Blazor ChunkProgressBar Overview

The Blazor ChunkProgressBar component tracks the execution of operations and displays what portion of it is completed in predefined number of sections (chunks). For very long tasks, you can also make it indeterminate while waiting for an update.

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The ChunkProgressBar 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.

Basic ChunkProgressBar

To use the Telerik ChunkProgressBar in your Blazor application:

  • add the <TelerikChunkProgressBar> tag.
  • set its Value and Max parameters to denote how much is completed.

chunkprogress-bar basic configuration example

@*Basic configuration of the ChunkProgressBar*@

<TelerikChunkProgressBar Value="@ChunkProgressBarValue" Max="@MaxValue" />

@code {
    public double MaxValue { get; set; } = 5;
    public double ChunkProgressBarValue { get; set; } = 3;

Component namespace and reference

<TelerikChunkProgressBar Value="@ChunkProgressBarValue" Max="@MaxValue" @ref="@MyChunkProgressBar" />

@code {
    Telerik.Blazor.Components.TelerikChunkProgressBar MyChunkProgressBar { get; set; }

    public double MaxValue { get; set; } = 10;
    public double ChunkProgressBarValue { get; set; } = 3;


The ChunkProgressBar provides the following features:

  • Class - the CSS class that will be rendered on the main wrapping element. You can use it to cascade styles more easily.
  • Max - double, defaults to 100 - the maximum value of the ChunkProgressBar. It must be greater than 0.
  • Value - double - the value of the ChunkProgressBar. This value indicates the progress of the tracked process and is distributed in the chunks (sections) of the ChunkProgressBar. It is a fraction of the Max. Read mode in the Chunk Count, Value and MaxValue section.
  • ChunkCount - unsigned int, defaults to 5 - the number of chunks the ChunkProgressBar will be separated into.
  • Orientation - you can control the orientation of the Progress Bar, through the ProgressBarOrientation enum, with members:
    • Horizontal - this is the default value
    • Vertical
  • Indeterminate - bool, defaults to false - see the Indeterminate article for more information.

Chunk Count, Value and MaxValue

The following examples explain how the three parameters of the component tie together to determine how many chunks are filled in.

Matching Values for the Max and ChunkCount Parameters

When the Max and ChunkCount parameters match in value, the Value parameter represents the number of chunks that are hightlighted.

<TelerikChunkProgressBar Value="2"

The result from the code snippet above

Blazor Chunkprogressbar Matching Values Example

Non-matching Value for the Max and ChunkCount Parameters

Each chunk (section) represents an equal part of the maximum value (Max/ChunkCount). So, when the Max and ChunkCount parameters do not match in value, the Value parameter highlights the number of chunks that is less than or equal (<=) to the full fractions that it represents.

In the example below each chunk is "worth" 10 / 4 = 2.5. The Value is 3 so the full chunks this covers is 3 / 2.5 = 1.2, so 1 chunk will be highlighted. If the Value is set to 4, one chunk will remain highlighted, a second chunk will be highlighted when the Value becomes 5.

<TelerikChunkProgressBar Value="3"

The result of the code snippet above

non-matching values example screenshot


Responsive ProgressBar

The progress bar will resize with the parent element dimensions when you set its width to 100%

<div style="width: 50%; border: 1px solid red;">

        .width-100 {
            width: 100%;

    <TelerikChunkProgressBar Class="width-100" Value="44" />

See Also

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