I am creating a C# visual studio forms application that uses zedgraph to chart the data that the program collects but I am running into the following issue when plotting the data:
My y-axis values are usually in the 100,000+ range so when zed graph plots the value it labels the y-axis labels with stuff like 0, 10, 15, 20, 25 and then on the y-axis label it will append "(10^3)" to the title and will plot the values accordingly. What I want to do is have it label the y-axis either with values like 0, 10,000, 15,000, 20,000 etc or 0, 10k, 15k, 20k and so on and not have it adjust the y-axis title.
I tried setting YAxis.Scale.MajorStep = double.Parse("10000"); but the only effect that has is to add a ton of more tick lines on the y-axis but no other effect. Here is my code that graphs the data:
private void createGraph()
{
GraphPane myPane = zdc_graph.GraphPane;
myPane.CurveList.Clear();
myPane.GraphObjList.Clear();
myPane.Title.Text = this.monitoredHost.hostName + "\nWorkState[" +
this.monitoredHost.currentWorkState + "]";
myPane.XAxis.Title.Text = "";
myPane.YAxis.Title.Text = "OPS Per Second";
myPane.YAxis.Scale.FontSpec.FontColor = Color.Blue;
myPane.YAxis.Title.FontSpec.FontColor = Color.Blue;
myPane.YAxis.Scale.MaxAuto = true;
myPane.Y2Axis.Title.Text = "Reading";
myPane.Y2Axis.IsVisible = true;
myPane.Y2Axis.Scale.FontSpec.FontColor = Color.Red;
myPane.Y2Axis.Title.FontSpec.FontColor = Color.Red;
myPane.XAxis.Type = AxisType.Date;
myPane.XAxis.Scale.Format = "T";
myPane.XAxis.Scale.MajorUnit = DateUnit.Second;
myPane.YAxis.Scale.Min = 0;
myPane.YAxis.Scale.MajorStep = double.Parse("10000");
myPane.Y2Axis.Scale.Min = 0;
LineItem kpiCurve = myPane.AddCurve("OPS Per Second",
this.monitoredHost.graphKpiList,
Color.Blue,SymbolType.Circle);
LineItem pwrCurve = myPane.AddCurve("Reading",
this.monitoredHost.graphPwrList, Color.Red,
SymbolType.Circle);
kpiCurve.Line.Width = 2.0F;
kpiCurve.Symbol.Size = 4.0F;
kpiCurve.Symbol.Fill = new Fill(Color.White);
pwrCurve.Line.Width = 2.0F;
pwrCurve.Symbol.Size = 4.0F;
pwrCurve.Symbol.Fill = new Fill(Color.White);
pwrCurve.IsY2Axis = true;
myPane.Chart.Fill = new Fill(Color.White, Color.FromArgb(255, 255, 210), -45F);
zdc_graph.AxisChange();
zdc_graph.Refresh();
}
I hope this makes sense. Thanks for the help.
ZedGraph is attempting to detect magnitude and simplify the graph. You can turn this off with the following:
myPane.YAxis.Scale.MagAuto = false;
This will result in y-axis labels like 100000.
If you want to format the label with a separator comma like 100,000:
myPane.YAxis.Scale.Format = "#,#";
Finally, if you prefer to show 100k, you'll need to subscribe to the ScaleFormatEvent and return your own format, like this:
myPane.YAxis.ScaleFormatEvent += new Axis.ScaleFormatHandler(YAxis_ScaleFormatEvent);
string YAxis_ScaleFormatEvent(GraphPane pane, Axis axis, double val, int index)
{
return String.Format("{0}k", val / 1000);
}
I am having similar problem. So applying your method it works on the application but i also want to print out the graph in a PDF file (using MigraDoc) but it does work.
public Bitmap printGraphPane()
{
ZedGraphControl graph = new ZedGraphControl();
GraphPane newGP = myPane.GraphPane;
//newGP.YAxis.Scale.Mag = 0;
//newGP.YAxis.Scale.Format = "#";
//newGP.YAxis.ScaleFormatEvent += new Axis.ScaleFormatHandler(YAxis_ScaleFormatEvent);
Bitmap bit = new Bitmap(newGraph.Width, newGraph.Height);
newGraph.ClientSize = bit.Size;
newGraph.DrawToBitmap(bit, new Rectangle(0, 0, newGraph.Width, newGraph.Height));
return bit;
}
Related
I'm using System.Web.UI.DataVisualization. Charting to create charts in MVC.
