将DataTable行列转换

    /// <summary>
    /// 将DataTable行列转换
    /// </summary>
    /// <param name="src">要转换的DataTable</param>
    /// <param name="columnHead">要作为Column的哪列</param>
    /// <returns></returns>
    public DataTable Col2Row(DataTable src, int columnHead)
    {
        DataTable result = new DataTable();
        DataColumn myHead = src.Columns[columnHead];
        result.Columns.Add(myHead.ColumnName);
        for (int i = 0; i < src.Rows.Count; i++)
        {
            result.Columns.Add(src.Rows[i][myHead].ToString());
        }
        //
        foreach (DataColumn col in src.Columns)
        {
            if (col == myHead)
                continue;
            object[] newRow = new object[src.Rows.Count + 1];
            newRow[0] = col.ColumnName;
            for (int i = 0; i < src.Rows.Count; i++)
            {
                newRow[i + 1] = src.Rows[i][col];
            }
            result.Rows.Add(newRow);
        }
        return result;
    }