How to create a pie chart from a datagridview for specific columns

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I have a datagridview with 5 columns and i want to make a pie chart on the press of button by taking only two columns of a datagridview
here is the picture of the datagridview

Image of the datagridview[^]
So from this datagridview i want to create the pie chart for category and total can i get help please :)

What I have tried:

private void generateChart_Click(object sender, EventArgs e)
        {
            Series s = pieChart.Series.Add("pie");
            s.ChartType = SeriesChartType.Pie;
            s.IsValueShownAsLabel = true;
            for (int colindex = 1; colindex < billingGridView.Columns.Count; colindex++)
            {
                s.Points.AddXY(billingGridView.Columns[colindex].HeaderText,
                               billingGridView[colindex, 0].Value);
            }

Posted 9-Jan-18 0:56am

MaddoxSt

Updated 9-Jan-18 3:57am

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Karthik_Mahalingam 9-Jan-18 9:45am

which two columns?

MaddoxSt 9-Jan-18 9:51am

the category and the total from the billinggridview i have a pic of it above

Maciej Los 9-Jan-18 11:14am

Does your DataGridView is bound with datasource? If yes, you have to use that source instead of reding data from DataGridViewRow.

1 solution

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Karthik_Mahalingam · Accepted Answer · 2018-01-09T03:57:00

Solution 1

Updated Solution

DataTable dtPieChartData = new DataTable();
          dtPieChartData.Columns.Add("Category");
          dtPieChartData.Columns.Add("Total");
          foreach (DataGridViewRow row in billingGridView.Rows)
          {
              int indexCategoryColumn = 1; // take care of index
              int indexTotalColumn = 4; // take care of index
              dtPieChartData.Rows.Add(row.Cells[indexCategoryColumn].Value,row.Cells[indexTotalColumn].Value);
          }

            chart1.DataSource = dtPieChartData;
           chart1.Series["Series1"].XValueMember = "Category";
           chart1.Series["Series1"].YValueMembers = "Total";
           this.chart1.Titles.Add("Category Title");
           chart1.Series["Series1"].ChartType = SeriesChartType.Pie;
           chart1.Series["Series1"].IsValueShownAsLabel = true;

Posted 9-Jan-18 3:57am

Karthik_Mahalingam

Updated 9-Jan-18 20:40pm

v2

Comments

MaddoxSt 9-Jan-18 23:02pm

Kathik Bangalore bro it throws an exception of
A chart element with the name 'PieChart' could not be found in the 'SeriesCollection'

Karthik_Mahalingam 9-Jan-18 23:11pm

You will have to use your chart series name

Karthik_Mahalingam 9-Jan-18 23:56pm

replace "PieChart" with "Pie"

MaddoxSt 10-Jan-18 0:12am

i checked it the name of the series was Series1 but when i changed it and press the button nothing happens

Karthik_Mahalingam 10-Jan-18 0:23am

try

DataTable dtPieChartData = new DataTable();
            dtPieChartData.Columns.Add("Category");
            dtPieChartData.Columns.Add("Total");
            dtPieChartData.Rows.Add("Category 1", 100);
            dtPieChartData.Rows.Add("Category 2", 200);
            dtPieChartData.Rows.Add("Category 3", 300); 
            chart1.DataSource = dtPieChartData; 
            chart1.Series["Series1"].XValueMember = "Category";
            chart1.Series["Series1"].YValueMembers = "Total";
            this.chart1.Titles.Add("Category Title");
            chart1.Series["Series1"].ChartType = SeriesChartType.Pie;
            chart1.Series["Series1"].IsValueShownAsLabel = true;

MaddoxSt 10-Jan-18 2:18am

Yeah this worked but i want to add the values from billingGridView's 1st and 4th index

Karthik_Mahalingam 10-Jan-18 2:19am

use this code to fill the table

DataTable dtPieChartData = new DataTable();
           dtPieChartData.Columns.Add("Category");
           dtPieChartData.Columns.Add("Total");

           DataGridView billingGridView = new DataGridView();
           foreach (DataGridViewRow row in billingGridView.Rows)
           {
               int indexCategoryColumn = 1; // take care of index
               int indexTotalColumn = 4; // take care of index
               dtPieChartData.Rows.Add(row.Cells[indexCategoryColumn],row.Cells[indexTotalColumn);
           }

MaddoxSt 10-Jan-18 2:28am

still not working i am feeling bad troubling you

Karthik_Mahalingam 10-Jan-18 2:34am


  DataTable dtPieChartData = new DataTable();
           dtPieChartData.Columns.Add("Category");
           dtPieChartData.Columns.Add("Total"); 
           foreach (DataGridViewRow row in billingGridView.Rows)
           {
               int indexCategoryColumn = 1; // take care of index
               int indexTotalColumn = 4; // take care of index
               dtPieChartData.Rows.Add(row.Cells[indexCategoryColumn].Value,row.Cells[indexTotalColumn].Value);
           }

             chart1.DataSource = dtPieChartData; 
            chart1.Series["Series1"].XValueMember = "Category";
            chart1.Series["Series1"].YValueMembers = "Total";
            this.chart1.Titles.Add("Category Title");
            chart1.Series["Series1"].ChartType = SeriesChartType.Pie;
            chart1.Series["Series1"].IsValueShownAsLabel = true;

MaddoxSt 10-Jan-18 2:38am

Finally worked thanks a lot for your help bro :)
can u change this on the top so i can mark it as worked solution?

Karthik_Mahalingam 10-Jan-18 2:41am

welcome :)
solution updated.