winforms 如何在C#中访问图表以添加数据点

gcuhipw9 于 2022-11-17 发布在 C#

关注(0)|答案(3)|浏览(162)

我正在尝试编写一个类来更新图表数据。我已经通过Windows窗体创建了图表，窗体已经自动生成了Form1.cs和Form1.Designer.cs中的代码
下面是我认为Form1.designer.cs中的相关部分：

private void InitializeComponent()
{
    System.Windows.Forms.DataVisualization.Charting.ChartArea chartArea1 = new System.Windows.Forms.DataVisualization.Charting.ChartArea();
    System.Windows.Forms.DataVisualization.Charting.Legend legend1 = new System.Windows.Forms.DataVisualization.Charting.Legend();
    System.Windows.Forms.DataVisualization.Charting.Series series1 = new System.Windows.Forms.DataVisualization.Charting.Series();
    System.Windows.Forms.DataVisualization.Charting.DataPoint dataPoint1 = new System.Windows.Forms.DataVisualization.Charting.DataPoint(0D, 2D);
    System.Windows.Forms.DataVisualization.Charting.DataPoint dataPoint2 = new System.Windows.Forms.DataVisualization.Charting.DataPoint(0D, 3D);
    System.Windows.Forms.DataVisualization.Charting.DataPoint dataPoint3 = new System.Windows.Forms.DataVisualization.Charting.DataPoint(0D, 2D);
    System.Windows.Forms.DataVisualization.Charting.DataPoint dataPoint4 = new System.Windows.Forms.DataVisualization.Charting.DataPoint(0D, 25D);
    System.Windows.Forms.DataVisualization.Charting.DataPoint dataPoint5 = new System.Windows.Forms.DataVisualization.Charting.DataPoint(0D, 2D);
    System.Windows.Forms.DataVisualization.Charting.DataPoint dataPoint6 = new System.Windows.Forms.DataVisualization.Charting.DataPoint(0D, 3D);
    System.Windows.Forms.DataVisualization.Charting.DataPoint dataPoint7 = new System.Windows.Forms.DataVisualization.Charting.DataPoint(0D, 0D);
    this.tableLayoutPanel1 = new System.Windows.Forms.TableLayoutPanel();
    this.chart1 = new System.Windows.Forms.DataVisualization.Charting.Chart();
    this.tableLayoutPanel1.SuspendLayout();
    ((System.ComponentModel.ISupportInitialize)(this.chart1)).BeginInit();
    this.SuspendLayout();

我编写了另一个名为UpdateGraph.cs的类，它有一个向图形添加额外点的方法

namespace DataLogger
{
    class UpdateGraph
    {
        public void addGraphPoints()
        {
            chart1.Series.Points.AddXY(0, 10);   
        }
    }
}

问题是我收到一个错误消息
当前上下文中不存在名称chart1
因此，如果有人能解释我如何访问图表来修改数据（或者我应该参考什么），我真的会很感激，因为我现在有点难住了。

winforms

来源：https://stackoverflow.com/questions/25060780/how-to-access-a-chart-to-add-a-data-point-in-c-sharp

3条答案

按热度按时间

5jdjgkvh1#

你可以试试这个：

using System.Windows.Forms.DataVisualization.Charting;

class UpdateGraph
{
    public Chart Chart1 { get; set; }

    public UpdateGRaph(Chart chart)
    {
        Chart1 = chart;
    }

    public void AddGraphPoints()
    {
        Chart1.Series.Points.AddXY(0, 10);

    }
}

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knpiaxh12#

Forms Designer将在InitializeComponent（）中创建一个本Map表-也许有一种方法可以阻止它，但我还没有找到它。诀窍是将图表从控件层次结构中取出。例如，我在Designer.cs中的图表被添加到grpStuff中：

this.grpStuff.Controls.Add(chrtStuff);

其名称也可以在Designer.cs中找到：

chrtStuff.Name = "chartName";

因此，在我的代码中，我通过以下方式找到图表：

chrt = (System.Windows.Forms.DataVisualization.Charting.Chart)grpStuff.Controls("chartName");

赞(0）回复(0）举报 2022-11-17

wtzytmuj3#

chart1.Series["Your series name"].Points.AddXY(0, 10);

赞(0）回复(0）举报 2022-11-17

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winforms 如何在C#中访问图表以添加数据点

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