未处理的异常 “System.IndexOutOfRangeException”

Question

Module Module1 

'input vars declarations 
Private DescriptionString As String 
Private StockNumberString As String 
Private WholesalePriceDecimal As Decimal 
Private QuantityOHDecimal As Decimal 

'CONSTANT VAR 
Private Const PROFIT_PERCENT_DECIMAL As Decimal = 0.25 

'calculated vars declarations 
Private InvValueDecimal As Decimal 'this is WholesalePrice * QOH 
Private PotentialProfit As Decimal 'this is InvValue * PROFIT_PERCENT 
Private PotentialIncome As Decimal 'this is InvValue + PotentialProfit 

'declares the record variable and associates file name 
Private CurrentRecord() 
Private FurnitureInventoryFile As New FileIO.TextFieldParser("FURNFILE.TXT") 

'Main module is Level 1 
Sub Main() 

    'L1 calls L2 

    Call Housekeeping() 

    Do While Not FurnitureInventoryFile.EndOfData 
     Call ProcessRecords() 
    Loop 

    Call EndOfJob() 

End Sub 

'L2 Housekeeping() calls L3 SetFileDelimiter() and L3 WriteHeadings() 
Private Sub Housekeeping() 

    Call SetFileDelimiter() 
    Call WriteHeadings() 

End Sub 

'L2 ProcessRecords() calls L3 ReadFile(), L3 DetailCalculations() and L3 WriteDetailLine() 
Private Sub ProcessRecords() 

    Call ReadFile() 
    Call DetailCalculations() 
    Call WriteDetailLine() 

End Sub 

'L2 EndOfJob() calls L3 SummaryOutput() and L3 CloseFile() 
Private Sub EndOfJob() 

    Call SummaryOutput() 
    Call CloseFile() 

End Sub 

'L3, Called by Housekeeping(), Assigns filetype as delimited and assigns the delimiter as a comma 
Private Sub SetFileDelimiter() 

    FurnitureInventoryFile.TextFieldType = FileIO.FieldType.Delimited 
    FurnitureInventoryFile.SetDelimiters(",") 

End Sub 

'L3, Called by Housekeeping(), Writes the report heading and column heading lines 
Private Sub WriteHeadings() 

    'Report Headings 
    Console.WriteLine(Space(17) & "Inventory Report for Quality Furniture Store") 
    Console.WriteLine(Space(28) & "Christian VanderHorst") 

    '2 Blank lines 
    Console.WriteLine() 
    Console.WriteLine() 

    'Column Headings 
    Console.WriteLine(Space(22) & "Stock" & Space(8) & "Wholesale" & Space(2) & "Inventory" & Space(2) & "Potential" & Space(3) & "Potential") 
    Console.WriteLine(Space(1) & "Description" & Space(10) & "Number" & Space(2) & "QOH" & Space(6) & "Price" & Space(6) & "Value" & Space(5) & "Profit" & Space(6) & "Income") 

End Sub 

'L3, Called by ProcessRecords(), Reads the file and parses the current record into its vars 
Private Sub ReadFile() 

    CurrentRecord = FurnitureInventoryFile.ReadFields() 'reads the record 

    StockNumberString = CurrentRecord(0) 
    DescriptionString = CurrentRecord(1) 
    WholesalePriceDecimal = CurrentRecord(2) 
    QuantityOHDecimal = CurrentRecord(3) 

End Sub 

'L3, Calculates InvValueDecimal, PotentialProfitDecimal and PotentialIncomeDecimal 
Private Sub DetailCalculations() 

    InvValueDecimal = WholesalePriceDecimal * QuantityOHDecimal 
    PotentialProfit = InvValueDecimal * PROFIT_PERCENT_DECIMAL 
    PotentialIncome = InvValueDecimal + PotentialProfit 

End Sub 

'L3, Writes the detail lines 
Private Sub WriteDetailLine() 

    Console.WriteLine(Space(1) & DescriptionString.PadRight(19) & 
         Space(2) & StockNumberString & 
         Space(4) & QuantityOHDecimal.ToString("N0").PadLeft(2) & 
         Space(3) & WholesalePriceDecimal.ToString("N").PadLeft(8) & 
         Space(2) & InvValueDecimal.ToString("N").PadLeft(9) & 
         Space(5) & PotentialProfit.ToString("N").PadLeft(5) & 
         Space(2) & PotentialIncome.ToString("C").PadLeft(10)) 

End Sub 

'L3, Writes the summary line and pauses program to wait for enter keystroke 
Private Sub SummaryOutput() 

    'Blank space to move the summary line down 
    Console.WriteLine() 
    Console.WriteLine() 

    'the summary line 
    Console.WriteLine(Space(24) & "End of Furniture Profit Report") 

    'prompt to tell the user how to close the report 
    Console.WriteLine() 
    Console.WriteLine() 
    Console.WriteLine("Press ENTER to close the report") 
    Console.ReadLine() 

End Sub 

'L3, Closes the input file 
Private Sub CloseFile() 

    FurnitureInventoryFile.Close() 

End Sub 

前端模块

这是所创建的完整代码IVE。这一切工作正常，但是，输出3条细节线后，它与

上来型“System.IndexOutOfRangeException”未处理的异常发生在My_Name.InvReportFurniture.exe

其他信息：索引之外数组的边界。

，并指定语句

QuantityOHDecimal = CurrentRecord（3）

为源

我似乎无法找出它的原因是什么。如果我在每个细节行写入之间留下暂停，它会以与第三个细节行之后抛出异常相同的方式发生。

这是数据文件。

ET010,3抽屉结束表，169.00，10
ET020,4抽屉结束表，299.95，05
ET030,8抽屉结束表，148.99，12
ST010，堆叠台325.50，20
BC020,4保质书柜，130.99，24
BC030,5保质书柜，199.95，08
BC040,6保质书柜，270.99，15
LC010，休闲椅，198.89，20
VC010，助攻边卫主席，320.55,05
LC011，手包躺椅，1050.00，02
FC010，面料躺椅，755.00，04
VC015，皮革躺椅，500.01，10
BS010，册立，235.80，05
LS010，灯架，135.23，15
PS010，手机座，99.95，19
TS010，电视架，270.90，08
SS010，立体声立场，675.00，15
TS015，蒂芙尼支架，1115.35，02

Answer 1

这是因为ST010的行缺少逗号字段分隔符。此行中只有三个字段，因此字段索引3（第四个字段）不存在。