爲什麼我會發生OutOfMemoryException？

我有這種方法，我從計時器滴答事件每X秒調用方法。在開始的幾秒鐘內沒有任何問題，但是在20秒後或者顯示異常。爲什麼我會發生OutOfMemoryException？

private void ReturnTexture(Texture texture_take, List<Point> lstPnt, float[] anglArr, float angle) 
     { 
      int i, j, bytes = 2048 * 512, stride = 2048; 
      GraphicsStream textureStream; 
      byte[] rgbValues = new byte[bytes]; 

      //sets texture to complete transparent 
      GCHandle gch = GCHandle.Alloc(rgbValues, GCHandleType.Pinned); 
      MemSet(gch.AddrOfPinnedObject(), 0x0, rgbValues.Length); 

      //add 90 degrees because the cone starts at 90 
      angle += 90F + 23.75F; 

      //checks all points and draws yellow only those how are inside the cone 
      if (lstPnt != null) 
      { 
       for (i = 0; i < lstPnt.Count - 1; i++) 
       { 
        if (anglArr[i] <= angle && anglArr[i] >= angle - 47.5F) //if point angle is inside cone. Cone angle is 47.5 degrees 
        { 
         j = lstPnt[i].Y * stride + lstPnt[i].X * 4; 

         //yellow 
         rgbValues[j + 0] = (byte)0; 
         rgbValues[j + 1] = (byte)255; 
         rgbValues[j + 2] = (byte)255; 
         rgbValues[j + 3] = (byte)255; 
        } 
        else 
        { 

        } 
       } 
      }

唯一的例外是上線：

byte[] rgbValues = new byte[bytes];

當異常發生，我看到變量字節包含：1048576 而rgbValues是空

我異常之前使用斷點發生並看到以字節爲單位的值是相同的：1048576但異常僅在20秒左右後才發生，而不僅僅是在開始時。

類型 '的System.OutOfMemoryException' 的未處理的異常發生在天氣Radar.exe

System.OutOfMemoryException was unhandled 
    HResult=-2147024882 
    Message=Exception of type 'System.OutOfMemoryException' was thrown. 
    Source=Weather Radar 
    StackTrace: 
     at Weather_Radar.Form1.ReturnTexture(Texture texture_take, List`1 lstPnt, Single[] anglArr, Single angle) in d:\C-Sharp\Weather Radar\Weather Radar\Weather Radar\Form1.cs:line 314 
     at Weather_Radar.Form1.timer1_Tick(Object sender, EventArgs e) in d:\C-Sharp\Weather Radar\Weather Radar\Weather Radar\Form1.cs:line 59 
     at System.Windows.Forms.Timer.OnTick(EventArgs e) 
     at System.Windows.Forms.Timer.TimerNativeWindow.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 Weather_Radar.Program.Main() in d:\C-Sharp\Weather Radar\Weather Radar\Weather Radar\Program.cs:line 19 
     at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args) 
     at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args) 
     at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() 
     at System.Threading.ThreadHelper.ThreadStart_Context(Object state) 
     at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) 
     at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) 
     at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) 
     at System.Threading.ThreadHelper.ThreadStart() 
    InnerException:

314線在Form1是：字節[] rgbValues =新的字節[字節];

form1中的第59行是：ReturnTexture（scannedCloudsTexture，cloudPoints，angleArray，angleF）;

這是計時器滴答事件代碼：

static float angle_ = 0.0F; 
     static float angleF = 0.0F; 
     private void timer1_Tick(object sender, EventArgs e) 
     { 
      if (angleF > 360F) 
      { 
       angleF -= 360F; 
      } 

      ReturnTexture(scannedCloudsTexture, cloudPoints, angleArray, angleF); 

      DisplayOnScreen(angle_); 

      angle_ += (float)(Math.PI * 1d/180d); 
      angleF += 1.0F; 
     }

來源

2014-09-30 James Aharon

的GCHandle免受垃圾收集器，所以你應該釋放內存使用調用GCHandle.Free方法，當手柄沒有更多必要 – InferOn 2014-09-30 07:20:19

我敢打賭，每個時鐘滴答您的RAM增加。嘗試重複使用您的數組，而不是在每次打勾時創建 – Reniuz 2014-09-30 07:21:27

正如Renuiz在評論解釋說，它看起來像你不釋放分配給你的形象記憶。當你撥打GCHandle.Alloc

一個新的GCHandle保護對象免受垃圾回收。當GCHandle不再需要時，必須使用Free發佈。

如果你不FreeGCHandle，你的代碼分配的1MB將永遠不會被釋放。我認爲有兩種可能的選擇：

如果可能，重新使用byte[]，不需要更多的內存。保留GCHandle，以便您可以將它們memset以使每個勾號歸零。
請勿使用GCHandle將byte[]固定在內存中。反正你創建一個新的byte[]all values will be set to zero。

來源

2014-09-30 07:29:44 Bas

爲什麼我會發生OutOfMemoryException？

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