DxGridColumn.WidthChanged Event

Fires when a column’s width changes.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v24.2.dll

NuGet Package: DevExpress.Blazor

Declaration

[Parameter]
public EventCallback<string> WidthChanged { get; set; }

Parameters

Type	Description
String	The new Width property value.

Remarks

You can specify the column’s Width property value in any absolute or relative units that your browser supports. The WidthChanged event fires when a column’s width changes.

In the following code snippet, the WidthChanged event fires after a user resizes the Date column:

Razor

@inject WeatherForecastService ForecastService

<DxGrid Data="@Data" ColumnResizeMode="GridColumnResizeMode.NextColumn">
    <Columns>
        <DxGridDataColumn FieldName="Date" DisplayFormat="D"
                          Width="150px" WidthChanged=@OnWidthChanged />
        <DxGridDataColumn FieldName="TemperatureC" />
        <DxGridDataColumn FieldName="TemperatureF" />
    </Columns>
</DxGrid>

The new width: @Message

@code {
    object Data { get; set; }
    string Message { get; set; }
    void OnWidthChanged(string NewValue) {
        Message = NewValue;
    }
    protected override void OnInitialized() {
        Data = ForecastService.GetForecast();
    }
}

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; }
    public bool Precipitation { 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)],
                    Precipitation = Convert.ToBoolean(rng.Next(0, 2)),
                    Forecast = ConditionsForForecast.First(c => c.Item1 <= temperatureC).Item2
                };
            }).ToList();
        }

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

Program.cs

// ...
builder.Services.AddSingleton<WeatherForecastService>();