I have a chart displaying values in a StackedColumn100 SeriesChartType with the corresponding y-axis values on the primary y-axis on the left side.
Since it is a 100% stacked column series, the primary y-axis is scaled from 0 to 100.
I have then added a secondary series in the form of a Line SeriesChartType tied to a secondary axis (on the right side). I would like this axis to adjust its scale based on the values in the series but it doesn't. No matter what the highest value of this series is, the secondary y-axis also has a scale between 0 to 100.
If I manually set the maximum value for the secondary y-axis the following way:
chart.ChartAreas[0].AxisY2.Maximum = 20;. It works but I don't want to do that since the maximum value can differ greatly based on the search criteria used.
I have really tried to find a solution for this but I can't. According to the documentation and samples it seems that the scale should be based on the series values but I don't get it to work that way. Any help would be greatly appreciated!
Below is a stand alone test function that recreates the problem. I call the function from my view with the following line:
<p><img src="#Url.Action("CreateChart_TestSecondaryAxis")" /> </p>
public FileResult CreateChart_TestSecondaryAxis()
{
System.Web.UI.DataVisualization.Charting.Chart chart = new System.Web.UI.DataVisualization.Charting.Chart();
chart.Width = 800;
chart.Height = 400;
chart.BackColor = Color.FromArgb(211, 223, 240);
chart.BorderlineDashStyle = ChartDashStyle.Solid;
chart.BackSecondaryColor = Color.White;
chart.BackGradientStyle = GradientStyle.TopBottom;
chart.BorderlineWidth = 1;
chart.Palette = ChartColorPalette.BrightPastel;
chart.BorderlineColor = Color.FromArgb(26, 59, 105);
chart.RenderType = RenderType.BinaryStreaming;
chart.BorderSkin.SkinStyle = BorderSkinStyle.Emboss;
chart.AntiAliasing = AntiAliasingStyles.All;
chart.TextAntiAliasingQuality = TextAntiAliasingQuality.Normal;
ChartArea chartArea = new ChartArea();
chartArea.Name = "TestSecondaryAxis";
chartArea.BackColor = Color.Transparent;
chartArea.AxisX.IsLabelAutoFit = false;
chartArea.AxisY.IsLabelAutoFit = false;
chartArea.AxisX.LabelStyle.Font =
new Font("Verdana,Arial,Helvetica,sans-serif",
8F, FontStyle.Regular);
chartArea.AxisY.LabelStyle.Font =
new Font("Verdana,Arial,Helvetica,sans-serif",
8F, FontStyle.Regular);
chartArea.AxisY.LineColor = Color.FromArgb(64, 64, 64, 64);
chartArea.AxisX.LineColor = Color.FromArgb(64, 64, 64, 64);
chartArea.AxisY.MajorGrid.LineColor = Color.FromArgb(64, 64, 64, 64);
chartArea.AxisX.MajorGrid.LineColor = Color.FromArgb(64, 64, 64, 64);
chartArea.AxisX.Title = "Airport";
chartArea.AxisY.Title = "LandingConf";
chartArea.AxisY.TextOrientation = TextOrientation.Rotated270;
chartArea.AxisX.LabelStyle.IsEndLabelVisible = true;
chart.ChartAreas.Add(chartArea);
Series seriesPrimaryAxisConf3 = new Series();
seriesPrimaryAxisConf3.Name = "Conf 3";
seriesPrimaryAxisConf3.IsValueShownAsLabel = false;
seriesPrimaryAxisConf3.Color = Color.Blue;
seriesPrimaryAxisConf3.ChartType = SeriesChartType.StackedColumn100;
seriesPrimaryAxisConf3.BorderWidth = 2;
seriesPrimaryAxisConf3.ChartArea = "TestSecondaryAxis";
DataPoint point;
for (int i = 1; i < 11; i++)
{
point = new DataPoint();
