C＃在图表上添加到Y值 [英] C# Add to Y value on chart

问题描述

我正在尝试将列表添加到图表。此列表包含2和4。

I am trying to add a List to a chart. This list contains a 2 and a 4.

foreach (decimal D in numbers)
{
    barChart.Series[0].Points.AddXY(1, D);
}

它需要在X轴上将D添加到索引1。但是，这仅在X1输出4，而不是6。当它到达列表中的4时，它将覆盖那里的2，而不是添加到其中（使6）。如何使它增加而不是覆盖？

It needs to add D to index 1 on the X axis. However, this only outputs 4 rather than six at X1. When it gets to the 4 in the list, it overwrites the 2 that is there, rather than adding to it (making 6). How do I make it add rather than overwrite?

编辑：我显然没有提供足够的信息。我正在使用Windows窗体。我使用的图表位于Visual Studio 2015的数据部分。

I did not give enough information apparently. I am using Windows Forms. The chart I am using is in the Data section of Visual Studio 2015.

推荐答案

您误解了<$ c $的含义c> AddXY 方法。

它不会更改y-或任何值。

It doesn't change the y- or any values.

AddXY 意味着将一个新的 DataPoint 添加到 Points 集合中。

AddXY means that a new DataPoint is added to the Points collection.

在您的代码中，每个x值的 1 和两点的y值是 2 和 4 。为此，您可能会写：

In your code each will have an x-value of 1 and the y-values of the two points are 2 and 4. To do so you would write, maybe:

barChart.Series[0].Points[0].YValues[0] += D;

如果数字是小数，则需要转换为双精度数，这是所有数字的基数类型图表值：

If your numbers are decimals you will need to cast to double, which is the base number type for all Chart values:

barChart.Series[0].Points[0].YValues[0] += (double)D;

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