ASPxListBox.EnableCallbackMode Property
Gets or sets a value that specifies whether the editor’s list items can be loaded to the client side on demand via callbacks.
Namespace: DevExpress.Web
Assembly: DevExpress.Web.v18.2.dll
Declaration
Property Value
Type | Default | Description |
---|---|---|
Boolean | **false** | true, if on demand item loading is available; otherwise, false. |
Remarks
This property is a wrapper of the ListBoxProperties.EnableCallbackMode property.
Note
Callback Mode Limitations * If the control ViewState is enabled, it gets all items on a load, regardless of the EnableCallbackMode property value (excluding the multicolumn mode). Therefore, it is recommended for you to disable the view state when you use callback mode.
Loading items on demand is supported in single selection mode only (the ASPxListBox.SelectionMode property is set to Single). In other selection modes, all list items are always sent to the client. So, setting the editor’s
ASPxListBox.EnableCallbackMode
and ASPxListBox.CallbackPageSize properties is not in effect.If you need to implement the selection feature and your data source is large, use ASPxGridView in server mode rather than ASPxListBox. Review the Binding to Large Data (Database Server Mode) topic for more details.