我想知道如何根据行过滤器找到列的平均值?
private void monthlyGridView_Click(object sender, EventArgs e)
{
List<double> everyQuestion = new List<double>();
for (int i = 5; i < monthlyGridView.Columns.Count; i++)
{
eachQuestion.Clear();
for (int j = 0; j < monthlyGridView.Rows.Count - 2; j++)
{
//mReport is DataTable which return values
string value = mReport.Rows[j][i].ToString();
eachQuestion.Add(double.Parse(value));
}
string columnAverage = String.Format("{0:0.00}", eachQuestion.Average());
monthlyGridView.Rows[monthlyGridView.Rows.Count - 1].Cells[i].Value = columnAverage;
}
}
这段代码只给我平均值而不是基于过滤的平均值?