Recent changes to bugs

Red Cross instead of plot

v_decadence — Fri, 22 Nov 2013 16:31:54 -0000

Hello.
Sometimes after plot.Refresh() I get red cross instead of plot. After some searches I found that it's way how WinForms handles uncaught exception in event handlers of Control Paint event. The main problem is red cross never disappears while program is running. Only restart helps, but it's not an option. Before cross appears I get error message box with text "Error: No X-Axis specified". I found out this exception is thrown in file PlotSurface2D.cs on 752 line.
Interesting thing that one PC (with Visual Studio 2008 F5 Run) hasn't this error, but two other (when I just run .exe) have. Sometimes the same exception appears with text "Error: No Y-Axis specified". My code doesn't produce uncaught exceptions. Can somebody help me?

P.S. Sorry for my English.

Converting to VS2010 errors

Bernhard Ege — Tue, 20 Mar 2012 13:26:22 -0000

I was trying NPlot to see if we can use it, but upon loading it into VS2010 (after installing .NET 1.1 including SDK and MSBee), the build errors with these errors:

Warning 3 Use command line option '/keyfile' or appropriate project settings instead of 'AssemblyKeyFile' C:\Users\xxx\Documents\Visual Studio 2010\Projects\nplot-0.9.10.0\src\AssemblyInfo.cs 46 12 NPlot
Warning 1 The parent file, '..\src\Windows.PlotSurface2D.cs', for file 'resources\Windows.PlotSurface2D.resx' cannot be found in the project file. NPlot
Error 2 Cryptographic failure while signing assembly 'C:\Users\xxx\Documents\Visual Studio 2010\Projects\nplot-0.9.10.0\obj\Debug\NPlot.dll' -- 'Error reading key file 'NPlot-key.snk' -- The system cannot find the file specified. ' NPlot
Warning 4 'NPlot.Windows.PlotSurface2D.Padding' hides inherited member 'System.Windows.Forms.Control.Padding'. Use the new keyword if hiding was intended. C:\Users\xxx\Documents\Visual Studio 2010\Projects\nplot-0.9.10.0\src\Windows.PlotSurface2D.cs 447 14 NPlot

I am not sure how to fix any of these errors. :-/

VerticalMultiGuideline

Arvind — Sun, 21 Aug 2011 05:03:09 -0000

The NPlot documentation page has a reference to 'VerticalMultiGuideline' which is supposedly introduced to coordinate vertical guidlines across multiple plot surfaces. However, I cannot seem to find this in the 0.9.10 binaries. Can someone help me where VerticalMultiGuideline is implemented?

windows forms c# tutorial has been hijacked

Anonymous — Sun, 19 Sep 2010 19:52:33 -0000

Looks like someone is using the wiki as a way to spam.

VS2010 removes reference to Nplot, then errors:

John Allwork — Mon, 28 Jun 2010 17:22:07 -0000

VS2010 removes reference to Nplot, then errors:
1. the namespace name Nplot could not be found
2. The referenced assembly 'Nplot' could not be resolved because it has a dependency on 'System.Design
Version 4.0.0.0, ... ' which is not in the current targeted framework .NETFramework 4.0, ...

To reproduce this
1. start a new (c#) project
2. Add a Plotsurface to the toolbox (not really necessary)
3. add reference to NPlot in solution explorer (right-click, browse for Nplot dll)
4. add 'using NPlot;' at top of code
5. start typing some npolt code (say after InitializeComponent();): PlotSurface2D ps2d = new PlotSurface2D();
6. Note that intellisense knows about the Nplot items
7. Compile code and get error.
8.Look at code - PlotSurface2D ps2d = new PlotSurface2D(); is now an error.

Further
double click Nplot in Solution Explorer to display Object Browser. Nplot is missing.
Remove Nplot from references and add again. Nplot appears in Object Browser.
Compile program and Hey Presto! Nplot is gone.

Should there be a different nplot.dll for VS2010?
How do I target VS2010 for a different .NET framework?

Regards and thanks

John Allwork

Export to Bitmap / Printer

Anonymous — Thu, 03 Jun 2010 12:55:33 -0000

I have a problem when I export Plotsorfaces to Bitmap:
the text on the axis is very blurred, and the lines and bars on the plot look very fuzzy, compared to the
same plot against the sceen. Attached is a PDF with lots of charts, all of them look much better on the
screen.

