i am getting an chart error: chart element already exists

Subin Thomas

7y2k.NET

my chart code

"Chart3" runat="server" Height="316px" align="left"
Width="431px" >
"Series3" ChartType="Pie" IsValueShownAsLabel="True"
Font="Microsoft Sans Serif, 8pt, style=Bold"
LabelBorderWidth="2" YValuesPerPoint="1" ChartArea="ChartArea1"
Legend="Default" LegendToolTip="#VAL( #PERCENT{P})" LabelToolTip="#VALX"
Label="#TOTAL">
"ChartArea1">
"True" />
"True">
"Center" Name="Default" TableStyle="Wide"
TitleSeparator="DoubleLine" Title="Scheme"
TitleFont="Microsoft Sans Serif, 10pt, style=Bold" TitleForeColor="Blue">

and my code behind is throwing an error at

this.Chart3.Legends.Add("Default");

its saying the chart element 'default' already exists in legendcollection

3 Replies

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Aniket Rana7y ago
hii , thomas

you are not properly implementing

expected line would be this

Chart3.Series.clear();

and you are adding this

Chart.Series.clear();
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Subin Thomas7y ago
hey aniket thanks for the response
i have added in the function but its showing error on series
protected void BindChart3()
       {

           string orgname = OrgNM;
           SqlConnection con = new SqlConnection(ppd_Vas);

           SqlCommand cmd = new SqlCommand("query", con);

           SqlDataAdapter sda = new SqlDataAdapter();
           con.Open();
           cmd.Connection = con;

           cmd.Parameters.AddWithValue("@orgname", orgname);
           sda.SelectCommand = cmd;

           DataSet gpfff = new DataSet();

           sda.Fill(gpfff);
           Chart3.DataSource = gpfff;


           Chart3.Series["Series3"].XValueMember = "Scheme";
           Chart3.Series["Series3"].YValueMembers = "Total";

           Chart3.DataBind();
           SqlDataReader reder = cmd.ExecuteReader();

           Chart3.Series["Series3"].Points.DataBind(reder, "Scheme", "Total", "Tooltip=Scheme,LabelToolTip=Total");
           this.Chart3.Series[0]["PieLabelStyle"] = "Outside";

           Chart.Series.clear();
           this.Chart3.Legends.Add("Legend3");
           this.Chart3.Legends[0].Enabled = true;
           this.Chart3.Legends[0].Docking = Docking.Bottom;
           this.Chart3.Legends[0].Alignment = System.Drawing.StringAlignment.Center;

           this.Chart3.Series[0].LegendText = "#VALX  ";


           this.Chart3.DataManipulator.Sort(PointSortOrder.Descending, Chart3.Series[0]);

           con.Close();

           foreach (DataPoint p in Chart3.Series["Series3"].Points)
           {
               p.Label = "#VALY \n (#PERCENT) ";
               p.LabelToolTip = "Project Count:- #VALY \n Project Type:- #VALX  \n  Percentage:- (#PERCENT) \n Total Count:-#TOTAL ";
               p.LegendToolTip = "Project Count:- #VALY \n Project Type:- #VALX  \n Percentage:- (#PERCENT) \n Total Count:-#TOTAL";
               p.ToolTip = "project Count:- #VALY \n Project Type:- #VALX  \n Percentage:- (#PERCENT) \n Total Count:-#TOTAL";
           }
       }
is it the correct way
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Aniket Rana7y ago
before binding chart series you want to clear old series

chart.Series.Clear();
0