private void setupComparer(int count, IDataRowComparer comparer)
{
for (var i = 1; i <= count; i++)
{
var columnName = "Column" + i;
comparer.MatchOn <string>(columnName);
}
}
public CompositeComparer(IDataRowComparer comparer1, IDataRowComparer comparer2)
{
Debug.Assert(comparer1 != null);
Debug.Assert(comparer2 != null);
Debug.Assert(comparer1.ModelType == comparer2.ModelType);
_comparer1 = comparer1;
_comparer2 = comparer2;
}
/// <summary>
/// Adds sorting comparer to exiting DataRow comparer.
/// </summary>
/// <param name="orderBy">The existing DataRow comparer.</param>
/// <param name="thenBy">The sorting comparer to add.</param>
/// <returns>The result DataRow comparer.</returns>
public static IDataRowComparer ThenBy(this IDataRowComparer orderBy, IDataRowComparer thenBy)
{
orderBy.VerifyNotNull(nameof(orderBy));
thenBy.VerifyNotNull(nameof(thenBy));
if (orderBy.ModelType != thenBy.ModelType)
{
throw new ArgumentException(DiagnosticMessages.DataRowComparer_DifferentDataRowModel, nameof(thenBy));
}
return(ComparerBase.Create(orderBy, thenBy));
}
/// <summary>
/// Adds additional sorting column to existing DataRow comparer.
/// </summary>
/// <typeparam name="T">Data type of column.</typeparam>
/// <param name="orderBy">The existing DataRow comparer.</param>
/// <param name="column">The additional sorting column.</param>
/// <param name="direction">The sorting direction.</param>
/// <param name="comparer">Data value comparer.</param>
/// <returns>The result DataRow comparer.</returns>
public static IDataRowComparer ThenBy <T>(this IDataRowComparer orderBy, Column <T> column, SortDirection direction = SortDirection.Ascending, IComparer <T> comparer = null)
{
orderBy.VerifyNotNull(nameof(orderBy));
var thenBy = DataRow.OrderBy(column, direction, comparer);
if (orderBy.ModelType != thenBy.ModelType)
{
throw new ArgumentException(DiagnosticMessages.DataRowComparer_DifferentDataRowModel, nameof(column));
}
return(ComparerBase.Create(orderBy, thenBy));
}
private static IComparer <DataRow> GetOrderBy(IReadOnlyList <IColumnComparer> orderBy)
{
if (orderBy == null || orderBy.Count == 0)
{
return(null);
}
IDataRowComparer result = orderBy[0];
for (int i = 1; i < orderBy.Count; i++)
{
result = result.ThenBy(orderBy[i]);
}
return(result);
}
public static IDataRowComparer Create(IDataRowComparer comparer1, IDataRowComparer comparer2)
{
return(new CompositeComparer(comparer1, comparer2));
}
