NavBarItemEventArgs.Item Property

Gets an item object related to the event.

Namespace: DevExpress.Web

Assembly: DevExpress.Web.v19.2.dll

Declaration

C#

public NavBarItem Item { get; }

VB.NET

Public ReadOnly Property Item As NavBarItem

Property Value

Type	Description
NavBarItem	A NavBarItem object, manipulations on which forced the event to be raised.

Remarks

The Item property represents a NavBarItem object concerned with raising the event.

Example

In the code sample below, the ASPxNavBar control is bound to an XML file using a standard XmlDataSource component. The item/group NavigateUrlField and TextField properties are used to specify the names of data item attributes from which the corresponding item/group settings should be obtained. The ItemDataBound and GroupDataBound events are handled to add corresponding images to items and groups respectively.

The image below shows the result.

C#

protected void ASPxNavBar1_ItemDataBound(object source, DevExpress.Web.NavBarItemEventArgs e) {
     System.Xml.XmlNode dataItem = ((e.Item.DataItem as IHierarchyData).Item as System.Xml.XmlNode);
     switch (dataItem.Name) {
          case "ctor":
               e.Item.Image.Url = "Images/ctor.gif";
               break;
          case "property":
               e.Item.Image.Url = "Images/property.gif";
               break;
          case "method":
               e.Item.Image.Url = "Images/method.gif";
               break;
          case "event":
               e.Item.Image.Url = "Images/event.gif";
               break;
     }
}

protected void ASPxNavBar1_GroupDataBound(object source, DevExpress.Web.NavBarGroupEventArgs e) {
     e.Group.HeaderImage.Url = "Images/class.gif";
}

VB.NET

Protected Sub ASPxNavBar1_ItemDataBound(ByVal source As Object, ByVal e As DevExpress.Web.NavBarItemEventArgs)
     Dim dataItem As System.Xml.XmlNode = (TryCast((TryCast(e.Item.DataItem, IHierarchyData)).Item, System.Xml.XmlNode))
     Select Case dataItem.Name
          Case "ctor"
               e.Item.Image.Url = "Images/ctor.gif"
          Case "property"
               e.Item.Image.Url = "Images/property.gif"
          Case "method"
               e.Item.Image.Url = "Images/method.gif"
          Case "event"
               e.Item.Image.Url = "Images/event.gif"
     End Select
End Sub

Protected Sub ASPxNavBar1_GroupDataBound(ByVal source As Object, ByVal e As DevExpress.Web.NavBarGroupEventArgs)
     e.Group.HeaderImage.Url = "Images/class.gif"
End Sub

ASPX

<dx:ASPxNavBar ID="ASPxNavBar1" runat="server" DataSourceID="XmlDataSource1" 
     onitemdatabound="ASPxNavBar1_ItemDataBound" 
     ongroupdatabound="ASPxNavBar1_GroupDataBound">
     <GroupDataFields NavigateUrlField="HelpUrl" TextField="Title" />
     <ItemDataFields NavigateUrlField="HelpUrl" TextField="Title" />
</dx:ASPxNavBar>

<asp:XmlDataSource ID="XmlDataSource1" runat="server" DataFile="~/App_Data/TreeView/HelpNav.xml" XPath="/namespace/*">
</asp:XmlDataSource>