Source Code Pola From Transaksi Penjualan Vb .Net

Pada tutorial kali ini aku akan memperlihatkan Logika dalam Membuat Form Transaksi Penjualan pada VB .NET. Koding form transaksi memang biasanya lebih panjang dari form master lainnya. Karena pada form transaksi lebih kompleks dan banyak yang harus di kendalikan pada Dataridview Visual Basic .NET biar form transaksi ini berjalan dengan semestinya.

Hasil dari from transaksi penjualan ialah menyerupai gambar dibawah ini :

Bagaimana apakah anda tertarik untuk menciptakan Form transaksi diatas?

Berikut langkahnya :
Silahakn buka VB .NET anda
Bautlah sebuah project VB .NET
Jika sudah muncul Form1, silahkan design form1 menyerupai gambar dibawah ini :

Pada gambar diatas terdapat :
DataGridView yang diganti namanya menjadi : dgvData
Button Tambah : btnAdd
Button Hapus : btnRemove
Label Total
dan TexBox : txtSumTotal

JIka sudah simpulan menciptakan Form menyerupai gambar diatas,
Silahkan Masukan Koding pada Form1 dibawah ini :

 Public Class Form1     Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load         Me.CenterToScreen()         Me.Text = "Contoh Form Transaksi Penjualan - www.javanetmedia.com"         txtSumTotal.Text = "0.00"         SetupGridView()         Dim row As String() = New String() {1, "BRG0001", "Nama Barang 1", 1, 0.0, 0.0}         ' Add First Row         dgvData.Rows.Add(row)         ' Focus         dgvData.Focus()         dgvData.CurrentCell = dgvData.Rows(dgvData.RowCount - 1).Cells(3)         ' / Summary Cell Index = 5         CalSumTotal()     End Sub      ' / --------------------------------------------------------------------------------     Private Sub SetupGridView()         With dgvData             .RowHeadersVisible = False             .AllowUserToAddRows = False             .AllowUserToDeleteRows = False             .AllowUserToResizeRows = False             .MultiSelect = False             .ReadOnly = False             ' Columns Specified             dgvData.ColumnCount = 6             dgvData.Columns(0).Name = "No"             'dgvData.Columns(0).Visible = False  ' Don't show Primary Key             dgvData.Columns(1).Name = "Kode_Barang"             dgvData.Columns(2).Name = "Nama_barang"             dgvData.Columns(3).Name = "Jumlah"             dgvData.Columns(3).ValueType = GetType(Integer)             dgvData.Columns(4).Name = "Harga"             dgvData.Columns(4).ValueType = GetType(Double)             dgvData.Columns(5).Name = "Total"             dgvData.Columns(5).ValueType = GetType(Double)             ' Hidden column index 0 ... It's Primary Key for DataBase             .Columns("No").Visible = True ' False             .Columns("Kode_Barang").HeaderText = "Kode_Barang"             .Columns("Nama_Barang").HeaderText = "Nama_Barang"             .Columns("Jumlah").HeaderText = "Jumlah"             .Columns("Harga").HeaderText = "Harga"             ' Total Column             With .Columns("Total")                 .HeaderText = "Total"                 .ReadOnly = True                 .DefaultCellStyle.BackColor = System.Drawing.Color.LightGoldenrodYellow                 .DefaultCellStyle.ForeColor = System.Drawing.Color.Red                 .DefaultCellStyle.Font = New Font(dgvData.Font, FontStyle.Bold)             End With             ' Adjust Column width             .Columns(0).Width = 35             .Columns(1).Width = dgvData.Width \ 5             .Columns(2).Width = dgvData.Width \ 5             .Columns(3).Width = dgvData.Width \ 5 - 20             .Columns(4).Width = dgvData.Width \ 5 - 20             .Columns(5).Width = dgvData.Width \ 5 ' + 2             ' Header Own Style             With .ColumnHeadersDefaultCellStyle                 .BackColor = Color.Navy                 .ForeColor = Color.White                 .Font = New Font(dgvData.Font, FontStyle.Bold)             End With             ' Alignment only columns 3 to 5             For i As Byte = 3 To 5                 ' Header Alignment                 .Columns(i).HeaderCell.Style.Alignment = DataGridViewContentAlignment.MiddleRight                 ' Cell Alignment                 .Columns(i).DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleRight             Next         End With     End Sub      ' / --------------------------------------------------------------------------------     Private Sub Form1_Resize(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Resize         With dgvData             .Width = Me.Width - 22         End With         txtSumTotal.Left = Me.Width - (txtSumTotal.Width + 20)         Label1.Location = New Point(txtSumTotal.Left - Me.Label1.Width, txtSumTotal.Top + 3)     End Sub      ' / --------------------------------------------------------------------------------     ' / Add new row     Private Sub btnAddRow_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click         Dim Position As Integer = dgvData.Rows.Count - 1         Dim LastRow = (From Items In dgvData.Rows.Cast(Of DataGridViewRow)() Select Items).ElementAt(Position)          Dim PK As Long = LastRow.Cells(0).Value + 1         Dim row As String() = New String() {PK, "BRG000" & PK, "Nama Barang " & PK, 1, 0.0, 0.0}         dgvData.Rows.Add(row)         ' Focus         dgvData.CurrentCell = dgvData.Rows(dgvData.RowCount - 1).Cells(3)         dgvData.Focus()         ' /         CalSumTotal()     End Sub      ' / --------------------------------------------------------------------------------     ' / Remove selected row     Private Sub btnDelRow_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRemove.Click         If dgvData.RowCount = 1 Then Exit Sub         dgvData.Rows.Remove(dgvData.CurrentRow)         dgvData.Refresh()         ' /          CalSumTotal()     End Sub      ' / --------------------------------------------------------------------------------     ' / Calcualte sum of Total (Column Index = 5)     Private Sub CalSumTotal()         txtSumTotal.Text = "0.00"         For i As Byte = 0 To dgvData.RowCount - 1             ' CDbl = Convert to Double             txtSumTotal.Text = CDbl(txtSumTotal.Text) + CDbl(dgvData.Rows(i).Cells(5).Value)         Next         txtSumTotal.Text = Format(CDbl(txtSumTotal.Text), "#,##0.00")     End Sub      ' / --------------------------------------------------------------------------------     ' / Before Edit Data     Private Sub dgvData_CellBeginEdit(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellCancelEventArgs) Handles dgvData.CellBeginEdit         Dim Quantity As Integer = dgvData.Rows(e.RowIndex).Cells(3).Value         Dim UnitPrice As Double = dgvData.Rows(e.RowIndex).Cells(4).Value         dgvData.Rows(e.RowIndex).Cells(5).Value = (Quantity * UnitPrice).ToString("#,##0.00")         ' /          CalSumTotal()     End Sub      ' / --------------------------------------------------------------------------------     ' / After you press Enter     Private Sub dgvData_CellEndEdit(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles dgvData.CellEndEdit          Select Case e.ColumnIndex             Case 3, 4 ' Column Index = 3 (Quantity), Column Index = 4 (UnitPrice)                 ' Quantity                 ' If Null Value                 If IsDBNull(dgvData.Rows(e.RowIndex).Cells(3).Value) Then dgvData.Rows(e.RowIndex).Cells(3).Value = 0                 Dim Quantity As Integer = dgvData.Rows(e.RowIndex).Cells(3).Value                 ' Keep original value in temporary. (Tag Properties)                 dgvData.Tag = Quantity                 If Quantity <= 0 Then                     dgvData.Rows(e.RowIndex).Cells(3).Value = dgvData.Tag                     Quantity = dgvData.Tag                 End If                  ' UnitPrice                 ' If Null Value                 If IsDBNull(dgvData.Rows(e.RowIndex).Cells(4).Value) Then dgvData.Rows(e.RowIndex).Cells(4).Value = 0.0                 Dim UnitPrice As Double = dgvData.Rows(e.RowIndex).Cells(4).Value                 dgvData.Tag = UnitPrice                 If UnitPrice < 0 Then                     dgvData.Rows(e.RowIndex).Cells(4).Value = dgvData.Tag                     UnitPrice = dgvData.Tag                 End If                 ' Quantity x UnitPrice                 dgvData.Rows(e.RowIndex).Cells(5).Value = (Quantity * UnitPrice).ToString("#,##0.00")                 CalSumTotal()         End Select     End Sub      ' / --------------------------------------------------------------------------------     Private Sub dgvData_EditingControlShowing(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles dgvData.EditingControlShowing         Select Case dgvData.Columns(dgvData.CurrentCell.ColumnIndex).Name             ' / Can use both ColumeIndex or Field Name             Case "Quantity", "UnitPrice"                 RemoveHandler e.Control.KeyPress, AddressOf ValidKeyPress                 AddHandler e.Control.KeyPress, AddressOf ValidKeyPress         End Select     End Sub      ' / --------------------------------------------------------------------------------     Private Sub ValidKeyPress(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyPressEventArgs)         Dim tb As TextBox = sender         Select Case dgvData.CurrentCell.ColumnIndex             Case 3  ' Quantity is Integer                 Select Case e.KeyChar                     Case "0" To "9"   ' digits 0 - 9 allowed                     Case ChrW(Keys.Back)    ' backspace allowed for deleting (Delete key automatically overrides)                     Case ChrW(Keys.Delete)  ' Delete key                      Case Else ' everything else ....                         ' True = CPU cancel the KeyPress event                         e.Handled = True ' and it's just like you never pressed a key at all                 End Select              Case 4  ' UnitPrice is Double                 Select Case e.KeyChar                     Case "0" To "9"                         ' Allowed "."                     Case "."                         ' can present "." only one                         If InStr(tb.Text, ".") Then e.Handled = True                      Case ChrW(Keys.Back)                     Case ChrW(Keys.Delete)                     Case Else                         e.Handled = True                  End Select         End Select     End Sub     Private Sub Form1_FormClosed(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosedEventArgs) Handles Me.FormClosed         Me.Dispose()         Application.Exit()     End Sub End Class 

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