C# 是什么导致此代码出现IndexOutfrange异常？

最近，我在一个特定的方法中得到了一个IndexOutfrange异常。此函数中的新代码读取“csv”文件（扩展名为“csv”的.txt文件）并对其进行解析；因此，它必须是特定于该异常的代码，否则会引发此异常的数据本身

但它显然不在数据库的Insert中，因为我在发生Insert的catch块中添加了一个MessageBox.Show（），但我从未看到它

public bool PopulatePlatypusItemsListAndInsertIntoPlatypusItemsTable(frmCentral fc)
{
    const int Platypus_ID_OFFSET = 0;
    const int Platypus_ITEM_ID_OFFSET = 1;
    const int ITEM_ID_OFFSET = 2;
    const int PACKSIZE_OFFSET = 3;

    bool ret = false;
    try
    {
        string dSQL;

        bool First = true;

        if (File.Exists(csvFilePathName))
        {
            int fzz = 0;

            dSQL = "DELETE FROM PlatypusItems";
            try
            {
                dbconn.DBCommand(dSQL, true);
            }
            catch
            {
                frmCentral.listboxMessage.TopIndex = frmCentral.listboxMessage.Items.Add(Convert.ToString(++frmCentral.lstMessageCount) +
                                                                                         ". Error processing PlatypusItem data from server");
            }

            SqlCeConnection conn = dbconn.GetConnection();
            if (conn != null && conn.State == ConnectionState.Closed)
            {
                conn.Open();
            }
            SqlCeCommand cmd = conn.CreateCommand();

            cmd.CommandText = "INSERT INTO PlatypusItems ( PlatypusID, PlatypusItemID, ItemID, PackSize) VALUES (?, ?, ?, ?)";

            if (!ret) 
            {
                ret = true;
            }

            PlatypusItem DuckbillItm = new PlatypusItem();
            string thisLine;
            string[] arrLine;
            using (StreamReader sr = new StreamReader(csvFilePathName)) 
            {
                while (sr.Peek() >= 0) 
                {
                    thisLine = sr.ReadLine();
                    arrLine = thisLine.Split(',');
                    DuckbillItm.PlatypusID = arrLine[Platypus_ID_OFFSET];
                    DuckbillItm.PlatypusItemID = arrLine[Platypus_ITEM_ID_OFFSET];
                    DuckbillItm.ItemID = arrLine[ITEM_ID_OFFSET];
                    DuckbillItm.PackSize = Convert.ToInt32(arrLine[PACKSIZE_OFFSET]);

                    PlatypusItemList.List.Add(DuckbillItm);

                    dSQL = "INSERT INTO PlatypusItems (PlatypusID, PlatypusItemID, ItemID, PackSize) VALUES (" + DuckbillItm.PlatypusID + ",'" +
                        DuckbillItm.PlatypusItemID + "','" + DuckbillItm.ItemID + "'," + DuckbillItm.PackSize + ")";

                    if (!First)
                    {
                        cmd.Parameters[0].Value = DuckbillItm.PlatypusID;
                        cmd.Parameters[1].Value = DuckbillItm.PlatypusItemID;
                        cmd.Parameters[2].Value = DuckbillItm.ItemID;
                        cmd.Parameters[3].Value = DuckbillItm.PackSize.ToString();
                    }

                    if (First)
                    {
                        cmd.Parameters.Add("@PlatypusID", DuckbillItm.PlatypusID);
                        cmd.Parameters.Add("@PlatypusItemID", DuckbillItm.PlatypusItemID);
                        cmd.Parameters.Add("@ItemID", DuckbillItm.ItemID);
                        cmd.Parameters.Add("@PackSize", DuckbillItm.PackSize);
                        cmd.Prepare();
                        First = false;
                    }

                    if (frmCentral.CancelFetchInvDataInProgress)
                    {
                        return false;
                    }

                    try
                    {
                        // testing with these reversed: - either way, get the IndexOutOfRange exception...
                        //dbconn.DBCommand(cmd, dSQL, true);
                        dbconn.DBCommand(cmd, cmd.CommandText, true); //<-- If this works as well or better, dSQL is only there for the progress updating code below
                        // the first line is the legacy code; the second seems more sensible to me; both seem to work
                    }
                    catch (Exception x)
                    {
                        MessageBox.Show(string.Format("dbcommand exc message = {0}; PlatypusID = {1}; PlatypusItemID = {2}; ItemID = {3}; PackSize = {4}",      

                    x.Message, DuckbillItm.PlatypusID, DuckbillItm.PlatypusItemID, DuckbillItm.ItemID, DuckbillItm.PackSize));//TODO: Remove
                        frmCentral.listboxMessage.TopIndex =
                            frmCentral.listboxMessage.Items.Add(Convert.ToString(++frmCentral.lstMessageCount) +
                            ". Error processing Platypus Item data from server");
                    }

                    fzz += dSQL.Length; //<-- tried commenting this weird code out, but still get IndexOutOfRangeException

