[IronPython] Conflicting information with Ironpython and MapWindowGIS interop

[Bruce Bromberek]

Thanks Dino.  But now I get


>>> shapefile1 = MapWinGIS.Shapefile()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: Cannot create instances of Shapefile because it is abstract

So then I poked around a bit and found ShapeFileClass, but then I get
a different error.

>>> s=MapWinGIS.ShapefileClass()
>>> tst = s.Open(a,None)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: Could not convert argument 0 for call to Open.

I guess its time to add IronPython in Action back to my Safari account
and read the C# stuff I skipped over before.


On Thu, Jul 1, 2010 at 9:34 PM, Dino Viehland <dinov at microsoft.com> wrote:
> 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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