form1.vb

编程之道VB.NETt程序设计入门-589M.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 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 SqlDataAdapter1 As System.Data.SqlClient.SqlDataAdapter
    Friend WithEvents DataSet11 As Case7_10.DataSet1
    Friend WithEvents btnDelete As System.Windows.Forms.Button
    Friend WithEvents btnSubmit As System.Windows.Forms.Button
    Friend WithEvents btnCancel As System.Windows.Forms.Button
    Friend WithEvents dgProducts As System.Windows.Forms.DataGrid
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.SqlSelectCommand1 = New System.Data.SqlClient.SqlCommand()
        Me.SqlConnection1 = New System.Data.SqlClient.SqlConnection()
        Me.SqlInsertCommand1 = New System.Data.SqlClient.SqlCommand()
        Me.SqlUpdateCommand1 = New System.Data.SqlClient.SqlCommand()
        Me.SqlDeleteCommand1 = New System.Data.SqlClient.SqlCommand()
        Me.SqlDataAdapter1 = New System.Data.SqlClient.SqlDataAdapter()
        Me.DataSet11 = New Case7_10.DataSet1()
        Me.dgProducts = New System.Windows.Forms.DataGrid()
        Me.btnDelete = New System.Windows.Forms.Button()
        Me.btnSubmit = New System.Windows.Forms.Button()
        Me.btnCancel = New System.Windows.Forms.Button()
        CType(Me.DataSet11, System.ComponentModel.ISupportInitialize).BeginInit()
        CType(Me.dgProducts, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        '
        'SqlSelectCommand1
        '
        Me.SqlSelectCommand1.CommandText = "SELECT ProductID, ProductName, SupplierID, CategoryID, QuantityPerUnit, UnitPrice" & _
        ", UnitsInStock, UnitsOnOrder, ReorderLevel, Discontinued FROM Products"
        Me.SqlSelectCommand1.Connection = Me.SqlConnection1
        '
        'SqlConnection1
        '
        Me.SqlConnection1.ConnectionString = "data source=THUNDERBIRD;initial catalog=Northwind;integrated security=SSPI;persis" & _
        "t security info=True;workstation id=THUNDERBIRD;packet size=4096"
        '
        'SqlInsertCommand1
        '
        Me.SqlInsertCommand1.CommandText = "INSERT INTO Products(ProductName, SupplierID, CategoryID, QuantityPerUnit, UnitPr" & _
        "ice, UnitsInStock, UnitsOnOrder, ReorderLevel, Discontinued) VALUES (@ProductNam" & _
        "e, @SupplierID, @CategoryID, @QuantityPerUnit, @UnitPrice, @UnitsInStock, @Units" & _
        "OnOrder, @ReorderLevel, @Discontinued); SELECT ProductID, ProductName, SupplierI" & _
        "D, CategoryID, QuantityPerUnit, UnitPrice, UnitsInStock, UnitsOnOrder, ReorderLe" & _
        "vel, Discontinued FROM Products WHERE (ProductID = @@IDENTITY)"
        Me.SqlInsertCommand1.Connection = Me.SqlConnection1
        Me.SqlInsertCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@ProductName", System.Data.SqlDbType.NVarChar, 40, "ProductName"))
        Me.SqlInsertCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@SupplierID", System.Data.SqlDbType.Int, 4, "SupplierID"))
        Me.SqlInsertCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@CategoryID", System.Data.SqlDbType.Int, 4, "CategoryID"))
        Me.SqlInsertCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@QuantityPerUnit", System.Data.SqlDbType.NVarChar, 20, "QuantityPerUnit"))
        Me.SqlInsertCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@UnitPrice", System.Data.SqlDbType.Money, 8, "UnitPrice"))
        Me.SqlInsertCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@UnitsInStock", System.Data.SqlDbType.SmallInt, 2, "UnitsInStock"))
        Me.SqlInsertCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@UnitsOnOrder", System.Data.SqlDbType.SmallInt, 2, "UnitsOnOrder"))
