Pie Chart - "Out of memory."

[vtech]

Hi,

We consistently get an "Out of memory." error when using GradientMode in a Pie Chart. 

No panic - we simply comment out this line

csi.Appearance.FillStyle.FillSettings.GradientMode = Telerik.Charting.Styles.GradientFillStyle.Center;

and all is fine.  The maximum # of items loaded in the series is 14.

Hope it's not something we're doing wrong!   :-)

Cheers ..

// .aspx

        <telerik:RadChart ID="uxBreakup" runat="server" Width="700px" Height="450px">
            <ChartTitle>
                <TextBlock Text="Recent Listings Category Breakup" />
             </ChartTitle>
        </telerik:RadChart>

        <telerik:RadChart ID="uxAllBreakup" runat="server" Width="700px" Height="450px">
            <ChartTitle>
                <TextBlock Text="All Listings Category Breakup" />
             </ChartTitle>
        </telerik:RadChart>

//---------------------------------------------------------------------------------------

// .aspx.cs

    public void BreakupReport()
    {
        DoBreakupReport(uxBreakup, reportStartDate, reportEndDate, "Breakup of Recent Listings");
        DoBreakupReport(uxAllBreakup, new DateTime(2000, 1, 1), new DateTime(2999, 1, 1), "Breakup of All Listings");
    }

    public void DoBreakupReport(RadChart uxChart, DateTime start, DateTime finish, string title)
    {
        Color[] colors = { Color.FromArgb(40, 0, 187, 239), Color.FromArgb(0, 187, 239),
                                    Color.FromArgb(40, 15, 191, 15), Color.FromArgb(15, 191, 15),
                                    Color.FromArgb(40, 255, 179, 62), Color.FromArgb(255, 179, 62),
                                    Color.FromArgb(40, 255, 79, 0), Color.FromArgb(255, 79, 0) };

        uxChart.Clear();
        ChartSeries csBreakup = uxChart.CreateSeries("Breakup", System.Drawing.Color.Goldenrod, System.Drawing.Color.Goldenrod, ChartSeriesType.Pie);

        using (FetchSQL sql = new FetchSQL(string.Format("SELECT c.CategoryName, Count(*) FROM vwclassifiedadverts a inner join classifiedcategories c on a.ParentCategoryID=c.CategoryID " +
                                            "WHERE StartUTC BETWEEN {0} AND {1} GROUP BY c.CategoryName ORDER BY c.CategoryName",
                                           DB.MySqlDateTime(start), DB.MySqlDateTime(finish))))
        {
            int i = 0;
            while (sql.Read())
            {
                ChartSeriesItem csi = new ChartSeriesItem(sql.AsInteger(1));
                csi.Label.TextBlock.Text = sql.AsString(0) + " - #%";
                csi.Name = sql.AsString(0);
                csi.Appearance.FillStyle.MainColor = colors[i * 2];
                csi.Appearance.FillStyle.SecondColor = colors[i * 2 + 1];
                csi.Appearance.Border.Color = Color.DimGray;
                csi.Appearance.FillStyle.FillType = Telerik.Charting.Styles.FillType.Gradient;
                //  .. this GradientFillStyle causes "OUt of Memory"
                csi.Appearance.FillStyle.FillSettings.GradientMode = Telerik.Charting.Styles.GradientFillStyle.Center;
                csBreakup.Items.Add(csi);
                i = (++i) % 4;
            }
        }

        uxChart.ChartTitle.TextBlock.Text = title;
    }


//---------------------------------------------------------------------------------------


[OutOfMemoryException: Out of memory.]
   System.Drawing.Drawing2D.PathGradientBrush..ctor(GraphicsPath path) +171505
   Telerik.Charting.RenderEngine.GetGradientBrush(RectangleF rect, FillStyle fill) +1673
   Telerik.Charting.RenderEngine.GetBrush(FillStyle fill, RectangleF rect) +963
   Telerik.Charting.RenderEngine.RenderPieSeries(ChartSeries series, Int32 seriesIndex) +2322
   Telerik.Charting.RenderEngine.Render(ChartSeries series, Int32 index) +639
   Telerik.Charting.RenderEngine.RenderPlotAreaElements(Boolean withGrid, Boolean withTicks) +861
   Telerik.Charting.RenderEngine.Render(IContainer element) +263
   Telerik.Charting.Chart.GetImage(Int32 width, Int32 height) +405

[ChartException: An Unexpected error has occurred. Please review the InnerException for more information how to resolve the problem.]
   Telerik.Charting.Chart.GetException(RenderEngine renderEngine, Exception ex) +455
   Telerik.Charting.Chart.GetImage(Int32 width, Int32 height) +639
   Telerik.Web.UI.RadChart.RenderClassic(HtmlTextWriter writer) +166
   Telerik.Web.UI.RadChart.RenderContents(HtmlTextWriter writer) +351
   System.Web.UI.WebControls.WebControl.Render(HtmlTextWriter writer) +29
   Telerik.Web.UI.RadDataBoundControl.Render(HtmlTextWriter writer) +9
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +22
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +130
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +24
   System.Web.UI.WebControls.WebControl.RenderContents(HtmlTextWriter writer) +7
   System.Web.UI.WebControls.WebControl.Render(HtmlTextWriter writer) +29
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +22
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +130
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +24
   System.Web.UI.Control.Render(HtmlTextWriter writer) +7
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +22
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +130
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +24
   System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) +59
   System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output) +68
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
   System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer) +37
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +130
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +24
   System.Web.UI.Control.Render(HtmlTextWriter writer) +7
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +22
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +130
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +24
   System.Web.UI.Page.Render(HtmlTextWriter writer) +26
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +22
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1896

[Giuseppe]

Hello vtech,

We tried to reproduce the problem with the provided code but unfortunately our efforts were not successful. Please review the attached sample application that uses your code (only the SQL is stripped and replaced) and let us know how we could observe the erroneous issue locally.


Sincerely yours,
Manuel
the Telerik team

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[vtech]

Hi,

Thanks very much for going to all that effort to check out the problem.  Awesome.

I downloaded your demo, and it worked perfectly, so I did some further investigation and reduced it to the actual data values.

This data, it crashed the sample app on my machine

double[] data = new double[] { 14, 25, 16, 7717, 18, 9, 243, 154, 138, 87, 335, 46, 230, 4255 };

Thanks again..   :-)

[Giuseppe]

Hi vtech,

Thank you for the follow-up.

Indeed now we are able to reproduce the problematic behavior and we must confirm it is a bug related to the specific gradient mode. Unfortunately we cannot suggest you a workaround at the moment and we would suggest you to use a different gradient mode for the time being (e.g. GradientFillStyle.Circle).

We have updated your Telerik points for the report.


All the best,
Manuel
the Telerik team

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