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我有一个 trackBar 的 Scroll 事件：

private void trackBar1_Scroll(object sender, EventArgs e)
        {

                trackbarCounter++;
                if (manualDone == true)
                {
                    myTrackPanelss1.trackBar1.Minimum = 0;
                    myTrackPanelss1.trackBar1.Maximum = _fi.Length - 1;                    setpicture(myTrackPanelss1.trackBar1.Value);
                    this.pictureBox1.Refresh();
                }
                if (automaticDone == true)
                {
                    myTrackPanelss1.trackBar1.Minimum = 0;
                    myTrackPanelss1.trackBar1.Maximum = fiAutomatic.Length - 1;
                    long[] tt = list_of_histograms[myTrackPanelss1.trackBar1.Value];
                    long res = GetTopLumAmount(tt, 1000);
                    long max = GetHistogramMaximum(tt);
                    GetHistogramAverage(tt);
                    setpicture(myTrackPanelss1.trackBar1.Value);
                    this.pictureBox1.Refresh();

                                    }

        }

例外是在这一行：

long[] tt = list_of_histograms[myTrackPanelss1.trackBar1.Value];

在我单击 trackBar 并将其移动到右侧之后，在这种情况下，这次它一直到帧/轨道 40，然后在那里抛出异常。

例外：

指数超出范围。必须是非负数且小于集合的大小。参数名称：索引

现在 fiAutomatic 变量包含 2225 个索引，例如在索引 [0] 我看到：{000001.bmp} 在索引 [1] 我看到：{000002.bmp} 等等。

list_of_histograms 现在在每个索引中包含 40 个索引，我在其中有 256 个索引，例如在 index[0] 中我看到：{[long256]}，我在 index[0] 中看到 256 个数字。然后在 index[1] 中再次 {[long256]} 和另外 256 个数字，依此类推。

trackBar 值为 40。

但是为什么当我在 40 帧/图像之后将 trackBar 向右移动时会抛出这个异常？

这是完整的异常消息：

System.ArgumentOutOfRangeException was unhandled
  Message=Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
  Source=mscorlib
  ParamName=index
  StackTrace:
       at System.ThrowHelper.ThrowArgumentOutOfRangeException()
       at System.Collections.Generic.List`1.get_Item(Int32 index)
       at Extracting_Frames.Form1.trackBar1_Scroll(Object sender, EventArgs e) in D:\C-Sharp\Extracting_Frames\Extracting_Frames\Extracting_Frames\Form1.cs:line 1793
       at System.Windows.Forms.TrackBar.OnScroll(EventArgs e)
       at System.Windows.Forms.TrackBar.WndProc(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
       at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
       at System.Windows.Forms.UnsafeNativeMethods.SendMessage(HandleRef hWnd, Int32 msg, IntPtr wParam, IntPtr lParam)
       at System.Windows.Forms.Control.SendMessage(Int32 msg, IntPtr wparam, IntPtr lparam)
       at System.Windows.Forms.Control.ReflectMessageInternal(IntPtr hWnd, Message& m)
       at System.Windows.Forms.Control.WndProc(Message& m)
       at System.Windows.Forms.ScrollableControl.WmHScroll(Message& m)
       at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
       at System.Windows.Forms.UserControl.WndProc(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
       at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
       at System.Windows.Forms.UnsafeNativeMethods.CallWindowProc(IntPtr wndProc, IntPtr hWnd, Int32 msg, IntPtr wParam, IntPtr lParam)
       at System.Windows.Forms.NativeWindow.DefWndProc(Message& m)
       at System.Windows.Forms.Control.DefWndProc(Message& m)
       at System.Windows.Forms.Control.WndProc(Message& m)
       at System.Windows.Forms.TrackBar.WndProc(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
       at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
       at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
       at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.Run(Form mainForm)
       at Extracting_Frames.Program.Main() in D:\C-Sharp\Extracting_Frames\Extracting_Frames\Extracting_Frames\Program.cs:line 18
       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:
4

1 回答 1

1

list_of_histograms is a contain now 40 indexs in each index

这将是你的问题。请记住，当您声明某些内容时，它会从 0 开始对其进行索引。因此，40 个索引意味着它的最大值为 39。这样做list_of_histograms[40]会导致错误。

编辑：现在，当我重新标记它时，我注意到对您的问题的评论......

于 2012-10-31T15:50:42.293 回答