[IronPython] Conflicting information with Ironpython and MapWindowGIS interop

[Dino Viehland]

My guess is you need to change:

>>> shapefile1 = MapWinGIS.Shapefile

To:

>>> shapefile1 = MapWinGIS.Shapefile()

You've just gotten a reference to the class whereas the C# code has
created an instance of that class.

> -----Original Message-----
> From: users-bounces at lists.ironpython.com [mailto:users-
> bounces at lists.ironpython.com] On Behalf Of Bruce Bromberek
> Sent: Thursday, July 01, 2010 6:22 PM
> To: Discussion of IronPython
> Subject: [IronPython] Conflicting information with Ironpython and
> MapWindowGIS interop
> 
> I'm trying to drive MapWindows GIS from an Ironpython script to
> automate some tasks.  MapWindow is in C#, and I have generated the
> Interop Assembly, and I can load the MapWinGIS namespace.
> Following this example in C#
> 
> //create a new instance for MapWinGIS.Shapefile
> //MapWinGIS.Shapefile  is a data provider for ESRI Shapefile
> MapWinGIS.Shapefile shapefile1 = new MapWinGIS.Shapefile();
> //Define the data source for MapWinGIS.Shapefile instance
> shapefile1.Open(@"D:\GISSampleData\base.shp", null );
> 
> So I did the following:
> >>> import clr
> >>> clr.AddReference('MapWindow.Interfaces')
> >>> clr.AddReference('MapWinGeoProc')
> >>> clr.AddReference('MapWinUtility')
> >>> clr.AddReference('MapWinInterfaces')
> >>> clr.AddReference('Interop.MapWinGIS')
> >>> import MapWinGIS
> >>> shapefile1 = MapWinGIS.Shapefile
> >>> help(shapefile1.Open)
> Help on method_descriptor:
> 
> Open(...)
>     Open(self, str ShapefileName, ICallback cBack) -> bool
> 
> >>> shapefile1.Open(r"G:\DLS\BAB\2010 USPS
> GIS\ADC_Layer\ADC_ALBANY_NY_120.shp",None)
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> TypeError: expected IShapefile, got str
> 
> Not being a C# master, I thought maybe I'm accessing the objects
> correctly.  Try again using IShapefile instead of Shapefile and I got
> this
> 
> >>> t = MapWinGIS.IShapefile
> >>> dir(t)
> ['BeginPointInShapefile', 'CacheExtents', 'CanUseSpatialIndex',
> 'CdlgFilter', 'CellValue', 'Close', 'CreateNew',
> 'CreateNewWithShapeID', 'CreateSpatialIndex', 'Dissolve',
> 'EditCellValue', 'EditClear', 'EditDeleteField', 'EditDeleteShape',
> 'EditInsertField', 'EditInsertShape', 'EditingShapes', 'EditingTable',
> 'EndPointInShapefile', 'ErrorMsg', 'Extents', 'Field', 'FieldByName',
> 'FileHandle', 'Filename', 'GenerateLabels', 'GetIntersection',
> 'GlobalCallback', 'HasSpatialIndex', 'InvertSelection',
> 'IsSpatialIndexValid', 'Key', 'Labels', 'LastErrorCode', 'NumFields',
> 'NumSelected', 'NumShapes', 'Open', 'PointInShape',
> 'PointInShapefile', 'Projection', 'QuickExtents', 'QuickPoint',
> 'QuickPoints', 'QuickQueryInEditMode', 'RefreshExtents',
> 'RefreshShapeExtents', 'Resource', 'Save', 'SaveAs', 'SelectAll',
> 'SelectByShapefile', 'SelectNone', 'SelectShapes',
> 'SelectionDrawingOptions', 'Shape', 'ShapeSelected', 'ShapefileType',
> 'SpatialIndexMaxAreaPercent', 'StartEditingShapes',
> 'StartEditingTable', 'StopEditingShapes', 'StopEditingTable',
> 'UseQTree', 'UseSpatialIndex', '__doc__', '__repr__', 'numPoints']
> >>> t.Open.__doc__
> 'Open(self, str ShapefileName, ICallback cBack) -> bool'
> 
> >>> a = r"C:\2010 USPS GIS\Shapefiles\ADC ATLANTA GA 303.shp"
> >>> t.Open(a,None)
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> TypeError: expected IShapefile, got str
> 
> Can anyone tell me what I'm missing?
> 
> Thanks.
> 
> Bruce
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