Question

 private void button4_Click(object sender, EventArgs e)
    {
        double sum = 0.3;
        double sum1 = 0.4;
        double sum2 = 0;
        for (int i = 0; i <= dataGridView1.Rows.Count - 1; i++)
        {
            sum = sum * int.Parse(dataGridView1.Rows[i].Cells[4].Value.ToString());
            sum = sum * int.Parse(dataGridView1.Rows[i].Cells[5].Value.ToString());
            sum1 = sum1 * int.Parse(dataGridView1.Rows[i].Cells[6].Value.ToString());
            sum2 = sum1 + sum2;
        }

        textBox8.Text = sum2.ToString();
    }

我想计算一个包含3个标记元素的加权总和的聚合标记。课程1为30％，课程2为30％，期末考试为40％。我们还需要它来将其除以数组中对象的数量。有没有人可以帮助我解决我的代码？

Answer 1

如果是我，我可以创建一个班级来代表一个学生，并为它Name和每个考试分数提供一个属性。然后，我将添加一个属性，该属性根据百分比给出计算出的总得分。

接下来，我们可以根据您的Student中的数据填充这些DataGridView对象的列表，然后可以很容易地显示汇总和类平均值。

例如，Student类可能类似于：

public class Student
{
    public string Name { get; set; }
    public int Course1Score { get; set; }
    public int Course2Score { get; set; }
    public int FinalExamScore { get; set; }
    public double AggregateScore => Course1Score * .3 + Course2Score * .3 +
                                    FinalExamScore * .4;
}

然后我们可以填充它们的列表并输出结果：

private void button4_Click(object sender, EventArgs e)
{
    var students = new List<Student>();

    for (int i = 0; i <= dataGridView1.Rows.Count - 1; i++)
    {
        students.Add(new Student
        {
            Name = $"student{i + 1}",
            Course1Score = int.Parse(dataGridView1.Rows[i].Cells[4].Value.ToString()),
            Course2Score = int.Parse(dataGridView1.Rows[i].Cells[5].Value.ToString()),
            FinalExamScore = int.Parse(dataGridView1.Rows[i].Cells[6].Value.ToString()),
        });
    }

    string results = string.Join(Environment.NewLine,
        students.Select(s => $"{s.Name} had an aggregate score of {s.AggregateScore}"));

    results += "\n\nThe average aggregated score is: " +
                students.Average(student => student.AggregateScore);

    MessageBox.Show(results);
}

来自datagridview中3列的汇总数量

1 个答案: