Blazor TextArea Overview

The Telerik Blazor TextArea component is a highly customizable multi-line text input area. It provides features like auto resizing based on the user input and events to respond to user actions.

The TextArea component is part of Telerik UI for Blazor, a professional grade UI library with 95+ native components for building modern and feature-rich applications. To try it out sign up for a free 30-day trial.

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Creating Blazor TextArea

1. Add the <TelerikTextArea> tag to a Razor file.
2. Set the Value parameter to a string object. It supports one-way and two-way binding.
3. (optional) Set the AutoSize property to adjust the TextArea height based on the user input.

Basic TextArea with two-way value binding

<TelerikTextArea @bind-Value="@TextAreaValue" 
                 AutoSize="true" />

<p>TextArea value: @TextAreaValue</p>

@code {
    public string TextAreaValue { get; set; }
}

Appearance

The TextArea component provides settings to control its appearance. Read more about the Blazor TextArea appearance settings.

Events

The Blazor TextArea fires blur and value change events to respond to user actions. Read more about the Blazor TextArea events.

TextArea Parameters

The Blazor TextArea provides various parameters to configure the component:

Parameter	Type and Default Value	Description
Value	string	Get/set the value of the input, can be used for binding.
AutoComplete	bool	Maps to the autocomplete attribute of the HTML <textarea>.
Class	string	The custom CSS class to be rendered on the <span class="k-textarea"> element.
AutoSize	bool	Specifies if the TextArea will adjust its height based on the user input.
DebounceDelay	int	Specifies the time in milliseconds between the last typed symbol and the updating of the value. The default value is 150ms.
Enabled	bool true	Whether the TextArea is enabled.
Id	string	Renders as the id attribute on the <textarea> element, so you can attach a <label for="">.
Label	string	The label element rendered next to the <textarea> to provide the user with information on its purpose. It covers the input in a fashion similar to a placeholder, and floating animation upwards on focus. If you don't want this effect or the height increase it causes, use the Id parameter to attach your own <label> tag.
Name	string	The name attribute of the HTML element. It is usually required so the AutoComplete will be honored by the browser.
PlaceHolder	string	A string that maps to the placeholder attribute of the HTML element. If a Label is defined, it will be shown instead of the placeholder when the input is not focused.
TabIndex	Nullable<int>	Maps to the tabindex attribute of the HTML element. You can use it to customize the order in which the inputs in your form focus with the Tab key.
Title	string	Maps to the title attribute of the HTML element. You can use it to add a tooltip.
ValidateOn	ValidationEvent enum (Input)	Configures the event that will trigger validation (if validation is enabled). Read more at Validation Modes for Simple Inputs.
Width	string	The component width. See Dimensions. The Width parameter has no default value, but the theme applies a width: 100% style.

See the Input Validation article.

Next Steps

• Handle the TextArea Events
• Explore the TextArea Appearance Settings

See Also

• Live TextArea Demos
• TextArea API Reference