Unfortunately with the current implementation of the RadChartView control there is no way to prevent the labels from overlapping. You can try making the charting component larger so that the labels have enough space or you can use different type of charting component.
However, I am happy to inform you that we already implemented a feature allowing users to generate smart labels in the RadPieChart. They are smart because they are not overlapping one over another. It is similar to the feature demonstrated in this online demo
. This feature will be available within our next official release.
Please stay tuned for the release so that you can take advantage of the feature.
Pavel R. Pavlov
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