ListBoxProperties.SelectionMode Property
Gets or sets a value that specifies item selection behavior.
Namespace: DevExpress.Web
Assembly: DevExpress.Web.v18.2.dll
Declaration
[DefaultValue(ListEditSelectionMode.Single)]
public ListEditSelectionMode SelectionMode { get; set; }Property Value
| Type | Default | Description |
|---|---|---|
| ListEditSelectionMode | **Single** | One of the ListEditSelectionMode enumeration values. |
Available values:
| Name | Description |
|---|---|
| Single | Only one list box item can be selected at once. |
| Multiple | Multiple items can be selected within the editor by clicking list items while pressing Ctrl (to add an individual item) or Shift (to select a range of items). |
| CheckColumn | Multiple items can be selected within the editor by clicking specific check boxes or list items (the Shift key can also be used in this mode to select a range of items). |
Remarks
The SelectionMode property specifies how many list box items can be selected at once.
The following table provides detailed information about available selection modes:
Selection Mode | Description |
|---|---|
Single (the ListEditSelectionMode.Single value) | Only one list box item can be selected at once. |
Multiple (the ListEditSelectionMode.Multiple value) | Multiple items can be selected within the editor by clicking list items while pressing Ctrl (to add an individual item) or Shift (to select a range of items). |
Checkbox (the ListEditSelectionMode.CheckColumn value) | Multiple items can be selected within the editor by clicking specific check boxes or list items (the Shift key can also be used in this mode to select a range of items). |
Note
Note that in multiple selection mode, all list items are always sent to the client, and loading items on demand via callbacks is not supported. So, setting the editor’s ListBoxProperties.EnableCallbackMode and ListBoxProperties.CallbackPageSize properties is not in effect.
For more information about multiple selection, read the Multi-Selection Mode topic.
Note
The SelectionMode property synchronizes its value with the editor’s ASPxListBox.SelectionMode property.
Example
This part of the Multiple Selection demo illustrates how to use multi-selection mode for the ASPxListBox editor.
...
protected void lbModels_Callback(object sender, DevExpress.Web.CallbackEventArgsBase e) {
FilterModels(lbFeatures.Items);
lbModels.DataBind();
}
protected void FilterModels(ListEditItemCollection items) {
...
}
...