AreaChart 以线条下方的填充区域显示数据，适用于展示趋势的幅度和比较各系列的贡献。
示例
准备数据
var sheet = grid.CurrentWorksheet;
sheet["A2"] = new object[,] {
{ null, 2008, 2009, 2010, 2011, 2012 },
{ "City 1", 3, 2, 4, 2, 6 },
{ "City 2", 7, 5, 3, 6, 4 },
{ "City 3", 13, 10, 9, 10, 9 },
{ "Total", "=SUM(B3:B5)", "=SUM(C3:C5)", "=SUM(D3:D5)",
"=SUM(E3:E5)", "=SUM(F3:F5)" },
};
定义范围并创建图表
var dataRange = sheet.Ranges["B3:F5"];
var serialNamesRange = sheet.Ranges["A3:A5"];
var categoryNamesRange = sheet.Ranges["B2:F2"];
sheet.AddHighlightRange(categoryNamesRange);
sheet.AddHighlightRange(serialNamesRange);
sheet.AddHighlightRange(dataRange);
var chart = new Chart.AreaChart
{
Bounds = new Graphics.Rectangle(30, 150, 400, 240),
Title = "Area Chart Sample",
DataSource = new WorksheetChartDataSource(sheet, serialNamesRange, dataRange)
{
CategoryNameRange = categoryNamesRange,
},
};
sheet.FloatingObjects.Add(chart);
半透明区域
由于较大的区域可能覆盖较小的区域，您可以将所有系列设置为半透明：
foreach (var style in chart.DataSerialStyles)
{
style.FillColor = new Graphics.SolidColor(100, style.FillColor.ToSolidColor());
}