This is the code (in fragments) I use:

NPlot.Bitmap.PlotSurface2D plotSurfaceBitmap = new NPlot.Bitmap.PlotSurface2D (width, height);
Draw_Chart (plotSurfaceBitmap,width,height);
plotSurfaceBitmap.BackColor = Color.White; // Color Outside the plot.
plotSurfaceBitmap.Refresh ();
Bitmap bitmap = plotSurfaceBitmap.Bitmap;

The Bitmap gets saved and printed.

cookieless

Anonymous — Tue, 22 Dec 2009 18:00:13 -0000

In the web.config of ASP Web Applicaion project, if I set <sessionState cookieless="true" />, then NPlot.Web.PlotSurface2D just show a red "X" on the page.

.Refresh().method crashes - Still crashes

Anonymous — Thu, 17 Dec 2009 12:12:28 -0000

I would like to continue my latest thread, which was closed. It can be found with this link:
http://sourceforge.net/tracker/?func=detail&aid=2915404&group_id=161868&atid=821568

Thanks Jamcquay for your response, but your code didn't work. Have you any other suggestion how I shall solve this?

Here is my current code with your code response.

// Generate data samples each second
void runTimeLogger_Tick(object sender, EventArgs e)
{
xAxis.Add(counter++); // Generate a data sample to the X-axis
yAxis.Add((1.5 + Math.Sin((double)counter * 0.2))); // Generate a data sample to the Y-axis - This will create a sine-curve for the Y-axis
this.Invoke(new MethodInvoker(delegate() { UpdateGraph(); }));
}

// Update the display of the Nplot-graph
private void UpdateGraph()
{
Grid grid = new NPlot.Grid();
grid.VerticalGridType = Grid.GridType.Coarse;
grid.HorizontalGridType = Grid.GridType.Coarse;
grid.MajorGridPen = new Pen(Color.LightGray, 1.0f);

plotGraph.Add(grid);
StepPlot stepPlot = new StepPlot();
stepPlot.Pen = new Pen(Color.Red, 2);

stepPlot.AbscissaData = xAxis;
stepPlot.DataSource = yAxis;

plotGraph.Add(stepPlot);
plotGraph.Refresh(); // This row causes the program to crash!!! (Argument Out Of Range Exception)
}

.Refresh().method crashes

Anonymous — Wed, 16 Dec 2009 09:10:08 -0000

I'm working on a dynamic graph that shall display the value of a temperature or a level sensor in runtime.
My program is logging values into two collections. Each collection is put into the PlotSurface object's X-axis and Y-axis. This is done each second.

But I'm having trouble with the .Refresh()-method. The method causes an Argument out of range exception to be thrown. The exception's message is (translated from Swedish to English):

"Index was outside the range. It may not be negative and must be less than the crowd size. Parameter name: index"

If I debug the program with a breakpoint on the .Refresh()-method instruction and press the "step into"-button the program doesn't not crash! I can then remove the breakpoint and run the program in run-mode instead with no crashes. If I just run the program without the breakpoint, it will crash.

This is very strange and I can't understand why this is happening. I'll attach my entire Windows Form Application as a .RAR-file

DateTimeAxis LargeTickStep Issue

Anonymous — Thu, 19 Nov 2009 21:50:55 -0000

First, thanks for creating such a wonderful library! It has simplified my life a million times over.

Second, I am having an issue with the LargeTickStep property of a DateTimeAxis when used in C#. If I set it to anything (other than new TimeSpan(0)) I lose my axis ticks & axis value labels and my axis label is moved above the axis (it is shown under when LargeTickStep is 0). A couple of lines of code:

NPlot.DateTimeAxis xAx1 = new NPlot.DateTimeAxis(lstDates[0], lstDates[lstDates.Count - 1]);
xAx1.LargeTickStep = new TimeSpan(10,0,0,0);
xAx1.TicksLabelAngle = 90.0f;
xAx1.TickTextNextToAxis = false;
xAx1.FlipTicksLabel = true;
graphfrm.m_psGraph.XAxis1 = xAx1;

Thanks for your consideration and thanks again for such a great library.