windows.Forms.Cursors.Cross;
// X 时间轴 设置
ChartLine.ChartAreas[0].AxisX.LabelStyle.IntervalType = DateTimeIntervalType.Hours;//设置x轴间隔值单位：秒
ChartLine.ChartAreas[0].AxisX.LabelStyle.Interval = 2;//设置X轴的值的间隔大小
ChartLine.ChartAreas[0].AxisX.LabelStyle.IsEndLabelVisible = false;//是否在轴末尾显示标记
ChartLine.ChartAreas[0].AxisX.LabelStyle.Format = "HH:mm:ss";//设置X轴的数据样式
ChartLine.ChartAreas[0].AxisX.ScaleView.MinSizeType = DateTimeIntervalType.Minutes;
ChartLine.ChartAreas[0].AxisX.ScaleView.SizeType = DateTimeIntervalType.Minutes; //度量单位
ChartLine.ChartAreas[0].AxisX.ScaleView.SmallScrollMinSize = 1D;
ChartLine.ChartAreas[0].AxisX.ScaleView.SmallScrollMinSizeType = DateTimeIntervalType.Minutes;
ChartLine.ChartAreas[0].AxisX.IntervalType = DateTimeIntervalType.Minutes;
//ChartLine.ChartAreas[0].AxisX.LabelStyle.IsStaggered = true;
ChartPlcLine.ChartAreas[0].AxisX.MajorGrid.LineDashStyle = ChartDashStyle.NotSet; //未设置网格类型
ChartPlcLine.ChartAreas[0].AxisY.MajorGrid.LineDashStyle = ChartDashStyle.Solid; //设置网格类型为实线
ChartPlcLine.ChartAreas[0].AxisY.MajorGrid.LineColor = Color.PaleGreen;
// ChartLine.Series[0].IsValueShownAsLabel = true;//设置显示示数
ChartPlcLine.ChartAreas[0].AxisX.ScrollBar.Enabled = true;
ChartPlcLine.ChartAreas[0].AxisX.ScaleView.Position = 1;
ChartPlcLine.ChartAreas[0].AxisX.ScaleView.Size = 100;
ChartPlcLine.ChartAreas[0].AxisX.ScrollBar.ButtonStyle = ScrollBarButtonStyles.SmallScroll;
ChartPlcLine.ChartAreas[0].AxisX.ScrollBar.ButtonColor = SystemColors.Control;
ChartPlcLine.ChartAreas[0].AxisX.ScrollBar.LineColor = SystemColors.Control;
ChartPlcLine.ChartAreas[0].AxisX.ScrollBar.IsPositionedInside = false;
// ChartPlcLine.ChartAreas[0].AxisX.Interval = 10;
// X 时间轴 设置
ChartPlcLine.ChartAreas[0].AxisX.LabelStyle.IntervalType = DateTimeIntervalType.Hours;//设置x轴间隔值单位：秒
ChartPlcLine.ChartAreas[0].AxisX.LabelStyle.Interval = 2;//设置X轴的值的间隔大小
ChartPlcLine.ChartAreas[0].AxisX.LabelStyle.IsEndLabelVisible = false;//是否在轴末尾显示标记
ChartPlcLine.ChartAreas[0].AxisX.LabelStyle.Format = "HH:mm:ss";//设置X轴的数据样式
ChartPlcLine.ChartAreas[0].AxisX.ScaleView.MinSizeType = DateTimeIntervalType.Minutes;
ChartPlcLine.ChartAreas[0].AxisX.ScaleView.SizeType = DateTimeIntervalType.Minutes; //度量单位
ChartPlcLine.ChartAreas[0].AxisX.ScaleView.SmallScrollMinSize = 1D;
ChartPlcLine.ChartAreas[0].AxisX.ScaleView.SmallScrollMinSizeType = DateTimeIntervalType.Minutes;
ChartPlcLine.ChartAreas[0].AxisX.IntervalType = DateTimeIntervalType.Minutes;
ChartPlcLine.ChartAreas[0].CursorX.Interval = 0D;
ChartPlcLine.ChartAreas[0].CursorX.IntervalOffsetType = DateTimeIntervalType.Minutes;
ChartPlcLine.ChartAreas[0].CursorX.IsUserEnabled = true;
ChartPlcLine.ChartAreas[0].CursorX.IsUserSelectionEnabled = true;
ChartPlcLine.Cursor = Cursors.Cross;
// ChartPlcLine.Customize += ChartPlcLine_Customize;