point.AxisLabel = "Airport" + i.ToString();
point.YValues = new double[] { i };
seriesPrimaryAxisConf3.Points.Add(point);
}
chart.Series.Add(seriesPrimaryAxisConf3);
Series seriesPrimaryAxisConfFull = new Series();
seriesPrimaryAxisConfFull.Name = "Conf Full";
seriesPrimaryAxisConfFull.IsValueShownAsLabel = false;
seriesPrimaryAxisConfFull.Color = Color.Red;
seriesPrimaryAxisConfFull.ChartType = SeriesChartType.StackedColumn100;
seriesPrimaryAxisConfFull.BorderWidth = 2;
seriesPrimaryAxisConfFull.ChartArea = "TestSecondaryAxis";
for (int i = 1; i < 11; i++)
{
point = new DataPoint();
point.AxisLabel = "Airport" + i.ToString();
point.YValues = new double[] { 11-i };
seriesPrimaryAxisConfFull.Points.Add(point);
}
chart.Series.Add(seriesPrimaryAxisConfFull);
Series seriesSecondaryAxisNoOfFlights = new Series();
seriesSecondaryAxisNoOfFlights.Name = "NoOfFLights";
seriesSecondaryAxisNoOfFlights.IsValueShownAsLabel = false;
seriesSecondaryAxisNoOfFlights.Color = Color.Red;
seriesSecondaryAxisNoOfFlights.ChartType = SeriesChartType.Line;
seriesSecondaryAxisNoOfFlights.BorderWidth = 2;
seriesSecondaryAxisNoOfFlights.ChartArea = "TestSecondaryAxis";
for (int i = 1; i < 11; i++)
{
point = new DataPoint();
point.AxisLabel = "Airport" + i.ToString();
point.YValues = new double[] { i };
seriesSecondaryAxisNoOfFlights.Points.Add(point);
}
chart.Series.Add(seriesSecondaryAxisNoOfFlights);
chart.Series["NoOfFLights"].YAxisType = AxisType.Secondary;
chart.ChartAreas["TestSecondaryAxis"].AxisY2.LineColor = Color.Transparent;
chart.ChartAreas["TestSecondaryAxis"].AxisY2.MajorGrid.Enabled = false;
chart.ChartAreas["TestSecondaryAxis"].AxisY2.MajorTickMark.Enabled = false;
MemoryStream ms = new MemoryStream();
chart.SaveImage(ms);
return File(ms.GetBuffer(), #"image/png");
}
MSChart is a nice control but unfortunately Microsoft has always failed to properly document it.
And with the latest changes at MSDN things have gone from bad to worse, so I can't actually point to the rules that go for the various ChartTypes.
In your case I deduct this (rather wacky) rule:
To attach a non 100%-series to an indepently scaled secondary y-axis
it must be the first series but the stacked series still must be added
first.
So, if you want to get a result like this:
..you need to adapt the code. Here are the changes and additions needed..:
First we have to insert the line series at the front but do that after the stack100 series have beeen added..:
chart.Series.Insert(0, seriesSecondaryAxisNoOfFlights); // instead of adding it
Next we need to owner-draw the line as it would get burried under the columns otherwise.
Code the PostPaint event like this:
private void Chart_PostPaint(object sender, ChartPaintEventArgs e)
{
Chart chart = sender as Chart; //*
Series s = chart.Series[0]; // make sure to pick the right one!
Axis ax = chart.ChartAreas[0].AxisX;
Axis ay = chart.ChartAreas[0].AxisY2; // !!
var pts = s.Points.Select(x =>
new PointF((float)ax.ValueToPixelPosition(x.XValue),
(float)ay.ValueToPixelPosition(x.YValues[0])));
using (Pen pen = new Pen(s.Color, s.BorderWidth))
e.ChartGraphics.Graphics.DrawLines(pen, pts.ToArray());
}
For this to work the series need valid x-values. So add this line:
point.XValue = i; // set both x and y-values!
