ListObject.BeforeAddDataBoundRow 事件 (2007 system)

更新： 2008 年 7 月

恰好在尝试向绑定到数据的 ListObject 控件添加新行之前发生。

命名空间：  Microsoft.Office.Tools.Excel
程序集：  Microsoft.Office.Tools.Excel.v9.0（在 Microsoft.Office.Tools.Excel.v9.0.dll 中）

语法

声明
Public Event BeforeAddDataBoundRow As BeforeAddDataBoundRowEventHandler
用法
Dim instance As ListObject
Dim handler As BeforeAddDataBoundRowEventHandler

AddHandler instance.BeforeAddDataBoundRow, handler

public event BeforeAddDataBoundRowEventHandler BeforeAddDataBoundRow

备注

只有当 ListObject 控件绑定到数据时才引发此事件。

只有当新行是通过 Microsoft Office Excel 用户界面添加时才引发此事件。当新行是以编程方式添加时，将不引发此事件。

处理此事件以执行其他验证，或者取消添加行。

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。然后创建 BeforeAddDataboundRow() 事件处理程序。若要测试该事件，请向表 1 上的 ListObject 手动添加新行。此事件处理程序将移除该行并显示一条消息。

此版本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.");
}

此版本针对的是应用程序级外接程序。若要使用此代码示例，请添加 using System.Data; 指令（如果使用的是 C#）或者添加 Imports System.Data 语句（如果使用的是 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.");
}

权限

• 对直接调用方的完全信任。此成员不能由部分信任的代码使用。有关更多信息，请参见通过部分受信任的代码使用库。

另请参见

参考

ListObject 类

ListObject 成员

Microsoft.Office.Tools.Excel 命名空间

修订记录

日期	修订记录	原因
2008 年 7 月	添加了一个针对应用程序级外接程序的代码示例版本。	SP1 功能更改。