OriginalDataRestoredEventHandler 委派
表示處理 OriginalDataRestored 事件的方法。
命名空間: Microsoft.Office.Tools.Excel
組件: Microsoft.Office.Tools.Excel (在 Microsoft.Office.Tools.Excel.dll 中)
語法
'宣告
Public Delegate Sub OriginalDataRestoredEventHandler ( _
sender As Object, _
e As OriginalDataRestoredEventArgs _
)
public delegate void OriginalDataRestoredEventHandler(
Object sender,
OriginalDataRestoredEventArgs e
)
參數
- sender
型別:System.Object
事件來源。 事件來源。
- e
型別:Microsoft.Office.Tools.Excel.OriginalDataRestoredEventArgs
OriginalDataRestoredEventArgs ,包含事件資料。
備註
在建立 OriginalDataRestoredEventHandler 委派 (Delegate) 時,你要識別處理事件的方法。 若要使事件與您的事件處理常式產生關聯,請將委派的執行個體 (Instance) 加入至事件。 在您移除該委派之前,每當事件發生,就會呼叫事件處理常式。 如需委派的詳細資訊,請參閱事件和委派。
範例
下列程式碼範例會建立 DataTable 和 ListObject,並將 ListObject 繫結至 DataTable。 接著會建立 OriginalDataRestored 事件處理常式。 若要測試事件,請在工作表 1 的 ListObject 上方的資料行字母上按一下滑鼠右鍵,然後在捷徑功能表中按一下 [刪除]。 事件處理常式會取代資料行和資料行行首資料,並顯示一則訊息,指出還原了何種資料,以及為什麼要還原原始資料。
這是示範文件層級自訂的範例。
WithEvents OriginalDataRestoredList As _
Microsoft.Office.Tools.Excel.ListObject
Private Sub ListObject_OriginalDataRestored()
' Create a new DataSet and DataTable.
Dim ds As New DataSet()
Dim dt As DataTable = ds.Tables.Add("Customers")
Dim lastName As New DataColumn("LastName")
dt.Columns.Add(lastName)
dt.Columns.Add(New DataColumn("FirstName"))
' Add two new rows to the DataTable.
Dim dr1 As DataRow = dt.NewRow()
dr1("LastName") = "Chan"
dr1("FirstName") = "Gareth"
dt.Rows.Add(dr1)
Dim dr2 As DataRow = dt.NewRow()
dr2("LastName") = "Nitsche"
dr2("FirstName") = "Sonja"
dt.Rows.Add(dr2)
' Create a list object.
OriginalDataRestoredList = Me.Controls.AddListObject( _
Me.Range("A1"), "OriginalDataRestoredList")
' Bind the list object to the DataTable.
OriginalDataRestoredList.AutoSetDataBoundColumnHeaders = True
OriginalDataRestoredList.SetDataBinding(ds, "Customers", _
"LastName", "FirstName")
End Sub
Private Sub List1_OriginalDataRestored(ByVal sender As Object, _
ByVal e As Microsoft.Office.Tools.Excel.OriginalDataRestoredEventArgs) _
Handles OriginalDataRestoredList.OriginalDataRestored
MessageBox.Show("This data is bound to a data source and " & _
"will be restored. This change is: " & e.ChangeType.ToString() & _
". The reason is: " & e.ChangeReason.ToString() + ".")
End Sub
private void ListObject_OriginalDataRestored()
{
// Create a new DataSet and DataTable.
DataSet ds = new DataSet();
DataTable dt = ds.Tables.Add("Customers");
DataColumn lastName = new DataColumn("LastName");
dt.Columns.Add(lastName);
dt.Columns.Add(new DataColumn("FirstName"));
// Add two new rows to the DataTable.
DataRow dr1 = dt.NewRow();
dr1["LastName"] = "Chan";
dr1["FirstName"] = "Gareth";
dt.Rows.Add(dr1);
DataRow dr2 = dt.NewRow();
dr2["LastName"] = "Nitsche";
dr2["FirstName"] = "Sonja";
dt.Rows.Add(dr2);
// Create a list object.
Microsoft.Office.Tools.Excel.ListObject list1 =
this.Controls.AddListObject(
this.Range["A1", missing], "list1");
// Bind the list object to the DataTable.
list1.AutoSetDataBoundColumnHeaders = true;
list1.SetDataBinding(ds, "Customers", "LastName",
"FirstName");
// Create the event handler.
list1.OriginalDataRestored += new
Microsoft.Office.Tools.Excel.
OriginalDataRestoredEventHandler(list1_OriginalDataRestored);
}
void list1_OriginalDataRestored(object sender,
Microsoft.Office.Tools.Excel.OriginalDataRestoredEventArgs e)
{
MessageBox.Show("This data is bound to a data source and " +
"will be restored. This change is: " + e.ChangeType.ToString() +
". The reason is: " + e.ChangeReason.ToString() + ".");
}