A chart element already exists in seriescollection

Question

Hi All,

I am using VS2008 to generate multi series graphs. I am getting error "A chart element already exists in seriescollection". The dataset which i am getting from database is like this

Period    MinET    MeanET    MaxET
====    ====   =====    =====
Latest      19         545         12345
Previous    20         542          23644
Last1week 19        234         365478
========================
My Code is like this:

 

foreach (DataRow row in dsAll.Tables[0].Rows)

{

 

string seriesName1 = row["MinEt"].ToString();

 

string seriesName2 = row["MeanEt"].ToString();

 

string seriesName3 = row["MaxEt"].ToString();

Chart1.Series.Add(seriesName1);

Chart1.Series.Add(seriesName2);

Chart1.Series.Add(seriesName3);

Chart1.Series[seriesName1].ChartType = System.Web.UI.DataVisualization.Charting.

SeriesChartType.Line;

Chart1.Series[seriesName1].BorderWidth = 2;

Chart1.Series[seriesName2].ChartType = System.Web.UI.DataVisualization.Charting.

SeriesChartType.Line;

Chart1.Series[seriesName2].BorderWidth = 2;

Chart1.Series[seriesName3].ChartType = System.Web.UI.DataVisualization.Charting.

SeriesChartType.Line;

Chart1.Series[seriesName3].BorderWidth = 2;

 

 

for (int colIndex = 2; colIndex < dsAll.Tables[0].Columns.Count; colIndex++)

{

 

string columnName = dsAll.Tables[0].Columns[colIndex].ColumnName;

 

int YVal = (int)row[columnName];

Chart1.Series[seriesName1].Points.AddXY(columnName, YVal);

}

}
It is throwing error "A chart element with the name '19' already exists in the 'SeriesCollection'".

If anybody knows solution to this please help me.

Thanks in Advance,
Sarat Chandra

Answer 1

This means that you are trying to add the series with the name which already exsists in the collection. Series names need to be unique.

Alex.

---

http://blogs.msdn.com/alexgor

Answer 2

Hi,

I am creating three different series with different names. Still it is giving same problem(refer the code above). If anyone know the solution about this ..please help me..

Thanks in advance..
Sarat Chandra

Answer 3

In your code you create Series with name "MinEt" multiple times in the loop of data rows.

Alex.

---

http://blogs.msdn.com/alexgor

Answer 4

different but you refer them maybe several times in your code, so use series.clear...