// 静态工厂方法有什么作用？
public static IChart GetChart(string type)
{
IChart chart = null;
if (type.Equals("histo"))
{
chart = new HistogramChart();
Console.WriteLine("初始化设置柱状图！");
}
else if (type.Equals("pie"))
{
chart = new PieChart();
Console.WriteLine("初始化设置饼状图！");
}
else if (type.Equals("line"))
{
chart = new HistogramChart();
Console.WriteLine("初始化设置折线图！");
}
return(chart);
}
public static IChartable GetChart(string type)
{
IChartable chart = null;
if (type.Equals("histogram", StringComparison.OrdinalIgnoreCase))
{
chart = new HistogramChart();
Console.WriteLine("初始化设置柱状图...");
}
else if (type.Equals("pie", StringComparison.OrdinalIgnoreCase))
{
chart = new PieChart();
Console.WriteLine("初始化设置饼状图...");
}
else if (type.Equals("line", StringComparison.OrdinalIgnoreCase))
{
chart = new LineChart();
Console.WriteLine("初始化设置折线图...");
}
return(chart);
}
