Select value from dropdown box but populate hidden column - excel

Question

I have a set of unique IDs and names:
ID NAME
aa Jeff
bb Matt
cc Trung
dd Trung
All IDs are unique. Names are not.
On a worksheet I have a series of columns:
Date Time ID Name Value
1/1 1:30 aa Jeff 123124
1/2 2:20 cc Trung 12443234
Right now, a user will populate the ID field, the vlookup will return Name.
Is there a way to set up a dropdown on the ID cell that shows a concatenation of the ID and Name, but when selected, stores only the ID?
The idea is that the concatenated value that appears in the dropdown (Ex: aa | Jeff) is more user-friendly that just "aa".

Answer 1

Well, hope my answer will help. If not, please tell me and I will try to improve it.
The code is inside the Worksheet
Private Sub ComboBox1_Change()
'Just use the frist part of the string, ID
Range("I1").Value = Split(Me.ComboBox1.Value, " | ")
'Optional, if you want to put the name using code.
'If not, just use the VLOOLUP
Range("J2").Value = Split(Me.ComboBox1.Value, " | ")(1)
End Sub
Private Sub Worksheet_Activate()
Dim r
Dim c
Dim i
Dim L
Dim myRngID As Range
r = Range("C2").End(xlDown).Row 'the final row of the ID column
c = Range("D2").Column ' the number of the column of the name
Set myRngID = Range(Cells(2, 3), Cells(r, 3)) 'use only the ID range
'Just to clean the ComboBox everytime to avoid duplicates
Me.ComboBox1.Value = ""
L = Me.ComboBox1.ListCount
On Error Resume Next
For i = 0 To L
With Me.ComboBox1
.RemoveItem i
End With
Next i
On Error GoTo 0
'Pupulate the ComboBox with the string {ID[space]|[space]NAME}
For Each i In myRngID
With Me.ComboBox1
.AddItem i.Value & " | " & i.Offset(0, 1).Value
End With
Next i
End Sub
In the worksheet just this
As you can see, the only formula in the sheet is in J1, the VlookUp. In J2 the name is inserted using VBA.
The ComboBox has any special property. Everything is in the code above.
The result is that the name is always taken from the ComboBox, and then no matter which one is selected, always will be the right one, as in the VlookUp.

Answer 2

This should work
Select the Cell on the Second Sheet (the one that will be the vlookup)
Go to the Data Tab > Data Validation > Data Validation
On Settings Select List > Click Source button at the right of the input box > Select Range from the first workbook Screenshot
Now copy and paste that cell in the column on the second workbook