dataform1.vb

适合VB初学者看

Public Class DataForm1
    Inherits System.Windows.Forms.Form

#Region " Windows 窗体设计器生成的代码 "

    Public Sub New()
        MyBase.New()

        '该调用是 Windows 窗体设计器所必需的。
        InitializeComponent()

        '在 InitializeComponent() 调用之后添加任何初始化

    End Sub

    '窗体重写处置以清理组件列表。
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Windows 窗体设计器所必需的
    Private components As System.ComponentModel.IContainer

    '注意：以下过程是 Windows 窗体设计器所必需的
    '可以使用 Windows 窗体设计器修改此过程。
    '不要使用代码编辑器修改它。
    Friend WithEvents OleDbSelectCommand1 As System.Data.OleDb.OleDbCommand
    Friend WithEvents OleDbInsertCommand1 As System.Data.OleDb.OleDbCommand
    Friend WithEvents OleDbUpdateCommand1 As System.Data.OleDb.OleDbCommand
    Friend WithEvents OleDbDeleteCommand1 As System.Data.OleDb.OleDbCommand
    Friend WithEvents OleDbSelectCommand2 As System.Data.OleDb.OleDbCommand
    Friend WithEvents OleDbInsertCommand2 As System.Data.OleDb.OleDbCommand
    Friend WithEvents OleDbUpdateCommand2 As System.Data.OleDb.OleDbCommand
    Friend WithEvents OleDbDeleteCommand2 As System.Data.OleDb.OleDbCommand
    Friend WithEvents objdataset1 As 使用数据窗体向导.dataset1
    Friend WithEvents OleDbConnection1 As System.Data.OleDb.OleDbConnection
    Friend WithEvents OleDbDataAdapter1 As System.Data.OleDb.OleDbDataAdapter
    Friend WithEvents OleDbDataAdapter2 As System.Data.OleDb.OleDbDataAdapter
    Friend WithEvents btnLoad As System.Windows.Forms.Button
    Friend WithEvents btnUpdate As System.Windows.Forms.Button
    Friend WithEvents btnCancelAll As System.Windows.Forms.Button
    Friend WithEvents grdOrders As System.Windows.Forms.DataGrid
    Friend WithEvents objTableStylegrdOrdersOrders As System.Windows.Forms.DataGridTableStyle
    Friend WithEvents objColumnStylegrdOrdersOrderID As System.Windows.Forms.DataGridTextBoxColumn
    Friend WithEvents objColumnStylegrdOrdersCustomerID As System.Windows.Forms.DataGridTextBoxColumn
    Friend WithEvents objColumnStylegrdOrdersEmployeeID As System.Windows.Forms.DataGridTextBoxColumn
    Friend WithEvents objColumnStylegrdOrdersOrderDate As System.Windows.Forms.DataGridTextBoxColumn
    Friend WithEvents grdOrder_Details As System.Windows.Forms.DataGrid
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.OleDbSelectCommand1 = New System.Data.OleDb.OleDbCommand()
        Me.OleDbConnection1 = New System.Data.OleDb.OleDbConnection()
        Me.OleDbInsertCommand1 = New System.Data.OleDb.OleDbCommand()
        Me.OleDbUpdateCommand1 = New System.Data.OleDb.OleDbCommand()
        Me.OleDbDeleteCommand1 = New System.Data.OleDb.OleDbCommand()
        Me.OleDbSelectCommand2 = New System.Data.OleDb.OleDbCommand()
        Me.OleDbInsertCommand2 = New System.Data.OleDb.OleDbCommand()
        Me.OleDbUpdateCommand2 = New System.Data.OleDb.OleDbCommand()
        Me.OleDbDeleteCommand2 = New System.Data.OleDb.OleDbCommand()
        Me.objdataset1 = New 使用数据窗体向导.dataset1()
        Me.OleDbDataAdapter1 = New System.Data.OleDb.OleDbDataAdapter()
        Me.OleDbDataAdapter2 = New System.Data.OleDb.OleDbDataAdapter()
        Me.btnLoad = New System.Windows.Forms.Button()
        Me.btnUpdate = New System.Windows.Forms.Button()
        Me.btnCancelAll = New System.Windows.Forms.Button()
        Me.grdOrders = New System.Windows.Forms.DataGrid()
        Me.objTableStylegrdOrdersOrders = New System.Windows.Forms.DataGridTableStyle()
        Me.objColumnStylegrdOrdersOrderID = New System.Windows.Forms.DataGridTextBoxColumn()
        Me.objColumnStylegrdOrdersCustomerID = New System.Windows.Forms.DataGridTextBoxColumn()
        Me.objColumnStylegrdOrdersEmployeeID = New System.Windows.Forms.DataGridTextBoxColumn()
        Me.objColumnStylegrdOrdersOrderDate = New System.Windows.Forms.DataGridTextBoxColumn()
        Me.grdOrder_Details = New System.Windows.Forms.DataGrid()
        CType(Me.objdataset1, System.ComponentModel.ISupportInitialize).BeginInit()
        CType(Me.grdOrders, System.ComponentModel.ISupportInitialize).BeginInit()
        CType(Me.grdOrder_Details, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        '
        'OleDbSelectCommand1
        '