I also added a few nudges to the axis positioning:
ChartArea ca = chart.ChartAreas["TestSecondaryAxis"];
ca.AxisY.Maximum = 100;
ca.AxisX.Minimum = 0.5;
ca.AxisX.IntervalOffset = 0.5;
I want to add text(say, annotations) in MS chart(winforms) like (10, 20) , (30, 40) where I already have a scroll bar.
I can able to draw strings(graphics.drawstring) in Chart, but on scrolling the horizontal scroll bar, the text which I have drawn remains static and immovable.
On scrolling the scrollbar, the text which I have drawn also should move along with my horizontal scrolling.
My code follows:
chart2.BorderSkin.SkinStyle = BorderSkinStyle.Emboss;
chart2.BorderlineColor = System.Drawing.Color.FromArgb(26, 59, 105);
chart2.BorderlineWidth = 3;
chart2.BackColor = Color.White;
chart2.ChartAreas.Add("chtArea");
chart2.ChartAreas[0].AxisX.Title = "Category Name";
chart2.ChartAreas[0].AxisX.TitleFont =
new System.Drawing.Font("Verdana", 11, System.Drawing.FontStyle.Bold);
chart2.ChartAreas[0].AxisY.Title = "UnitPrice";
chart2.ChartAreas[0].AxisY.TitleFont =
new System.Drawing.Font("Verdana", 11, System.Drawing.FontStyle.Bold);
chart2.ChartAreas[0].BorderDashStyle = ChartDashStyle.Solid;
chart2.ChartAreas[0].BorderWidth = 2;
chart2.ChartAreas["chtArea"].AxisX.ScrollBar.Enabled = true;
chart2.ChartAreas["chtArea"].CursorX.IsUserEnabled = true;
chart2.ChartAreas["chtArea"].CursorX.IsUserSelectionEnabled = true;
chart2.ChartAreas["chtArea"].AxisX.ScaleView.Zoomable = false;
chart2.ChartAreas["chtArea"].AxisX.ScrollBar.IsPositionedInside = true;
chart2.ChartAreas["chtArea"].AxisX.ScaleView.Size = 20;
chart2.ChartAreas[0].AxisX.ScaleView.SmallScrollSizeType = DateTimeIntervalType.Seconds;
chart2.ChartAreas[0].AxisX.ScaleView.SmallScrollSize = 1;
chart2.Legends.Add("UnitPrice");
chart2.Series.Add("UnitPrice");
chart2.Series[0].ChartType = SeriesChartType.Line;
Random rand = new Random();
var valuesArray = Enumerable.Range(0, 500).Select(x => rand.Next(0, 100)).ToArray();
for (int i = 0; i < 500; i++)
{
chart2.Series["UnitPrice"].Points.AddXY(i+10, valuesArray[i]);
}
I tried TextAnnotaions, Line annotations, etc Nothing helped me.
Then I tried drawing dynamic labels inside MS chart also. Labels remain immovable while scrolling horizontal scroll bar.
This code works perfectly in your machine also.
Sounds a lot as if you want to add TextAnnotations.
If you want them to stick with your data points you should anchor them to the points they shall stay with.
Here are a few examples:
// directly anchored to a point
TextAnnotation TA1 = new TextAnnotation();
TA1.Text = "DataPoint 222";
TA1.SetAnchor(chart2.Series["UnitPrice"].Points[222]);
chart2.Annotations.Add(TA1);
// anchored to a point but shifted down
TextAnnotation TA2 = new TextAnnotation();
TA2.Text = "DataPoint 111";
TA2.AnchorDataPoint = chart2.Series["UnitPrice"].Points[111];
TA2.AnchorY = 0;
chart2.Annotations.Add(TA2);
// this one is not anchored on a point:
TextAnnotation TA3 = new TextAnnotation();
TA3.Text = "At 50% width BC";
TA3.AnchorX = 50; // 50% of chart width
TA3.AnchorY = 20; // 20% of chart height, from top!
