由于"System.IndexOutOfRangeException"而导致的数组头痛 [英] Array Headaches due to 'System.IndexOutOfRangeException'

问题描述

我正在尝试编写一个用于d20样式字符创建的压模程序...主要是看是否可以，但是我不断遇到以下错误:

WindowsApplication1.exe中出现类型为"System.IndexOutOfRangeException"的第一次机会异常

以下是与所讨论的数组相关的直接关联的代码块:

I am trying to write a die rolling program for d20 style character creation... Mostly just to see if I can, but I keep getting the following error:

A first chance exception of type ''System.IndexOutOfRangeException'' occurred in WindowsApplication1.exe

Here are the immediately associated blocks of code related to the array in question:

Dim strTemp(5) As Integer, sti As Integer 'initialize the array

和

and

For sti = 0 To dieNum
    temproll = GetNext()
    If reNum > 0 And temproll <= reNum Then temproll = Reroll()
    strTemp(sti) = temproll
    strRoll = strRoll + temproll
Next

令人费解的是，有6个这样的块重复此过程，并且显然涉及2个单独的函数，但是代码中特别突出显示的部分是strTemp(sti) = temproll行.当sti出错时sti的值为6，但是dieNum的最大可能数为5.即使当它为1或2时，我仍然遇到相同的错误.谁能告诉我我在哪里搞砸?顺便说一句，如果需要更多代码，我会很乐意.

经过一番审查后，问题显然在于未设置dieNum.之前未提及的代码dieNum = Asc(cboNum.Text)似乎是罪魁祸首.关于如何将组合框的数字内容转换为整数的任何想法?我以为我有这个权利.

It is wort noting that there are 6 such blocks repeating this process, and obviously 2 seperate functions involved, but the part of the code that specifically gets highlighted is the strTemp(sti) = temproll line. The value of sti is 6 when it errors, but the max possible number for dieNum is 5. Even when it is 1 or 2 I still get the same error. Can anyone tell me where I am screwing up? BTW if more code is needed, I will gladly oblige.

after some review apparently the problem is that dieNum is not being set. The not before mentioned code dieNum = Asc(cboNum.Text) seems to be the culprit. Any ideas on how to cast the numeric contents of a combobox to an integer? I thought I had this right.

推荐答案

如果dieNum为5，则循环肯定会抛出IndexOutOfRangeException:在这种情况下，范围是0到dieNum产生6个值，但strTemp仅包含5个元素.

对于傻笑，请参见 http://en.wikipedia.org/wiki/Off-by-one_error [ ^ ] :-)

—SA

If dieNum is 5, the loop certainly will throw IndexOutOfRangeException: in this case the range 0 to dieNum yields 6 values, but strTemp contains only 5 elements.

For giggles, see http://en.wikipedia.org/wiki/Off-by-one_error[^] :-)

—SA

好吧，看来这是一个ID10T错误...对于其他可能有这种特殊屁的人，解决方案很简单. dieNum = Asc(cboNum.Text)应该是dieNum = Convert.ToInt32(cboNum.Text).使用转换时出现简单错误……干杯！

Okay, so it appears as if this was an ID10T error... For anyone else that may have this particular brain fart, the solution was simple. dieNum = Asc(cboNum.Text) should have been dieNum = Convert.ToInt32(cboNum.Text). Simple error in using conversions... Cheers!

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