ChartLine.Customize += ChartLine_Customize;
// ChartLine.MouseWheel += ChartLine_MouseWheel;
// ChartPlcLine.MouseWheel += ChartLine_MouseWheel;
ChartLine.MouseClick += ChartLine_MouseClick;
ChartPlcLine.MouseClick += ChartLine_MouseClick;
}
private void ChartLine_MouseClick(object sender, MouseEventArgs e)
{
Chart chart1 = sender as Chart;
//右键恢复事件
if (e.Button == MouseButtons.Right)
{
chart1.ChartAreas[0].AxisX.ScaleView.ZoomReset(Math.Max(cutterDatas.Count, stateList.Count) / 2);
}
else if (e.Button == MouseButtons.Left)
{
SetScaleViewSize(chart1);
}
}
鼠标框选放大后我用Timer定时器读取 ScaleView.Size,然后设置X时间轴 标签类型和间隔
private void SetScaleViewSize(Chart chart) {
/*适用于鼠标框选放大*/
double size = chart.ChartAreas[0].AxisX.ScaleView.Size;
LogTool.D("SetScaleView.Size: " + size);
if (double.IsNaN(size))
{
chart.ChartAreas[0].AxisX.LabelStyle.IntervalType = DateTimeIntervalType.Hours;
chart.ChartAreas[0].AxisX.LabelStyle.Interval = 1;
return;
}
if (size < 0.00005)
{
chart.ChartAreas[0].AxisX.LabelStyle.IntervalType = DateTimeIntervalType.Seconds;
chart.ChartAreas[0].AxisX.LabelStyle.Interval = 1;
}
else if (size <= 0.0001)
{
chart.ChartAreas[0].AxisX.LabelStyle.IntervalType = DateTimeIntervalType.Seconds;
chart.ChartAreas[0].AxisX.LabelStyle.Interval = 5;
}
else if (size <= 0.0075)
{
chart.ChartAreas[0].AxisX.LabelStyle.IntervalType = DateTimeIntervalType.Seconds;
chart.ChartAreas[0].AxisX.LabelStyle.Interval = 10;
}
else if (size <= 0.001)
{
chart.ChartAreas[0].AxisX.LabelStyle.IntervalType = DateTimeIntervalType.Seconds;
chart.ChartAreas[0].AxisX.LabelStyle.Interval = 15;
}
else if (size <= 0.075)
{
chart.ChartAreas[0].AxisX.LabelStyle.IntervalType = DateTimeIntervalType.Seconds;
chart.ChartAreas[0].AxisX.LabelStyle.Interval = 30;
}
else if (size <= 0.05)
{
chart.ChartAreas[0].AxisX.LabelStyle.IntervalType = DateTimeIntervalType.Minutes;
chart.ChartAreas[0].AxisX.LabelStyle.Interval = 1;
}
else if (size <= 0.025)
{
chart.ChartAreas[0].AxisX.LabelStyle.IntervalType = DateTimeIntervalType.Minutes;
chart.ChartAreas[0].AxisX.LabelStyle.Interval = 5;
}
else if (size <= 0.1)
{
chart.ChartAreas[0].AxisX.LabelStyle.IntervalType = DateTimeIntervalType.Minutes;
chart.ChartAreas[0].AxisX.LabelStyle.Interval = 10;
}
if (size <= 0.25)
{
chart.ChartAreas[0].AxisX.LabelStyle.IntervalType = DateTimeIntervalType.Minutes;
chart.ChartAreas[0].AxisX.LabelStyle.Interval = 15;
}
}
运行结果及详细报错内容
首次加载获取到的 ScaleView.Size = NaN，标签能正常加载。
第一次框选放大也可以显示标签，第二次三次框选放大后就不显示时间轴标签了。
我的解答思路和尝试过的方法，不写自己思路的，回答率下降 60%
用定时器实时读取 ，但也不能显示标签。
double size = chart.ChartAreas[0].AxisX.ScaleView.Size;
LogTool.D("SetScaleView.Size: " + size);
我想要达到的结果，如果你需要快速回答，请尝试 “付费悬赏”
每次框选局部放大都能按照 SetScaleViewSize函数设置 显示标签。
应该是标签太密了
你用的到底是个什么控件，dev吗
- 这篇文章讲的很详细，请看：C# Chart控件实现柱形图和折线图在一个chart上同时显示，并显示滚动条