System.AccessViolationException after EditAddShape

1

I need to programmatically add a point to the map, and then build a polygon, starting from this point. That is, to build a polygon began from the second point

I tried to execute the code below:

Point point = new Point {x = xEnd, y = yEnd};

Shape shape = new Shape();
shape.Create(ShpfileType.SHP_POLYGON);
shape.InsertPoint(point, 0);

Shapefile shapefile = new Shapefile();
shapefile.CreateNewWithShapeID("", ShpfileType.SHP_POLYGON);
shapefile.EditAddShape(shape); // !!!
shapefile.InteractiveEditing = true;

axMap.AddLayer(shapefile, true);

axMap.ShapeEditor.StartEdit(1, 0);

I see my point on map, but after this instantly I get System.AccessViolationException error. What am I doing wrong?

2

I see @Mathijs.Dumon already created an JIRA issue about this: https://mapwindow.atlassian.net/browse/MWGIS-174
I’ll see if I can reproduce it with a test.

3

Which version of MapWinGIS are you using?
I’m using the latest development release and have no problems with your code.

This is my test:

[TestMethod]
public void EditAddShapeTest()
{
    var pnt = new Point { x = 6.7369281, y = 53.1603648 };

    var shp = new Shape();
    shp.Create(ShpfileType.SHP_POLYGON);
    shp.InsertPoint(pnt, 0);

    var sf = new Shapefile();
    var result = sf.CreateNewWithShapeID("", ShpfileType.SHP_POLYGON);
    Assert.IsTrue(result, "CreateNewWithShapeID failed: " + sf.ErrorMsg[sf.LastErrorCode]);
    
    var shpIndex = sf.EditAddShape(shp);
    Assert.IsTrue(shpIndex > -1, "EditAddShape failed: " + sf.ErrorMsg[sf.LastErrorCode]);

    sf.InteractiveEditing = true;
    Assert.IsTrue(sf.InteractiveEditing, "InteractiveEditing failed: " + sf.ErrorMsg[sf.LastErrorCode]);

    var layerIndex = _axMap1.AddLayer(sf, true);
    Assert.IsTrue(layerIndex > -1, "AddLayer failed: " + sf.ErrorMsg[sf.LastErrorCode]);

    result = _axMap1.ShapeEditor.StartEdit(layerIndex, shpIndex);
    Assert.IsTrue(result, "ShapeEditor.StartEdit failed: " + sf.ErrorMsg[sf.LastErrorCode]);
}

I used the same syntax as you and added some checks of the return values.
I did change the call of StartEdit I’m using the return values from EditAddShape and AddLayer

4

I used the last release version. With the last development release I haven’t problems with this code

5

Thanks for the feedback.
Several changes have been made since the last release version.
It seems it has been fixed already.
I’m closing this issue.