ErrorAddDataBoundRowEventHandler Delegate

Definition

public delegate void ErrorAddDataBoundRowEventHandler(System::Object ^ sender, ErrorAddDataBoundRowEventArgs ^ e);

public delegate void ErrorAddDataBoundRowEventHandler(object sender, ErrorAddDataBoundRowEventArgs e);

type ErrorAddDataBoundRowEventHandler = delegate of obj * ErrorAddDataBoundRowEventArgs -> unit

Public Delegate Sub ErrorAddDataBoundRowEventHandler(sender As Object, e As ErrorAddDataBoundRowEventArgs)

Parameters

Examples

The following code example creates a DataTable and a ListObject, and binds the ListObject to the DataTable. It then creates an ErrorAddDataBoundRow event handler. To test the event, manually add a new row to the ListObject and enter the last name "Chan" and a first name. The event handler displays a message.

This example is for a document-level customization.

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"], "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.");
}

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

Remarks

When you create an ErrorAddDataBoundRowEventHandler delegate, you identify the method that will handle the event. To associate the event with your event handler, add an instance of the delegate to the event. The event handler method is called whenever the event occurs unless you remove the delegate.

Applies to