VBA Userform input validation error - validation

Question

I am new to VBA and my problem might be stupid, but I cant fix it, so please help me if you can!
Here is the thing: I got userform that fills spreadsheet perfectly, but if information is not entered it does crazy things. As you may see below i found some piece of code to check if the data is entered, so if its not window pops up and you have to enter something, but when you do form fills 2 rows of data instead of one. For example, if pick row 'x' and want to put values 'a','b','c','d', but forgot to put value 'c' then it shows an error and when i type missing value 'c' and press OK it creates row 'x' with values 'a','b',' ','d' and row 'x+1' with values 'a','b','c','d'.
Here is my code:
Private Sub cmdok_Click()
'next empty cell in column A
Set c = Range("a65536").End(xlUp).Offset(1, 0)
Application.ScreenUpdating = False 'speed up, hide task
'write userform entries to database
c.Value = Me.txtFname.Value
c.Offset(0, 3).Value = Me.txtngoals.Value
c.Offset(0, 28).Value = Me.cmbDiag.Value
If Me.optAcute.Value = "True" And Me.optchronic.Value = "False" Then
c.Offset(0, 29).Value = 1
c.Offset(0, 30).Value = ""
Else
c.Offset(0, 29).Value = ""
c.Offset(0, 30).Value = 1
End If
'input validation
If txtFname.Value = "" Then
MsgBox ("Sorry, you need to provide a Name")
txtFname.SetFocus
Exit Sub
End If
If txtngoals.Value = "" Then
MsgBox ("Sorry, you need to provide goals")
txtngoals.SetFocus
Exit Sub
End If
If cmbDiag.Value = "" Then
MsgBox ("Sorry, you need to provide Diagnosis")
cmbDiag.SetFocus
Exit Sub
End If
If optAcute.Value = optchronic.Value Then
MsgBox ("Sorry, you need to select Time since injury")
Exit Sub
End If
'clear the form
With Me
.txtFname.Value = vbNullString
.cmbDiag.Value = vbNullString
.optAcute.Value = vbNullString
.optchronic.Value = vbNullString
.txtngoals.Value = vbNullString
End With
Application.ScreenUpdating = True
End Sub
thank you in advance

Answer 1

Try moving the code "write userform entries to database" to after the validation checks.
Private Sub cmdok_Click()
'next empty cell in column A
Set c = Range("a65536").End(xlUp).Offset(1, 0)
Application.ScreenUpdating = False 'speed up, hide task
'input validation
If txtFname.Value = "" Then
MsgBox ("Sorry, you need to provide a Name")
txtFname.SetFocus
Exit Sub
End If
If txtngoals.Value = "" Then
MsgBox ("Sorry, you need to provide goals")
txtngoals.SetFocus
Exit Sub
End If
If cmbDiag.Value = "" Then
MsgBox ("Sorry, you need to provide Diagnosis")
cmbDiag.SetFocus
Exit Sub
End If
If optAcute.Value = optchronic.Value Then
MsgBox ("Sorry, you need to select Time since injury")
Exit Sub
End If
'write userform entries to database
c.Value = Me.txtFname.Value
c.Offset(0, 3).Value = Me.txtngoals.Value
c.Offset(0, 28).Value = Me.cmbDiag.Value
If Me.optAcute.Value = "True" And Me.optchronic.Value = "False" Then
c.Offset(0, 29).Value = 1
c.Offset(0, 30).Value = ""
Else
c.Offset(0, 29).Value = ""
c.Offset(0, 30).Value = 1
End If
'clear the form
With Me
.txtFname.Value = vbNullString
.cmbDiag.Value = vbNullString
.optAcute.Value = vbNullString
.optchronic.Value = vbNullString
.txtngoals.Value = vbNullString
End With
Application.ScreenUpdating = True