C# Microsoft Chart Controls/Dundas Charts 清除内容？
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Microsoft Chart Controls/Dundas Charts Clear Contents?
提问by Goober
I am using the Dundas Chart Controls and Microsoft Chart Controls for .NET. Currently I have a method which populates the chart control with a date from a generic List.
我正在使用 Dundas Chart Controls 和 Microsoft Chart Controls for .NET。目前我有一种方法可以用通用列表中的日期填充图表控件。
Let's say that I populate the chart with data from one list. Then I want to populate the chart with data from another list.
假设我使用一个列表中的数据填充图表。然后我想用另一个列表中的数据填充图表。
I have a problem populating the chart with the data from the second list. I end up with a chart that displays the combined data from list 1 and list 2, whereas I want it to display only the data from the first list, and then clear the chart before displaying the data from the second list.
我在用第二个列表中的数据填充图表时遇到问题。我最终得到一个显示列表 1 和列表 2 中合并数据的图表，而我希望它只显示第一个列表中的数据，然后在显示第二个列表中的数据之前清除图表。
I have tried various method calls to clear the chart control before populating it with the data from the second list but to no avail.
在用第二个列表中的数据填充图表控件之前，我尝试了各种方法调用来清除图表控件，但无济于事。
Is there a way of doing this?
有没有办法做到这一点？
采纳答案by Goober
I found it! Do this:
我找到了！做这个：
chart1.Series[0].Points.Clear();
回答by casperOne
You should probably post some example code.
您可能应该发布一些示例代码。
However, I would guess it is simply a matter of resetting the data source. Assuming you have a list of points (or some other structure), you should probably create a new instance of that data container (i.e. the list), populate that, and then assign it to the chart.
但是，我想这只是重置数据源的问题。假设您有一个点列表（或一些其他结构），您可能应该创建该数据容器（即列表）的新实例，填充它，然后将其分配给图表。
Instead, it seems like you are probably trying to set the elements of an existing data container and not clearing it out correctly.
相反，您似乎正在尝试设置现有数据容器的元素，但没有正确清除它。
回答by John M
A comment for others who may come across this:
对可能遇到此问题的其他人的评论：
To clear out the chart series, titles, and legends:
清除图表系列、标题和图例：
//clear chart
Chart1.Series.Clear();
Chart1.Titles.Clear();
Chart1.Legends.Clear();
//create chart
