DxGrid.PageIndexChanged Event

Fires when the grid’s active page index changes.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v21.1.dll

NuGet Package: DevExpress.Blazor

Declaration

[Parameter]
public EventCallback<int> PageIndexChanged { get; set; }

Parameters

Type	Description
Int32	A new value of the PageIndex property.

Remarks

The PageIndexChanged event fires each time the PageIndex property value changes. The event is handled automatically when you use two-way data binding for the PageIndex property (@bind-PageIndex).

You can also handle this event to respond to page index changes.

Razor

@inject WeatherForecastService ForecastService

<DxGrid Data="@Data" PageSize="3"
        PageIndex="@GridPageIndex"
        PageIndexChanged="OnPageIndexChanged">
    <Columns>
        <DxGridDataColumn FieldName="Date" DisplayFormat="D" />
        <DxGridDataColumn FieldName="TemperatureC" Caption="@("Temp. (\x2103)")" Width="120px" />
        <DxGridDataColumn FieldName="TemperatureF" Caption="@("Temp. (\x2109)")" Width="120px" />
        <DxGridDataColumn FieldName="Forecast" />
        <DxGridDataColumn FieldName="CloudCover" />
    </Columns>
</DxGrid>

<div>@PageIndexInfo</div>

@code {
    object Data { get; set; }
    int GridPageIndex { get; set; }
    string PageIndexInfo { get; set; }

    protected override void OnInitialized() {
        Data = ForecastService.GetForecast();
    }

    void OnPageIndexChanged(int newPageIndex) {
        GridPageIndex = newPageIndex;
        PageIndexInfo = "You switched to page " + (newPageIndex + 1);
    }
}

WeatherForecast

using System;

public class WeatherForecast {
    public DateTime Date { get; set; }
    public int TemperatureC { get; set; }
    public double TemperatureF => Math.Round((TemperatureC * 1.8 + 32), 2);
    public string Forecast { get; set; }
    public string CloudCover { get; set; }
}

WeatherForecastService

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

public class WeatherForecastService {
    private List<WeatherForecast> Forecast { get; set; }

    private static string[] CloudCover = new[] {
        "Sunny", "Partly cloudy", "Cloudy", "Storm"
    };

    Tuple<int, string>[] ConditionsForForecast = new Tuple<int, string>[] {
        Tuple.Create( 22 , "Hot"),
        Tuple.Create( 13 , "Warm"),
        Tuple.Create( 0 , "Cold"),
        Tuple.Create( -10 , "Freezing")
    };

    public WeatherForecastService() {
        Forecast = CreateForecast();
    }

    private List<WeatherForecast> CreateForecast() {
        var rng = new Random();
        DateTime startDate = DateTime.Now;
        return Enumerable.Range(1, 15).Select(index => {
            var temperatureC = rng.Next(-10, 30);
            return new WeatherForecast {
                Date = startDate.AddDays(index),               
                TemperatureC = temperatureC,
                CloudCover = CloudCover[rng.Next(0, 4)],
                Forecast = ConditionsForForecast.First(c => c.Item1 <= temperatureC).Item2
            };
        }).ToList();
    }

    public IEnumerable<WeatherForecast> GetForecast() {
        return Forecast.ToArray();
    }
}

Startup

public class Startup {
// ...
    public void ConfigureServices(IServiceCollection services) {
    // ...
        services.AddSingleton<WeatherForecastService>();
        // ...
    }
    // ...
}