        Me.SqlInsertCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@ReorderLevel", System.Data.SqlDbType.SmallInt, 2, "ReorderLevel"))
        Me.SqlInsertCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@Discontinued", System.Data.SqlDbType.Bit, 1, "Discontinued"))
        '
        'SqlUpdateCommand1
        '
        Me.SqlUpdateCommand1.CommandText = "UPDATE Products SET ProductName = @ProductName, SupplierID = @SupplierID, Categor" & _
        "yID = @CategoryID, QuantityPerUnit = @QuantityPerUnit, UnitPrice = @UnitPrice, U" & _
        "nitsInStock = @UnitsInStock, UnitsOnOrder = @UnitsOnOrder, ReorderLevel = @Reord" & _
        "erLevel, Discontinued = @Discontinued WHERE (ProductID = @Original_ProductID) AN" & _
        "D (CategoryID = @Original_CategoryID OR @Original_CategoryID IS NULL AND Categor" & _
        "yID IS NULL) AND (Discontinued = @Original_Discontinued) AND (ProductName = @Ori" & _
        "ginal_ProductName) AND (QuantityPerUnit = @Original_QuantityPerUnit OR @Original" & _
        "_QuantityPerUnit IS NULL AND QuantityPerUnit IS NULL) AND (ReorderLevel = @Origi" & _
        "nal_ReorderLevel OR @Original_ReorderLevel IS NULL AND ReorderLevel IS NULL) AND" & _
        " (SupplierID = @Original_SupplierID OR @Original_SupplierID IS NULL AND Supplier" & _
        "ID IS NULL) AND (UnitPrice = @Original_UnitPrice OR @Original_UnitPrice IS NULL " & _
        "AND UnitPrice IS NULL) AND (UnitsInStock = @Original_UnitsInStock OR @Original_U" & _
        "nitsInStock IS NULL AND UnitsInStock IS NULL) AND (UnitsOnOrder = @Original_Unit" & _
        "sOnOrder OR @Original_UnitsOnOrder IS NULL AND UnitsOnOrder IS NULL); SELECT Pro" & _
        "ductID, ProductName, SupplierID, CategoryID, QuantityPerUnit, UnitPrice, UnitsIn" & _
        "Stock, UnitsOnOrder, ReorderLevel, Discontinued FROM Products WHERE (ProductID =" & _
        " @ProductID)"
        Me.SqlUpdateCommand1.Connection = Me.SqlConnection1
        Me.SqlUpdateCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@ProductName", System.Data.SqlDbType.NVarChar, 40, "ProductName"))
        Me.SqlUpdateCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@SupplierID", System.Data.SqlDbType.Int, 4, "SupplierID"))
        Me.SqlUpdateCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@CategoryID", System.Data.SqlDbType.Int, 4, "CategoryID"))
        Me.SqlUpdateCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@QuantityPerUnit", System.Data.SqlDbType.NVarChar, 20, "QuantityPerUnit"))
        Me.SqlUpdateCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@UnitPrice", System.Data.SqlDbType.Money, 8, "UnitPrice"))
        Me.SqlUpdateCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@UnitsInStock", System.Data.SqlDbType.SmallInt, 2, "UnitsInStock"))
        Me.SqlUpdateCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@UnitsOnOrder", System.Data.SqlDbType.SmallInt, 2, "UnitsOnOrder"))
        Me.SqlUpdateCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@ReorderLevel", System.Data.SqlDbType.SmallInt, 2, "ReorderLevel"))
        Me.SqlUpdateCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@Discontinued", System.Data.SqlDbType.Bit, 1, "Discontinued"))
        Me.SqlUpdateCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@Original_ProductID", System.Data.SqlDbType.Int, 4, System.Data.ParameterDirection.Input, False, CType(0, Byte), CType(0, Byte), "ProductID", System.Data.DataRowVersion.Original, Nothing))
        Me.SqlUpdateCommand1.Parameters.Add(New System.Data.SqlClient.SqlParameter("@Original_CategoryID", System.Data.SqlDbType.Int, 4, System.Data.ParameterDirection.Input, False, CType(0, Byte), CType(0, Byte), "CategoryID", System.Data.DataRowVersion.Original, Nothing))