ASPxClientCardView.BatchEditConfirmShowing Event

Enables you to prevent a batch edit confirmation message from being displayed.

Declaration

BatchEditConfirmShowing: ASPxClientEvent<ASPxClientCardViewBatchEditConfirmShowingEventHandler<ASPxClientCardView>>

Event Data

The BatchEditConfirmShowing event's data class is ASPxClientCardViewBatchEditConfirmShowingEventArgs. The following properties provide information specific to this event:

Property	Description
cancel	Specifies whether to cancel the related action (for example, row edit, export). Inherited from ASPxClientCancelEventArgs.
requestTriggerID	Gets the client identifier of an object that initiates a send request.

Remarks

In batch edit mode, if the GridBatchEditSettings.ShowConfirmOnLosingChanges property is true (the default behavior), a confirmation dialog is displayed when a grid page contains modified values and an end-user tries to send a request, for instance to sort grid data. The BatchEditConfirmShowing event occurs before displaying this confirmation dialog and allows you to cancel its display, if required.

For instance, you may want to prevent the batch edit confirmation dialog from being displayed, if you place the ASPxCardView into an ASPxCallbackPanel together with other controls (such as ASPxTabControl, ASPxButton, etc.), and some of these controls (but not the ASPxCardView) initiate the panel update by calling the ASPxCallbackPanel’s client ASPxClientCallbackPanel.PerformCallback method. In this case, you can set a client flag in the initiator control’s client event handler, and then analyze this flag within a handler of the BatchEditConfirmShowing event. The event argument’s ASPxClientCardViewBatchEditConfirmShowingEventArgs.requestTriggerID property will give you the ID of the ASPxCallbackPanel whose client PerformCallback method has been called. In the event handler, you can set the ASPxClientCancelEventArgs.cancel property to true to prevent display of the grid confirmation dialog.

JS

function Grid_BatchEditConfirmShowing(s, e) {
    if(e.requestTriggerID === "MyCallbackPanel" && myFlag)
        e.cancel = true;
}

Example

The following example creates an unbound column that calculates the sum of other columns and changes its values dynamically when an end-user changes a grid value in Batch edit mode.

function OnBatchEditEndEditing(s, e) {
    window.setTimeout(function () {
        var price = s.batchEditApi.GetCellValue(e.visibleIndex, "Price");
        var quantity = s.batchEditApi.GetCellValue(e.visibleIndex, "Quantity");
        s.batchEditApi.SetCellValue(e.visibleIndex, "Sum", price * quantity);
    }, 10);
}

Default.aspx

<dx:ASPxCardView ID="Grid" runat="server" KeyFieldName="ID" AutoGenerateColumns="False"
                 OnBatchUpdate="ASPxCardView1_BatchUpdate" OnCardDeleting="ASPxCardView1_CardDeleting" 
                 OnCardInserting="ASPxCardView1_CardInserting" OnCardUpdating="ASPxCardView1_CardUpdating" 
                 OnCustomUnboundColumnData="ASPxCardView1_CustomUnboundColumnData" >
    <ClientSideEvents BatchEditEndEditing="OnBatchEditEndEditing" />
    <SettingsEditing Mode="Batch" />
    <Columns>
        <dx:CardViewSpinEditColumn FieldName="Quantity" >
            <PropertiesSpinEdit DisplayFormatString="g" />
        </dx:CardViewSpinEditColumn>
        <dx:CardViewSpinEditColumn FieldName="Price" >
            <PropertiesSpinEdit DisplayFormatString="g" />
        </dx:CardViewSpinEditColumn>
        <dx:CardViewTextColumn FieldName="Sum" ReadOnly="True" UnboundType="Decimal" />
    </Columns>
    <CardLayoutProperties>
        <Items>
            <dx:CardViewCommandLayoutItem HorizontalAlign="Right" ShowDeleteButton="True" 
                                          ShowEditButton="True" ShowNewButton="True">
            </dx:CardViewCommandLayoutItem>
            <dx:CardViewColumnLayoutItem ColumnName="Quantity" />
            <dx:CardViewColumnLayoutItem ColumnName="Price" />
            <dx:CardViewColumnLayoutItem ColumnName="Sum" />
            <dx:EditModeCommandLayoutItem HorizontalAlign="Right" />
        </Items>
    </CardLayoutProperties>
</dx:ASPxCardView>

