form1.vb

Visual.Basic.NET实用编程百例-47.6M.zip

Public Class Form1
    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 dispose 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 DataGrid1 As System.Windows.Forms.DataGrid
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents OleDbDataAdapter1 As System.Data.OleDb.OleDbDataAdapter
    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 OleDbConnection1 As System.Data.OleDb.OleDbConnection
    Friend WithEvents OleDbDataAdapter2 As System.Data.OleDb.OleDbDataAdapter
    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 DataSet11 As 控件数据绑定.DataSet1
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.DataGrid1 = New System.Windows.Forms.DataGrid
        Me.Button1 = New System.Windows.Forms.Button
        Me.OleDbDataAdapter1 = New System.Data.OleDb.OleDbDataAdapter
        Me.OleDbSelectCommand1 = New System.Data.OleDb.OleDbCommand
        Me.OleDbInsertCommand1 = New System.Data.OleDb.OleDbCommand
        Me.OleDbUpdateCommand1 = New System.Data.OleDb.OleDbCommand
        Me.OleDbDeleteCommand1 = New System.Data.OleDb.OleDbCommand
        Me.OleDbConnection1 = New System.Data.OleDb.OleDbConnection
        Me.OleDbDataAdapter2 = New System.Data.OleDb.OleDbDataAdapter
        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.DataSet11 = New 控件数据绑定.DataSet1
        CType(Me.DataGrid1, System.ComponentModel.ISupportInitialize).BeginInit()
        CType(Me.DataSet11, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        '
        'DataGrid1
        '
        Me.DataGrid1.DataMember = ""
        Me.DataGrid1.DataSource = Me.DataSet11
        Me.DataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText
        Me.DataGrid1.Location = New System.Drawing.Point(8, 8)
        Me.DataGrid1.Name = "DataGrid1"
        Me.DataGrid1.Size = New System.Drawing.Size(272, 200)
        Me.DataGrid1.TabIndex = 0
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(88, 216)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(100, 30)
        Me.Button1.TabIndex = 1
        Me.Button1.Text = "加载数据"
        '
        'OleDbDataAdapter1
        '
        Me.OleDbDataAdapter1.DeleteCommand = Me.OleDbDeleteCommand1
        Me.OleDbDataAdapter1.InsertCommand = Me.OleDbInsertCommand1
        Me.OleDbDataAdapter1.SelectCommand = Me.OleDbSelectCommand1
        Me.OleDbDataAdapter1.TableMappings.AddRange(New System.Data.Common.DataTableMapping() {New System.Data.Common.DataTableMapping("Table", "Order", New System.Data.Common.DataColumnMapping() {New System.Data.Common.DataColumnMapping("CustomerID", "CustomerID"), New System.Data.Common.DataColumnMapping("OrderDate", "OrderDate"), New System.Data.Common.DataColumnMapping("OrderID", "OrderID")})})
        Me.OleDbDataAdapter1.UpdateCommand = Me.OleDbUpdateCommand1
        '
        'OleDbSelectCommand1
        '
        Me.OleDbSelectCommand1.CommandText = "SELECT CustomerID, OrderDate, OrderID FROM [Order]"
        Me.OleDbSelectCommand1.Connection = Me.OleDbConnection1
        '
        'OleDbInsertCommand1
        '
        Me.OleDbInsertCommand1.CommandText = "INSERT INTO [Order] (CustomerID, OrderDate, OrderID) VALUES (?, ?, ?)"
        Me.OleDbInsertCommand1.Connection = Me.OleDbConnection1
        Me.OleDbInsertCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("CustomerID", System.Data.OleDb.OleDbType.VarWChar, 50, "CustomerID"))
        Me.OleDbInsertCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("OrderDate", System.Data.OleDb.OleDbType.VarWChar, 50, "OrderDate"))
        Me.OleDbInsertCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("OrderID", System.Data.OleDb.OleDbType.VarWChar, 50, "OrderID"))
        '
        'OleDbUpdateCommand1
        '
        Me.OleDbUpdateCommand1.CommandText = "UPDATE [Order] SET CustomerID = ?, OrderDate = ?, OrderID = ? WHERE (OrderID = ?)" & _
        " AND (CustomerID = ? OR ? IS NULL AND CustomerID IS NULL) AND (OrderDate = ? OR " & _
        "? IS NULL AND OrderDate IS NULL)"
        Me.OleDbUpdateCommand1.Connection = Me.OleDbConnection1
        Me.OleDbUpdateCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("CustomerID", System.Data.OleDb.OleDbType.VarWChar, 50, "CustomerID"))
        Me.OleDbUpdateCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("OrderDate", System.Data.OleDb.OleDbType.VarWChar, 50, "OrderDate"))
        Me.OleDbUpdateCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("OrderID", System.Data.OleDb.OleDbType.VarWChar, 50, "OrderID"))
        Me.OleDbUpdateCommand1.Parameters.Add(New System.Data.OleDb.OleDbParameter("Original_OrderID", System.Data.OleDb.OleDbType.VarWChar, 50, System.Data.ParameterDirection.Input, False, CType(0, Byte), CType(0, Byte), "OrderID", System.Data.DataRowVersion.Original, Nothing))