dataset1.vb

这是我用VB和SQL制作的教材购销系统,希望大家提出宝贵意见.

        Private tableqsdj As qsdjDataTable
        
        Friend Sub New(ByVal rb As DataRowBuilder)
            MyBase.New(rb)
            Me.tableqsdj = CType(Me.Table,qsdjDataTable)
        End Sub
        
        Public Property 书名 As String
            Get
                Try 
                    Return CType(Me(Me.tableqsdj.书名Column),String)
                Catch e As InvalidCastException
                    Throw New StrongTypingException("无法获取值，因为它是 DBNull。", e)
                End Try
            End Get
            Set
                Me(Me.tableqsdj.书名Column) = value
            End Set
        End Property
        
        Public Property 姓名 As String
            Get
                Try 
                    Return CType(Me(Me.tableqsdj.姓名Column),String)
                Catch e As InvalidCastException
                    Throw New StrongTypingException("无法获取值，因为它是 DBNull。", e)
                End Try
            End Get
            Set
                Me(Me.tableqsdj.姓名Column) = value
            End Set
        End Property
        
        Public Property 数量 As String
            Get
                Try 
                    Return CType(Me(Me.tableqsdj.数量Column),String)
                Catch e As InvalidCastException
                    Throw New StrongTypingException("无法获取值，因为它是 DBNull。", e)
                End Try
            End Get
            Set
                Me(Me.tableqsdj.数量Column) = value
            End Set
        End Property
        
        Public Property 书号 As String
            Get
                Return CType(Me(Me.tableqsdj.书号Column),String)
            End Get
            Set
                Me(Me.tableqsdj.书号Column) = value
            End Set
        End Property
        
        Public Function Is书名Null() As Boolean
            Return Me.IsNull(Me.tableqsdj.书名Column)
        End Function
        
        Public Sub Set书名Null()
            Me(Me.tableqsdj.书名Column) = System.Convert.DBNull
        End Sub
        
        Public Function Is姓名Null() As Boolean
            Return Me.IsNull(Me.tableqsdj.姓名Column)
        End Function
        
        Public Sub Set姓名Null()
            Me(Me.tableqsdj.姓名Column) = System.Convert.DBNull
        End Sub
        
        Public Function Is数量Null() As Boolean
            Return Me.IsNull(Me.tableqsdj.数量Column)
        End Function
        
        Public Sub Set数量Null()
            Me(Me.tableqsdj.数量Column) = System.Convert.DBNull
        End Sub
    End Class
    
    <System.Diagnostics.DebuggerStepThrough()>  _
    Public Class qsdjRowChangeEvent
        Inherits EventArgs
        
        Private eventRow As qsdjRow
        
        Private eventAction As DataRowAction
        
        Public Sub New(ByVal row As qsdjRow, ByVal action As DataRowAction)
            MyBase.New
            Me.eventRow = row
            Me.eventAction = action
        End Sub
        
        Public ReadOnly Property Row As qsdjRow
            Get
                Return Me.eventRow
            End Get
        End Property
        
        Public ReadOnly Property Action As DataRowAction
            Get
                Return Me.eventAction
            End Get
        End Property
    End Class
    
    <System.Diagnostics.DebuggerStepThrough()>  _
    Public Class jcclDataTable
        Inherits DataTable
        Implements System.Collections.IEnumerable
        
        Private column书名 As DataColumn
        
        Private column单价 As DataColumn
        
        Private column存储数量 As DataColumn
        
        Private column书号 As DataColumn
        
        Friend Sub New()
            MyBase.New("jccl")
            Me.InitClass
        End Sub
        
        Friend Sub New(ByVal table As DataTable)
            MyBase.New(table.TableName)
            If (table.CaseSensitive <> table.DataSet.CaseSensitive) Then
                Me.CaseSensitive = table.CaseSensitive
            End If
            If (table.Locale.ToString <> table.DataSet.Locale.ToString) Then
                Me.Locale = table.Locale
            End If
            If (table.Namespace <> table.DataSet.Namespace) Then
                Me.Namespace = table.Namespace
            End If
            Me.Prefix = table.Prefix
            Me.MinimumCapacity = table.MinimumCapacity
            Me.DisplayExpression = table.DisplayExpression
        End Sub
        