Default.aspx.cs

protected List<GridDataItem> GridData {
    get
    {
        var key = "34FAA431-CF79-4869-9488-93F6AAE81263";
        if (!IsPostBack || Session[key] == null)
            Session[key] = Enumerable.Range(1, 100).Select(i => new GridDataItem
            {
                ID = i,
                Quantity = i * 10 % 7 % i,
                Price = i * 0.5 % 3
            }).ToList();
        return (List<GridDataItem>)Session[key];
    }
}
protected void Page_Load(object sender, EventArgs e) {
    Grid.DataSource = GridData;
    Grid.DataBind();
}
protected void ASPxCardView1_BatchUpdate(object sender, DevExpress.Web.Data.ASPxDataBatchUpdateEventArgs e) {
    foreach (var args in e.InsertValues)
        InsertNewItem(args.NewValues);
    foreach (var args in e.UpdateValues)
        UpdateItem(args.Keys, args.NewValues);
    foreach (var args in e.DeleteValues)
        DeleteItem(args.Keys, args.Values);

    e.Handled = true;
}
protected void ASPxCardView1_CardInserting(object sender, DevExpress.Web.Data.ASPxDataInsertingEventArgs e) {
    InsertNewItem(e.NewValues);
    CancelEditing(e);
}
protected void ASPxCardView1_CardUpdating(object sender, DevExpress.Web.Data.ASPxDataUpdatingEventArgs e) {
    UpdateItem(e.Keys, e.NewValues);
    CancelEditing(e);
}
protected void ASPxCardView1_CardDeleting(object sender, DevExpress.Web.Data.ASPxDataDeletingEventArgs e) {
    DeleteItem(e.Keys, e.Values);
    CancelEditing(e);
}
protected void ASPxCardView1_CustomUnboundColumnData(object sender, DevExpress.Web.ASPxCardViewColumnDataEventArgs e) {
    if (e.Column.FieldName == "Sum")
    {
        decimal price = Convert.ToDecimal(e.GetListSourceFieldValue("Price"));
        int quantity = Convert.ToInt32(e.GetListSourceFieldValue("Quantity"));

        e.Value = price * quantity;
    }
}
protected GridDataItem InsertNewItem(OrderedDictionary newValues) {
    var item = new GridDataItem() { ID = GridData.Count };
    LoadNewValues(item, newValues);
    GridData.Add(item);
    return item;
}
protected GridDataItem UpdateItem(OrderedDictionary keys, OrderedDictionary newValues) {
    var id = Convert.ToInt32(keys["ID"]);
    var item = GridData.First(i => i.ID == id);
    LoadNewValues(item, newValues);
    return item;
}
protected GridDataItem DeleteItem(OrderedDictionary keys, OrderedDictionary values) {
    var id = Convert.ToInt32(keys["ID"]);
    var item = GridData.First(i => i.ID == id);
    GridData.Remove(item);
    return item;
}
protected void LoadNewValues(GridDataItem item, OrderedDictionary values) {
    item.Quantity = Convert.ToInt32(values["Quantity"]);
    item.Price = Convert.ToDouble(values["Price"]);
}
protected void CancelEditing(CancelEventArgs e) {
    e.Cancel = true;
    Grid.CancelEdit();
}
public class GridDataItem {
    public int ID { get; set; }
    public int Quantity { get; set; }
    public double Price { get; set; }
}

