myds.vb

vb 应用实例 简单应用 ddddddddddddddddddddddddddddddddd

'------------------------------------------------------------------------------
' <autogenerated>
'     This code was generated by a tool.
'     Runtime Version: 1.0.3705.0
'
'     Changes to this file may cause incorrect behavior and will be lost if 
'     the code is regenerated.
' </autogenerated>
'------------------------------------------------------------------------------

Option Strict Off
Option Explicit On

Imports System
Imports System.Data
Imports System.Runtime.Serialization
Imports System.Xml


<Serializable(),  _
 System.ComponentModel.DesignerCategoryAttribute("code"),  _
 System.Diagnostics.DebuggerStepThrough(),  _
 System.ComponentModel.ToolboxItem(true)>  _
Public Class MyDS
    Inherits DataSet
    
    Private tableProducts As ProductsDataTable
    
    Private tableCategories As CategoriesDataTable
    
    Private relation分类代号 As DataRelation
    
    Public Sub New()
        MyBase.New
        Me.InitClass
        Dim schemaChangedHandler As System.ComponentModel.CollectionChangeEventHandler = AddressOf Me.SchemaChanged
        AddHandler Me.Tables.CollectionChanged, schemaChangedHandler
        AddHandler Me.Relations.CollectionChanged, schemaChangedHandler
    End Sub
    
    Protected Sub New(ByVal info As SerializationInfo, ByVal context As StreamingContext)
        MyBase.New
        Dim strSchema As String = CType(info.GetValue("XmlSchema", GetType(System.String)),String)
        If (Not (strSchema) Is Nothing) Then
            Dim ds As DataSet = New DataSet
            ds.ReadXmlSchema(New XmlTextReader(New System.IO.StringReader(strSchema)))
            If (Not (ds.Tables("Products")) Is Nothing) Then
                Me.Tables.Add(New ProductsDataTable(ds.Tables("Products")))
            End If
            If (Not (ds.Tables("Categories")) Is Nothing) Then
                Me.Tables.Add(New CategoriesDataTable(ds.Tables("Categories")))
            End If
            Me.DataSetName = ds.DataSetName
            Me.Prefix = ds.Prefix
            Me.Namespace = ds.Namespace
            Me.Locale = ds.Locale
            Me.CaseSensitive = ds.CaseSensitive
            Me.EnforceConstraints = ds.EnforceConstraints
            Me.Merge(ds, false, System.Data.MissingSchemaAction.Add)
            Me.InitVars
        Else
            Me.InitClass
        End If
        Me.GetSerializationData(info, context)
        Dim schemaChangedHandler As System.ComponentModel.CollectionChangeEventHandler = AddressOf Me.SchemaChanged
        AddHandler Me.Tables.CollectionChanged, schemaChangedHandler
        AddHandler Me.Relations.CollectionChanged, schemaChangedHandler
    End Sub
    
    <System.ComponentModel.Browsable(false),  _
     System.ComponentModel.DesignerSerializationVisibilityAttribute(System.ComponentModel.DesignerSerializationVisibility.Content)>  _
    Public ReadOnly Property Products As ProductsDataTable
        Get
            Return Me.tableProducts
        End Get
    End Property
    
    <System.ComponentModel.Browsable(false),  _
     System.ComponentModel.DesignerSerializationVisibilityAttribute(System.ComponentModel.DesignerSerializationVisibility.Content)>  _
    Public ReadOnly Property Categories As CategoriesDataTable
        Get
            Return Me.tableCategories
        End Get
    End Property
    
    Public Overrides Function Clone() As DataSet
        Dim cln As MyDS = CType(MyBase.Clone,MyDS)
        cln.InitVars
        Return cln
    End Function
    
    Protected Overrides Function ShouldSerializeTables() As Boolean
        Return false
    End Function
    
    Protected Overrides Function ShouldSerializeRelations() As Boolean
        Return false
    End Function
    
    Protected Overrides Sub ReadXmlSerializable(ByVal reader As XmlReader)
        Me.Reset
        Dim ds As DataSet = New DataSet
        ds.ReadXml(reader)
        If (Not (ds.Tables("Products")) Is Nothing) Then
            Me.Tables.Add(New ProductsDataTable(ds.Tables("Products")))
        End If
        If (Not (ds.Tables("Categories")) Is Nothing) Then
            Me.Tables.Add(New CategoriesDataTable(ds.Tables("Categories")))
        End If
        Me.DataSetName = ds.DataSetName
        Me.Prefix = ds.Prefix
        Me.Namespace = ds.Namespace
        Me.Locale = ds.Locale
        Me.CaseSensitive = ds.CaseSensitive
        Me.EnforceConstraints = ds.EnforceConstraints
        Me.Merge(ds, false, System.Data.MissingSchemaAction.Add)
        Me.InitVars
    End Sub
    
    Protected Overrides Function GetSchemaSerializable() As System.Xml.Schema.XmlSchema
        Dim stream As System.IO.MemoryStream = New System.IO.MemoryStream
        Me.WriteXmlSchema(New XmlTextWriter(stream, Nothing))
        stream.Position = 0
        Return System.Xml.Schema.XmlSchema.Read(New XmlTextReader(stream), Nothing)
    End Function
    
