/// <summary>
/// LINQ's OrderBy operator for generic EnumerableRowCollection.
/// </summary>
public static OrderedEnumerableRowCollection <TRow> OrderBy <TRow, TKey>(this TypedTableBase <TRow> source, Func <TRow, TKey> keySelector) where TRow : DataRow
{
DataSetUtil.CheckArgumentNull(nameof(source), "source");
EnumerableRowCollection <TRow> erc = new EnumerableRowCollection <TRow>(source);
return(erc.OrderBy(keySelector));
}
/// <summary>
/// Executes a Select (Projection) on EnumerableDataTable. If the selector returns a different
/// type than the type of rows, then AsLinqDataView is disabled, and the returning EnumerableDataTable
/// represents an enumerable over the LINQ Query.
/// </summary>
public static EnumerableRowCollection <S> Select <TRow, S>(this TypedTableBase <TRow> source, Func <TRow, S> selector) where TRow : DataRow
{
DataSetUtil.CheckArgumentNull(nameof(source), "source");
EnumerableRowCollection <TRow> erc = new EnumerableRowCollection <TRow>(source);
return(erc.Select(selector));
}
/// <summary>
/// LINQ's Where operator for generic EnumerableRowCollection.
/// </summary>
public static EnumerableRowCollection <TRow> Where <TRow>(this TypedTableBase <TRow> source, Func <TRow, bool> predicate) where TRow : DataRow
{
DataSetUtil.CheckArgumentNull(nameof(source), "source");
EnumerableRowCollection <TRow> erc = new EnumerableRowCollection <TRow>(source);
return(erc.Where(predicate));
}
/// <summary>
/// LINQ's OrderByDescending operator for generic EnumerableRowCollection.
/// </summary>
public static OrderedEnumerableRowCollection <TRow> OrderByDescending <TRow, TKey>(
this TypedTableBase <TRow> source,
Func <TRow, TKey> keySelector,
IComparer <TKey> comparer) where TRow : DataRow
{
DataSetUtil.CheckArgumentNull(source, nameof(source));
EnumerableRowCollection <TRow> erc = new EnumerableRowCollection <TRow>(source);
return(erc.OrderByDescending(keySelector, comparer));
}
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]);
}
else
{
return(default(TRow));
}
}
/// <summary>
/// This method returns a IEnumerable of TRow.
/// </summary>
/// <param name="source">The source DataTable to make enumerable.</param>
/// <returns>IEnumerable of datarows.</returns>
public static EnumerableRowCollection <TRow> AsEnumerable <TRow>(this TypedTableBase <TRow> source) where TRow : DataRow
{
DataSetUtil.CheckArgumentNull(nameof(source), "source");
return(new EnumerableRowCollection <TRow>(source as DataTable));
}
public static EnumerableRowCollection <TRow> Where <TRow> (this TypedTableBase <TRow> source, Func <TRow, bool> predicate)
where TRow : DataRow
{
return(new EnumerableRowCollection <TRow> (Enumerable.Where <TRow> (source, predicate)));
}
public static EnumerableRowCollection <S> Select <TRow, S> (this TypedTableBase <TRow> source, Func <TRow, S> selector)
where TRow : DataRow
{
return(new EnumerableRowCollection <S> (Enumerable.Select <TRow, S> (source, selector)));
}
public static OrderedEnumerableRowCollection <TRow> OrderByDescending <TRow, TKey> (this TypedTableBase <TRow> source, Func <TRow, TKey> keySelector, IComparer <TKey> comparer)
where TRow : DataRow
{
return(OrderedEnumerableRowCollection <TRow> .Create <TRow, TKey> (source, keySelector, comparer, true));
}
public static OrderedEnumerableRowCollection <TRow> OrderByDescending <TRow, TKey> (this TypedTableBase <TRow> source, Func <TRow, TKey> keySelector)
where TRow : DataRow
{
return(OrderByDescending <TRow, TKey> (source, keySelector, Comparer <TKey> .Default));
}
public static EnumerableRowCollection <TRow> AsEnumerable <TRow> (this TypedTableBase <TRow> source) where TRow : DataRow
{
return(new EnumerableRowCollection <TRow> (source));
}