Default.aspx.vb

Protected ReadOnly Property GridData() As List(Of GridDataItem)
    Get
        Dim key = "34FAA431-CF79-4869-9488-93F6AAE81263"
        If (Not IsPostBack) OrElse Session(key) Is Nothing Then
            Session(key) = Enumerable.Range(1, 100).Select(Function(i) New GridDataItem With {.ID = i, .Quantity = i * 10 Mod 7 Mod i, .Price = i * 0.5 Mod 3}).ToList()
        End If
        Return DirectCast(Session(key), List(Of GridDataItem))
    End Get
End Property
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
    Grid.DataSource = GridData
    Grid.DataBind()
End Sub
Protected Sub ASPxCardView1_BatchUpdate(ByVal sender As Object, ByVal e As DevExpress.Web.Data.ASPxDataBatchUpdateEventArgs)
    For Each args In e.InsertValues
        InsertNewItem(args.NewValues)
    Next args
    For Each args In e.UpdateValues
        UpdateItem(args.Keys, args.NewValues)
    Next args
    For Each args In e.DeleteValues
        DeleteItem(args.Keys, args.Values)
    Next args

    e.Handled = True
End Sub
Protected Sub ASPxCardView1_CardInserting(ByVal sender As Object, ByVal e As DevExpress.Web.Data.ASPxDataInsertingEventArgs)
    InsertNewItem(e.NewValues)
    CancelEditing(e)
End Sub
Protected Sub ASPxCardView1_CardUpdating(ByVal sender As Object, ByVal e As DevExpress.Web.Data.ASPxDataUpdatingEventArgs)
    UpdateItem(e.Keys, e.NewValues)
    CancelEditing(e)
End Sub
Protected Sub ASPxCardView1_CardDeleting(ByVal sender As Object, ByVal e As DevExpress.Web.Data.ASPxDataDeletingEventArgs)
    DeleteItem(e.Keys, e.Values)
    CancelEditing(e)
End Sub
Protected Sub ASPxCardView1_CustomUnboundColumnData(ByVal sender As Object, ByVal e As DevExpress.Web.ASPxCardViewColumnDataEventArgs)
    If e.Column.FieldName = "Sum" Then
        Dim price As Decimal = Convert.ToDecimal(e.GetListSourceFieldValue("Price"))
        Dim quantity As Integer = Convert.ToInt32(e.GetListSourceFieldValue("Quantity"))

        e.Value = price * quantity
    End If
End Sub
Protected Function InsertNewItem(ByVal newValues As OrderedDictionary) As GridDataItem
    Dim item = New GridDataItem() With {.ID = GridData.Count}
    LoadNewValues(item, newValues)
    GridData.Add(item)
    Return item
End Function
Protected Function UpdateItem(ByVal keys As OrderedDictionary, ByVal newValues As OrderedDictionary) As GridDataItem

    Dim id_Renamed = Convert.ToInt32(keys("ID"))
    Dim item = GridData.First(Function(i) i.ID = id_Renamed)
    LoadNewValues(item, newValues)
    Return item
End Function
Protected Function DeleteItem(ByVal keys As OrderedDictionary, ByVal values As OrderedDictionary) As GridDataItem

    Dim id_Renamed = Convert.ToInt32(keys("ID"))
    Dim item = GridData.First(Function(i) i.ID = id_Renamed)
    GridData.Remove(item)
    Return item
End Function
Protected Sub LoadNewValues(ByVal item As GridDataItem, ByVal values As OrderedDictionary)
    item.Quantity = Convert.ToInt32(values("Quantity"))
    item.Price = Convert.ToDouble(values("Price"))
End Sub
Protected Sub CancelEditing(ByVal e As CancelEventArgs)
    e.Cancel = True
    Grid.CancelEdit()
End Sub
Public Class GridDataItem
    Public Property ID() As Integer
    Public Property Quantity() As Integer
    Public Property Price() As Double
End Class