Type mismatch error in VBA when adding data to textbox - vba

Question

I have a TextBox and a ListBox with a list of various cities being populated from an Excel file
Now each city has one of two options: either within territory or outside. I want that option to be shown in textBox
I tried something like this :
Private Sub CommandButton1_Click()
TextBox2.Value = Application.VLookup(Me.ListBox1.Text,Sheets("Sheet1").Range("B:C"), 2, False)
End Sub
But am getting error stating that :
Run Time Error 2147352571 (80020005) . Could not set Value property. Type mismatch.
My excel file is something like this :

Answer 1

Let say your data are stored in Sheet1. You want to bind these data to ListBox1 on UserForm. I'd suggest to use custom function to load data instead of binding data via using RowSource property. In this case i'd suggest to use Dictionary to avoid duplicates.
See:
Private Sub UserForm_Initialize()
Dim d As Dictionary
Dim aKey As Variant
Set d = GetDistinctCitiesAndTerritories
For Each aKey In d.Keys
With Me.ListBox1
.AddItem ""
.Column(0, .ListCount - 1) = aKey
.Column(1, .ListCount - 1) = d.Item(aKey)
End With
Next
End Sub
'needs reference to Microsoft Scripting Runtime!
Function GetDistinctCitiesAndTerritories() As Dictionary
Dim wsh As Worksheet
Dim dict As Dictionary
Dim i As Integer
Set wsh = ThisWorkbook.Worksheets("Sheet1")
Set dict = New Dictionary
i = 2
Do While wsh.Range("A" & i) <> ""
If Not dict.Exists(wsh.Range("B" & i)) Then dict.Add wsh.Range("B" & i), wsh.Range("C" & i)
i = i + 1
Loop
Set GetDistinctCitiesAndTerritories = dict
End Function
After that, when user clicks on ListBox, city and territory are displayed in corresponding textboxes.
Private Sub ListBox1_Click()
Me.TextBoxCity = Me.ListBox1.List(Me.ListBox1.ListIndex, 0)
Me.TextBoxTerritory = Me.ListBox1.List(Me.ListBox1.ListIndex, 1)
End Sub
Note: code was written straight from the head, so it can contains errors!

Answer 2

The problem is likely that you aren't checking to see to see if the call to Application.VLookup succeeded. Most values returned can be successfully cast to a String - with one important exception: If the VLookup returns an error, for example it doesn't find Me.ListBox1.Text - it can't cast the Variant returned directly.
This should demonstrate:
Private Sub ReturnsOfVLookup()
Dim works As Variant, doesnt As String
works = Application.VLookup("Something not found", _
Sheets("Sheet1").Range("B:C"), 2, False)
Debug.Print works
On Error Resume Next
doesnt = Application.VLookup("Something not found", _
Sheets("Sheet1").Range("B:C"), 2, False)
If Err.Number <> 0 Then
Debug.Print Err.Description
Else
Debug.Print doesnt 'We won't be going here... ;-)
End If
End Sub