form1.vb

本书分为五个部分

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

        '填充DataSet
        SqlDataAdapter1.Fill(DataSet11)

    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 SqlDataAdapter1 As System.Data.SqlClient.SqlDataAdapter
    Friend WithEvents SqlSelectCommand1 As System.Data.SqlClient.SqlCommand
    Friend WithEvents SqlInsertCommand1 As System.Data.SqlClient.SqlCommand
    Friend WithEvents SqlUpdateCommand1 As System.Data.SqlClient.SqlCommand
    Friend WithEvents SqlDeleteCommand1 As System.Data.SqlClient.SqlCommand
    Friend WithEvents SqlConnection1 As System.Data.SqlClient.SqlConnection
    Friend WithEvents DataSet11 As S21_07.DataSet1
    Friend WithEvents DataGrid1 As System.Windows.Forms.DataGrid
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.SqlDataAdapter1 = New System.Data.SqlClient.SqlDataAdapter()
        Me.SqlSelectCommand1 = New System.Data.SqlClient.SqlCommand()
        Me.SqlInsertCommand1 = New System.Data.SqlClient.SqlCommand()
        Me.SqlUpdateCommand1 = New System.Data.SqlClient.SqlCommand()
        Me.SqlDeleteCommand1 = New System.Data.SqlClient.SqlCommand()
        Me.SqlConnection1 = New System.Data.SqlClient.SqlConnection()
        Me.DataSet11 = New S21_07.DataSet1()
        Me.DataGrid1 = New System.Windows.Forms.DataGrid()
        CType(Me.DataSet11, System.ComponentModel.ISupportInitialize).BeginInit()
        CType(Me.DataGrid1, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        '
        'SqlDataAdapter1
        '
        Me.SqlDataAdapter1.DeleteCommand = Me.SqlDeleteCommand1
        Me.SqlDataAdapter1.InsertCommand = Me.SqlInsertCommand1
        Me.SqlDataAdapter1.SelectCommand = Me.SqlSelectCommand1
        Me.SqlDataAdapter1.TableMappings.AddRange(New System.Data.Common.DataTableMapping() {New System.Data.Common.DataTableMapping("Table", "Customers", New System.Data.Common.DataColumnMapping() {New System.Data.Common.DataColumnMapping("CustomerID", "CustomerID"), New System.Data.Common.DataColumnMapping("CompanyName", "CompanyName"), New System.Data.Common.DataColumnMapping("ContactName", "ContactName"), New System.Data.Common.DataColumnMapping("ContactTitle", "ContactTitle"), New System.Data.Common.DataColumnMapping("Address", "Address"), New System.Data.Common.DataColumnMapping("City", "City"), New System.Data.Common.DataColumnMapping("Region", "Region"), New System.Data.Common.DataColumnMapping("PostalCode", "PostalCode"), New System.Data.Common.DataColumnMapping("Country", "Country"), New System.Data.Common.DataColumnMapping("Phone", "Phone"), New System.Data.Common.DataColumnMapping("Fax", "Fax")})})
        Me.SqlDataAdapter1.UpdateCommand = Me.SqlUpdateCommand1
        '
        'SqlSelectCommand1
        '
        Me.SqlSelectCommand1.CommandText = "SELECT CustomerID, CompanyName, ContactName, ContactTitle, Address, City, Region," & _
        " PostalCode, Country, Phone, Fax FROM Customers"
        Me.SqlSelectCommand1.Connection = Me.SqlConnection1
        '
        'SqlInsertCommand1
        '
        Me.SqlInsertCommand1.CommandText = "INSERT INTO Customers(CustomerID, CompanyName, ContactName, ContactTitle, Address" & _
        ", City, Region, PostalCode, Country, Phone, Fax) VALUES (@CustomerID, @CompanyNa" & _
        "me, @ContactName, @ContactTitle, @Address, @City, @Region, @PostalCode, @Country" & _
        ", @Phone, @Fax); SELECT CustomerID, CompanyName, ContactName, ContactTitle, Addr" & _
        "ess, City, Region, PostalCode, Country, Phone, Fax FROM Customers WHERE (Custome" & _
        "rID = @CustomerID)"
        Me.SqlInsertCommand1.Connection = Me.SqlConnection1
        Me.SqlInsertCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@CustomerID", System.Data.SqlDbType.NVarChar, 5, "CustomerID"))
        Me.SqlInsertCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@CompanyName", System.Data.SqlDbType.NVarChar, 40, "CompanyName"))
        Me.SqlInsertCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@ContactName", System.Data.SqlDbType.NVarChar, 30, "ContactName"))
        Me.SqlInsertCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@ContactTitle", System.Data.SqlDbType.NVarChar, 30, "ContactTitle"))
        Me.SqlInsertCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@Address", System.Data.SqlDbType.NVarChar, 60, "Address"))
        Me.SqlInsertCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@City", System.Data.SqlDbType.NVarChar, 15, "City"))
        Me.SqlInsertCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@Region", System.Data.SqlDbType.NVarChar, 15, "Region"))
        Me.SqlInsertCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@PostalCode", System.Data.SqlDbType.NVarChar, 10, "PostalCode"))
        Me.SqlInsertCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@Country", System.Data.SqlDbType.NVarChar, 15, "Country"))
        Me.SqlInsertCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@Phone", System.Data.SqlDbType.NVarChar, 24, "Phone"))
        Me.SqlInsertCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@Fax", System.Data.SqlDbType.NVarChar, 24, "Fax"))
        '
        'SqlUpdateCommand1
        '
        Me.SqlUpdateCommand1.CommandText = "UPDATE Customers SET CustomerID = @CustomerID, CompanyName = @CompanyName, Contac" & _
        "tName = @ContactName, ContactTitle = @ContactTitle, Address = @Address, City = @" & _
        "City, Region = @Region, PostalCode = @PostalCode, Country = @Country, Phone = @P" & _
        "hone, Fax = @Fax WHERE (CustomerID = @Original_CustomerID) AND (Address = @Origi" & _
        "nal_Address OR @Original_Address IS NULL AND Address IS NULL) AND (City = @Origi" & _
        "nal_City OR @Original_City IS NULL AND City IS NULL) AND (CompanyName = @Origina" & _