C# Pivot Table

EmployeeID	OrderID	Amount	Cost	Date
`Sam`	`1`	`25`	`13`	`01/10/2007`
`Sam`	`2`	`512`	`1`	`02/10/2007`
`Sam`	`3`	`512`	`1`	`03/10/2007`
`Tom`	`4`	`50`	`1`	`04/10/2007`
`Tom`	`5`	`3`	`7`	`03/10/2007`
`Tom`	`6`	`78,75`	`12`	`02/10/2007`
`Sue`	`7`	`11`	`7`	`01/10/2007`
`Sue`	`8`	`2,5`	`66,2`	`02/10/2007`
`Sue`	`9`	`2,5`	`22`	`03/10/2007`
`Jack`	`10`	`6`	`23`	`02/10/2007`
`Jack`	`11`	`117`	`199`	`04/10/2007`
`Jack`	`12`	`13`	`2,6`	`01/10/2007`
`Jack`	`13`	`11,4`	`99,8`	`03/10/2007`
`Phill`	`14`	`37`	`2,1`	`02/10/2007`
`Phill`	`15`	`65,2`	`99,3`	`04/10/2007`
`Phill`	`16`	`34,1`	`27`	`02/10/2007`
`Phill`	`17`	`17`	`959`	`04/10/2007`

EmployeeID	01/12/2007	02/12/2007	03/12/2007	04/12/2007
`Sam`	`13`	`1`	`1`	`-`
`Tom`	`-`	`12`	`7`	`1`
`Sue`	`7`	`66,2`	`22`	`-`
`Jack`	`2,6`	`23`	`99,8`	`199`
`Phill`	`-`	`27`	`-`	`959`

i need add multi Y-AXIS (multi columns) -- ineed your help please

Super.

I didn't use it, but It's useful to see this approach.
I use two arrays for row/column names and a matrix for values.
I actually have a list of pivot tables where in each one the names/columns may differ, this makes it even more interesting Big Grin | :-D

Thank You, exactly what i was looking for.

using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using YMOReporting.Models;

namespace YMOReporting.Areas.Reportings.Controllers
{
    public class Proc1Controller : Controller
    {
        private TransactDBContext db = new TransactDBContext();

        // GET: Reportings/Proc1
        public ActionResult Index()
        {
            return View();
        }
        /// <summary>
        /// Gets a Inverted DataTable
        /// </summary>
        /// <param name="Proc1_Result">Provided DataTable</param>
        /// <param name="Week">X Axis Column</param>
        /// <param name="Planner">Y Axis Column</param>
        /// <param name="Value">Z Axis Column (values)</param>
        /// <param name="columnsToIgnore">Whether to ignore some column, it must be 
        /// provided here</param>
        /// <param name="nullValue">null Values to be filled</param> 
        /// <returns>C# Pivot Table Method  - Felipe Sabino</returns>
        public static DataTable GetInversedDataTable(DataTable Proc1_Result, string Week,
             string Planner, string Value, string nullValue, bool sumValues)
        {
            //Create a DataTable to Return
            DataTable returnTable = new DataTable();

            if (Week == "")
                Week = Proc1_Result.Columns[0].ColumnName;

            //Add a Column at the beginning of the table
            returnTable.Columns.Add(Planner);


            //Read all DISTINCT values from Week Column in the provided DataTale
            List<string> WeekValues = new List<string>();

            foreach (DataRow dr in Proc1_Result.Rows)
            {

                string WeekTemp = dr[Week].ToString();
                if (!WeekValues.Contains(WeekTemp))
                {
                    //Read each row value, if it's different from others provided, add to 
                    //the list of values and creates a new Column with its value.
                    WeekValues.Add(WeekTemp);
                    returnTable.Columns.Add(WeekTemp);
                }
            }

            //Verify if Y and Z Axis columns re provided
            if (Planner != "" && Value != "")
            {
                //Read DISTINCT Values for Y Axis Column
                List<string> PlannerValues = new List<string>();

                foreach (DataRow dr in Proc1_Result.Rows)
                {
                    if (!PlannerValues.Contains(dr[Planner].ToString()))
                        PlannerValues.Add(dr[Planner].ToString());
                }