TA3.Alignment = ContentAlignment.BottomCenter; // try a few!
chart2.Annotations.Add(TA3);
By default they either anchor to DataPoints or are positioned in % of the chart size.
It is also possible to set the positions according to pixel coordinates, but for this you need to calculate the positions each time the chart changes its view!
See here for an example how to transform chart data positions to chart control coordinates and vice versa.. (Not really recommended, though)
Currently I am using ZedGraph to display my curve. I want to mark the particular regions of the curve over the ZedGraph control and label it like follows.
Note: I need different type of markings in the X and Y axis based on the text size.
Thanks for your help in advance.
You have two options,
1) Use BoxObject to draw at a specific region as follows
and you can use the source code as follows:
private void Form1_Load(object sender, EventArgs e)
{
// Create an instance of Graph Pane
GraphPane myPane = zedGraphControl1.GraphPane;
// Build a PointPairList with points based on Sine wave
PointPairList list = new PointPairList();
for (double i = 0; i < 36; i++)
{
double x = i * 10.0 + 50.0;
double y = Math.Sin(i * Math.PI / 15.0) * 16.0;
list.Add(x, y);
}
// Hide the legend
myPane.Legend.IsVisible = false;
// Add a curve
LineItem curve = myPane.AddCurve("label", list, Color.Red, SymbolType.Circle);
curve.Line.Width = 1.5F;
curve.Symbol.Fill = new Fill(Color.White);
curve.Symbol.Size = 5;
// Make the XAxis start with the first label at 50
myPane.XAxis.Scale.BaseTic = 50;
// Fill the axis background with a gradient
myPane.Chart.Fill = new Fill(Color.White, Color.SteelBlue, 45.0F);
// Draw Region 1
drawRegion(list[0].X, list[10].X,"Positive Cycle");
// Calculate the Axis Scale Ranges
zedGraphControl1.AxisChange();
// Refresh to paint the graph components
Refresh();
}
private void drawRegion(double xMin, double xMax, string regName)
{
GraphPane pane = zedGraphControl1.GraphPane;
BoxObj box = new BoxObj(xMin,20, xMax, 40.0, Color.Empty, Color.LightSteelBlue);// Color.FromArgb(225, 245, 225));
box.Location.CoordinateFrame = CoordType.AxisXYScale;
box.Location.AlignH = AlignH.Left;
box.Location.AlignV = AlignV.Top;
// place the box behind the axis items, so the grid is drawn on top of it
box.ZOrder = ZOrder.E_BehindCurves;//.D_BehindAxis;//.E_BehindAxis;
pane.GraphObjList.Add(box);
// Add Region text inside the box
TextObj myText = new TextObj(regName, 160, -15);
myText.Location.CoordinateFrame = CoordType.AxisXYScale;
myText.Location.AlignH = AlignH.Right;
myText.Location.AlignV = AlignV.Center;
myText.FontSpec.IsItalic = true;
myText.FontSpec.IsBold = false;
myText.FontSpec.FontColor = Color.Red;
myText.FontSpec.Fill.IsVisible = false;
myText.FontSpec.Border.IsVisible = false;
pane.GraphObjList.Add(myText);
zedGraphControl1.Refresh();
}
2) This is a bit difficult but do-able, Draw individual vertical lines discussed here: 1, 2 and add the required text etc.
I suggest you to use the option 1, which is lot easier than 2 !
I have a charting application that has an overlay function which reassigns the 'from' chart series to the 'to' chart using this code :
chTo.Series.Add(chFrom.Series[s]); //Reassign series to new chart
chTo.Legends.Add(chFrom.Legends[s]); //Reassign legend to new chart
Works great. However, I am trying to implement tooltips for the legends and am running into an issue where only the first legend in the chart will show tooltips. When I do a hittest only the first legend is recognized. All subsequent legends, while visible on the chart, aren't 'seen' to the hittest method. I'm thinking this is why the tooltips aren't showing as there is no object to trigger the mouseover event for the tooltip.
