DropDownTree TagHelper Overview
The Telerik UI DropDownTree TagHelper for ASP.NET Core is a server-side wrapper for the Kendo UI DropDownTree widget.
The DropDownTree represents an editor of hierarchical data, rendered in a tree-like structure, which provides multiple selection option and custom nodes.
Initializing the DropDownTree
The following example demonstrates how to define the DropDownTree by using the DropDownTree TagHelper.
<kendo-dropdowntree name="dropdowntree1">
</kendo-dropdowntree>
Basic Configuration
The DropDownTree TagHelper configuration options are passed as attributes of the tag. You can configure the items by binding the widget to <hierarchical-datasource>.
<kendo-dropdowntree name="dropdowntree1" datatextfield="FullName">
<hierarchical-datasource>
<transport>
<read url="https://demos.telerik.com/kendo-ui/service/Employees" datatype="jsonp" />
</transport>
<schema type="json">
<hierarchical-model id="EmployeeId" has-children="HasEmployees">
</hierarchical-model>
</schema>
</hierarchical-datasource>
</kendo-dropdowntree>
@(Html.Kendo().DropDownTree()
.Name("dropdowntree")
.Items(dropdowntree =>
{
dropdowntree.Add().Text("My Web Site")
.SpriteCssClasses("folder")
.Expanded(true)
.Items(root =>
{
root.Add().Text("images")
.Expanded(true)
.SpriteCssClasses("folder")
.Items(images =>
{
images.Add().Text("logo.png")
.SpriteCssClasses("image");
});
root.Add().Text("resources")
.Expanded(true)
.SpriteCssClasses("folder")
.Items(resources =>
{
resources.Add().Text("pdf")
.Expanded(true)
.SpriteCssClasses("folder")
.Items(pdf =>
{
pdf.Add().Text("prices.pdf")
.SpriteCssClasses("pdf");
});
resources.Add().Text("zip")
.SpriteCssClasses("folder");
});
root.Add().Text("about.html")
.SpriteCssClasses("html");
root.Add().Text("index.html")
.SpriteCssClasses("html");
});
})
)