                //Loop all Column Y Distinct Value
                foreach (string PlannerValue in PlannerValues)
                {
                    //Creates a new Row
                    DataRow drReturn = returnTable.NewRow();
                    drReturn[0] = PlannerValue;
                    //foreach column Y value, The rows are selected distincted
                    DataRow[] rows = Proc1_Result.Select(Planner + "='" + PlannerValue + "'");

                    //Read each row to fill the DataTable
                    foreach (DataRow dr in rows)
                    {
                        string rowColumnTitle = dr[Week].ToString();

                        //Read each column to fill the DataTable
                        foreach (DataColumn dc in returnTable.Columns)
                        {
                            if (dc.ColumnName == rowColumnTitle)
                            {
                                //If Sum of Values is True it try to perform a Sum
                                //If sum is not possible due to value types, the value 
                                // displayed is the last one read
                                if (sumValues)
                                {
                                    try
                                    {
                                        drReturn[rowColumnTitle] =
                                             Convert.ToDecimal(drReturn[rowColumnTitle]) +
                                             Convert.ToDecimal(dr[Value]);
                                    }
                                    catch
                                    {
                                        drReturn[rowColumnTitle] = dr[Value];
                                    }
                                }
                                else
                                {
                                    drReturn[rowColumnTitle] = dr[Value];
                                }
                            }
                        }
                    }
                    returnTable.Rows.Add(drReturn);
                }
            }
            else
            {
                throw new Exception("The columns to perform inversion are not provided");
            }

            //if a nullValue is provided, fill the datable with it
            if (nullValue != "")
            {
                foreach (DataRow dr in returnTable.Rows)
                {
                    foreach (DataColumn dc in returnTable.Columns)
                    {
                        if (dr[dc.ColumnName].ToString() == "")
                            dr[dc.ColumnName] = nullValue;
                    }
                }
            }

            return returnTable;
        }

    }
}

Thanks for the code, it is very usefull.
I have just one question, is it possible to sort the columns with Pivot option.

I have created a Datatable how looks like this

Articlenr | 600 | 210 | 300 | 900
xxx | 1 | 1 | 1 | 1
yyy | 1 | 1 | 1 | 1
zzz | 1 | 1 | 1 | 1

and it should be like this

Articlenr | 210 | 300 | 600 | 900
xxx | 1 | 1 | 1 | 1
yyy | 1 | 1 | 1 | 1
zzz | 1 | 1 | 1 | 1

Thanks for the feedback

While I am not a C# programmer, I was able to convert your code into VB.NET and it worked like a charm. Thank you so much.

Hi,
Thanks fo
r the post. Current code displays a simple pivot table.

I am trying to create a pivot table that has 2 X-Axis fields and 2 Y-Axis fields? How to modify this code to achieve this.

Thanks,
sarathi

Have you seen Anurag Gandhi's Response [^] ?

Pivoting DataTable Simplified[^]

Tks,

Felipe Sabino

C#

using System;
using System.Data;
using System.Collections;

namespace PivotTable
{
    /// <summary>
    /// Create simple and advanced pivot reports.
    /// </summary>
    public class PivotTable
    {
        #region Variables

        private DataTable _DataTable;

        #endregion Variables

        #region Constructors

        public PivotTable(DataTable dataTable)
        {
            _DataTable = dataTable;
        }

        #endregion Constructors

        #region Properties

        public DataTable ResultTable
        {
            get { return _DataTable; }
        }
        #endregion Properties

