Problem for creating Pie chart

[amrutha anil]

Hai,

I'm creating a simple program to display some values in a chart. The user can select the type of chart.But I'm having problem to create the pie chart. The problem is that I cannot combine two values into a single pie.Instead only by creating two chartseries. Pls help me to rectify the problem.

Thanks

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Telerik.Charting;
using Telerik.WinControls.UI;
using Telerik.WinControls;
using Telerik.WinControls.Primitives;
using FrmErdStatusChart.CallSignWebService;
using System.Collections;



namespace FrmErdStatusChart
{
    public partial class Form1 : RadForm
    {
        public Form1()
        {
            InitializeComponent();
            radChart1.ChartTitle.TextBlock.Text = "Status Chart";
            radChart1.Appearance.Border.Visible = false;
            radChart1.Appearance.FillStyle.MainColor = Color.Lavender;
            radChart1.PlotArea.Appearance.FillStyle.MainColor = System.Drawing.Color.Black;
            this.radChart1.Series[0].Appearance.LegendDisplayMode = Telerik.Charting.ChartSeriesLegendDisplayMode.Nothing;
            this.radChart1.Series[1].Appearance.LegendDisplayMode = Telerik.Charting.ChartSeriesLegendDisplayMode.Nothing;

        }
        CallSignWebService.CallSignWebService callsignWS = new CallSignWebService.CallSignWebService();
        ArrayList statusArray = new ArrayList();
        ChartSeries cs = new ChartSeries();
        ChartSeries cs1 = new ChartSeries();


        int online ;
        int offline ;
        string[] status = {"online" , "offline" };


        //Add the status ==> online
        public void AddAvailable()
        {
            cs.Clear();
            cs.Items.Add(new ChartSeriesItem(online));
            radChart1.Series.Add(cs);
            cs.Name = "Online " + online;
            radChart1.DataBind();
        }

        //Add status ==> offline
        public void AddOffline()
        {
            cs1.Clear();
            cs1.Items.Add(new ChartSeriesItem(offline));
            radChart1.Series.Add(cs1);
            cs1.Name = "offline "+offline;
            radChart1.DataBind();
        }


        //Get the status from the callsign
        public void addStatus()
        {
            callSign[] callSignList = callsignWS.findAll();
            foreach (callSign callSign in callSignList)
            {
               statusArray.Add(callSign.status);
           ///// Console.WriteLine(callSign.unit);

            }

        }

        //filter out the status according to online,offline
        public void addChart()
        {
            online = 0;
            offline = 0;


          /*  for (int i = 0; i < statusArray.Count; i++)
            {
                //counts status ==> online
                foreach (string online in statusArray)
                {
                    o++;
                }
                //counts status ==> offline
                foreach (string offline in statusArray)
                {
                    f++;
                }
                break;
            }*/
            for (int i = 0; i < statusArray.Count;i++ )
            {
                if (statusArray[i].ToString() == "Online")
                {
                    online++;
                }
                else offline++;

            }
            Console.WriteLine("Online ==> "+online);
            Console.WriteLine("Offline ==> "+offline);

        }


        private void radComboBox1_SelectedValueChanged(object sender, EventArgs e)
        {

        }

        private void radComboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {

            // Check whether an item in combo box is selected
            if (radComboBox1.SelectedItem != null)
            {
                //value is equal to pie
                if (radComboBox1.SelectedIndex == 0)
                {
                  /*  radChart1.Series.Clear();
                    ChartSeries cs2 = new ChartSeries();
                    cs2.Type = ChartSeriesType.Pie;

                    radChart1.Series.Add(cs2);
                    radChart1.DataSource = new int[] {o,f };
                    radChart1.DataBind();*/

                    AddOffline();
                    AddAvailable();

                    cs.Type = ChartSeriesType.Pie;
                    cs1.Type = ChartSeriesType.Pie;

                }
                //value is equal to bar
                else if (radComboBox1.SelectedIndex == 1)
                {

                    AddOffline();
                    AddAvailable();
                    cs.Type = ChartSeriesType.Bar;
                    cs1.Type = ChartSeriesType.Bar;

                }
                //Value is equal to point
                else if (radComboBox1.SelectedIndex == 2)
                {

                    AddOffline();
                    AddAvailable();
                    cs.Type = ChartSeriesType.Point;
                    cs1.Type = ChartSeriesType.Point;

                }
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            addStatus();
            addChart();
        }
    }
}

[Dwight]

Hello amrutha anil,

I am not sure what is that you want to achieve.  Please, provide sketch of what you expect to see and a screenshot of what the actual result is.

Best,
Joshua
the Telerik team

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items.

[amrutha anil]

Hai Joshua ,

Thanks for the response.I wanted to get a single pie chart for the two values 'online' and 'offline'. What i'm getting now is two different pie charts. I have attached the screenshot of the result.

Thanks.

[Dwight]

Hello amrutha,

What I see here is that in each and every case you create two data series for online and for offline, each containing a single data point. The Pie chart, however, generates one pie per series.

In order for the Pie scenario to work, you will need add both values in one ChartSeries instead of two.

Best wishes,
Joshua
the Telerik team

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items.

[amrutha anil]

Hai Joshua,

I tried to create the pie chart with a single chartseries. But I failed. Can you please give me an example on how to do it.

Thanks a lot!

[amrutha anil]

Hai Joshua,

Can you please help me by giving some code snippets to solve my problem. It will be a great help!

Thanks.

[Dwight]

Hello amrutha anil,

For the Pie, you need to use a single series:

public void AddForPieChart()
{
    radChart1.Series.Clear();

    ChartSeries cs = new ChartSeries();
    cs.Type = ChartSeriesType.Pie;

    ChartSeriesItem onlineItem = new ChartSeriesItem(online);
    onlineItem.Name = "Online " + online;

    ChartSeriesItem offlineItem = new ChartSeriesItem(offline);
    offlineItem.Name = "Offline " + offline;

    cs.Items.Add(onlineItem);
    cs.Items.Add(offlineItem);

    radChart1.Series.Add(cs);
}

For the Bar and Point you can use the same approach, but in order to get different colors and for the items, as well as different legend items, you need to set:

cs.Appearance.LegendDisplayMode = ChartSeriesLegendDisplayMode.ItemLabels;

Best,
Joshua
the Telerik team

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items.

[amrutha anil]

Hai Joshua,

It worked for me...Thanks for your support and thanks to Telerik Team.