New to Telerik UI for Blazor? Download free 30-day trial

Blazor Barcode Overview

The Blazor Barcode component represents data in a machine-readable format. It supports several different encoding standards.

All graphics are rendered on the client by using Scalable Vector Graphics (SVG).

Creating Blazor Barcode

  1. Add the TelerikBarcode tag to add the component to your razor page.

  2. Set the Value property.

  3. Set the Height and Width properties.

  4. Optionally, choose a Type (one of the encodings we support).

    • Its default encoding is Code39.

A basic configuration of the Telerik Barcode

<TelerikBarcode Width="300px"


Encoding represents the mapping between messages and barcodes. Read more about the supported Blazor Barcode Encodings.


The Barcode methods are accessible through it's reference.

  • Refresh - redraws the component.

Get a reference to the Barcode and use its methods

@* This code snippet showcases an example usage of the Refresh() method. *@

<TelerikButton OnClick="@ChangeSize">Change Size!</TelerikButton>
<br />
<br />
<TelerikButton OnClick="@(() => TelerikBarcodeRef.Refresh())">Refresh component after changes!</TelerikButton>
<br />
<br />

<TelerikBarcode @ref="TelerikBarcodeRef" Width="@Width"

    Telerik.Blazor.Components.TelerikBarcode TelerikBarcodeRef { get; set; }

    string Height { get; set; } = "200px";
    string Width { get; set; } = "300px";

    public void ChangeSize()
        Height = "400px";
        Width = "500px";


The Blazor Barcode provides various parameters that allow you to configure the component:

Parameter Type Description
RenderAs RenderingMode enum
Defines the preferred rendering mode - svg/canvas.
Checksum bool By setting it to true, the Barcode will display the checksum digit next to the value in the text area.
Type BarcodeType enum
Defines the symbology (encoding) the Barcode will use - (full list of supported encodings)
Value string Defines the initial value of the Barcode.
Width string
Height string
Class string The CSS class that will be rendered on the main wrapping element of the Barcode component.
Background string
Color string Defines the color of the bar elements.

BarcodeText parameters

The nested BarcodeText tag exposes parameters that customize the appearance of the Blazor Barcode text:

Parameter Type Description
Color string
Font string
BarcodeTextMargin object
BarcodeTextMargin.Bottom double
BarcodeTextMargin.Left double
BarcodeTextMargin.Right double
BarcodeTextMargin.Top double
Visible bool
If false, the Barcode will not display the value as text below the barcode lines.

BarcodeBorder parameters

The nested BarcodeBorder tag exposes parameters that enable you to customize the appearance of the Blazor Barcode border:

Parameter Type Description
Color string
DashType DashType enum
Width double

BarcodePadding parameters

The nested BarcodePadding tag exposes parameters that enable you to customize the appearance of the Blazor Barcode:

Parameter Type Description
Bottom double
Left double
Right double
Top double

Next Steps

Explore the Barcode Encodings

See Also

In this article