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Help with sum in datatable

Johny Bravo
Johny Bravo asked
Last Modified: 2013-11-07

Hi Experts,
please have a look for the data I am having in datatable.Actually it is pivoted to get the data in required format.
For pivoting I am using code from codeproject by Felipe
 /// <summary>
        /// Gets a Inverted DataTable
        /// </summary>
        /// <param name="table">Provided DataTable</param>
        /// <param name="columnX">X Axis Column</param>
        /// <param name="columnY">Y Axis Column</param>
        /// <param name="columnZ">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 table, 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

            //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.

            //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>();

                foreach (DataRow dr in table.Rows)
                    if (!columnYValues.Contains(dr[columnY].ToString()))

                //Loop all Column Y Distinct Value
                foreach (string columnYValue in columnYValues)
                    //Creates a new Row
                    DataRow drReturn = returnTable.NewRow();
                    drReturn[0] = columnYValue;
                    //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)
                                        drReturn[rowColumnTitle] =
                                             Convert.ToDecimal(drReturn[rowColumnTitle]) +
                                        drReturn[rowColumnTitle] = dr[columnZ];
                                    drReturn[rowColumnTitle] = dr[columnZ];



                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;

Now I want to display sum horizontally and vertically of each row.
I am not using Gridview so that is not an option.
I need to calculate that in the datatable only.
How can I do this?Your help is really appreciated.Thanks.
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