Can i put system datatable together with boolean?

Question

I have a problem which i have datatable for getHoliday and a boolean to check an error when user enter wrong input for example user dont select any value from combobox so it'll show you an error after you click the button submit. the datatable getHoliday is use for when user click any date on holiday it'll not execute when user click button submit. So now, i need a solution for when user click button submit it'll show an error message.
Below is the function for checking.

   Private Function ErrorFree() As Boolean

        If lblEmpNO.Text = "" Then
            DisplayMessage("error", "ERROR", "Please Select Employee No!")
            Return False
            Exit Function
        ElseIf lblemployeename.Text = "" Then
            DisplayMessage("error", "ERROR", "Please Select Employee No!")
            Return False
            Exit Function
        ElseIf lbldepartment.Text = "" Then
            DisplayMessage("error", "ERROR", "Please Select Employee No!")
            Return False
            Exit Function
        ElseIf cmbReason.SelectedIndex = -1 Then
            DisplayMessage("error", "ERROR", "Please Select The Reason!")
            Return False
            Exit Function
        ElseIf datepickerFrom.Text = "" Then
            DisplayMessage("error", "ERROR", "Please Select The Date!")
            Return False
            Exit Function
        ElseIf datepickerto.Text = "" Then
            DisplayMessage("error", "ERROR", "Please Select The Date!")
            Return False
            Exit Function
        ElseIf txtRemark.Text = "" Then
            DisplayMessage("error", "ERROR", "Remarks is empty!")
            Return False
            Exit Function

        End If
        Return True
    End Function

Answer 1

Hi @CheeFaiy ,
You said you use the combox and the submit button. However, I don's see any codes you post about these. Please post more reference codes.
When you click the submit button, it will trigger the button click event. And then it will check the combobox 's value. Whether you have trigger the ErrorFree() method?

Best regards,
Yijing Sun

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