Convert string to int if string is a number
Use IsNumeric
. It returns true if it's a number or false otherwise.
Public Sub NumTest()
On Error GoTo MyErrorHandler
Dim myVar As Variant
myVar = 11.2 'Or whatever
Dim finalNumber As Integer
If IsNumeric(myVar) Then
finalNumber = CInt(myVar)
Else
finalNumber = 0
End If
Exit Sub
MyErrorHandler:
MsgBox "NumTest" & vbCrLf & vbCrLf & "Err = " & Err.Number & _
vbCrLf & "Description: " & Err.Description
End Sub
Cast to long or cast to int, be aware of the following.
These functions are one of the view functions in Excel VBA that are depending on the system regional settings. So if you use a comma in your double like in some countries in Europe, you will experience an error in the US.
E.g., in european excel-version 0,5 will perform well with CDbl(), but in US-version it will result in 5. So I recommend to use the following alternative:
Public Function CastLong(var As Variant)
' replace , by .
var = Replace(var, ",", ".")
Dim l As Long
On Error Resume Next
l = Round(Val(var))
' if error occurs, l will be 0
CastLong = l
End Function
' similar function for cast-int, you can add minimum and maximum value if you like
' to prevent that value is too high or too low.
Public Function CastInt(var As Variant)
' replace , by .
var = Replace(var, ",", ".")
Dim i As Integer
On Error Resume Next
i = Round(Val(var))
' if error occurs, i will be 0
CastInt = i
End Function
Of course you can also think of cases where people use commas and dots, e.g., three-thousand as 3,000.00. If you require functionality for these kind of cases, then you have to check for another solution.