Appearance
In this article, you will find information about the styling options and rendering of the Telerik UI for ASP.NET Core DropDownTree.
For a live example, visit the Appearance Demo of the DropDownTree.
Options
The DropDownTree supports the following styling options:
-
Size—configures the overall size of the component. -
Rounded—configures the border radius of the component. -
FillMode—configures how the color is applied to the component.
Size
The Size option controls the size of the DropDownTree. The k-input-{size} class, which is applied to the wrapping span element of the DropDownTree, reflects the value of the Size option. The k-input-{size} class is used when the DropDownTree is configured for Multiple Selection. When Single Selection is used in the DropDownTree, the class we apply is k-picker-{size}. The option also affects the span.k-chip element through the k-chip-{size} class.
The following values are available for the Size option:
-
Small—small size (applies thek-input-smclass to the wrapping span element) -
Medium—medium size (applies thek-input-mdclass to the wrapping span element) -
Large—large size (applies thek-input-lgclass to the wrapping span element) -
None—unset.
The following example demonstrates how to set Size in the declaration of the DropDownTree:
@(Html.Kendo().DropDownTree()
.Name("dropdowntree-single")
.HtmlAttributes(new { style = "width: 100%" })
.Height("auto")
.Placeholder("Select Product")
.DataValueField("id")
.Size(ComponentSize.Large)
.Items(items =>
{
items.Add().Text("Furniture").Id("1").Expanded(true)
.Items(children =>
{
children.Add().Text("Tables & Chairs").Id("2");
children.Add().Text("Sofas").Id("3");
children.Add().Text("Occasional Furniture").Id("4");
children.Add().Text("Childrens furniture").Id("5");
children.Add().Text("Beds").Id("6");
});
items.Add().Text("Decor").Id("7")
.Items(children =>
{
children.Add().Text("Bed Linen").Id("8");
children.Add().Text("Curtains & Blinds").Id("9");
children.Add().Text("Carpets").Id("10");
children.Add().Text("Rugs").Id("11");
children.Add().Text("Carpets").Id("12");
});
})
)
<kendo-dropdowntree datavaluefield="id" size="ComponentSize.Large" height="auto" placeholder="Select Product" name="dropdowntree-single" style="width: 100%">
<items>
<dropdowntree-item expanded="true" text="Furniture" id="1">
<items>
<dropdowntree-item expanded="false" text="Tables & Chairs" id="2">
</dropdowntree-item>
<dropdowntree-item expanded="false" text="Sofas" id="3">
</dropdowntree-item>
<dropdowntree-item expanded="false" text="Occasional Furniture" id="4">
</dropdowntree-item>
<dropdowntree-item expanded="false" text="Childerns Furniture" id="5">
</dropdowntree-item>
<dropdowntree-item expanded="false" text="Beds" id="6">
</dropdowntree-item>
</items>
</dropdowntree-item>
<dropdowntree-item expanded="false" text="Decor" id="7">
<items>
<dropdowntree-item expanded="false" text="Bed Linen" id="8">
</dropdowntree-item>
<dropdowntree-item expanded="false" text="Throws" id="9">
</dropdowntree-item>
<dropdowntree-item expanded="false" text="Curtains & Blinds" id="10">
</dropdowntree-item>
<dropdowntree-item expanded="false" text="Rugs" id="11">
</dropdowntree-item>
<dropdowntree-item expanded="false" text="Carpets" id="12">
</dropdowntree-item>
</items>
</dropdowntree-item>
</items>
</kendo-dropdowntree>
The default size value is Medium and it is applied to the span wrapping element through the k-input-md class.
Below is the HTML of the DropDownTree that is affected from the Size option. The changes are applied to the span.k-dropdowntree wrapping element:
<span class="k-dropdowntree k-picker k-dropdowntree-clearable k-picker-solid k-picker-lg k-rounded-full">
</span>
The HTML when multiple selection is configured:
<span class="k-dropdowntree k-input k-input-solid k-dropdowntree-clearable k-input-lg k-rounded-full">
</span>
Rounded
The Rounded option controls the border radius of the DropDownTree. The class that corresponds to the Rounded option is k-rounded-{rounded}.
The following values are available for the Rounded option:
-
Small—small border radius (applies thek-rounded-smclass to the wrapping span element) -
Medium—medium border radius (applies thek-rounded-mdclass to the wrapping span element) -
Large—large border radius (applies thek-rounded-lgclass to the wrapping span element) -
Full—largest (ellipse-like) border radius (applies thek-rounded-fullclass to the wrapping span element) -
None—unset.
The default value is Full. It applies the k-rounded-full class to the span.k-dropdowntree wrapping element that contains the HTML of the component.
