小编use*_*629的帖子

我的目标是这样做:将文件中的数据读入数组,加载列表框,计算每个学生的平均值并确定字母等级,并计算课程平均值:

我声明的变量(全局):

昏暗项目,midterm,hw1,hw2,final,count,average As Integer

Dim letterGrade, lastName, firstName As String
Dim classAverage As Double

我的代码:

Dim array1 As String()= New String(6){}

    Dim streamreader1 As StreamReader = File.OpenText("grades.csv")
    count = 0
    classAverage = 0
    Do While (streamreader1.Peek() <> -1)
        array1 = Strings.Split(streamreader1.ReadLine(), ",", -1)
        firstName(count) = array1(0)
        lastName(count) = array1(1)
        lstNames.Items.Add(lastName(count) & ", " & firstName(count))
        hw1(count) = Convert.ToString(array1(2))
        hw2(count) = Convert.ToString(array1(3))
        project(count) = Convert.ToString(array1(4))
        midterm(count) = Convert.ToString(array1(5))
        final(count) = Convert.ToString(array1(6))
        average(count) = Math.Round(Math.Truncate((((((hw1(count) + hw2(count)) + (2 * project(count))) …