        <System.ComponentModel.Browsable(false)>  _
        Public ReadOnly Property Count As Integer
            Get
                Return Me.Rows.Count
            End Get
        End Property
        
        Friend ReadOnly Property 书名Column As DataColumn
            Get
                Return Me.column书名
            End Get
        End Property
        
        Friend ReadOnly Property 单价Column As DataColumn
            Get
                Return Me.column单价
            End Get
        End Property
        
        Friend ReadOnly Property 存储数量Column As DataColumn
            Get
                Return Me.column存储数量
            End Get
        End Property
        
        Friend ReadOnly Property 书号Column As DataColumn
            Get
                Return Me.column书号
            End Get
        End Property
        
        Public Default ReadOnly Property Item(ByVal index As Integer) As jcclRow
            Get
                Return CType(Me.Rows(index),jcclRow)
            End Get
        End Property
        
        Public Event jcclRowChanged As jcclRowChangeEventHandler
        
        Public Event jcclRowChanging As jcclRowChangeEventHandler
        
        Public Event jcclRowDeleted As jcclRowChangeEventHandler
        
        Public Event jcclRowDeleting As jcclRowChangeEventHandler
        
        Public Overloads Sub AddjcclRow(ByVal row As jcclRow)
            Me.Rows.Add(row)
        End Sub
        
        Public Overloads Function AddjcclRow(ByVal 书名 As String, ByVal 单价 As Decimal, ByVal 存储数量 As Integer, ByVal 书号 As String) As jcclRow
            Dim rowjcclRow As jcclRow = CType(Me.NewRow,jcclRow)
            rowjcclRow.ItemArray = New Object() {书名, 单价, 存储数量, 书号}
            Me.Rows.Add(rowjcclRow)
            Return rowjcclRow
        End Function
        
        Public Function FindBy书号(ByVal 书号 As String) As jcclRow
            Return CType(Me.Rows.Find(New Object() {书号}),jcclRow)
        End Function
        
        Public Function GetEnumerator() As System.Collections.IEnumerator Implements System.Collections.IEnumerable.GetEnumerator
            Return Me.Rows.GetEnumerator
        End Function
        
        Public Overrides Function Clone() As DataTable
            Dim cln As jcclDataTable = CType(MyBase.Clone,jcclDataTable)
            cln.InitVars
            Return cln
        End Function
        
        Protected Overrides Function CreateInstance() As DataTable
            Return New jcclDataTable
        End Function
        
        Friend Sub InitVars()
            Me.column书名 = Me.Columns("书名")
            Me.column单价 = Me.Columns("单价")
            Me.column存储数量 = Me.Columns("存储数量")
            Me.column书号 = Me.Columns("书号")
        End Sub
        
        Private Sub InitClass()
            Me.column书名 = New DataColumn("书名", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.column书名)
            Me.column单价 = New DataColumn("单价", GetType(System.Decimal), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.column单价)
            Me.column存储数量 = New DataColumn("存储数量", GetType(System.Int32), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.column存储数量)
            Me.column书号 = New DataColumn("书号", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.column书号)
            Me.Constraints.Add(New UniqueConstraint("Constraint1", New DataColumn() {Me.column书号}, true))
            Me.column书号.AllowDBNull = false
            Me.column书号.Unique = true
        End Sub
        
        Public Function NewjcclRow() As jcclRow
            Return CType(Me.NewRow,jcclRow)
        End Function
        
        Protected Overrides Function NewRowFromBuilder(ByVal builder As DataRowBuilder) As DataRow
            Return New jcclRow(builder)
        End Function
        
        Protected Overrides Function GetRowType() As System.Type
            Return GetType(jcclRow)
        End Function
        
