Connected.Components/Components/Table/SortableColumn.razor.cs

using Microsoft.AspNetCore.Components;

namespace Connected.Components;

/// <summary>
/// Binds an object's property to a column by its property name 
/// </summary>
public partial class SortableColumn<T, ModelType> : ColumnBase
{
   T InternalValue
   {
      get => Value;
      set
      {
         if (!EqualityComparer<T>.Default.Equals(value, Value))
         {
            Value = value;
            ValueChanged.InvokeAsync(value);
         }
      }
   }

   /// <summary>
   /// Specifies the name of the object's property bound to the column
   /// </summary>
   [Parameter] public T Value { get; set; }
   [Parameter] public EventCallback<T> ValueChanged { get; set; }

   /// <summary>
   /// Specifies the name of the object's property bound to the footer
   /// </summary>
   [Parameter]
   public T FooterValue
   {
      get { return _footerValue; }
      set { _footerValue = value; _footerValueAvailable = true; }
   }
   private T _footerValue;
   private bool _footerValueAvailable = false;

   /// <summary>
   /// Used if no FooterValue is available
   /// </summary>
   [Parameter] public string FooterText { get; set; }

   /// <summary>
   /// Specifies which string format should be used.
   /// </summary>
   [Parameter] public string DataFormatString { get; set; }

   /// <summary>
   /// Specifies if the column should be readonly even if the DataTable is in editmode.
   /// </summary>
   [Parameter] public bool ReadOnly { get; set; }
   [Parameter] public string SortLabel { get; set; }

   [Parameter] public Func<ModelType, object> SortBy { get; set; } = default;

   private string GetFormattedString(T item)
   {
      if (DataFormatString != null)
      {
         return string.Format(DataFormatString, item);
      }
      else
      {
         return item?.ToString();
      }
   }
}