未處理的異常 「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 

前端模塊

這是所創建的完整代碼IVE。這一切工作正常，但是，輸出3條細節線後，它與

上來型「System.IndexOutOfRangeException」未處理的異常發生在My_Name.InvReportFurniture.exe

其他信息：索引之外數組的邊界。

，並指定語句

QuantityOHDecimal = CurrentRecord（3）

爲源

我似乎無法找出它的原因是什麼。如果我在每個細節行寫入之間留下暫停，它會以與第三個細節行之後拋出異常相同的方式發生。

這是數據文件。

ET010,3抽屜結束表，169.00，10
ET020,4抽屜結束表，299.95，05
ET030,8抽屜結束表，148.99，12
ST010，堆疊臺325.50，20
BC020,4保質書櫃，130.99，24
BC030,5保質書櫃，199.95，08
BC040,6保質書櫃，270.99，15
LC010，休閒椅，198.89，20
VC010，助攻邊衛主席，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，冊立，235.80，05
LS010，燈架，135.23，15
PS010，手機座，99.95，19
TS010，電視架，270.90，08
SS010，立體聲立場，675.00，15
TS015，蒂芙尼支架，1115.35，02

Answer 1

這是因爲ST010的行缺少逗號字段分隔符。此行中只有三個字段，因此字段索引3（第四個字段）不存在。