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Displaying property values in IDE

Hi there.

I am creating an inherited control containing a property named InputDataType which denotes what type of data the user will by allowed to type in. However, I want this property to have the predefined "String","Integer","Decimal" values in the IDE, thing which doesn't happen with the string type (happens with types such as boolean that have predefined values). I suppose I have to create a class, array, collection or something but I have been unable to find how to do it. Here is my code:

Private strInputDataType As String = "String"

Public Property InputDataType() As String
Get
Return strInputDataType
End Get
Set(ByVal Value As String)
Select Case Value
Case "String", "Integer", "Decimal"
strInputDataType = Value
Case Else
strInputDataType = "String"
End Select
End Set
End Property

What must I do in order for the "String", "Integer" and "Decimal" values to be displayed in the IDE in the property's value field?

Thanks...
0
acicovic
Asked:
acicovic
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1 Solution
 
vigridCommented:
Simple. Use enumerations

Enum DataType
  String,
  Integer,
  Decimal
End Enum

And use DataType enumeration in place of your strings. You should have access to the type in the designer in a way you wanted.

HTH
0
 
acicovicAuthor Commented:
Hi there.

I tried, but I don't seem to be able to achieve it.  The only change is that I have to type 0 (for str), 1 (for int) and 2 (for dec) (which should be the inverse if I want it to be user friendly).  In addition, the numbers do *not* appear in a list.  My code:

    Enum DataType
        Str = 0
        Int = 1
        Dec = 2
    End Enum

    Public Property InputDataType() As DataType
        Get
            Return strInputDataType
        End Get
        Set(ByVal Value As DataType)
            Select Case Value
                Case DataType.Str, DataType.Int, DataType.Dec
                    strInputDataType = Value
                Case Else
                    strInputDataType = DataType.Str
            End Select
        End Set
    End Property

What am I doing wrong?
0
 
acicovicAuthor Commented:
forgot to mention that below the Enum I have the following line:

Private strInputDataType As DataType
0
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vigridCommented:
Public Class UserControl1
      Inherits UserControl

      ' Methods
      Public Sub New()
      Protected Overrides Sub Dispose(ByVal disposing As Boolean)
      Private Sub InitializeComponent()

      ' Properties
      Public Property InputDataType As DataType

      ' Fields
      Private components As Container
      Private m_type As DataType

      ' Nested Types
      Public Enum DataType
            ' Fields
            [Decimal] = 1
            [Integer] = 0
            [String] = 2
      End Enum

      Public Property InputDataType As DataType
            Get
                  Return Me.m_type
            End Get
            Set(ByVal value As DataType)
                  Me.m_type = value
            End Set
      End Property
End Class

0
 
vigridCommented:
Very fast example. I made it in C#, compiled it and decompiled it in .NET Reflector, so the code may seem funny at first look, but the essential functionality is there. I don't know VB.NET, so I'm helping you out with my C# experience. HTH
0
 
acicovicAuthor Commented:
Hi there.

I Got it working, although I cannot understand why it didn't work in the first place.  Here's the code for anyone who's interested:

    Enum DataType As Byte
        [Decimal]
        [Integer]
        [String]
    End Enum

    Private dtInputDataType As DataType

    Public Property InputDataType() As DataType
        Get
            Return dtInputDataType
        End Get
        Set(ByVal Value As DataType)
            Select Case Value
                Case DataType.String, DataType.Integer, DataType.Decimal
                    dtInputDataType = Value
                Case Else
                    dtInputDataType = DataType.String
            End Select
        End Set
    End Property
0

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