Question

I am converting a codeblock from C# to VB.NET using the http://www.developerfusion.com/tools/convert/csharp-to-vb/

All is going well except for one line which I cannot figure how to convert:

C# source

result.DrawPolyline(Array.ConvertAll<PointF, Point>(pts, Point.Round), true, new Bgr(Color.Red), 5);

Using the converter gives this

result.DrawPolyline(Array.ConvertAll(Of PointF, Point)(pts, Point.Round), True, New Bgr(Color.Red), 5)

The error in the above line is:

Argument not specified for parameter ‘value’ of ‘Public Shared
Function Round(value As System.Drawing.PointF) As
System.Drawing.Point’.

Answer 1

This should convert an Array of PointF to Point:

result.DrawPolyline(Array.ConvertAll(Of PointF, Point)(pts, Function(p) Point.Round(p)), True, New Bgr(Color.Red), 5)

You need to pass the PointF to Point.Round.

Tested with:

Dim pts As PointF() = {New PointF(123.23, 12345.23)}
Dim r = Array.ConvertAll(Of PointF, Point)(
            pts,
            Function(p) Point.Round(p))

It would also work if you would pass the delegate to Point.Round as @Jon has mentioned:

Dim pts As PointF() = {New PointF(123.23, 12345.23)}
Dim r = Array.ConvertAll(Of PointF, Point)(
            pts,
            AddressOf Point.Round)