# Stacked Area Chart

Show a total and its composition over time with a Blazor stacked area chart.

Keywords: chart, stack, graph, area

> API reference: [RadzenChart API](https://blazor.radzen.com/docs/api/Radzen.Blazor.RadzenChart.md)

## Examples

## Radzen Blazor Stacked Area series

A stacked area chart layers several series on top of each other, so you can see both the overall total and how each part contributes to it over time.

```razor
<RadzenStack class="rz-p-0 rz-p-md-6 rz-p-lg-12">
    <RadzenCard Variant="Variant.Outlined">
        <RadzenStack Orientation="Orientation.Horizontal" AlignItems="AlignItems.Center" Wrap="FlexWrap.Wrap">
            <RadzenStack Orientation="Orientation.Horizontal" AlignItems="AlignItems.Center" Gap="0.5rem">
                <RadzenCheckBox @bind-Value="@smooth" Name="smooth"></RadzenCheckBox>
                <RadzenLabel Text="Smooth" Component="smooth" />
            </RadzenStack>
            <RadzenStack Orientation="Orientation.Horizontal" AlignItems="AlignItems.Center" Gap="0.5rem">
                <RadzenCheckBox @bind-Value="@showDataLabels" Name="dataLabels"></RadzenCheckBox>
                <RadzenLabel Text="Show Data Labels" Component="dataLabels" />
            </RadzenStack>
            <RadzenStack Orientation="Orientation.Horizontal" AlignItems="AlignItems.Center" Gap="0.5rem">
                <RadzenLabel Text="Fill" Component="fillMode" />
                <RadzenSelectBar @bind-Value="@fillMode" TValue="FillMode" Size="ButtonSize.Small" Name="fillMode">
                    <Items>
                        <RadzenSelectBarItem Value="FillMode.Gradient" Text="Gradient" />
                        <RadzenSelectBarItem Value="FillMode.Solid" Text="Solid" />
                        <RadzenSelectBarItem Value="FillMode.None" Text="None" />
                    </Items>
                </RadzenSelectBar>
            </RadzenStack>
        </RadzenStack>
    </RadzenCard>

    <RadzenChart Animate="true">
        <RadzenStackedAreaSeries Smooth="@smooth" FillMode="@fillMode" Data="@revenue2023" CategoryProperty="Date" Title="2023" ValueProperty="Revenue">
            <RadzenSeriesDataLabels Visible="@showDataLabels" Fill="#FB7185" />
        </RadzenStackedAreaSeries>
        <RadzenStackedAreaSeries Smooth="@smooth" FillMode="@fillMode" Data="@revenue2024" CategoryProperty="Date" Title="2024" LineType="LineType.Dashed" ValueProperty="Revenue">
            <RadzenSeriesDataLabels Visible="@showDataLabels" />
        </RadzenStackedAreaSeries>
        <RadzenCategoryAxis Padding="20" />
        <RadzenValueAxis Formatter="@FormatAsUSD" Min="0" Max="800000" Step="100000">
            <RadzenGridLines Visible="true" />
            <RadzenAxisTitle Text="Revenue in USD" />
        </RadzenValueAxis>
    </RadzenChart>
</RadzenStack>

@code {
    bool smooth = true;
    bool showDataLabels = false;
    FillMode fillMode = FillMode.Gradient;
    class DataItem
    {
        public string Date { get; set; }
        public double Revenue { get; set; }
    }

    string FormatAsUSD(object value)
    {
        return ((double)value).ToString("C0", CultureInfo.CreateSpecificCulture("en-US"));
    }

    DataItem[] revenue2023 = new DataItem[] {
        new DataItem
        {
            Date = "Jan",
            Revenue = 234000
        },
        new DataItem
        {
            Date = "Feb",
            Revenue = 269000
        },
        new DataItem
        {
            Date = "Mar",
            Revenue = 233000
        },
        new DataItem
        {
            Date = "Apr",
            Revenue = 244000
        },
        new DataItem
        {
            Date = "May",
            Revenue = 214000
        },
        new DataItem
        {
            Date = "Jun",
            Revenue = 253000
        },
        new DataItem
        {
            Date = "Jul",
            Revenue = 274000
        },
        new DataItem
        {
            Date = "Aug",
            Revenue = 284000
        },
        new DataItem
        {
            Date = "Sept",
            Revenue = 273000
        },
        new DataItem
        {
            Date = "Oct",
            Revenue = 282000
        },
        new DataItem
        {
            Date = "Nov",
            Revenue = 289000
        },
        new DataItem
        {
            Date = "Dec",
            Revenue = 294000
        }
    };

    DataItem[] revenue2024 = new DataItem[] {
        new DataItem
        {
            Date = "Jan",
            Revenue = 334000
        },
        new DataItem
        {
            Date = "Feb",
            Revenue = 369000
        },
        new DataItem
        {
            Date = "Mar",
            Revenue = 333000
        },
        new DataItem
        {
            Date = "Apr",
            Revenue = 344000
        },
        new DataItem
        {
            Date = "May",
            Revenue = 314000
        },
        new DataItem
        {
            Date = "Jun",
            Revenue = 353000
        },
        new DataItem
        {
            Date = "Jul",
            Revenue = 374000
        },
        new DataItem
        {
            Date = "Aug",
            Revenue = 384000
        },
        new DataItem
        {
            Date = "Sept",
            Revenue = 373000
        },
        new DataItem
        {
            Date = "Oct",
            Revenue = 382000
        },
        new DataItem
        {
            Date = "Nov",
            Revenue = 389000
        },
        new DataItem
        {
            Date = "Dec",
            Revenue = 394000
        }
    };
}
```