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GetField – Retrieving the value of a public field via reflection

GetField – Retrieving the value of a public field via reflection

' Return the value of the public field with the specified name,'  defined inside the obj object' Note: requires Imports System.Reflection'' Example:'   Public TestField As String = "hello"'   ...'   MessageBox.Show(GetField(Me, "TestField", ""))Function GetField(ByVal obj As Object, ByVal fieldName As String, _    ByVal defaultValue As Object) As Object    Try        ' try with a field first        Dim fi As FieldInfo = obj.GetType().GetField(fieldName, _            BindingFlags.Instance Or BindingFlags.Public Or _            BindingFlags.NonPublic)        If Not fi Is Nothing Then            Return fi.GetValue(obj)        End If        ' else, try with a property (VB implements many form fields as         ' properties)        Dim pi As PropertyInfo = obj.GetType().GetProperty(fieldName, _            BindingFlags.Instance Or BindingFlags.Public Or _            BindingFlags.NonPublic)        If Not pi Is Nothing Then            Return pi.GetValue(obj, Nothing)        End If    Catch    End Try    ' if property doesn't exist or throws    Return defaultValueEnd Function

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