frmaddproduct.frm

这是一个用VB编写的用于外贸行业的供应商信息管理系统。

VERSION 5.00
Begin VB.Form frmAddProduct 
   BorderStyle     =   1  'Fixed Single
   Caption         =   "AddProduct"
   ClientHeight    =   7020
   ClientLeft      =   45
   ClientTop       =   330
   ClientWidth     =   12090
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   7020
   ScaleWidth      =   12090
   StartUpPosition =   3  '窗口缺省
   Begin VB.ListBox lstProduct 
      Height          =   4560
      Left            =   5520
      TabIndex        =   8
      Top             =   1320
      Width           =   6495
   End
   Begin VB.TextBox txtProductName 
      Height          =   375
      Left            =   6960
      TabIndex        =   7
      Top             =   840
      Width           =   5055
   End
   Begin VB.CommandButton btnBack 
      Caption         =   "Back"
      Height          =   375
      Left            =   6600
      TabIndex        =   6
      Top             =   6120
      Width           =   1095
   End
   Begin VB.CommandButton btnAdd 
      Caption         =   "Add"
      Default         =   -1  'True
      Height          =   375
      Left            =   4080
      TabIndex        =   4
      Top             =   6120
      Width           =   1095
   End
   Begin VB.TextBox txtCategoryName 
      Height          =   375
      Left            =   1440
      TabIndex        =   2
      Top             =   840
      Width           =   3975
   End
   Begin VB.ListBox lstCategory 
      Height          =   4560
      Left            =   0
      TabIndex        =   3
      Top             =   1320
      Width           =   5415
   End
   Begin VB.Label Label5 
      Alignment       =   2  'Center
      Caption         =   "Add      Product"
      BeginProperty Font 
         Name            =   "Arial"
         Size            =   14.25
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   -1  'True
         Strikethrough   =   0   'False
      EndProperty
      Height          =   375
      Left            =   3000
      TabIndex        =   5
      Top             =   240
      Width           =   5895
   End
   Begin VB.Label Label2 
      Caption         =   "product_name:"
      Height          =   375
      Left            =   5640
      TabIndex        =   1
      Top             =   840
      Width           =   1335
   End
   Begin VB.Label Label1 
      Caption         =   "category_name:"
      Height          =   375
      Left            =   120
      TabIndex        =   0
      Top             =   840
      Width           =   1335
   End
End
Attribute VB_Name = "frmAddProduct"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Public cn As New ADODB.Connection
Public rs1 As New ADODB.Recordset
Public rs2 As New ADODB.Recordset
Dim curPoint As Integer
Dim curPoint1 As Integer
Dim categoryName As String
Dim productName As String

Private Sub showCategoryData()
    Dim i As Integer
    rs1.Open "category", cn, adOpenKeyset, adLockOptimistic, adCmdTable
    For i = 1 To rs1.RecordCount
        lstCategory.AddItem (rs1.Fields("category_name"))
        rs1.MoveNext
    Next i
    rs1.Close
End Sub

Private Sub showProductData()
    categoryName = lstCategory.List(curPoint)
    txtCategoryName.Text = categoryName
    'clear listbox
    lstProduct.Clear
    'add fit's  items
    rs2.Open "select * from product where category_name='" & categoryName & "'", cn, adOpenDynamic
    While Not rs2.EOF
        lstProduct.AddItem (rs2.Fields("product_name"))
        rs2.MoveNext
    Wend
    rs2.Close
    txtProductName.Text = lstProduct.List(curPoint1)
    productName = txtProductName.Text
End Sub

Private Sub btnAdd_Click()
    rs1.Open "category", cn, adOpenKeyset, adLockOptimistic, adCmdTable
    rs2.Open "product", cn, adOpenKeyset, adLockOptimistic, adCmdTable
    If txtProductName.Text > "" Then
        rs2.Find "product_name='" & txtProductName.Text & "'"
        If Not rs2.EOF Then
            If rs2.Fields("category_name") = txtCategoryName.Text Then
                MsgBox "This product is already exist, can not be added!", vbExclamation, "add error"
                rs1.Close
                rs2.Close
                Exit Sub
            End If
        End If
        rs2.AddNew
        rs2.Fields("product_name") = txtProductName.Text
        rs2.Fields("category_name") = txtCategoryName.Text
        rs2.Update
        lstProduct.AddItem (txtProductName.Text)
        txtProductName.Text = ""
        txtProductName.SetFocus
    End If
    rs1.Close
    rs2.Close
End Sub

Private Sub btnBack_Click()
    Unload Me
End Sub

Private Sub Form_Activate()
    curPoint1 = 0
    curPoint = 0
    Set cn = New ADODB.Connection
    cn.Open strCn
    Set rs1 = New ADODB.Recordset
    Set rs2 = New ADODB.Recordset
    showCategoryData
    showProductData
End Sub

Private Sub Form_Unload(Cancel As Integer)
    cn.Close
End Sub

Private Sub lstproduct_Click()
    curPoint1 = lstProduct.ListIndex
    txtProductName.Text = lstProduct.List(curPoint1)
End Sub

Private Sub lstCategory_Click()
    curPoint = lstCategory.ListIndex
    showProductData
End Sub

Private Sub txtCategoryName_GotFocus()
    txtCategoryName.SelStart = 0
    txtCategoryName.SelLength = Len(txtCategoryName.Text)
End Sub

Private Sub txtproductName_GotFocus()
    txtProductName.SelStart = 0
    txtProductName.SelLength = Len(txtProductName.Text)
End Sub
Private Sub txtproductname_LostFocus()
    If Len(txtProductName.Text) > 50 Then
        MsgBox "the length of product name need less 50.", vbCritical, "over length error"
    End If
End Sub

Private Sub txtCategoryName_LostFocus()
    If Len(txtCategoryName.Text) > 50 Then
        MsgBox "the length of categoryname need less 50.", vbCritical, "over length error"
    End If
End Sub