For 循环不会将值添加到点集合

Question

The for loop doesn't add any value to my points collection:

Esri.ArcGISRuntime.Geometry.PointCollection VMM40Points = new Esri.ArcGISRuntime.Geometry.PointCollection(Spatialreference);
            for (int i = 1; i == xyz.Count/3; i += 3)
            {
                VMM40Points.Add(xyz[i - 1], xyz[i], xyz[i + 1]);
            }

this is the debugger: https://i.stack.imgur.com/7ZXwA.png

Answer 1

The "while" portion of the for loop was incorrect: it runs while the condition is true, not until .

I'm not sure why you have [i -1] . Is there a special reason? If not, you are making the loop conditions much more complicated than necessary.

var VMM40Points = new Esri.ArcGISRuntime.Geometry.PointCollection(Spatialreference); 
for (int i = 0; i < xyz.Count; i+=3)
{
    VMM40Points.Add(xyz[i], xyz[i + 1], xyz[i + 2]);
}

Answer 2

Change your condition to i < xyz.Count/3 .