The following example demonstrates how to set Rounded in the declaration of the DropDownTree:
@(Html.Kendo().DropDownTree()
.Name("dropdowntree-single")
.HtmlAttributes(new { style = "width: 100%" })
.Height("auto")
.Placeholder("Select Product")
.DataValueField("id")
.Rounded(Rounded.Medium)
.Items(items =>
{
items.Add().Text("Furniture").Id("1").Expanded(true)
.Items(children =>
{
children.Add().Text("Tables & Chairs").Id("2");
children.Add().Text("Sofas").Id("3");
children.Add().Text("Occasional Furniture").Id("4");
children.Add().Text("Childrens furniture").Id("5");
children.Add().Text("Beds").Id("6");
});
items.Add().Text("Decor").Id("7")
.Items(children =>
{
children.Add().Text("Bed Linen").Id("8");
children.Add().Text("Curtains & Blinds").Id("9");
children.Add().Text("Carpets").Id("10");
children.Add().Text("Rugs").Id("11");
children.Add().Text("Carpets").Id("12");
});
})
)
<kendo-dropdowntree datavaluefield="id" height="auto" rounded="Rounded.Medium" placeholder="Select Product" name="dropdowntree-single" style="width: 100%">
<items>
<dropdowntree-item expanded="true" text="Furniture" id="1">
<items>
<dropdowntree-item text="Tables & Chairs" id="2">
</dropdowntree-item>
<dropdowntree-item text="Sofas" id="3">
</dropdowntree-item>
<dropdowntree-item text="Occasional Furniture" id="4">
</dropdowntree-item>
<dropdowntree-item text="Childerns Furniture" id="5">
</dropdowntree-item>
<dropdowntree-item text="Beds" id="6">
</dropdowntree-item>
</items>
</dropdowntree-item>
<dropdowntree-item text="Decor" id="7">
<items>
<dropdowntree-item text="Bed Linen" id="8">
</dropdowntree-item>
<dropdowntree-item text="Throws" id="9">
</dropdowntree-item>
<dropdowntree-item text="Curtains & Blinds" id="10">
</dropdowntree-item>
<dropdowntree-item text="Rugs" id="11">
</dropdowntree-item>
<dropdowntree-item text="Carpets" id="12">
</dropdowntree-item>
</items>
</dropdowntree-item>
</items>
</kendo-dropdowntree>
When single selection is used, the changes are applied to the span.k-dropdowntree wrapping element:
<span class="k-dropdowntree k-picker k-dropdowntree-clearable k-picker-solid k-picker-md k-rounded-md">
</span>
The HTML when multiple selection is enabled:
<span class="k-dropdowntree k-input k-input-md k-dropdowntree-clearable k-input-solid k-rounded-md k-state-border-down">
</span>
FillMode
The FillMode option controls how color is applied to the component. The structure of the class is k-picker-{fillMode}.
The following values are available for the FillMode option:
-
Solid—applies thek-input-solidclass to the wrapping span element -
Flat—applies thek-input-flatclass to the wrapping span element -
Outline—applies thek-input-outlineclass to the wrapping span element -
None—unset.
The default value is Solid and it is applied to the span.k-dropdowntree wrapping element through the k-picker-solid class.
The following example demonstrates how to set FillMode in the declaration of the DropDownTree:
@(Html.Kendo().DropDownTree()
.Name("dropdowntree-single")
.HtmlAttributes(new { style = "width: 100%" })
.Height("auto")
.Placeholder("Select Product")
.DataValueField("id")
.FillMode(FillMode.Outline)
.Items(items =>
{
items.Add().Text("Furniture").Id("1").Expanded(true)
.Items(children =>
{
children.Add().Text("Tables & Chairs").Id("2");
children.Add().Text("Sofas").Id("3");
children.Add().Text("Occasional Furniture").Id("4");
children.Add().Text("Childrens furniture").Id("5");
children.Add().Text("Beds").Id("6");
});
items.Add().Text("Decor").Id("7")
.Items(children =>
{
children.Add().Text("Bed Linen").Id("8");
children.Add().Text("Curtains & Blinds").Id("9");
children.Add().Text("Carpets").Id("10");
children.Add().Text("Rugs").Id("11");
children.Add().Text("Carpets").Id("12");
});
})
)
<kendo-dropdowntree datavaluefield="id" height="auto" fill-mode="FillMode.Outline" placeholder="Select Product" name="dropdowntree-single" style="width: 100%">
<items>
<dropdowntree-item expanded="true" text="Furniture" id="1">
<items>
<dropdowntree-item text="Tables & Chairs" id="2">
</dropdowntree-item>
<dropdowntree-item text="Sofas" id="3">
</dropdowntree-item>
<dropdowntree-item text="Occasional Furniture" id="4">
</dropdowntree-item>
<dropdowntree-item text="Childerns Furniture" id="5">
</dropdowntree-item>
<dropdowntree-item text="Beds" id="6">
</dropdowntree-item>
</items>
</dropdowntree-item>
<dropdowntree-item text="Decor" id="7">
<items>
<dropdowntree-item text="Bed Linen" id="8">
</dropdowntree-item>
<dropdowntree-item text="Throws" id="9">
</dropdowntree-item>
<dropdowntree-item text="Curtains & Blinds" id="10">
</dropdowntree-item>
<dropdowntree-item text="Rugs" id="11">
</dropdowntree-item>
<dropdowntree-item text="Carpets" id="12">
</dropdowntree-item>
</items>
</dropdowntree-item>
</items>
</kendo-dropdowntree>
The FillMode.Outline value is reflected through the respective classes applied to the span.k-dropdowntree wrapping element:
<span class="k-dropdowntree k-picker k-picker-outline k-picker-md k-rounded-full k-dropdowntree-clearable">
</span>
The HTML when multiple selection is enabled:
<span class="k-dropdowntree k-input k-input-outline k-input-md k-dropdowntree-clearable k-rounded-full k-state-border-down">
</span>
Rendering
Starting with version R1 2022, the component has a new rendering. For additional information on the decision behind these changes, visit the Components Rendering Overview article.
To review the latest rendering of the component, refer to the HTML specifications in the Kendo UI Themes Monorepo. The tests folder of the repository contains the rendering for all flavors of the components, providing a clear reference for how their elements are structured. The rendering information can help you customize a component's appearance and behavior by applying custom CSS or JavaScript to suit specific design or functional requirements.