Dynamically create series in MS Chart C#.net

Question

3.00/5 (1 vote)

See more:

I'm new to C# and .Net and am facing a problem within an MS chart I've created. I've searched and found answers to this question already, but although I have implemented the replies correctly, so I thought, I still have not been able to get it to work. The chart displays only the final series of the array (groups[3]). My code is as follows:

C#

string[] groups = new string[5];
        groups[0] = "MD";
        groups[1] = "SR";
        groups[2] = "TS";
        groups[3] = "WS";
        
        System.Drawing.Color[] clrs = new System.Drawing.Color[5];
        clrs[0] = System.Drawing.Color.Red;
    clrs[1] = System.Drawing.Color.Green;
        clrs[2] = System.Drawing.Color.MediumPurple;
        clrs[3] = System.Drawing.Color.Blue;
        clrs[4] = System.Drawing.Color.Orange;

        Chart1.ChartAreas["ChartArea1"].AxisX.Minimum = 0;
        Chart1.ChartAreas["ChartArea1"].AxisX.Maximum = 96;
        Chart1.ChartAreas["ChartArea1"].AxisX.Interval = 1;
        
        Chart1.ChartAreas["ChartArea1"].AxisY.Minimum = 0;
        Chart1.ChartAreas["ChartArea1"].AxisY.Maximum = 400;
        Chart1.ChartAreas["ChartArea1"].AxisY.Interval = 50;
        
        for (int cnt = 0; cnt < 4; cnt++)
        {
            com2.CommandText = "";
            com2.CommandText = "SELECT left(convert(varchar,Date,106),6) + char(10) as Date, occupancy FROM occupancy_projection WHERE specialtygroup = '" + groups[cnt] + "' order by convert(date,Date)";
            SqlDataReader reader = com2.ExecuteReader();


           Series aSeries = new Series();
           aSeries.Name = groups[cnt];


            Chart1.Series.Add(aSeries[cnt]);
            Chart1.Series[cnt].ChartType = SeriesChartType.Line;
            Chart1.Series[cnt].BorderWidth = 2;
            Chart1.Series[cnt].MarkerStyle = MarkerStyle.Circle;
            Chart1.Series[cnt].XValueMember = "Date";
            Chart1.Series[cnt].YValueMembers = "occupancy";
            Chart1.Series[cnt].Color = clrs[cnt];
            //Chart1.Series[cnt].Legend = "Legend1";

            Chart1.DataSource = reader;
            Chart1.DataBind();
            reader.Close();
            
            
                       
        }
        
        com.Dispose();
        con.Close();  
    }

I wonder if anyone can point out my error(s) here?

Thanks

Steve

Posted 9-Apr-13 3:57am

Steve I

Updated 9-Apr-13 4:47am

Leo Chapiro

v2

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Steve I · Accepted Answer · 2013-04-17T23:38:00

Solution 1

Answering my own question, this is not a solution to the problem as stated, but it solved the issue by means of a workaround: I altered the configuration of the data by getting the stored procedure to pivot it so that I was able to assign a column from the table to each series. I'm still curious to know why the above code didn't work though!

I now have another question about Chart Series which I will post separately.

Regards

Steve

Posted 17-Apr-13 23:38pm

Steve I

Comments

Member 8066974 11-Nov-13 11:11am

Can you post the full code solution?

Steve I 12-Nov-13 2:02am

The sp now produced a table of 6 cols (theDate, M, SR,TO, WS, Ad), the first being the date, the rest containing integer values assigned in each category to that date. The sp that produces this table is quite long and involved, so it's probably not practicable to reproduce it here.

The relevant c# code is this procedure:

protected void BindChartData()
{
groups[0] = "M";
groups[1] = "SR";
groups[2] = "TO";
groups[3] = "WS";
groups[4] = "Ad";

clrs[0] = Color.Red;
clrs[1] = Color.Green;
clrs[2] = Color.MediumPurple;
clrs[3] = Color.Blue;
clrs[4] = Color.SandyBrown;

if (Page.IsPostBack)
{
if (targetIt.Value == "Ok")
BindTargetChartData();
}
else
{
initialiseChartData(); // Binds data to a Gridview
}
com.Dispose();

Chart1.ChartAreas["ChartArea1"].AxisX.Minimum = 0;
Chart1.ChartAreas["ChartArea1"].AxisX.Maximum = 94;
Chart1.ChartAreas["ChartArea1"].AxisX.Interval = 1;
Chart1.ChartAreas["ChartArea1"].AxisY.Minimum = 0;
Chart1.ChartAreas["ChartArea1"].AxisY.Maximum = 400;
Chart1.ChartAreas["ChartArea1"].AxisY.Interval = 50;

Chart1.Series.Clear();

sqlStr = "SELECT left(convert(varchar,theDate,106),6) + char(10) as theDate, M, S, [TO], WS, Ad FROM occ_proj_tmp order by convert(date,theDate)";
com2.CommandText = sqlStr;
SqlDataReader reader = com2.ExecuteReader();

for (int cnt = 0; cnt < 5; cnt++)
{
addSeries( groups[cnt], clrs[cnt]);
}

Chart1.DataSource = reader;
Chart1.DataBind();

reader.Close();
com2.Dispose();
con.Close();
}

I hope these essentials make some sense and are of help. As I said, to post the whole code, including the stored procedure is probably not feasible.

Regards

Steve