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Kevin Kingma
615
Removing Multiple Rows in Code via UltraDataSource
posted

Hi All:

     I have the following code behind a button's click event, which removes records from my UltraDataSource (bound to my UltraGrid) if the "Age" field is zero (or null):

 

        Dim uRow As UltraDataRow

            For Each uRow In UltraDataSource1.Rows
                If  (uRow("Age") Is DBNull.Value OrElse DirectCast(uRow("Age"), Integer) = 0) Then
                    'Delete the row and raise the Event
                    UltraDataSource1.Rows.Remove(uRow, True)
                End If
            Next

 

     The problem is that it deletes every OTHER row.  If I enter "0" for the Age in rows 1, 2, and 3, rows 1 and 3 will be deleted but row 2 will not.  If I enter "0" for the age in rows 1, 3, and 5, all three rows are deleted successfully.

     Any reason why it won't delete consecutive rows?

Kevin

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  • 12773
    posted


    Hello Kevin ,

    Here is a smple code how to remove items form ultradataSource. Fireing the event RowDeleted and
    and removing the item form external data will be sinchronized in this way:
    Me.externalData.Rows.RemoveAt(e.Row.Index)

    Private Sub button1_Click(sender As Object, e As EventArgs)
        Dim rowItemsToRemove As New List(Of UltraDataRow)()
            For Each item As UltraDataRow In ultraDataSource1.Rows
            Dim value As Object = Me.ultraDataSource1.Rows(item.Index).GetCellValue(2)
            Dim intValue As Integer

            If TypeOf value Is System.DBNull OrElse (Int32.TryParse(TryCast(value, String), intValue) AndAlso intValue = 0) Then
                rowItemsToRemove.Add(item)
            End If
        Next

        For Each rowItem As UltraDataRow In rowItemsToRemove
            ultraDataSource1.Rows.Remove(rowItem, True)
        Next
    End Sub


    I hope this helps.

    Best regards,
    Dimi
    Developer Support Engineer
    Infragistics Inc

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