        #region Private Methods

        private string[] FindValues(string xAxisField, string xAxisValue, string yAxisField, string yAxisValue, string[] zAxisFields)
        {
            int zAxis = zAxisFields.Length;
            if (zAxis < 1)
                zAxis++;
            string[] zAxisValues = new string[zAxis];
            //set default values
            for (int i = 0; i <= zAxisValues.GetUpperBound(0); i++)
            {
                zAxisValues[i] = "0";
            }

            foreach (DataRow row in _DataTable.Rows)
            {
                if (Convert.ToString(row[xAxisField]) == xAxisValue && Convert.ToString(row[yAxisField]) == yAxisValue)
                {
                    for (int z = 0; z < zAxis; z++)
                    {
                        zAxisValues[z] = Convert.ToString(row[zAxisFields[z]]);
                    }
                    break;
                }
            }

            return zAxisValues;
        }

        private string FindValue(string xAxisField, string xAxisValue, string yAxisField, string yAxisValue, string zAxisField)
        {
            string zAxisValue = "";

            foreach (DataRow row in _DataTable.Rows)
            {
                if (Convert.ToString(row[xAxisField]) == xAxisValue && Convert.ToString(row[yAxisField]) == yAxisValue)
                {
                    zAxisValue = Convert.ToString(row[zAxisField]);
                    break;
                }
            }

            return zAxisValue;
        }
        #endregion Private Methods

        #region Public Methods

        /// <summary>
        /// Creates an advanced 3D Pivot table.
        /// </summary>
        /// <param name="xAxisField">The main heading at the top of the report.</param>
        /// <param name="yAxisField">The heading on the left of the report.</param>
        /// <param name="zAxisFields">The sub heading at the top of the report.</param>
        /// <param name="mainColumnName">Name of the column in xAxis.</param>
        /// <param name="columnTotalName">Name of the column with the totals.</param>
        /// <param name="rowTotalName">Name of the row with the totals.</param>
        /// <param name="zAxisFieldsNames">Name of the columns in the zAxis.</param>
        /// <returns>HtmlTable Control.</returns>
        public DataTable Generate(string xAxisField, string yAxisField, string[] zAxisFields, string mainColumnName, string columnTotalName, string rowTotalName, string[] zAxisFieldsNames)
        {

            /*
             * The x-axis is the main horizontal row.
             * The z-axis is the sub horizontal row.
             * The y-axis is the left vertical column.
             */

            //get distinct xAxisFields
            ArrayList xAxis = new ArrayList();
            foreach (DataRow row in _DataTable.Rows)
            {
                if (!xAxis.Contains(row[xAxisField]))
                    xAxis.Add(row[xAxisField]);
            }

            //get distinct yAxisFields
            ArrayList yAxis = new ArrayList();
            foreach (DataRow row in _DataTable.Rows)
            {
                if (!yAxis.Contains(row[yAxisField]))
                    yAxis.Add(row[yAxisField]);
            }

            //create a 2D array for the y-axis/z-axis fields
            int zAxis = zAxisFields.Length;
            if (zAxis < 1)
                zAxis = 1;
            string[,] matrix = new string[(xAxis.Count * zAxis), yAxis.Count];

            for (int y = 0; y < yAxis.Count; y++) //loop thru y-axis fields
            {
                //rows
                for (int x = 0; x < xAxis.Count; x++) //loop thru x-axis fields
                {
                    //main columns
                    //get the z-axis values
                    string[] zAxisValues = FindValues(xAxisField, Convert.ToString(xAxis[x])
                                                      , yAxisField, Convert.ToString(yAxis[y]), zAxisFields);
                    for (int z = 0; z < zAxis; z++) //loop thru z-axis fields
                    {
                        //sub columns
                        matrix[(((x + 1) * zAxis - zAxis) + z), y] = zAxisValues[z];
                    }
                }
            }

            //calculate totals for the y-axis
            decimal[] yTotals = new decimal[(xAxis.Count * zAxis)];
            for (int col = 0; col < (xAxis.Count * zAxis); col++)
            {
                yTotals[col] = 0;
                for (int row = 0; row < yAxis.Count; row++)
                {
                    yTotals[col] += Convert.ToDecimal("0" + matrix[col, row]);
                }
            }

            //calculate totals for the x-axis
            decimal[,] xTotals = new decimal[zAxis, (yAxis.Count + 1)];
            for (int y = 0; y < yAxis.Count; y++) //loop thru the y-axis
            {
                int zCount = 0;
                for (int z = 0; z < (zAxis * xAxis.Count); z++) //loop thru the z-axis
                {
                    xTotals[zCount, y] += Convert.ToDecimal("0" + matrix[z, y]);
                    if (zCount == (zAxis - 1))
                        zCount = 0;
                    else
                        zCount++;
                }
            }
            for (int xx = 0; xx < zAxis; xx++) //Grand Total
            {
                for (int xy = 0; xy < yAxis.Count; xy++)
                {
                    xTotals[xx, yAxis.Count] += xTotals[xx, xy];
                }
            }

