Problems w/ MapScript C#

[Ian Erickson]

Nope...

This no-workie.  It is not a GDI+ lock (at least in my case).  For some
reason, after 3-4 sequential calls to the MapRefresh function, suddenly
the imageObj reference is suddenly null!  I've downloaded the alternate
set of binaries from Morten Nielsen - we'll evalutate that set of
binaries and report back...

- Ian

Sean Gillies wrote:

> On Apr 4, 2005, at 9:09 AM, Mike Saunt wrote:
>
>> Sean
>>
>> I replied to Ian last night but had hit reply and not reply all hence
>> it hadn't come on to the list.  I had a similar problem on a different
>> project with the .NET GDI+ locking the image file and the following
>> resolved it.
>>
>> public System.Drawing.Image MapRefresh(int mapHeight, int mapWidth)
>> {
>>        if (map == null)
>>        {
>>                return null;
>>        }
>>        map.height = mapHeight;
>>        map.width = mapWidth;
>>        MapScriptDotNet.imageObj img = map.draw();
>>
>>        string sMapImage = @"C:\windows\temp\map.png";
>>        img.save(sMapImage,map);
>>
>>        //we need to load via a memory stream as the GDI+ locks the
>> image
>>        System.IO.FileStream fs = new System.IO.FileStream(sMapImage,
>> FileMode.Open,  FileAccess.Read, FileShare.Read);
>>        System.Drawing.Image mapImage =
>> System.Drawing.Image.FromStream(fs);
>>        fs.Close();
>>        fs = null;
>>        File.Delete(sMapImage);
>>        return mapImage;
>>
>> }
>>
>> Hope this helps
>>
>> Cheers
>> Mike Saunt
>>
>>
>
> Aha!  I have a feeling we are going to discover a few more MapServer
> and .NET quirks yet.
>
> cheers,
> Se
>

--
Ian Erickson
AnalyGIS, LLC