    Friend Sub InitVars()
        Me.tableProducts = CType(Me.Tables("Products"),ProductsDataTable)
        If (Not (Me.tableProducts) Is Nothing) Then
            Me.tableProducts.InitVars
        End If
        Me.tableCategories = CType(Me.Tables("Categories"),CategoriesDataTable)
        If (Not (Me.tableCategories) Is Nothing) Then
            Me.tableCategories.InitVars
        End If
        Me.relation分类代号 = Me.Relations("分类代号")
    End Sub
    
    Private Sub InitClass()
        Me.DataSetName = "MyDS"
        Me.Prefix = ""
        Me.Namespace = "http://www.tempuri.org/MyDS.xsd"
        Me.Locale = New System.Globalization.CultureInfo("zh-CN")
        Me.CaseSensitive = false
        Me.EnforceConstraints = true
        Me.tableProducts = New ProductsDataTable
        Me.Tables.Add(Me.tableProducts)
        Me.tableCategories = New CategoriesDataTable
        Me.Tables.Add(Me.tableCategories)
        Dim fkc As ForeignKeyConstraint
        fkc = New ForeignKeyConstraint("分类代号", New DataColumn() {Me.tableCategories.CategoryIDColumn}, New DataColumn() {Me.tableProducts.CategoryIDColumn})
        Me.tableProducts.Constraints.Add(fkc)
        fkc.AcceptRejectRule = AcceptRejectRule.None
        fkc.DeleteRule = Rule.Cascade
        fkc.UpdateRule = Rule.Cascade
        Me.relation分类代号 = New DataRelation("分类代号", New DataColumn() {Me.tableCategories.CategoryIDColumn}, New DataColumn() {Me.tableProducts.CategoryIDColumn}, false)
        Me.Relations.Add(Me.relation分类代号)
    End Sub
    
    Private Function ShouldSerializeProducts() As Boolean
        Return false
    End Function
    
    Private Function ShouldSerializeCategories() As Boolean
        Return false
    End Function
    
    Private Sub SchemaChanged(ByVal sender As Object, ByVal e As System.ComponentModel.CollectionChangeEventArgs)
        If (e.Action = System.ComponentModel.CollectionChangeAction.Remove) Then
            Me.InitVars
        End If
    End Sub
    
    Public Delegate Sub ProductsRowChangeEventHandler(ByVal sender As Object, ByVal e As ProductsRowChangeEvent)
    
    Public Delegate Sub CategoriesRowChangeEventHandler(ByVal sender As Object, ByVal e As CategoriesRowChangeEvent)
    
    <System.Diagnostics.DebuggerStepThrough()>  _
    Public Class ProductsDataTable
        Inherits DataTable
        Implements System.Collections.IEnumerable
        
        Private columnProductID As DataColumn
        
        Private columnProductName As DataColumn
        
        Private columnSupplierID As DataColumn
        
        Private columnCategoryID As DataColumn
        
        Private columnQuantityPerUnit As DataColumn
        
        Private columnUnitPrice As DataColumn
        
        Private columnUnitsInStock As DataColumn
        
        Private columnUnitsOnOrder As DataColumn
        
        Private columnReorderLevel As DataColumn
        
        Private columnDiscontinued As DataColumn
        
        Friend Sub New()
            MyBase.New("Products")
            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 ProductIDColumn As DataColumn
            Get
                Return Me.columnProductID
            End Get
        End Property
        
        Friend ReadOnly Property ProductNameColumn As DataColumn
            Get
                Return Me.columnProductName
            End Get
        End Property
        
        Friend ReadOnly Property SupplierIDColumn As DataColumn
            Get
                Return Me.columnSupplierID
            End Get
        End Property
        
        Friend ReadOnly Property CategoryIDColumn As DataColumn
            Get
                Return Me.columnCategoryID
            End Get
        End Property
        
        Friend ReadOnly Property QuantityPerUnitColumn As DataColumn
            Get
                Return Me.columnQuantityPerUnit
            End Get
        End Property
        
        Friend ReadOnly Property UnitPriceColumn As DataColumn
            Get
                Return Me.columnUnitPrice
            End Get
        End Property
        
        Friend ReadOnly Property UnitsInStockColumn As DataColumn
            Get
                Return Me.columnUnitsInStock
            End Get
        End Property
        
        Friend ReadOnly Property UnitsOnOrderColumn As DataColumn
            Get
                Return Me.columnUnitsOnOrder
            End Get
        End Property
        
        Friend ReadOnly Property ReorderLevelColumn As DataColumn
            Get
                Return Me.columnReorderLevel
            End Get
        End Property
        
        Friend ReadOnly Property DiscontinuedColumn As DataColumn
            Get
                Return Me.columnDiscontinued
            End Get
        End Property
        
        Public Default ReadOnly Property Item(ByVal index As Integer) As ProductsRow
            Get
                Return CType(Me.Rows(index),ProductsRow)
            End Get
        End Property
        
        Public Event ProductsRowChanged As ProductsRowChangeEventHandler
        
        Public Event ProductsRowChanging As ProductsRowChangeEventHandler
        
        Public Event ProductsRowDeleted As ProductsRowChangeEventHandler
        
        Public Event ProductsRowDeleting As ProductsRowChangeEventHandler
        
        Public Overloads Sub AddProductsRow(ByVal row As ProductsRow)
            Me.Rows.Add(row)
        End Sub