本文整理匯總了VB.NET中System.Data.DataTableCollection.CollectionChanged事件的典型用法代碼示例。如果您正苦於以下問題：VB.NET DataTableCollection.CollectionChanged事件的具體用法？VB.NET DataTableCollection.CollectionChanged怎麽用？VB.NET DataTableCollection.CollectionChanged使用的例子？那麽, 這裏精選的事件代碼示例或許可以為您提供幫助。您也可以進一步了解該事件所在類System.Data.DataTableCollection的用法示例。
在下文中一共展示了DataTableCollection.CollectionChanged事件的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的VB.NET代碼示例。
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