        Me.OleDbSelectCommand1.CommandText = "SELECT OrderID, CustomerID, EmployeeID, OrderDate, RequiredDate, ShippedDate, Shi" & _
        "pVia, Freight, ShipName, ShipAddress, ShipCity, ShipRegion, ShipPostalCode, Ship" & _
        "Country FROM Orders"
        Me.OleDbSelectCommand1.Connection = Me.OleDbConnection1
        '
        'OleDbConnection1
        '
        Me.OleDbConnection1.ConnectionString = "Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;Initial " & _
        "Catalog=Northwind;Data Source=LXW\NetSDK;Use Procedure for Prepare=1;Auto Transl" & _
        "ate=True;Packet Size=4096;Workstation ID=LXW;Use Encryption for Data=False;Tag w" & _
        "ith column collation when possible=False"
        '
        'OleDbInsertCommand1
        '
        Me.OleDbInsertCommand1.CommandText = "INSERT INTO Orders(CustomerID, EmployeeID, OrderDate, RequiredDate, ShippedDate, " & _
        "ShipVia, Freight, ShipName, ShipAddress, ShipCity, ShipRegion, ShipPostalCode, S" & _
        "hipCountry) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?); SELECT OrderID, Cust" & _
        "omerID, EmployeeID, OrderDate, RequiredDate, ShippedDate, ShipVia, Freight, Ship" & _
        "Name, ShipAddress, ShipCity, ShipRegion, ShipPostalCode, ShipCountry FROM Orders" & _
        " WHERE (OrderID = @@IDENTITY)"
        Me.OleDbInsertCommand1.Connection = Me.OleDbConnection1
        Me.OleDbInsertCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("CustomerID", System.Data.OleDb.OleDbType.VarWChar, 5, "CustomerID"))
        Me.OleDbInsertCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("EmployeeID", System.Data.OleDb.OleDbType.Integer, 4, "EmployeeID"))
        Me.OleDbInsertCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("OrderDate", System.Data.OleDb.OleDbType.DBTimeStamp, 8, "OrderDate"))
        Me.OleDbInsertCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("RequiredDate", System.Data.OleDb.OleDbType.DBTimeStamp, 8, "RequiredDate"))
        Me.OleDbInsertCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("ShippedDate", System.Data.OleDb.OleDbType.DBTimeStamp, 8, "ShippedDate"))
        Me.OleDbInsertCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("ShipVia", System.Data.OleDb.OleDbType.Integer, 4, "ShipVia"))
        Me.OleDbInsertCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("Freight", System.Data.OleDb.OleDbType.Currency, 8, "Freight"))
        Me.OleDbInsertCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("ShipName", System.Data.OleDb.OleDbType.VarWChar, 40, "ShipName"))
        Me.OleDbInsertCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("ShipAddress", System.Data.OleDb.OleDbType.VarWChar, 60, "ShipAddress"))
        Me.OleDbInsertCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("ShipCity", System.Data.OleDb.OleDbType.VarWChar, 15, "ShipCity"))
        Me.OleDbInsertCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("ShipRegion", System.Data.OleDb.OleDbType.VarWChar, 15, "ShipRegion"))
        Me.OleDbInsertCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("ShipPostalCode", System.Data.OleDb.OleDbType.VarWChar, 10, "ShipPostalCode"))
        Me.OleDbInsertCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("ShipCountry", System.Data.OleDb.OleDbType.VarWChar, 15, "ShipCountry"))
        '
        'OleDbUpdateCommand1
        '
        Me.OleDbUpdateCommand1.CommandText = "UPDATE Orders SET CustomerID = ?, EmployeeID = ?, OrderDate = ?, RequiredDate = ?" & _
        ", ShippedDate = ?, ShipVia = ?, Freight = ?, ShipName = ?, ShipAddress = ?, Ship" & _
        "City = ?, ShipRegion = ?, ShipPostalCode = ?, ShipCountry = ? WHERE (OrderID = ?" & _
        ") AND (CustomerID = ? OR ? IS NULL AND CustomerID IS NULL) AND (EmployeeID = ? O" & _
        "R ? IS NULL AND EmployeeID IS NULL) AND (Freight = ? OR ? IS NULL AND Freight IS" & _
        " NULL) AND (OrderDate = ? OR ? IS NULL AND OrderDate IS NULL) AND (RequiredDate " & _
        "= ? OR ? IS NULL AND RequiredDate IS NULL) AND (ShipAddress = ? OR ? IS NULL AND" & _
        " ShipAddress IS NULL) AND (ShipCity = ? OR ? IS NULL AND ShipCity IS NULL) AND (" & _