本文整理汇总了VB.NET中System.Data.DataTableCollection.CollectionChanged事件的典型用法代码示例。如果您正苦于以下问题：VB.NET DataTableCollection.CollectionChanged事件的具体用法？VB.NET DataTableCollection.CollectionChanged怎么用？VB.NET DataTableCollection.CollectionChanged使用的例子？那么恭喜您, 这里精选的事件代码示例或许可以为您提供帮助。您也可以进一步了解该事件所在类System.Data.DataTableCollection的用法示例。
在下文中一共展示了DataTableCollection.CollectionChanged事件的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的VB.NET代码示例。
示例1: TableCollectionCollectionChanged
Public Sub TableCollectionCollectionChanged()
' create a DataSet with two tables
Dim dataSet As New DataSet()
AddHandler dataSet.Tables.CollectionChanging, _
AddressOf Collection_Changed
' create Customer table
Dim custTable As New DataTable("Customers")
custTable.Columns.Add("customerId", _
System.Type.GetType("System.Integer")).AutoIncrement = True
custTable.Columns.Add("name", System.Type.GetType("System.String"))
custTable.PrimaryKey = New DataColumn() {custTable.Columns("customerId")}
' create Orders table
Dim orderTable As New DataTable("Orders")
orderTable.Columns.Add("orderId", _
System.Type.GetType("System.Integer")).AutoIncrement = True
orderTable.Columns.Add("customerId", System.Type.GetType("System.Integer"))
orderTable.Columns.Add("amount", System.Type.GetType("System.Double"))
orderTable.PrimaryKey = New DataColumn() {orderTable.Columns("orderId")}
dataSet.Tables.AddRange(New DataTable() {custTable, orderTable})
' Now remove all tables.
' First check to see if the table can be removed,
' then remove it from the collection.
'
' You cannot use a For Each loop when
' removing items from a collection.
Do While (dataSet.Tables.Count > 0)
Dim table As DataTable = dataSet.Tables(0)
If (dataSet.Tables.CanRemove(table)) Then
dataSet.Tables.RemoveAt(0)
End If
Loop
Console.WriteLine("dataSet has {0} tables", dataSet.Tables.Count)
End Sub
Private Sub Collection_Changed(ByVal sender As Object, _
ByVal e As System.ComponentModel.CollectionChangeEventArgs)
Console.WriteLine("Collection_Changed Event: '{0}'\table element={1}", _
e.Action.ToString(), e.Element.ToString())
End Sub