I have been unable to find a way to 'expand' the legend area (as detected by the hittest method) to make this work.
Does anyone have any ideas? Thanks!
Responding to King King --
The original legend is created in the same method as the chart thus:
//Create the series legend
chartSel.Series[ySeries.Name].ChartArea = "ChartArea1";
chartSel.Legends.Remove(chartSel.Legends.FindByName("Legend1"));
chartSel.Legends.Add(ySeries.Name);
chartSel.Legends[0].Name = ySeries.Name;
//Format the series legend
chartSel.Legends[ySeries.Name].Docking = Docking.Right;
chartSel.Legends[ySeries.Name].DockedToChartArea = "ChartArea1";
chartSel.Legends[ySeries.Name].Alignment = StringAlignment.Near;
chartSel.Legends[ySeries.Name].IsDockedInsideChartArea = false;
chartSel.Legends[ySeries.Name].LegendStyle = LegendStyle.Table; //.Row;
chartSel.Legends[ySeries.Name].TableStyle = LegendTableStyle.Tall;
chartSel.Legends[ySeries.Name].IsEquallySpacedItems = false;
chartSel.Legends[ySeries.Name].Font = new Font("Segoe UI", 7, FontStyle.Bold);
//chartSel.Legends[ySeries.Name].TextWrapThreshold = 17; // 19;
chartSel.Legends[ySeries.Name].Position.Auto = false;
chartSel.Legends[ySeries.Name].Position.X = 80;
chartSel.Legends[ySeries.Name].Position.Y = 2;
chartSel.Legends[ySeries.Name].Position.Width = 18;
chartSel.Legends[ySeries.Name].Position.Height = 12;
//Format series data point value cell
chartSel.Legends[ySeries.Name].CellColumns.Add(new LegendCellColumn("", LegendCellColumnType.Text, ""));
chartSel.Legends[ySeries.Name].CellColumns[0].Alignment = ContentAlignment.MiddleLeft; //.TopLeft;
chartSel.Legends[ySeries.Name].CellColumns[0].Margins = new System.Windows.Forms.DataVisualization.Charting.Margins(10, 10, 1, 1);
chartSel.Legends[ySeries.Name].CellColumns[0].MinimumWidth = 500;
chartSel.Legends[ySeries.Name].CellColumns[0].MaximumWidth = 500;
chartSel.Legends[ySeries.Name].CellColumns[0].BackColor = Color.FromArgb(120, chartSel.Series[ySeries.Name].Color);
//Format legend cell spacer
chartSel.Legends[ySeries.Name].CellColumns.Add(new LegendCellColumn("", LegendCellColumnType.Text, ""));
chartSel.Legends[ySeries.Name].CellColumns[1].Alignment = ContentAlignment.TopLeft;
chartSel.Legends[ySeries.Name].CellColumns[1].Margins = new System.Windows.Forms.DataVisualization.Charting.Margins(0, 0, 0, 0);
chartSel.Legends[ySeries.Name].CellColumns[1].MinimumWidth = 25;
chartSel.Legends[ySeries.Name].CellColumns[1].MaximumWidth = 25;
chartSel.Legends[ySeries.Name].CellColumns[1].BackColor = Color.Black;
//Format series title cell
chartSel.Legends[ySeries.Name].CellColumns.Add(new LegendCellColumn("", LegendCellColumnType.Text, ySeries.Name));
chartSel.Legends[ySeries.Name].CellColumns[2].Alignment = ContentAlignment.MiddleLeft;
chartSel.Legends[ySeries.Name].CellColumns[2].Margins = new System.Windows.Forms.DataVisualization.Charting.Margins(0, 0, 1, 1);
chartSel.Legends[ySeries.Name].CellColumns[2].MinimumWidth = 1475; //1500;
chartSel.Legends[ySeries.Name].CellColumns[2].MaximumWidth = 1475; //1500;
chartSel.Legends[ySeries.Name].CellColumns[2].ToolTip = ySeries.Name;
After the series and legends have been reassigned (using the code in my original post) I then set the legend values based on the cursor position located by the following hittest in response to a mouse-down event:
