This Elapsed Time Calculation System is useful for check the employees working time. This system start to work when employee log in to the office until log off from office.
Dim date1 As String Dim i, flg As Integer Dim th, ot As Decimal Public st As String Public wh As Decimal
Private Function CalculateHours(ByRef tm1 As Date, ByRef tm2 As Date) As Decimal Dim i, j As Double i = Hour(tm2) - Hour(tm1) j = (Minute(tm2) - Minute(tm1)) If j < 0 Then i = i - 1 j = 60 + j End If CalculateHours = CDec(i & "." & j) End Function
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click If (CalculateHours(DateTimePicker1.Value, DateTimePicker2.Value) < 0) Then MessageBox.Show("Invalid Login / Logout Time", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error) Exit Sub End If Try th = 0 Dim b, fin As Date txtOTH.Text = CalculateHours(DateTimePicker1.Value, DateTimePicker2.Value) th = (CalculateHours(DateTimePicker1.Value, DateTimePicker2.Value) \ 1 + (((CalculateHours(DateTimePicker1.Value, DateTimePicker2.Value) Mod 1) * 100) / 60)) st = Today & " " & st.Substring(11) b = st If CalculateHours(b, DateTimePicker1.Value) > 0 Then txtOTH.Text = (CalculateHours(b, DateTimePicker1.Value) \ 1 + ((CalculateHours(b, DateTimePicker1.Value) Mod 1) * 100) / 60) End If If (Weekday(DateTimePicker3.Value) = 7) Then ot = CalculateHours(b.AddHours(5.5), DateTimePicker2.Value) Else ot = CalculateHours(b.AddHours(wh), DateTimePicker2.Value) End If txtOTH.Text = ot \ 1 + (((ot Mod 1) * 100) / 60) If (Convert.ToDecimal(txtOTH.Text) < 0) Then txtOTH.Text = "0.00" End If Catch ex As Exception End Try End Sub
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