                    if (fzz > fc.ProgressChangedIndex)
                    {
                        fc.ProgressChangedIndex = fzz + fc.ProgressChangedIncrement;
                        if (((frmCentral.ProgressBar.progressBar1.Maximum/4) + (fzz*3) < frmCentral.ProgressBar.progressBar1.Maximum) &&
                            ((frmCentral.ProgressBar.progressBar1.Maximum/4) + (fzz*3) > frmCentral.ProgressBar.progressBar1.Value))
                        {
                            frmCentral.ProgressBar.progressBar1.Value = (frmCentral.ProgressBar.progressBar1.Maximum/4) + (fzz*3);
                            frmCentral.ProgressBar.progressBar1.Refresh();
                        }
                    }
                }
            }
        }
    }
    catch (Exception ex)
    {
        duckbilledPlatypiRUs.ExceptionHandler(ex, "PlatypusItemFile.PopulatePlatypusItemsListAndInsertIntoPlatypusItemsTable");
    }
    return ret;
}

…我从来没有见过那些MessageBox.Show（）s，所以我想不是这三个字符串值造成了问题；可能是int（PackSize）。PackSize永远不会大于Int32允许的值；在.NET 1.1中是否有一个等价的TryParse（）

更新2 我确实看到了异常中的“IndexOutfrange”，但从来没有看到MessageBox.Show（）s：

更新3

---

毕竟，这是糟糕的数据；有些行中有四个逗号，而不是预期的三个。因此，我只是删除了这些行（在添加代码以检查数组的每个元素的大小之后，并在此之前对它们进行了修剪），并且运行良好。

我最初的猜测：如果您的输入.csv文件不正确，可能是

arrLine[…]

行中的一行（例如

DuckbillItm.PlatypusID=arrLine[Platypus\u ID\u OFFSET]

）会导致这种情况。执行调试构建并将断点放在catch处理程序上，然后告诉我们什么是“ex.StackTrace”说明。

您没有单步执行以查看它发生的确切位置？您是否尝试检查所有命令参数的值以确保它们符合预期？@DonBoitnott:无法单步执行-这是一个Windows CE应用程序，我无法使用模拟器。我必须使用VS2003和.NET1.1等，这是一个痛苦；这是一种轻描淡写的说法。我依赖MessageBox.Show（）来调试状态。@Andrew:我想我必须这样做；但这将意味着无数次地点击OK按钮，然后用谷歌的眼睛看着这些值弹出。我只看到两个发生索引的地方。首先，阅读CSV。。。如果您得到一行少于4个项目（定义为用逗号分隔），那么您将要求多于数组中存在的项目。第二，命令参数……它们在哪里实例化？真的有4个吗？如果你想要更多的信息，把它放在评论里…这不是答案。

catch (Exception ex)
{
    if (ex.Message.IndexOf("IndexOutOfRange") < 0)
    {
        duckbilledPlatypiRUs.ExceptionHandler(ex, "PlatypusItemFile.PopulatePlatypusItemsListAndInsertIntoPlatypusItemsTable"); 
    }
}

if (arrLine[PLATYPUS_ID_OFFSET].Length > 10) //TODO: Remove?
            {
                                MessageBox.Show(string.Format("PLATYPUS_ID_OFFSET length should be 10; was {0}", arrLine[PLATYPUS_ID_OFFSET].Length));
                                arrLine[PLATYPUS_ID_OFFSET] = arrLine[PLATYPUS_ID_OFFSET].Substring(0, 10);
                            }
                            if (arrLine[PLATYPUS_ITEM_ID_OFFSET].Length > 19)
                            {
                                MessageBox.Show(string.Format("PLATYPUS_ITEM_ID_OFFSET length should be 19; was {0}", arrLine[PLATYPUS_ID_OFFSET].Length));
                                arrLine[PLATYPUS_ITEM_ID_OFFSET] = arrLine[PLATYPUS_ITEM_ID_OFFSET].Substring(0, 19);
                            }
                            if (arrLine[ITEM_ID_OFFSET].Length > 19)
                            {
                                MessageBox.Show(string.Format("ITEM_ID_OFFSET length should be 19; was {0}", arrLine[PLATYPUS_ID_OFFSET].Length));
                                arrLine[ITEM_ID_OFFSET] = arrLine[ITEM_ID_OFFSET].Substring(0, 19);
                            }

try
{
    thisLine = sr.ReadLine();
    arrLine = thisLine.Split(',');
    if (arrLine[PLATYPUS_ID_OFFSET].Length > 10) //TODO: Remove?
    {
        MessageBox.Show(string.Format("PLATYPUS_ID_OFFSET length should be 10; was {0}", arrLine[PLATYPUS_ID_OFFSET].Length));
        arrLine[PLATYPUS_ID_OFFSET] = arrLine[PLATYPUS_ID_OFFSET].Substring(0, 10);
    }
    . . .
    DuckbillItm.PLATYPUSID = arrLine[PLATYPUS_ID_OFFSET];
    DuckbillItm.PLATYPUSItemID = arrLine[PLATYPUS_ITEM_ID_OFFSET];
    DuckbillItm.ItemID = arrLine[ITEM_ID_OFFSET];
    DuckbillItm.PackSize = Convert.ToInt32(arrLine[PACKSIZE_OFFSET]);
}
catch (Exception exc)
{
    MessageBox.Show(exc.Message);
}