pt = activePanel.PointToClient(Control.MousePosition);
ch = activePanel.GetChildAtPoint(pt) as Chart;
if (ch != null)
{
HitTestResult ht = ch.HitTest(e.X, e.Y, false);
if (ht.ChartElementType == ChartElementType.PlottingArea)
{
SetLegendValueText(ht, ch);
}
}
private void SetLegendValueText(HitTestResult ht, Chart ch)
{
//Get the datapoint 'x' index value
int dpIndex = 0;
if (ht != null)
{
switch (ht.ChartElementType)
{
case ChartElementType.DataPoint: //Cursor is on a series line
DataPoint dp = ht.Object as DataPoint;
if (dp != null)
{
dpIndex = ht.PointIndex;
}
break;
case ChartElementType.PlottingArea: //Cursor is somewhere in the plot area of the chart
dpIndex = (int)ht.ChartArea.CursorX.Position;
break;
}
}
//Set legend value and legend tooltip
for (int x = 0; x < ch.Legends.Count; x++) //foreach (Series s in ch.Series)
{
if (dpIndex > 0)
{
ch.Legends[x].Name = "Legend_" + x;
ch.Legends[x].CellColumns[0].Text = ch.Series[x].Points[dpIndex - 1].YValues[0].ToString();
ch.Legends[x].CellColumns[0].ToolTip = ch.Legends[x].CellColumns[0].Text;
}
}
}
So, I end up with the legends looking the way I want them, but the tooltips only show for the first legend item. I've tried to do custom items as well. With them I get the tooltips, but I lose the formatting. This has been driving me crazy for weeks (off and on) and I would really like to move on to other issues. Clearly (to me anyway), I am not doing something right simply because I don't know everything there is to know about the charts, and the MSChart Samples are of very limited benefit.
I'd be most grateful if I could be pointed in the right direction.
This may be simple, but I'm unable to figure it out. I have a linear graph for each of the OS performance counters (Y->value, x->Time). Now I want to add a straight horizontal line for a threshold Y value in, say, Red so that it shows in the graph along with the actual data. I already know the threshold value for each of my counters.
How do I do this?
I currently do this to show a perfcounter in its own tabPage:
Cursor = Cursors.WaitCursor;
var perfCounter = PerfDictValues.Value.First(pc => pc.Counter == counter);
var tPage = new TabPage((tabControl1.TabPages.Count + 1).ToString());
tPage.Tag = perfCounter;
tPage.Padding = new Padding { All = 8 };
var zedGraph = new ZedGraphControl();
zedGraph.Dock = DockStyle.Fill;
var graphPane = zedGraph.GraphPane;
graphPane.Title.Text = counter;
graphPane.XAxis.Title.Text = String.Format("Max: {0}, Min: {1}, Avg: {2}", perfCounter.Maxm, perfCounter.Min, perfCounter.Average);
var curve = graphPane.AddCurve(counter, perfCounter.PointList, Color.Blue, SymbolType.Diamond); //Want to add a threshold value from perfCounter.Threshold property
graphPane.XAxis.Type = AxisType.Linear;
graphPane.AxisChange();
tPage.Controls.Add(zedGraph);
tabControl1.TabPages.Add(tPage);
tabControl1.SelectedTab = tPage;
grpOutput.Visible = true;
You can draw a simple red line on the graph by adding a LineObj to the GraphObj list, i.e. this draws a horizontal line
double threshHoldY = 2;
LineObj threshHoldLine = new LineObj(
Color.Red,
graphPane.XAxis.Scale.Min,
threshHoldY,
graphPane.XAxis.Scale.Max,
threshHoldY);
graphPane.GraphObjList.Add(threshHoldLine);