Problem with x-axis when exporting to PDF

[Rich]

I have a report that uses a line chart to show a trend of data across a date range. Code has been put in place to compensate for how the x-axis labels are rendered so that a large date range is readable. On the NeedDataSource event for the chart, I fetch the data then use the following code to adjust the x-axis label.

int labelStep = (dataList.Count / 10);

chartTrendByDay.DataSource = dataList;
if (labelStep == 0)
    labelStep = 1;
chartTrendByDay.PlotArea.XAxis.LabelStep = labelStep;

When viewing the report in the ReportViewer, the above code results from 1..10 points on the x-axis. The problem is, when exporting to PDF I end up with 1 point for each day (i.e. a report for the trend across the year results in 365 data points), which is unreadable in most circumstances. See attached for the viewer-vs-PDF screenshots.

Question: How to I fix the export to PDF so that the x-axis is readable?

[Steve]

Hello Rich,

As you probably know every time the report is previewed, paged or exported through the viewer it is processed and rendered from scratch. This means that the code in the chart NeedDataSource event would be executed once again and the axis labels would be re-added. You need to clear the Axis prior every execution i.e. chartTrendByDay.PlotArea.XAxis.Clear();

Greetings,
Steve
the Telerik team

[Rich]

I added the call to Clear() on the YAxis to the NeedDataSource event. It had no effect. Any other ideas?

[Steve]

Hi Rich,

We would need the whole code in the NeedDataSource event or best a sample runnable report that exhibits the problem. You can open a support ticket and attach the project there as only images are allowed in forums for security reasons.

All the best,
Steve
the Telerik team