TypedTableBaseExtensions.cs

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using System.Collections.Generic;
 
namespace System.Data;
 
public static class TypedTableBaseExtensions
{
    public static EnumerableRowCollection<TRow> Where<TRow>(this TypedTableBase<TRow> source, Func<TRow, bool> predicate) where TRow : DataRow
    {
        DataSetUtil.CheckArgumentNull(source, "source");
        EnumerableRowCollection<TRow> source2 = new EnumerableRowCollection<TRow>(source);
        return source2.Where(predicate);
    }
 
    public static OrderedEnumerableRowCollection<TRow> OrderBy<TRow, TKey>(this TypedTableBase<TRow> source, Func<TRow, TKey> keySelector) where TRow : DataRow
    {
        DataSetUtil.CheckArgumentNull(source, "source");
        EnumerableRowCollection<TRow> source2 = new EnumerableRowCollection<TRow>(source);
        return source2.OrderBy(keySelector);
    }
 
    public static OrderedEnumerableRowCollection<TRow> OrderBy<TRow, TKey>(this TypedTableBase<TRow> source, Func<TRow, TKey> keySelector, IComparer<TKey> comparer) where TRow : DataRow
    {
        DataSetUtil.CheckArgumentNull(source, "source");
        EnumerableRowCollection<TRow> source2 = new EnumerableRowCollection<TRow>(source);
        return source2.OrderBy(keySelector, comparer);
    }
 
    public static OrderedEnumerableRowCollection<TRow> OrderByDescending<TRow, TKey>(this TypedTableBase<TRow> source, Func<TRow, TKey> keySelector) where TRow : DataRow
    {
        DataSetUtil.CheckArgumentNull(source, "source");
        EnumerableRowCollection<TRow> source2 = new EnumerableRowCollection<TRow>(source);
        return source2.OrderByDescending(keySelector);
    }
 
    public static OrderedEnumerableRowCollection<TRow> OrderByDescending<TRow, TKey>(this TypedTableBase<TRow> source, Func<TRow, TKey> keySelector, IComparer<TKey> comparer) where TRow : DataRow
    {
        DataSetUtil.CheckArgumentNull(source, "source");
        EnumerableRowCollection<TRow> source2 = new EnumerableRowCollection<TRow>(source);
        return source2.OrderByDescending(keySelector, comparer);
    }
 
    public static EnumerableRowCollection<S> Select<TRow, S>(this TypedTableBase<TRow> source, Func<TRow, S> selector) where TRow : DataRow
    {
        DataSetUtil.CheckArgumentNull(source, "source");
        EnumerableRowCollection<TRow> source2 = new EnumerableRowCollection<TRow>(source);
        return source2.Select(selector);
    }
 
    public static EnumerableRowCollection<TRow> AsEnumerable<TRow>(this TypedTableBase<TRow> source) where TRow : DataRow
    {
        DataSetUtil.CheckArgumentNull(source, "source");
        return new EnumerableRowCollection<TRow>(source);
    }
 
    public static TRow? ElementAtOrDefault<TRow>(this TypedTableBase<TRow> source, int index) where TRow : DataRow
    {
        if (index >= 0 && index < source.Rows.Count)
        {
            return (TRow)source.Rows[index];
        }
        return null;
    }
}