            //Build HTML Table
            //Append main row (x-axis)
            DataTable table = new DataTable();
            DataColumn columnYTitle = new DataColumn(mainColumnName);
            table.Columns.Add(columnYTitle);

            for (int x = 0; x <= xAxis.Count; x++) //loop thru x-axis + 1
            {
                if (x < xAxis.Count)
                {
                      for (int z = 0; z < zAxis; z++)
                      {
                          DataColumn column = new DataColumn();
                          column.ColumnName = Convert.ToString(xAxis[x] + " - " + zAxisFieldsNames[z]);
                          table.Columns.Add(column);
                      }
                }
                else
                {
                    for (int z = 0; z < zAxis; z++)
                    {
                        DataColumn column = new DataColumn();
                        column.ColumnName = columnTotalName + " - " + zAxisFieldsNames[z];
                        table.Columns.Add(column);
                    }
                }
            }

            
            //Append table items from matrix
            for (int y = 0; y < yAxis.Count; y++) //loop thru y-axis
            {
                DataRow dataRow = table.NewRow();
                for (int z = 0; z <= (zAxis * xAxis.Count); z++) //loop thru z-axis + 1
                {
                    if (z == 0)
                    {
                        dataRow[z] = Convert.ToString(yAxis[y]);
                    }
                    else
                    {
                        dataRow[z] = Convert.ToString(matrix[(z - 1), y]);
                    }
                }

                //append x-axis grand totals
                for (int z = zAxis * xAxis.Count; z < zAxis + (zAxis * xAxis.Count); z++)
                {
                    dataRow[z + 1] = Convert.ToString(xTotals[z - (zAxis * xAxis.Count), y]);
                 
                }
                table.Rows.Add(dataRow);
            }

            //append y-axis totals
            DataRow dataRowTotals = table.NewRow();
            for (int x = 0; x <= (zAxis * xAxis.Count); x++)
            {
                if (x == 0)
                    dataRowTotals[0] = rowTotalName;
                else
                    dataRowTotals[x] = Convert.ToString(yTotals[x - 1]);
            }

            //append x-axis/y-axis totals
            for (int z = 0; z < zAxis; z++)
            {
                dataRowTotals[table.Columns.Count - zAxis + z] = Convert.ToString(xTotals[z, xTotals.GetUpperBound(1)]);
            }
            table.Rows.Add(dataRowTotals);

            return table;
        }

        /// <summary>
        /// Creates a simple 3D Pivot Table.
        /// </summary>
        /// <param name="xAxisField">The heading at the top of the table.</param>
        /// <param name="yAxisField">The heading to the left of the table.</param>
        /// <param name="zAxisField">The item value field.</param>
        /// <param name="mainColumnName">Title of the main column</param>
        /// <param name="columnTotalName">Title of the total column</param>
        /// <param name="rowTotalName">Title of the row column</param>
        /// <returns></returns>
        public DataTable Generate(string xAxisField, string yAxisField, string zAxisField, string mainColumnName, string columnTotalName, string rowTotalName)
        {
            return Generate(xAxisField, yAxisField, new string[0], new string[0], zAxisField, mainColumnName, columnTotalName, rowTotalName);
        }

        /// <summary>
        /// Creates a simple 3D Pivot Table.
        /// </summary>
        /// <param name="xAxisField">The heading at the top of the table.</param>
        /// <param name="yAxisField">The heading to the left of the table.</param>
        /// <param name="yAxisInfoFields">Other columns that we want to show on the y axis.</param>
        /// <param name="yAxisInfoFieldsNames">Title of the additionnal columns on y axis.</param>
        /// <param name="zAxisField">The item value field.</param>
        /// <param name="mainColumnName">Title of the main column</param>
        /// <param name="columnTotalName">Title of the total column</param>
        /// <param name="rowTotalName">Title of the row column</param>
        /// <returns></returns>
        public DataTable Generate(string xAxisField, string yAxisField, string[] yAxisInfoFields, string[] yAxisInfoFieldsNames, string zAxisField, string mainColumnName, string columnTotalName, string rowTotalName)
        {
            //style table
            /*
             * The x-axis is the main horizontal row.
             * The z-axis is the sub horizontal row.
             * The y-axis is the left vertical column.
             */

