public DataTable Pivot(
DataTable src,
string VerticalColumnName,
string HorizontalColumnName,
string ValueColumnName)
{
DataTable dst = new DataTable();
if (src == null || src.Rows.Count == 0)
{
return(dst);
}
// find all distinct names for column and row
ArrayList ColumnValues = new ArrayList();
ArrayList RowValues = new ArrayList();
foreach (DataRow dr in src.Rows)
{
// find all column values
object column = dr[VerticalColumnName];
if (!ColumnValues.Contains(column))
{
ColumnValues.Add(column);
}
//find all row values
object row = dr[HorizontalColumnName];
if (!RowValues.Contains(row))
{
RowValues.Add(row);
}
}
ColumnValues.Sort();
RowValues.Sort();
//create columns
dst = new DataTable();
dst.Columns.Add(VerticalColumnName, src.Columns[VerticalColumnName].DataType);
Type t = src.Columns[ValueColumnName].DataType;
foreach (object ColumnNameInRow in RowValues)
{
dst.Columns.Add(ColumnNameInRow.ToString(), t);
}
//create destination rows
foreach (object RowName in ColumnValues)
{
DataRow NewRow = dst.NewRow();
NewRow[VerticalColumnName] = RowName.ToString();
dst.Rows.Add(NewRow);
}
//fill out pivot table
foreach (DataRow drSource in src.Rows)
{
object key = drSource[VerticalColumnName];
string ColumnNameInRow = Convert.ToString(drSource[HorizontalColumnName]);
int index = ColumnValues.IndexOf(key);
dst.Rows[index][ColumnNameInRow] = sum(dst.Rows[index][ColumnNameInRow], drSource[ValueColumnName]);
}
return(dst);
}
public string ConvertCoordinatesToShapeName(Vertex[] vertices)
{
ColNumber = SetColumnNumber();
RowName = SetRowName();
return(RowName.ToString() + ColNumber);
}
