public static NTuples[] CrossDataRows(DataRow[][] possibleRows, NTuples[] possibleRowsTuple = null)
{
if (possibleRowsTuple == null)
{
return(possibleRows.Select(r => { var tup = new NTuples(1); tup.AddToTuple(r); return tup; }).ToArray());
}
else
{
var newPossibleRowTuple = new List <NTuples>();
foreach (var rows in possibleRows)
{
foreach (var rowTuple in possibleRowsTuple)
{
var newRowTuple = new NTuples(rowTuple.TupleSize + 1);
foreach (var tup in rowTuple.Tuple)
{
newRowTuple.AddToTuple(tup);
}
newRowTuple.AddToTuple(rows);
newPossibleRowTuple.Add(newRowTuple);
}
}
return(newPossibleRowTuple.ToArray());
}
}
public static DataTable CrossTable(DataTable table1, DataTable table2 = null)
{
if (table2 == null)
{
return(table1);
}
if (table1.TableName == table2.TableName)
{
table2.TableName += "I";
}
var product = new DataTable($"{table1.TableName}_X_{table2.TableName}");
var tupList = new List <NTuples>();
foreach (var table in new[] { table1, table2 })
{
foreach (DataColumn col in table.Columns)
{
DataColumn newCol = new DataColumn($"{table.TableName}.{col.ColumnName}", col.DataType);
product.Columns.Add(newCol);
}
}
foreach (DataRow table1Row in table1.Rows)
{
foreach (DataRow table2Row in table2.Rows)
{
var tup = new NTuples(2);
tup.AddToTuple(table1Row);
tup.AddToTuple(table2Row);
tupList.Add(tup);
}
}
foreach (var tup in tupList)
{
DataRow newRow = product.NewRow();
foreach (DataRow ele in tup.Tuple)
{
foreach (DataColumn col in ele.Table.Columns)
{
newRow[$"{ele.Table.TableName}.{col.ColumnName}"] = ele[col.ColumnName];
}
}
product.Rows.Add(newRow);
}
return(product);
}
