TextBox Appearance

As of the R1 2022 release, the TextBox uses a brand new rendering.

In this article, you will find information about the new appearance of the Telerik UI for ASP.NET Core TextBox.

For additional information regarding the decision behind these changes, visit the Components Rendering article.

For a live example, refer to the Appearance Demo of the TextBox.

Options

The TextBox HtmlHelper provides the following styling options:

• Size()—configures the overall size of the component.
• FillMode()—defines how the color is applied to the component.
• Rounded()—specifies the border radius of the component.

Size

The Size() method controls the size of the rendered TextBox.

The example below demonstrates how to adjust the Size of the component:

@(Html.Kendo().TextBox()
    .Name("textbox")
    .Size(ComponentSize.Medium)
)

<kendo-textbox name="textbox"
               size="ComponentSize.Medium">
</kendo-textbox>

The following values are available for the Size option:

• Small
• Medium
• Large
• None

The default size value is Medium and it is applied to the wrapping span element through the k-input-md class.

<span class="k-textbox k-input k-input-md">
</span>

Rounded

The border radius of the TextBox can be customized through the Rounded() method.

@(Html.Kendo().TextBox()
    .Name("textbox")
    .Rounded(Rounded.Medium)
)

<kendo-textbox name="textbox"
               rounded="Rounded.Medium">
</kendo-textbox>

The following values are available for the Rounded option:

• Small
• Medium
• Large
• Full
• None

The default value is Medium and it is added as a class k-rounded-md to the wrapping span element.

<span class="k-textbox k-input k-rounded-md">
</span>

FillMode

The FillMode() method controls the way the color is applied to the TextBox component.

@(Html.Kendo().TextBox()
    .Name("textbox")
    .FillMode(FillMode.Solid)
)

<kendo-textbox name="textbox"
               fill-mode="FillMode.Solid">
</kendo-textbox>

The following values are available for the FillMode option:

• Solid
• Flat
• Outline
• None

The default FillMode value is Solid and it is applied to the wrapping span element through the k-input-solid class.

<span class="k-textbox k-input k-input-solid">
</span>

Old vs New Rendering

The old rendering of the TextBox consisted of a span wrapper element with a single class named k-textbox that held all the styling information related to the widget.

 <!-- OLD -->
<input class="k-textbox" />

The new rendering of the component consists of a wrapping span element that has a child input element.

The span element controls the overall appearance of the component and has the following class structure:

<!-- NEW -->
<span class="k-input k-textbox k-input-flat k-input-md k-rounded-md" >
</span>

The full rendering of the component has the following HTML structure:

<span class="k-input k-textbox">
    <input id="textbox" data-role="textbox" class="k-input-inner" placeholder="Name">
</span>

Visual Backwards Compatibility

The new styling and rendering supports only the default options when a LESS theme is used.

Previously, a reference to the textbox element was obtainable through the k-input class.

$(".k-input") // Returns a reference to the textbox element in the old rendering.

With the new rendering, the textbox element must be targeted using the k-input-inner class.

$(".k-input-inner") // Returns a reference to the textbox element in the new rendering.

The following example showcases how to apply a background color to the TextBox in both the new, and the old rendering:

    <style>
      /* Doesn't work AFTER R1 2022 */
      .k-input {
        background-color: #0071bc !important; /* Blue color in versions BEFORE R1 2022 */
      }
      /* Doesn't work BEFORE R1 2022 */
      .k-input-inner {
        background-color: #2e8540 !important; /* Green color in versions AFTER R1 2022 */
      }
    </style>

See Also

• Appearance of the TextBox HtmlHelper for ASP.NET Core (Demo)
• Server-Side API