DxRangeSelectorChartValueAxis.ValueType Property

Specifies the data type of the value axis. Casts values from the assigned data source to the target type if required.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v25.1.dll

NuGet Package: DevExpress.Blazor

Declaration

[Parameter]
public ChartAxisDataType ValueType { get; set; }

Property Value

Type	Description
ChartAxisDataType	An enumeration value.

Available values:

Name	Description
Auto	Does not cast arguments/values and displays them on the axis of the applicable type (Continuous for integer and float data types and Discrete for other data types).
Numeric	Casts arguments/values to a numeric type and displays them on the Continuous axis. To parse strings successfully, the decimal separator should be ‘.’.
String	Casts arguments/values to the String type and displays them on the Discrete axis.
DateTime	Casts arguments/values to the DateTime type and displays them on the Continuous axis. To parse strings successfully, the value should match the ISO JavaScript Date pattern.

Remarks

The DxRangeSelectorChart component determines the type of axis values based on the value type specified in the corresponding data source field of a series. For instance, if a data source stores data points as numeric values, axis values are also numeric.

You may need to change the type of values specified in the data source, for instance, when the assigned data source stores dates or numbers as strings. Use the ValueType property to specify the desired type for axis values. Additionally, you can use the Type property to specify the axis type.

The following code snippet casts values specified as strings to the Numeric type:

Razor

<DxRangeSelector Width="700px"
                 Height="300px"
                 Data="@Data">
    <DxTitleSettings Text="Population by Country, 2023" />
    <DxRangeSelectorChart>
        <DxChartBarSeries ArgumentField="@((PopulationPoint s) => s.Country)"
                          ValueField="@((PopulationPoint s) => s.Value)" />
        <DxRangeSelectorChartValueAxis ValueType="ChartAxisDataType.Numeric" />
    </DxRangeSelectorChart>
    <DxRangeSelectorBackground Color="#ebf9fa" />
</DxRangeSelector>

@code {
    List<PopulationPoint> Data;
    protected override void OnInitialized() {
        Data = GetData();
    }
}

DataSource

public List<PopulationPoint> GetData() {
    var result = new List<PopulationPoint>(14);
    result.Add(new PopulationPoint("India", "1428627663"));
    result.Add(new PopulationPoint("China", "1425671352"));
    result.Add(new PopulationPoint("United States", "339996563"));
    result.Add(new PopulationPoint("Indonesia", "277534122"));
    result.Add(new PopulationPoint("Pakistan", "240485658"));
    result.Add(new PopulationPoint("Nigeria", "223804632"));
    return result;
}
public class PopulationPoint {
    public string Country { get; set; }
    public string Value { get; set; }
    public PopulationPoint(string country, string value) {
        Country = country;
        Value = value;
    }
}