ListObject.BeforeAddDataBoundRow 事件 (2007 系統)

更新： 2008 年 7 月

在嘗試將新的列加入至繫結至資料的 ListObject 控制項之前發生。

命名空間：  Microsoft.Office.Tools.Excel
組件：  Microsoft.Office.Tools.Excel.v9.0 (在 Microsoft.Office.Tools.Excel.v9.0.dll 中)

語法

Public Event BeforeAddDataBoundRow As BeforeAddDataBoundRowEventHandler

Dim instance As ListObject
Dim handler As BeforeAddDataBoundRowEventHandler

AddHandler instance.BeforeAddDataBoundRow, handler

public event BeforeAddDataBoundRowEventHandler BeforeAddDataBoundRow

備註

這個事件只在 ListObject 控制項已繫結至資料時引發。

這個事件只在透過 Microsoft Office Excel 使用者介面加入新列時引發。當新列以程式設計方式加入時就不會引發事件。

可處理這個事件以執行額外的驗證，或取消新列的加入。

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 BeforeAddDataboundRow() 事件處理常式。若要測試此事件，請手動將新列加入至工作表 1 的 ListObject。事件處理常式會移除列並顯示訊息。

這是示範文件層級自訂的版本。

WithEvents BeforeAddDataBoundRowList As _
    Microsoft.Office.Tools.Excel.ListObject
Private Sub ListObject_BeforeAddDataBoundRow()
    ' Create a new DataSet and DataTable.
    Dim ds As New DataSet()
    Dim dt As DataTable = ds.Tables.Add("Customers")
    dt.Columns.Add(New DataColumn("LastName"))
    dt.Columns.Add(New DataColumn("FirstName"))

    ' Add a new row to the DataTable.
    Dim dr As DataRow = dt.NewRow()
    dr("LastName") = "Chan"
    dr("FirstName") = "Gareth"
    dt.Rows.Add(dr)

    ' Create a list object.
    BeforeAddDataBoundRowList = _
        Me.Controls.AddListObject(Me.Range("A1"), _
        "BeforeAddDataBoundRowList")

    ' Bind the list object to the DataTable.
    BeforeAddDataBoundRowList.AutoSetDataBoundColumnHeaders = True
    BeforeAddDataBoundRowList.SetDataBinding(ds, "Customers", _
        "LastName", "FirstName")
End Sub


Private Sub List1_BeforeAddDataBoundRow(ByVal sender As Object, _
    ByVal e As Microsoft.Office.Tools.Excel.BeforeAddDataBoundRowEventArgs) _
    Handles BeforeAddDataBoundRowList.BeforeAddDataBoundRow
    e.Cancel = True
    MessageBox.Show("This data is read-only.")

End Sub

private void ListObject_BeforeAddDataBoundRow()
{
    // Create a new DataSet and DataTable.
    DataSet ds = new DataSet();
    DataTable dt = ds.Tables.Add("Customers");
    dt.Columns.Add(new DataColumn("LastName"));
    dt.Columns.Add(new DataColumn("FirstName"));

    // Add a new row to the DataTable.
    DataRow dr = dt.NewRow();
    dr["LastName"] = "Chan";
    dr["FirstName"] = "Gareth";
    dt.Rows.Add(dr);

    // 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.BeforeAddDataBoundRow += new 
        Microsoft.Office.Tools.Excel.
        BeforeAddDataBoundRowEventHandler(
        list1_BeforeAddDataBoundRow);
}

void list1_BeforeAddDataBoundRow(object sender, 
    Microsoft.Office.Tools.Excel.BeforeAddDataBoundRowEventArgs e)
{
    e.Cancel = true;
    MessageBox.Show("This data is read-only.");
}

這是示範應用程式層級增益集的版本。若要使用這個程式碼範例，請加入 using System.Data; 指示詞 (如果您使用的是 C#) 或 Imports System.Data 陳述式 (如果您使用的是 Visual Basic)。

WithEvents BeforeAddDataBoundRowList As ListObject
Private Sub ListObject_BeforeAddDataBoundRow()
    ' Create a new DataSet and DataTable.
    Dim ds As New DataSet()
    Dim dt As DataTable = ds.Tables.Add("Customers")
    dt.Columns.Add(New DataColumn("LastName"))
    dt.Columns.Add(New DataColumn("FirstName"))

    ' Add a new row to the DataTable.
    Dim dr As DataRow = dt.NewRow()
    dr("LastName") = "Chan"
    dr("FirstName") = "Gareth"
    dt.Rows.Add(dr)

    ' Create a list object.
    Dim vstoWorksheet As Worksheet = CType( _
        Me.Application.ActiveWorkbook.Worksheets(1),  _
        Excel.Worksheet).GetVstoObject()
    BeforeAddDataBoundRowList = _
        vstoWorksheet.Controls.AddListObject( _
        vstoWorksheet.Range("A1"), _
        "BeforeAddDataBoundRowList")

    ' Bind the list object to the DataTable.
    BeforeAddDataBoundRowList.AutoSetDataBoundColumnHeaders = True
    BeforeAddDataBoundRowList.SetDataBinding(ds, "Customers", _
        "LastName", "FirstName")
End Sub


Private Sub List1_BeforeAddDataBoundRow(ByVal sender As Object, _
    ByVal e As Microsoft.Office.Tools.Excel.BeforeAddDataBoundRowEventArgs) _
    Handles BeforeAddDataBoundRowList.BeforeAddDataBoundRow
    e.Cancel = True
    System.Windows.Forms.MessageBox.Show("This data is read-only.")

End Sub

private void ListObject_BeforeAddDataBoundRow()
{            
    // Create a new DataSet and DataTable.
    DataSet ds = new DataSet();
    DataTable dt = ds.Tables.Add("Customers");
    dt.Columns.Add(new DataColumn("LastName"));
    dt.Columns.Add(new DataColumn("FirstName"));

    // Add a new row to the DataTable.
    DataRow dr = dt.NewRow();
    dr["LastName"] = "Chan";
    dr["FirstName"] = "Gareth";
    dt.Rows.Add(dr);

    // Create a list object.
    Worksheet vstoWorksheet = ((Excel.Worksheet)
        this.Application.ActiveWorkbook.Worksheets[1]).GetVstoObject();
    ListObject list1 =
        vstoWorksheet.Controls.AddListObject(
        vstoWorksheet.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.BeforeAddDataBoundRow += new                
        BeforeAddDataBoundRowEventHandler(
        list1_BeforeAddDataBoundRow);
}

void list1_BeforeAddDataBoundRow(object sender,
    Microsoft.Office.Tools.Excel.BeforeAddDataBoundRowEventArgs e)
{
    e.Cancel = true;
    System.Windows.Forms.MessageBox.Show("This data is read-only.");
}

使用權限

• 完全信任立即呼叫者。這個成員無法供部分信任的程式碼使用。如需詳細資訊，請參閱從部分受信任程式碼使用程式庫。

請參閱

參考

ListObject 類別

ListObject 成員

Microsoft.Office.Tools.Excel 命名空間

變更記錄

日期	記錄	原因
2008 年 7 月	加入應用程式層級增益集的程式碼範例版本。	SP1 功能變更。