dotNetCharting百分比显示小数

dotNetCharting使用百分比时是四写五入的，不现实小数位。只要加个函数设置一下接口。代码如下：

/// <summary>
/// 显示小数位
/// </summary>
/// <param name="chart"></param>
public void SetPecentChart(dotnetCHARTING.Chart chart)
{
    for (int i = 0; i < chart.SeriesCollection.Count; i++)
    {
         Series series = (Series)chart.SeriesCollection[i];
         for (int j = 0; j < series.Elements.Count; j++)
         {
             series.Elements[j].SmartLabel.Text = string.Format("{0:N2}", series.Elements[j].YValue);
         }
     }
}