setting selected item of a combo box filled with objects

Say I have a combo box with the following simple object
>
Public class MyObject
public ID as integer
public Name as string
>
public overrides sub ToString() as string
return name
end sub
end Class
>
now say I have a combo box that I add to the screen and add oh say 20 of
these objects to it (I don't want to data bind in this instance)... now say
I have the ID of 30, how would I tell the combo box to select the object
that has the ID of 30? I thought IEquatable and IComparable would do the job
since it would be a comparision... so implement a IComparable<tand
IEquatable<twith the type integer... to compare to the ID... but nothing
happened... so how would you do this? I just want to say say the selected
item = 30 and have the combo box select the correct item.. thanks!

On Jul 16, 9:39 am, "Smokey Grindle" <nos...@nospam.comwrote:>
While this might not be the best way, I would shadow the SelectedItem
property and loop through the Items collection.
>
Something Like:
>
Public Class MyCombobox
Inherits ComboBox
>
Public Shadows Property SelectedItem() As Object
Get
Return MyBase.SelectedItem
End Get
Set(ByVal value As Object)
If IsNumeric(value) Then
For Each o As Object In Me.Items
Try
Dim myObject As MyObject = DirectCast(o,
MyObject)
If myObject.ID = CInt(value) Then
MyBase.SelectedItem = o
Exit For
End If
Catch
Continue For
End Try
Next
Else
MyBase.SelectedItem = value
End If
End Set
End Property
>
End Class
>
Please note I only tested this to see if it would work with
"Me.ComboBox1.SelectedItem = SomeInt", so you should do some
additional testing just in case.
>
Thanks,
>
Seth Rowe
>

I dont want to make a custom combo box for every type I have like this...
this was just one example...
>
"rowe_newsgroups" <rowe_em...@yahoo.comwrote in message
>
news:1184595117.442640.91850@n2g2000hse.googlegrou ps.com...
>>>>>>>>>>>>

I dont want to make a custom combo box for every type I have like
this... this was just one example...

On Jul 16, 10:37 am, "Smokey Grindle" <nos...@nospam.comwrote:>
Ahh, that puts a different spin on things.
>
Perhaps you could use an Interface on the types that forces them to
implement an integer ID property? As it would be a single member
interface it shouldn't be very hard to implement (especially since you
seem to be using an ID property already) Then you could use the new
combobox class to handle any of these items (this also means you could
add multiple item types to a single combobox and select them by Id -
as long as they implement the interface).
>
If you don't want to go the Interface route, I'm not sure what to tell
you. You somehow have to have a way to inform the combobox on which
property to inspect to determine equality.
>
Thanks,
>
Seth Rowe
>

Say I have a combo box with the following simple object
>
Public class MyObject
public ID as integer
public Name as string
>
public overrides sub ToString() as string
return name
end sub
end Class
>
now say I have a combo box that I add to the screen and add oh say 20 of
these objects to it (I don't want to data bind in this instance)... now
say I have the ID of 30, how would I tell the combo box to select the
object that has the ID of 30? I thought IEquatable and IComparable would
do the job since it would be a comparision... so implement a
IComparable<tand IEquatable<twith the type integer... to compare to
the ID... but nothing happened... so how would you do this? I just want to
say say the selected item = 30 and have the combo box select the correct
item.. thanks!