如何使用 c# 创建图表
本文关键字:创建 何使用 | 更新日期: 2023-09-27 18:37:25
我需要从我拥有的 6 个组合框中获取的数据创建一个图表。
组合框中的数据是数字。一旦我在组合框中选择了所需的数字,我就会按下一个按钮,该按钮会根据这些值创建图表。
我的问题是我只能做一次。一旦我更改组合框中的值并再次单击按钮,我就会收到异常。
我知道每次按下按钮时都需要创建新图表的实例,但我不知道如何操作。
private void button1_Click(object sender, EventArgs e)
{
chart1.ChartAreas.Add("chart");
chart1.ChartAreas["chart"].AxisX.Minimum = 0;
chart1.ChartAreas["chart"].AxisX.Maximum = 20;
chart1.ChartAreas["chart"].AxisX.Interval = 1;
chart1.ChartAreas["chart"].AxisY.Minimum = 0;
chart1.ChartAreas["chart"].AxisY.Maximum = 100;
chart1.ChartAreas["chart"].AxisY.Interval = 5;
chart1.Series.Add("xxx");
chart1.Series.Add("yyy");
chart1.Series["xxx"].Color = Color.Black;
chart1.Series["yyy"].Color = Color.Red;
chart1.Series["xxx"].ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Line;
chart1.Series["yyy"].ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Line;
chart1.Series["xxx"].Points.AddXY(comboBox1.Text, comboBox4.Text);
chart1.Series["yyy"].Points.AddXY(comboBox1.Text, comboBox4.Text);
chart1.Series["xxx"].Points.AddXY(comboBox2.Text, comboBox5.Text);
chart1.Series["yyy"].Points.AddXY(comboBox1.Text, comboBox4.Text);
chart1.Series["xxx"].Points.AddXY(comboBox3.Text, comboBox6.Text);
chart1.Series["yyy"].Points.AddXY(comboBox1.Text, comboBox4.Text);
}
尝试将 chart1 设置为图表的新实例(我假设就是这样!
所以它会是这样的:
private void button1_Click(object sender, EventArgs e)
{
chart1 = new Chart();
chart1.ChartAreas.Add("chart");
chart1.ChartAreas["chart"].AxisX.Minimum = 0;
chart1.ChartAreas["chart"].AxisX.Maximum = 20;
chart1.ChartAreas["chart"].AxisX.Interval = 1;
chart1.ChartAreas["chart"].AxisY.Minimum = 0;
chart1.ChartAreas["chart"].AxisY.Maximum = 100;
chart1.ChartAreas["chart"].AxisY.Interval = 5;
chart1.Series.Add("xxx");
chart1.Series.Add("yyy");
chart1.Series["xxx"].Color = Color.Black;
chart1.Series["yyy"].Color = Color.Red;
chart1.Series["xxx"].ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Line;
chart1.Series["yyy"].ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Line;
chart1.Series["xxx"].Points.AddXY(comboBox1.Text, comboBox4.Text);
chart1.Series["yyy"].Points.AddXY(comboBox1.Text, comboBox4.Text);
chart1.Series["xxx"].Points.AddXY(comboBox2.Text, comboBox5.Text);
chart1.Series["yyy"].Points.AddXY(comboBox1.Text, comboBox4.Text);
chart1.Series["xxx"].Points.AddXY(comboBox3.Text, comboBox6.Text);
chart1.Series["yyy"].Points.AddXY(comboBox1.Text, comboBox4.Text);
}