VB2010使用MS图表控件:我想我的问题很基本,但还没有找到如何做的方法。当窗体第一次加载时,图表控件不显示任何内容,甚至不显示网格。当我将点加载到我的序列中时,网格加上这些点就会显示出来。
如何显示仅包含网格线的模板图表,以便用户可以看到要填充的图表。我确实尝试将两个伪点添加到我的一个系列中,然后禁用该系列以不显示这些点,但Chart控件不会将其视为呈现网格的理由。
谢谢你的帮助。
编辑:感谢@baddack给了我思考的食粮。下面是我所做的:
在表单加载时,创建一个伪造的系列。这一系列将在应用程序的生命周期中保留在图表中。
Dim srs As New Series 'create a new series
cht.Series.Add(srs) 'add series to chart
srs.ChartType = SeriesChartType.Point 'it will be a point chart with one point (or you can add several points to define your display envelope)
srs.Name = "bogus" 'name of our bogus series
srs.IsVisibleInLegend = False 'do not show the series in the legend
srs.Points.AddXY(25000, 1000) 'this will be a point in the upper-right corner of the envelope you want to display
srs.Points(0).MarkerColor = Color.Transparent 'no color for the marker
srs.Points(0).MarkerSize = 0 'no size for the marker
chtObstacles.Series("bogus").Enabled = True 'name of the bogus series
chtObstacles.Update() 'update the chart然后,当我运行我的进程时,我做的第一件事是清除所有其他序列,并启用伪序列,以便它可以用来调整“空”网格的大小。
cht.Series("srs1").Points.Clear()
cht.Series("srs2").Points.Clear()
cht.Series("bogus").Enabled = True然后运行为图表提供点的流程:
if pointCount > 0 then
'turn off the series so it will not be used in the grid sizing
cht.Series("bogus").Enabled = False
'add points to the chart
'code to add points to MS Chart
endif
cht.ChartAreas("chaMain").RecalculateAxesScale() 'we must recalculate the axes scale to reset the mins/maxs
'resume updating UI
cht.Series.ResumeUpdates()
'force redraw of chart
cht.Update()发布于 2017-07-29 05:57:56
您可以向图表中添加一个空点。这将使网格显示,但不显示任何点。
private void Form1_Load(object sender, EventArgs e)
{
chart1.Series.Clear();
SetChartAxisLines(chart1.ChartAreas[0]);
Series s = new Series();
chart1.Series.Add(s);
s.Points.Add();
s.Points[0].IsEmpty = true;
}
private void SetChartAxisLines(ChartArea ca)
{
//X-Axis
ca.AxisX.MajorGrid.LineColor = Color.DarkGray;
ca.AxisX.MajorGrid.LineDashStyle = ChartDashStyle.Dash;
ca.AxisX.MinorGrid.Enabled = true;
ca.AxisX.MinorGrid.LineColor = System.Drawing.Color.Silver;
ca.AxisX.MinorGrid.LineDashStyle = ChartDashStyle.Dot;
//Y-Axis
ca.AxisY.MajorGrid.LineColor = System.Drawing.Color.DarkGray;
ca.AxisY.MajorGrid.LineDashStyle = System.Windows.Forms.DataVisualization.Charting.ChartDashStyle.Dash;
ca.AxisY.MinorGrid.Enabled = true;
ca.AxisY.MinorGrid.LineColor = System.Drawing.Color.Silver;
ca.AxisY.MinorGrid.LineDashStyle = System.Windows.Forms.DataVisualization.Charting.ChartDashStyle.Dot;
}

https://stackoverflow.com/questions/45382522
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