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Using the GetItems(itemType) Method
In some scenarios you may need to access the treelist items outside of the item events. This is easy to do using the GetItems(itemType) method.
Using GetItems(itemType)
The method accepts one parameter from the TreeListItemType enumerator and returns an array of all items from the RadTreeList instance that match the item type. Below you can see all the values of the enumerator and what types they return
| TreeListItemType value | Returned object |
|---|---|
| AlternatingItem | A collection of all visible TreeListDataItem instances which ItemType value is AlternatingItem |
| DetailTemplateItem | A collection of all TreeListDetailTemplateItem objects |
| EditFormItem | A collection of all TreeListEditForm objects |
| EditItem | A collection of all TreeListDataItem objects that are currently edited |
| FooterItem | A collection of all TreeListFooterItem objects |
| HeaderItem | A collection of all TreeListHeaderItem objects |
| Item | A collection of all visible TreeListDataItem instances which ItemType value is Item |
| NoRecordsTemplateItem | A collection of all TreeListNoRecordsItem objects |
| PagerItem | A collection of all TreeListPagerItem objects |
| SelectedItem | A collection of all selected TreeListDataItem objects on the current page |
Following is a sample of how you can use the method to access different treelist items:
C#
protected void RadTreeList1_PreRender(object sender, EventArgs e)
{
//the detail item of the first data item in the RadTreeList control
TreeListDetailTemplateItem detailItems = RadTreeList1.GetItems(TreeListItemType.DetailTemplateItem)[0] as TreeListDetailTemplateItem;
//the header item
TreeListHeaderItem header = RadTreeList1.GetItems(TreeListItemType.HeaderItem)[0] as TreeListHeaderItem;
//the first alternating data item
TreeListDataItem altItem = RadTreeList1_NeedDataSource.GetItems(TreeListItemType.AlternatingItem)[0] as TreeListDataItem;
}