            //get distinct xAxisFields
            ArrayList xAxis = new ArrayList();
            foreach (DataRow row in _DataTable.Rows)
            {
                if (!xAxis.Contains(row[xAxisField]))
                    xAxis.Add(row[xAxisField]);
            }

            //get distinct yAxisFields
            ArrayList yAxis = new ArrayList();
            foreach (DataRow row in _DataTable.Rows)
            {
                if (!yAxis.Contains(row[yAxisField]))
                    yAxis.Add(row[yAxisField]);
            }

            //create a 2D array for the x-axis/y-axis fields
            string[,] matrix = new string[xAxis.Count, yAxis.Count];

            for (int y = 0; y < yAxis.Count; y++) //loop thru y-axis fields
            {
                //rows
                for (int x = 0; x < xAxis.Count; x++) //loop thru x-axis fields
                {
                    //main columns
                    //get the z-axis values
                    string zAxisValue = FindValue(xAxisField, Convert.ToString(xAxis[x])
                                                  , yAxisField, Convert.ToString(yAxis[y]), zAxisField);
                    matrix[x, y] = zAxisValue;
                }
            }

            //calculate totals for the y-axis
            decimal[] yTotals = new decimal[xAxis.Count];
            for (int col = 0; col < xAxis.Count; col++)
            {
                yTotals[col] = 0;
                for (int row = 0; row < yAxis.Count; row++)
                {
                    yTotals[col] += Convert.ToDecimal("0" + matrix[col, row]);
                }
            }

            //calculate totals for the x-axis
            decimal[] xTotals = new decimal[(yAxis.Count + 1)];
            for (int row = 0; row < yAxis.Count; row++)
            {
                xTotals[row] = 0;
                for (int col = 0; col < xAxis.Count; col++)
                {
                    xTotals[row] += Convert.ToDecimal("0" + matrix[col, row]);
                }
            }
            xTotals[xTotals.GetUpperBound(0)] = 0; //Grand Total
            for (int i = 0; i < xTotals.GetUpperBound(0); i++)
            {
                xTotals[xTotals.GetUpperBound(0)] += xTotals[i];
            }

            //Build HTML Table

            //Build HTML Table
            //Append main row (x-axis)
            DataTable table = new DataTable();
            DataColumn columnYTitle = new DataColumn(mainColumnName);

            foreach (string yAxisInfoFieldsName in yAxisInfoFieldsNames)
            {
                table.Columns.Add(yAxisInfoFieldsName);
            }

            table.Columns.Add(columnYTitle);

            for (int x = 0; x <= xAxis.Count; x++) //loop thru x-axis + 1
            {
                if (x < xAxis.Count)
                {
                    DataColumn column = new DataColumn();
                    column.ColumnName = Convert.ToString(xAxis[x]);
                    table.Columns.Add(column);
                }
                else
                {
                    DataColumn column = new DataColumn(columnTotalName);
                    table.Columns.Add(column);
                }
            }

            //Append table items from matrix
            for (int y = 0; y < yAxis.Count; y++) //loop thru y-axis
            {
                DataRow dataRow = table.NewRow();
                for (int z = 0; z <= xAxis.Count + yAxisInfoFieldsNames.Length; z++) //loop thru z-axis + 1
                {
                    if (z < yAxisInfoFieldsNames.Length)
                    {
                        dataRow[z] = Convert.ToString(_DataTable.Rows[y][yAxisInfoFields[z]]);
                    }
                    if (z == yAxisInfoFieldsNames.Length)
                    {
                        dataRow[z] = Convert.ToString(yAxis[y]);
                    }
                    if (z > yAxisInfoFieldsNames.Length)
                    {
                        dataRow[z] = Convert.ToString(matrix[(z - 1 - yAxisInfoFieldsNames.Length), y]);
                    }
                }


