TrackBarItem.Value Property
Gets or sets the item’s associated value.
Namespace: DevExpress.Web
Assembly: DevExpress.Web.v24.2.dll
NuGet Package: DevExpress.Web
#Declaration
#Property Value
Type | Default | Description |
---|---|---|
Object | null | An Object that specifies the item’s value. |
#Remarks
The Value property specifies a value associated with an item. To access the item value on the client side, use the ASPxClientTrackBar.GetItemValue method.
If the item’s TrackBarItem.ToolTip property is not specified, the Value property value is displayed within the value tooltip.
Note
For a track bar editor to function properly, values of all items in its ASPx
#Example
The code sample below demonstrates how you can use the ASPxTrackBar control in two ways. On the one hand, a user can easily choose the required value or item, on the other hand, you can show end-users the visual result of their actions.
In this example, an end-user can select a chemical element and see its melting point. Here we use two track bars. The first track bar is used to visualize melting points and looks like a thermometer scale. By design, an end-user cannot change its value directly, so the ASPxEdit.ReadOnly property for this track bar is enabled. The second track bar is used to select the required chemical element. All the defined elements are gathered to the ASPxTrackBar.Items collection. The ASPxClientTrackBar.PositionChanged event of the second track bar is handled to update the value of the first track bar.
The image below shows the result.
function OnPositionChanged(s, e) {
updateItems(s);
}
function OnInit(s, e) {
updateItems(s);
}
function updateItems(trackBar) {
var trackBarValue = trackBar.GetValue();
termometer.SetValue(trackBarValue);
}