Index.razor

@page "/"

@using GridDisabledCheckboxes.Data
@inject WeatherForecastService ForecastService

<DxGrid Data="@forecasts"
        CssClass="mw-1100"
        @bind-SelectedDataItems="@SelectedDataItems">
    <Columns>
        <DxGridSelectionColumn Width="70px" AllowSelectAll="false">
            <CellDisplayTemplate>
                @{
                    var item = (WeatherForecast)context.DataItem;
                }
                <DxCheckBox @bind-Checked="context.Selected" Enabled=@(item.Summary != "Mild") />
            </CellDisplayTemplate>
        </DxGridSelectionColumn>
        <DxGridDataColumn Caption="Date" FieldName="Date" />
        <DxGridDataColumn Caption="Temperature" FieldName="TemperatureF" />
        <DxGridDataColumn Caption="Summary" FieldName="Summary" />
    </Columns>
</DxGrid>

@code {
    private WeatherForecast[]? forecasts;
    IReadOnlyList<object> SelectedDataItems;

    protected override async Task OnInitializedAsync() {
        forecasts = await ForecastService.GetForecastAsync(DateTime.Now);
        SelectedDataItems = forecasts.Where(f => f.Summary == "Warm").ToList();
    }
}