触发ValueChanged后如何更新MudDataGrid的关联列？

我定义了如下MudDataGrid：

<MudDataGrid @ref="_dataGrid" Virtualize="true" Dense EditMode="DataGridEditMode.Cell" ReadOnly="false" T="InmodeloReposicion" Items="@modeloRepoDisp" SortMode="SortMode.Multiple" Filterable="true" Hideable="true" HorizontalScrollbar="false" FilterMode="@DataGridFilterMode.ColumnFilterRow" FilterCaseSensitivity="DataGridFilterCaseSensitivity.CaseInsensitive" @bind-SelectedItem="selectedItem">

...

<PropertyColumn Property="x => x.VentaMes12" Title="Venta Mes 12" IsEditable="false" CellStyle="max-width: 100px;" CellStyleFunc="_cellStyleFunc12" />


<TemplateColumn Title="Venta Atípica">
<EditTemplate Context="product">
<MudTextField T="int?" Value="@product.Item.ValoresAtipicos" Immediate="true" ValueChanged="@(newValue => ValChanged(newValue, product.Item) )" />
</EditTemplate>
<CellTemplate Context="product">@product.Item.ValoresAtipicos</CellTemplate></TemplateColumn>

...

</MudDataGrid>

对应的ValueChanged方法如下：

private void ValChanged(int? value, InmodeloReposicion a){
    try
    {
        a.ValoresAtipicos = value;
        a.Mes12 = value;
        decimal? valores = a.ConsumoPromPorDia - a.ValoresAtipicos;
        a.ConsumoPromPorDia = Math.Max(a.ConsumoPromPorDia - a.ValoresAtipicos ?? 0, 0);
    }
    catch (Exception)
    {
        throw;
    }

    StateHasChanged();
}

Items是通过按钮点击填充的内存列表。修改“Venta Atípica”列的值后，希望更新其他关联列（如“Venta Mes 12”），但操作后无效果，调用StateHasChanged()也未解决问题，该如何处理？

• 让实体实现INotifyPropertyChanged接口
  MudDataGrid需要依赖属性变更通知来自动更新UI。如果InmodeloReposicion类没实现这个接口，哪怕修改了属性值，UI也无法感知到变化。修改实体类示例：

  using System.ComponentModel;
  using System.Runtime.CompilerServices;
  
  public class InmodeloReposicion : INotifyPropertyChanged
  {
      private int? _valoresAtipicos;
      private int? _mes12;
      private decimal? _consumoPromPorDia;
  
      public int? ValoresAtipicos
      {
          get => _valoresAtipicos;
          set
          {
              if (_valoresAtipicos != value)
              {
                  _valoresAtipicos = value;
                  OnPropertyChanged();
              }
          }
      }
  
      public int? Mes12
      {
          get => _mes12;
          set
          {
              if (_mes12 != value)
              {
                  _mes12 = value;
                  OnPropertyChanged();
              }
          }
      }
  
      public decimal? ConsumoPromPorDia
      {
          get => _consumoPromPorDia;
          set
          {
              if (_consumoPromPorDia != value)
              {
                  _consumoPromPorDia = value;
                  OnPropertyChanged();
              }
          }
      }
  
      public event PropertyChangedEventHandler PropertyChanged;
  
      protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
      {
          PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
      }
  }
  

• 强制刷新DataGrid的目标行
  如果不想修改实体类，可在ValChanged方法里调用DataGrid的RefreshItem方法，明确通知UI更新指定行：

  private void ValChanged(int? value, InmodeloReposicion a){
      try
      {
          a.ValoresAtipicos = value;
          a.Mes12 = value;
          decimal? valores = a.ConsumoPromPorDia - a.ValoresAtipicos;
          a.ConsumoPromPorDia = Math.Max(a.ConsumoPromPorDia - a.ValoresAtipicos ?? 0, 0);
      }
      catch (Exception)
      {
          throw;
      }
  
      // 刷新当前修改的行
      _dataGrid.RefreshItem(a);
      // 若仍无效，尝试刷新整个DataGrid
      // _dataGrid.Refresh();
  }
  

  注意要保证_dataGrid的@ref已正确绑定，且调用时不为null。

• 排查虚拟滚动的影响
  因为开启了Virtualize="true"，虚拟滚动可能会缓存行数据。可以临时关闭Virtualize验证是否是这个原因导致的UI不更新，若关闭后正常，可在修改后调用_dataGrid.VirtualizeProvider.Refresh()来刷新虚拟列表。

内容的提问来源于stack exchange，提问作者George Arce