奇怪的 IndexOutOfRangeException，即使捕获时也是如此

Question

好吧，我有一个公共静态常量：

public static ChatLine[] chatLine = new ChatLine[numChatLines];

。

调试向我显示了这段代码（稍后在同一个文件中）：

for (int num12 = 0; num12 < numChatLines; num12++)
{
    chatLine[num12] = new ChatLine();
}

将鼠标悬停在每个数据点上时，它向我显示 num12 是 0，而 chatLine 是 chatLine[0]。这很奇怪，因为我的公共常量正如我上面向您展示的那样......知道为什么会发生这种情况吗？

。 。

完整的堆栈跟踪如下：

System.IndexOutOfRangeException was unhandled
  Message=Index was outside the bounds of the array.
  Source=Project1
  StackTrace:
       at Project1.Main.Initialize() in C:\Users\X\My Documents\Project1\Main.cs:line 7590
       at Microsoft.Xna.Framework.Game.RunGame(Boolean useBlockingRun)
       at Microsoft.Xna.Framework.Game.Run()
       at Project1.Program.Main(String[] args) in C:\Users\X\My Documents\Project1\Program.cs:line 14
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.AppDomain.nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.Runtime.Hosting.ManifestRunner.Run(Boolean checkAptModel)
       at System.Runtime.Hosting.ManifestRunner.ExecuteAsAssembly()
       at System.Runtime.Hosting.ApplicationActivator.CreateInstance(ActivationContext activationContext, String[] activationCustomData)
       at System.Runtime.Hosting.ApplicationActivator.CreateInstance(ActivationContext activationContext)
       at System.Activator.CreateInstance(ActivationContext activationContext)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssemblyDebugInZone()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: 

Answer 1

由于 chatLine 的长度为零，因此在创建数组时 numChatLines 也为零。您应该在设置numChatLines后创建数组。

Answer 2

这可能是因为 numChatLines 在

public static ChatLine[] chatLine = new ChatLine[numChatLines];

.. 初始化之后被赋予了一个值，这将给出一个 0 值。

尝试：

public static ChatLine[] chatLine;
void main()
{
  /* ... your code ... */
  numChatLines = 12;
  chatLine = new ChatLine[numChatLines];
}