输入字符串格式不正确错误消息：Visual Basic

Question

我在程序中遇到特定代码行的问题。代码 _intValue（intcount）= Convert.ToInt32（objReader.ReadLine（）） 的行给我一个错误，说明＆＃34;输入字符串不在格式正确＆＃34;我不知道为什么。任何人都可以帮我解决这个问题吗？这是代码：

Option Strict On
Public Class frmClassicCarShow
    Public Shared _intSIZE As Integer = 10
    Public Shared _strCarandyear(_intSIZE) As String
    Private _intValue(_intSIZE) As Integer



    Private Sub frmClassicCarShow_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load

    End Sub
    Private Sub btnCalculate_Click(sender As System.Object, e As System.EventArgs) Handles btnCalculate.Click
        Dim objReader As IO.StreamReader
        Dim intcount As Integer = 0
        Dim CarModel As String = ""
        Dim intCar As Integer = 0
        Dim intValue As Integer
        Dim _intPrice As Integer



        'verify the file exist
        If IO.File.Exists("C:\cars.txt") Then
            objReader = IO.File.OpenText("C:\cars.txt")
            ' read file line by line
            Do While objReader.Peek <> -1
                _strCarandyear(intcount) = objReader.ReadLine()
                _intValue(intcount) = Convert.ToInt32(objReader.ReadLine())
                intcount += 1
            Loop
            objReader.Close()

            'place word into array
            For Each CarModel In (_strCarandyear)
                lstCars.Items.Add(CarModel)
            Next
            'sums up the number of cars
            For Each _strName In _strCarandyear
                intCar += 1
            Next
            lblTotalCars.Text = intCar.ToString

            For Each _intPrice In _intValue
                intValue += _intPrice
            Next
            lblTotalValue.Text = intValue.ToString

            btnCalculate.Enabled = False

            lblTotalCars.Visible = True

            lblTotalValue.Visible = True

        Else
            MsgBox("The file ""cars.txt"" is not available. Put the file ""cars.txt"" located in the zip folder of this program onto your local disk drive and then restart the program", , "Error")
            Close()
        End If

 End Sub
End Class