ErrorAddDataBoundRowEventHandler 委托

  • 项目

表示处理 ErrorAddDataBoundRow 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 ErrorAddDataBoundRowEventHandler ( _
    sender As Object, _
    e As ErrorAddDataBoundRowEventArgs _
)

public delegate void ErrorAddDataBoundRowEventHandler(
    Object sender,
    ErrorAddDataBoundRowEventArgs e
)

参数

备注

创建 ErrorAddDataBoundRowEventHandler 委托时，标识将处理事件的方法。 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。 除非您移除委托，否则只要该事件发生，便会调用事件处理程序方法。 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。 然后创建一个 ErrorAddDataBoundRow 事件处理程序。 若要测试该事件，请向 ListObject 手动添加一个新行，并输入姓氏“Chan”和名字。 该事件处理程序将显示一条消息。

此示例针对的是文档级自定义项。

    WithEvents ErrorAddDataBoundRowList As _
        Microsoft.Office.Tools.Excel.ListObject
    Private Sub ListObject_ErrorAddDataBoundRow()
        ' 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"))

        Dim myUC As New UniqueConstraint("CustConstraint", _
            lastName)
        dt.Constraints.Add(myUC)

        ' 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.
        ErrorAddDataBoundRowList = _
            Me.Controls.AddListObject(Me.Range("A1"), _
            "ErrorAddDataBoundRowList")

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


    Private Sub List1_ErrorAddDataBoundRow(ByVal sender As Object, _
        ByVal e As Microsoft.Office.Tools.Excel.ErrorAddDataBoundRowEventArgs) _
        Handles ErrorAddDataBoundRowList.ErrorAddDataBoundRow
        MessageBox.Show("Last names must be unique.")

    End Sub


private void ListObject_ErrorAddDataBoundRow()
{
    // 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"));

    UniqueConstraint myUC = new UniqueConstraint( "CustConstraint", 
        lastName);
    dt.Constraints.Add(myUC);

    // 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.ErrorAddDataBoundRow += new 
        Microsoft.Office.Tools.Excel.
        ErrorAddDataBoundRowEventHandler(list1_ErrorAddDataBoundRow);
}

void list1_ErrorAddDataBoundRow(object sender, 
    Microsoft.Office.Tools.Excel.ErrorAddDataBoundRowEventArgs e)
{
    MessageBox.Show("Last names must be unique.");
}

请参见

参考

Microsoft.Office.Tools.Excel 命名空间