                dataRow[xAxis.Count + yAxisInfoFieldsNames.Length  + 1] = Convert.ToString(xTotals[y]);

                table.Rows.Add(dataRow);
            }

            //append y-axis totals
            DataRow dataRowTotals = table.NewRow();
            for (int x = 0; x <= (xAxis.Count + 1) + yAxisInfoFieldsNames.Length; x++)
            {
                if (x == 0)
                {
                    dataRowTotals[0] = rowTotalName;
                }
                if (x > yAxisInfoFieldsNames.Length)
                {
                    if (x <= xAxis.Count + yAxisInfoFieldsNames.Length)
                        dataRowTotals[x] = Convert.ToString(yTotals[(x - 1 - yAxisInfoFieldsNames.Length)]);
                    else
                        dataRowTotals[x] = Convert.ToString(xTotals[xTotals.GetUpperBound(0)]);
                }
            }
            table.Rows.Add(dataRowTotals);

            return table;
        }

        #endregion Public Methods
    }
}

You may wish to see this[^] also.

Anurag Gandhi.
http://www.gandhisoft.com
Life is a computer program and every one is the programmer of his own life.
My latest article: Group GridView Data

Great too, but was I was realy looking for was one that return back a Datatable. Thx

The PivotData Method returns DataTable only. Smile | :)

Please elaborate in case u need something else.

Anurag Gandhi.
http://www.gandhisoft.com
Life is a computer program and every one is the programmer of his own life.
My latest article: Group GridView Data

Very Good

Nice

A small team of reporting analysts stared at the screen in awe today here in Sydney Australia watching a SqlDataSource being transposed beautifully into a pivot style gridview.

I quote "This is an absolute cracker!"

Thank you so much for posting this Felipe.

Best Regards
Adrian

uow! Very glad to hear that and to be able to help! Awesome!

Felipe Sabino

Hi felipesabino,
I am using your function for pivoting several times in my app.
DataTable dtEmp = objEmployee.GetEmployeeGroupwiseCount(GrpId);
DataTable dtReturn = GetInversedDataTable(dtEmp, "DesignationName", "SubGroup", "EmpCount", " ", true);

What I want is,I need SubGroupId which is avalable in dtEmp.
I needed this because,there may be duplcate names for SubGroup so I can identify them by ID.
Is there any way I can get the SubGroupId along with SubGroupName.

Also is it possible to have Row-wise and columnwise count(of course except first column)

Thanks

modified on Friday, October 22, 2010 6:57 AM

Hi,

I am glad this article was useful for you!

Regarding your question, I believe there will be no way to do what you want just using the method...

What you can do is use the SubGroupId instead of the SubGroup when calling the method, so, after properly pivoting your data using the SubGroupId you can go through the datatable and change each subgroupid to its name.

DataTable dtReturn = GetInversedDataTable(dtEmp, "DesignationName", "SubGroupId", "EmpCount", " ", true);
foreach(DataRow row in dtReturn.Rows)
{
    string subGroupId = row[0].ToString();
    string subGroupName = SomeMethodOrCodeToGetYouGoupNameByTheId(subGroupId);
    row[0] = subGroupName;
}

Hope that was helpeful.

Cheers,

Felipe Sabino

Hmm that is one way.Thanks.
I modified the method a little to add the id column with value.
Please check.It worked for me.Let me know if this can go wrong.
Still trying to get row-wise and column-wise sum.

public static DataTable GetInversedDataTable(DataTable table,string myColumn, string columnX,
string columnY, string columnZ, string nullValue, bool sumValues)
{
//Create a DataTable to Return
DataTable returnTable = new DataTable();

if (columnX == "")
columnX = table.Columns[0].ColumnName;

//Add a Column at the beginning of the table
returnTable.Columns.Add(columnY);
returnTable.Columns.Add(myColumn);

