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s0lidmetal on 06/24/10

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Last Edited at 06/24/10 05:12am

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Reflection extension method to copy properties from one object to another object.

/ Published in: Visual Basic

This copies all property values from Class A to Class B. Useful if you have many unrelated classes that share similar properties and you are constantly writing code like:

shirt.Color = pants.Color
shirt.Pattern = pants.Pattern
shirt.Style = pants.Style

Could change to:

pants.CopyPropertiesTo(shirt)

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<System.Runtime.CompilerServices.Extension()> _
        Public Sub CopyPropertiesTo(ByVal src As Object, ByVal dest As Object)
            If dest Is Nothing Then
                Exit Sub
            End If
            Dim srcType As Type = src.GetType()
            Dim destType As Type = dest.GetType()
            Dim pi() As PropertyInfo = srcType.GetProperties(BindingFlags.Public Or BindingFlags.GetProperty Or BindingFlags.Instance)
            For Each p1 As PropertyInfo In pi
                Dim p2 As PropertyInfo = destType.GetProperty(p1.Name, BindingFlags.Public Or BindingFlags.SetField Or BindingFlags.Instance)
                If p2 IsNot Nothing Then
                    If p2.PropertyType Is p1.PropertyType Then
                        p2.SetValue(dest, p1.GetValue(src, Nothing), Nothing, Nothing, Nothing, Nothing)
                    End If
                End If
            Next
        End Sub

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