我如何从dataGridView获得平均时间

Question

我有一个dataGridView，我有列时间 我需要在这个dataGridView中获得所有时间的平均值 这是我的代码，以获得平均值，但它不起作用

 public void avghold()
    {

        double[] AVG_HLOD = new double[dataGridView1.Rows.Count];
        AVG_HLOD = (from DataGridViewRow row in dataGridView1.Rows
                    where row.Cells["Avg_Hold"].FormattedValue.ToString()
                       != string.Empty
                    select Convert.ToDouble(row.Cells["Avg_Hold"].FormattedValue)).ToArray();
        double Avghold = AVG_HLOD.Average();
       label17.Text = AVG_HLOD.Average().ToS
    }

and this the image from the column

单击运行时显示此错误 Please click here

谢谢大家，

Answer 1

试试这个。

double avg = yourDataGridView.Rows.Cast<DataGridViewRow>()
    .AsEnumerable()
    .Average(x => int.Parse(x.Cells["Avg_Hold"].Value.ToString()));