scalebar-problem with csharp-mapscript

[Christian Wilmes]

Hi All,

if I try to add a scalebar to my map I get exceptions.The code for the scalebar:
            labelObj labelScalebar = new labelObj();
            labelScalebar.size = 12;
            labelScalebar.type = MS_FONT_TYPE.MS_BITMAP;
            labelScalebar.color = new colorObj(255, 0, 255, 0);

            scalebarObj scalebar = new scalebarObj();
            scalebar.height = pictureBoxScalebar.Height;
            scalebar.width = pictureBoxScalebar.Width;
            scalebar.intervals = 5;
            scalebar.label = labelScalebar;
            scalebar.position = (int)MS_LABEL_POSITIONS.MS_UL;
            scalebar.style = 0; //0 or 1
            scalebar.status = mapscript.MS_EMBED;
            scalebar.units = (int)MS_UNITS.MS_KILOMETERS;

            myMap.scalebar = scalebar;






Using myMap.drawScalebar() I get the following exception:
System.ApplicationException was unhandled
  Message="msGetBitmapFont(): GD library error. Invalid bitmap font. Must be one of tiny, small, medium, large or giant."
  Source="mapscript_csharp"
  StackTrace:
       at mapObj.drawScalebar()
       at GeoDataPipelineViewer.GDPV.RefreshMap() in C:\src\Visual Studio 2005\Projects\GeoDataPipelineViewer\GeoDataPipelineViewer\GDPV.cs:line 415
       at GeoDataPipelineViewer.GDPV.showMap() in C:\src\Visual Studio 2005\Projects\GeoDataPipelineViewer\GeoDataPipelineViewer\GDPV.cs:line 385
       at GeoDataPipelineViewer.GDPV..ctor() in C:\src\Visual Studio 2005\Projects\GeoDataPipelineViewer\GeoDataPipelineViewer\GDPV.cs:line 45
       at GeoDataPipelineViewer.Program.Main() in C:\src\Visual Studio 2005\Projects\GeoDataPipelineViewer\GeoDataPipelineViewer\Program.cs:line 19
       at System.AppDomain.nExecuteAssembly(Assembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()






Using MyMap.draw() I get the following Exception:
System.AccessViolationException was unhandled
  Message="Attempted to read or write protected memory. This is often an indication that other memory is corrupt."
  Source="mapscript_csharp"
  StackTrace:
       at mapscriptPINVOKE.mapObj_draw(HandleRef jarg1)
       at mapObj.draw()
       at GeoDataPipelineViewer.GDPV.RefreshMap() in C:\src\Visual Studio 2005\Projects\GeoDataPipelineViewer\GeoDataPipelineViewer\GDPV.cs:line 400
       at GeoDataPipelineViewer.GDPV.showMap() in C:\src\Visual Studio 2005\Projects\GeoDataPipelineViewer\GeoDataPipelineViewer\GDPV.cs:line 385
       at GeoDataPipelineViewer.GDPV..ctor() in C:\src\Visual Studio 2005\Projects\GeoDataPipelineViewer\GeoDataPipelineViewer\GDPV.cs:line 45
       at GeoDataPipelineViewer.Program.Main() in C:\src\Visual Studio 2005\Projects\GeoDataPipelineViewer\GeoDataPipelineViewer\Program.cs:line 19
       at System.AppDomain.nExecuteAssembly(Assembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()


I think the problem is the label, like it is described in the first exception but how could I set the bitmap-font, and where can I find a enum for that or some constants like MS_MEDIUM?
Or is there just another reason why that doesn't work?

Best Regards
Christian



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