In ZedGraph, how do I show text labels for each point and in the XAxis all together?
If I do
myPane.XAxis.Type = AxisType.Text; myPane.XAxis.Scale.TextLabels = array_of_string;
I get labels on the XAxis like this

And if I do
for (int i = 0; i < myCurve.Points.Count; i++)
{
PointPair pt = myCurve.Points[i];
// Create a text label from the Y data value
TextObj text = new TextObj(
pt.Y.ToString("f0"), pt.X, pt.Y + 0.1,
CoordType.AxisXYScale, AlignH.Left, AlignV.Center);
text.ZOrder = ZOrder.A_InFront;
text.FontSpec.Angle = 0;
myPane.GraphObjList.Add(text);
}
I get labels on the curve, like this

But if I do both at the same time, labels on the curve disappear.
Is there a way to combine both kind of labels?
Answers:
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Method 1
I’ve changed my answer after you clarified the question.
You just have to remember to position the labels correctly:
<%
System.Collections.Generic.List<ZedGraphWebPointPair> points = new System.Collections.Generic.List<ZedGraphWebPointPair>();
for (int i = 0; i < 15; i++)
{
// Let's have some fun with maths
points.Add(new ZedGraphWebPointPair
{
X = i,
Y = Math.Pow(i - 10, 2) * -1 + 120
});
}
System.Collections.Generic.List<string> XAxisLabels = new System.Collections.Generic.List<string>();
TestGraph.CurveList.Add(new ZedGraphWebLineItem { Color = System.Drawing.Color.Red });
TestGraph.XAxis.Scale.FontSpec.Size = 9;
int j = 1;
foreach (ZedGraphWebPointPair point in points)
{
// Add the points we calculated
TestGraph.CurveList[0].Points.Add(point);
// Add the labels for the points
TestGraph.GraphObjList.Add(new ZedGraphWebTextObj
{
Location =
{
CoordinateFrame = ZedGraph.CoordType.XChartFractionYScale,
// Make sure we position them according to the CoordinateFrame
X = Convert.ToSingle(j) / points.Count - 0.05f,
Y = Convert.ToSingle(point.Y) + 3f,
AlignV = ZedGraph.AlignV.Top
},
Text = point.Y.ToString(),
FontSpec = { Angle = 90, Size = 9, Border = { IsVisible = false } }
});
// Add the labels for the XAxis
XAxisLabels.Add(String.Format("P{0}", j));
j++;
}
TestGraph.RenderGraph += delegate(ZedGraphWeb zgw, System.Drawing.Graphics g, ZedGraph.MasterPane mp)
{
ZedGraph.GraphPane gp = mp[0];
gp.XAxis.Type = ZedGraph.AxisType.Text;
gp.XAxis.Scale.TextLabels = XAxisLabels.ToArray();
};
%>
That code will produce this graph:
Method 2
If the axis type is text, the code below is easier to get x-coordinates of the points 😉
for (int tPoint = 0; tPoint < curve.Points.Count; tPoint++)
{
TextObj text = new TextObj(curve.Points[tPoint].Y.ToString(), curve.Points[tPoint].X, curve.Points[tPoint].Y + 10);
}
All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0