//Read all DISTINCT values from columnX Column in the provided DataTale
List<string> columnXValues = new List<string>();

foreach (DataRow dr in table.Rows)
{

string columnXTemp = dr[columnX].ToString();
if (!columnXValues.Contains(columnXTemp))
{
//Read each row value, if it's different from others provided, add to
//the list of values and creates a new Column with its value.
columnXValues.Add(columnXTemp);
returnTable.Columns.Add(columnXTemp);
}
}

//Verify if Y and Z Axis columns re provided
if (columnY != "" && columnZ != "")
{
//Read DISTINCT Values for Y Axis Column
List<string> columnYValues = new List<string>();
List<string> columnMyValues = new List<string>();

foreach (DataRow dr in table.Rows)
{
if (!columnYValues.Contains(dr[columnY].ToString()))
{
columnYValues.Add(dr[columnY].ToString());
}
}
foreach (DataRow dr in table.Rows)
{
if (!columnMyValues.Contains(dr[myColumn].ToString()))
columnMyValues.Add(dr[myColumn].ToString());

}

List<string> mycolumnValues = new List<string>();

int i = 0;
//Loop all Column Y Distinct Value
foreach (string columnYValue in columnYValues)
{

//Creates a new Row
DataRow drReturn = returnTable.NewRow();
drReturn[0] = columnYValue;
drReturn[1] = columnMyValues[i];
i++;
//foreach column Y value, The rows are selected distincted
DataRow[] rows = table.Select(columnY + "='" + columnYValue + "'");

//Read each row to fill the DataTable
foreach (DataRow dr in rows)
{
string rowColumnTitle = dr[columnX].ToString();

//Read each column to fill the DataTable
foreach (DataColumn dc in returnTable.Columns)
{
if (dc.ColumnName == rowColumnTitle)
{
//If Sum of Values is True it try to perform a Sum
//If sum is not possible due to value types, the value
// displayed is the last one read
if (sumValues)
{
try
{
drReturn[rowColumnTitle] =
Convert.ToDecimal(drReturn[rowColumnTitle]) +
Convert.ToDecimal(dr[columnZ]);
}
catch
{
drReturn[rowColumnTitle] = dr[columnZ];
}
}
else
{
drReturn[rowColumnTitle] = dr[columnZ];
}

}
}
}

returnTable.Rows.Add(drReturn);
}

}
else
{
throw new Exception("The columns to perform inversion are not provided");
}

//if a nullValue is provided, fill the datable with it
if (nullValue != "")
{
foreach (DataRow dr in returnTable.Rows)
{
foreach (DataColumn dc in returnTable.Columns)
{
if (dr[dc.ColumnName].ToString() == "")
dr[dc.ColumnName] = nullValue;
}
}
}

return returnTable;
}

thank you i cant add multi columns !!!

after lots of time googling,I came to this post and finally I get a very nice solution.
Thank you very much.Cheers Smile | :)

You are welcome!

I am glad it helped. And feel free to report any bug or suggestion.

Cheers

Felipe Sabino

I've modified your code to C++ and made a small change, so that the headers are sorted based on numerical value when applicable.
When I tried using the code using an example with decimal headers, the appropriate row and column headers appeared sorted by numerical value.
However, there were rows and columns that were all missing. I think this has to do with the formatting of strings not displaying enough digits to satisfy the equality test in the filter. Do you have an idea how to fix this? I am not that experienced with managed code to test for a decimal System::Object and format the string to say 15 decimals if the object is a decimal, real, float, etc..

You have an interesting point but I guess the way the algorithm was implemented you won't be able to use any float point object (as decimal, real, float) as the Table Header...
The ColumnName property of Datacolumn class is a string and it is the one the framework uses to do the filtering when using the DataTable.Select() Method.
A simple solution to your problem would be creating a new column in the source DataTable that has the same values as the float point column that you want to use as header but converted to string with the amount of decimal cases that you would like to consider.

Thanks,

Felipe Sabino

Felipe Sabino

C# Pivot Table

Introduction

The Pivot Methods

First - Simple Inversion

Second - Pivoting

Using the Code

First - Simple Inversion

Second - Pivot Table

Points of Interest

History

License

Comments and Discussions