BeforeAddDataBoundRowEventHandler 委托

  • 项目

表示将要处理 ListObject 的 BeforeAddDataBoundRow 事件的方法。

命名空间：  Microsoft.Office.Tools.Excel
程序集：  Microsoft.Office.Tools.Excel（在 Microsoft.Office.Tools.Excel.dll 中）

语法

声明
Public Delegate Sub BeforeAddDataBoundRowEventHandler ( _
    sender As Object, _
    e As BeforeAddDataBoundRowEventArgs _
)

public delegate void BeforeAddDataBoundRowEventHandler(
    Object sender,
    BeforeAddDataBoundRowEventArgs e
)

参数

备注

当创建 BeforeAddDataBoundRowEventHandler 委托时，将标识处理事件的方法。 若要使该事件与事件处理程序相关联，请将该委托的一个实例添加到事件中。 每当事件出现时就调用事件处理程序，直到移除该委托。 有关委托的更多信息，请参见事件和委托。

示例

下面的代码示例创建一个 DataTable 和一个 ListObject，并将该 ListObject 绑定到该 DataTable。 然后该示例创建一个取消添加新行的 BeforeAddDataBoundRow 事件处理程序。 若要测试该事件，请手动向工作表 1 上的 ListObject 添加一个新行。

此示例针对的是文档级自定义项。

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.");
}

请参见

参考

Microsoft.Office.Tools.Excel 命名空间