        Protected Overrides Sub OnRowChanged(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowChanged(e)
            If (Not (Me.jcclRowChangedEvent) Is Nothing) Then
                RaiseEvent jcclRowChanged(Me, New jcclRowChangeEvent(CType(e.Row,jcclRow), e.Action))
            End If
        End Sub
        
        Protected Overrides Sub OnRowChanging(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowChanging(e)
            If (Not (Me.jcclRowChangingEvent) Is Nothing) Then
                RaiseEvent jcclRowChanging(Me, New jcclRowChangeEvent(CType(e.Row,jcclRow), e.Action))
            End If
        End Sub
        
        Protected Overrides Sub OnRowDeleted(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowDeleted(e)
            If (Not (Me.jcclRowDeletedEvent) Is Nothing) Then
                RaiseEvent jcclRowDeleted(Me, New jcclRowChangeEvent(CType(e.Row,jcclRow), e.Action))
            End If
        End Sub
        
        Protected Overrides Sub OnRowDeleting(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowDeleting(e)
            If (Not (Me.jcclRowDeletingEvent) Is Nothing) Then
                RaiseEvent jcclRowDeleting(Me, New jcclRowChangeEvent(CType(e.Row,jcclRow), e.Action))
            End If
        End Sub
        
        Public Sub RemovejcclRow(ByVal row As jcclRow)
            Me.Rows.Remove(row)
        End Sub
    End Class
    
    <System.Diagnostics.DebuggerStepThrough()>  _
    Public Class jcclRow
        Inherits DataRow
        
        Private tablejccl As jcclDataTable
        
        Friend Sub New(ByVal rb As DataRowBuilder)
            MyBase.New(rb)
            Me.tablejccl = CType(Me.Table,jcclDataTable)
        End Sub
        
        Public Property 书名 As String
            Get
                Try 
                    Return CType(Me(Me.tablejccl.书名Column),String)
                Catch e As InvalidCastException
                    Throw New StrongTypingException("无法获取值，因为它是 DBNull。", e)
                End Try
            End Get
            Set
                Me(Me.tablejccl.书名Column) = value
            End Set
        End Property
        
        Public Property 单价 As Decimal
            Get
                Try 
                    Return CType(Me(Me.tablejccl.单价Column),Decimal)
                Catch e As InvalidCastException
                    Throw New StrongTypingException("无法获取值，因为它是 DBNull。", e)
                End Try
            End Get
            Set
                Me(Me.tablejccl.单价Column) = value
            End Set
        End Property
        
        Public Property 存储数量 As Integer
            Get
                Try 
                    Return CType(Me(Me.tablejccl.存储数量Column),Integer)
                Catch e As InvalidCastException
                    Throw New StrongTypingException("无法获取值，因为它是 DBNull。", e)
                End Try
            End Get
            Set
                Me(Me.tablejccl.存储数量Column) = value
            End Set
        End Property
        
        Public Property 书号 As String
            Get
                Return CType(Me(Me.tablejccl.书号Column),String)
            End Get
            Set
                Me(Me.tablejccl.书号Column) = value
            End Set
        End Property
        
        Public Function Is书名Null() As Boolean
            Return Me.IsNull(Me.tablejccl.书名Column)
        End Function
        
        Public Sub Set书名Null()
            Me(Me.tablejccl.书名Column) = System.Convert.DBNull
        End Sub
        
        Public Function Is单价Null() As Boolean
            Return Me.IsNull(Me.tablejccl.单价Column)
        End Function
        
        Public Sub Set单价Null()
            Me(Me.tablejccl.单价Column) = System.Convert.DBNull
        End Sub
        
        Public Function Is存储数量Null() As Boolean
            Return Me.IsNull(Me.tablejccl.存储数量Column)
        End Function
        
        Public Sub Set存储数量Null()
            Me(Me.tablejccl.存储数量Column) = System.Convert.DBNull
        End Sub
    End Class
    
    <System.Diagnostics.DebuggerStepThrough()>  _
    Public Class jcclRowChangeEvent
        Inherits EventArgs
        
        Private eventRow As jcclRow
        
        Private eventAction As DataRowAction