Excel data checking

Question

Excel data checking

I have an Excel UserForm which contains the following fields; date, name and work.

In the event that the worksheet contains the same date and name pairing, I want data transfer from the Userform blocked.

Example

A worksheet has one entry:

• Column A has the date 1/1/2017
• Column B has the name john

For the worksheet above, the following rules apply:

1. Information can be passed from the UserForm for 3/1/2017 and john.
2. Information can be passed from the UserForm for 1/1/2017 and jane.
3. Information cannot be passed from the UserForm for 1/1/2017 and john.

Answer 1

Dim k As Long
Dim matched As Boolean
matched = False

' Loop over all used rows
For k = 1 to ActiveSheet.UsedRange.Rows.Count

    ' Check if concatenated string of date & name is unique
    ' e.g. '01/01/17john'
    If ActiveSheet.Cells(k, "A").Text & ActiveSheet.Cells(k, "B").Text = _
       myUserForm.DateField.Text & myUserForm.NameField.Text Then

        MsgBox "This Name / Date combination is not unique, pick again"

        matched = True

        Exit For

    End If

Next k

If matched = False Then

    ' Name/Date combination is unique, send data to sub or whatever... 

End If