Set variable with a loop using the variables name as a string - string

Question

My application requires variables to be set and retrieved multiple times in different forms and subs. Instead of writing the code multiple times i was hoping to use a loop to loop through the variables and set them accordingly. The code below shows my settings menu and how it is built. I'm stuck with setting the variables based on a name that is stored as a string (See last code snippet below).
The section imedialty below are the menu classes. This bit works as expected
Public Class MenuItem
Public Name As String
Public Type As TypeEnum
Enum TypeEnum
CheckBox
ComboBox
TextBox
End Enum
Public Sub New()
End Sub
End Class
Public Class Menu
Public MenuItems() As MenuItem
Public Name As String
Public LinkedVariable as Object
Public Sub New()
End Sub
Public Sub AddMenuItem(ByVal ItemName As String, _
ByVal ItemType As MenuItem.TypeEnum, _
ByVal ItemLinkedVariable as Object)
If MenuItems Is Nothing Then
ReDim MenuItems(0)
Else
ReDim Preserve MenuItems(MenuItems.Length)
End If
MenuItems(MenuItems.Length - 1) = New MenuItem
MenuItems(MenuItems.Length - 1).Name = ItemName
MenuItems(MenuItems.Length - 1).Type = ItemType
MenuItems(MenuItems.Length - 1).LinkedVariable = ItemLinkedVariable
End Sub
End Class
Build the menus in the main form class. This bit works as expected
Public Class Form1
Public Settings As New SettingsForm
Public Sub CreateMenu()
Settings.AddMenu("Menu1")
Settings.Menus(0).AddMenuItem("CheckBoxA", MenuItem.TypeEnum.CheckBox, VariableA)
Settings.Menus(0).AddMenuItem("TextBoxB", MenuItem.TypeEnum.TextBox, VariableB)
Settings.Menus(0).AddMenuItem("TextBoxC", MenuItem.TypeEnum.TextBox, VariableC)
Settings.AddMenu("Menu2")
Settings.Menus(1).AddMenuItem("CheckBoxD", MenuItem.TypeEnum.CheckBox, VariableD)
Settings.Menus(1).AddMenuItem("TextBoxE", MenuItem.TypeEnum.TextBox, VariableE)
'etc......
Settings.Build()
Settings.Show()
End Sub
End Class
Public Class SettingsForm
Public Menus() As Menu
Public VariableA As Boolean
Public VariableB As String
Public VariableC As String
Public VariableD As Boolean
Public VariableE As String
Public Sub New()
InitializeComponent()
End Sub
Public Sub Build()
SettingsTabControl.TabPages.Clear()
If Menus IsNot Nothing Then
For i As Integer = 0 To Menus.Length - 1
SettingsTabControl.TabPages.Add(Menus(i).Name)
SettingsTabControl.TabPages(i).Name = Menus(i).Name & "TabPage"
SettingsTabControl.TabPages(i).Text = Menus(i).Name
AddSettingsItems(Menus(i), i)
Next
End If
End Sub
Public Sub AddSettingsItems(ByVal SelectedMenu As Menu, ByVal TabPageIndex As Integer)
Dim y As Integer = 50
Dim yinc As Integer = 25
If SelectedMenu IsNot Nothing Then
If SelectedMenu.MenuItems IsNot Nothing Then
For i As Integer = 0 To SelectedMenu.MenuItems.Length - 1
Dim formObj As Object
'Specific Settings
Select Case SelectedMenu.MenuItems(i).Type
Case MenuItem.TypeEnum.CheckBox
formObj = New CheckBox
Case MenuItem.TypeEnum.ComboBox
formObj = New ComboBox
Case MenuItem.TypeEnum.TextBox
formObj = New TextBox
formObj.TextAlign = HorizontalAlignment.Right
formObj.BorderStyle = BorderStyle.FixedSingle
End Select
formObj.Name = SelectedMenu.MenuItems(i).Name
formObj.Location = New Point(25, y)
SettingsTabControl.TabPages(TabPageIndex).Controls.Add(formObj)
y = y + yinc
Next
End If
End If
End Sub
End Class
This is the bit i am stuck on i want to be able to set the Variables A,B,C,D,E from the controls that were added to the SettingsTabControl. However i can't work out how to link the Variables to the LinkedVariable objects in each MenuItem. This is what i have but it doesn't work
Private Sub SettingsFromOkButton_Click(sender As Object, e As EventArgs) Handles OkButton.Click
For m As Integer = 0 To Menus.Length - 1
For i As Integer = 0 To Menus(m).MenuItems.Length
Dim currentcontrol As Object = SettingsTabControl.TabPages(m).Controls(Menus(m).MenuItems(i).Name)
Select Case Menus(m).MenuItems(i).Type
Case MenuItem.TypeEnum.CheckBox
If currentcontrol.CheckedState = True Then
Menus(m).MenuItems(i).LinkedVariable = True
Else
Menus(m).MenuItems(i).LinkedVariable = False
End If
Case MenuItem.TypeEnum.ComboBox
Case MenuItem.TypeEnum.TextBox
Menus(m).MenuItems(i).LinkedVariable = currentcontrol.Text
End Select
Next
Next
MsgBox(VariableA & vbCrLf _
VariableB & vbCrLf _
VariableC & vbCrLf _
VariableD & vbCrLf _
VariableE & vbCrLf)
End Sub

Answer 1

I used a reflection
Dim Flags As BindingFlags = BindingFlags.GetField Or BindingFlags.Instance Or BindingFlags.Public
Dim fVar As System.Reflection.FieldInfo = Me.GetType.GetField(ObjectName, Flags)
If TypeOf SettingsTabControl.TabPages(TabPageIndex).Controls(CtrlName) Is TextBox Then
ctrlValue = SettingsTabControl.TabPages(TabPageIndex).Controls(CtrlName).Text
ElseIf TypeOf SettingsTabControl.TabPages(TabPageIndex).Controls(CtrlName) Is CheckBox Then
ctrlValue = CType(SettingsTabControl.TabPages(TabPageIndex).Controls(CtrlName), CheckBox).Checked
ElseIf TypeOf SettingsTabControl.TabPages(TabPageIndex).Controls(CtrlName) Is RadioButton Then
ctrlValue = CType(SettingsTabControl.TabPages(TabPageIndex).Controls(CtrlName), RadioButton).Checked
End If
fVar.SetValue(Me, ctrlValue)