我工作的Visual Studio 2012,并使用C#,我使用的库DirectShowLib拍照从我的摄像头,但我只能拿一张照片,如果我尝试采取另一个我得到一个异常:
DirectShowLib.DsError.ThrowExceptionForHR(Int32 hr)
at SnapShot.Capture.SetupGraph(DsDevice dev, Int32 iWidth, Int32 iHeight, Int16 iBPP, Control hControl) in c:\Users\devel_000\Documents\Visual Studio 2012\Projects\ControlAcceso\ControlAcceso\Capture.cs:line 323
at SnapShot.Capture..ctor(Int32 iDeviceNum, Int32 iWidth, Int32 iHeight, Int16 iBPP, Control hControl) in c:\Users\devel_000\Documents\Visual Studio 2012\Projects\ControlAcceso\ControlAcceso\Capture.cs:line 86
at ControlAcceso.PhotoWindow..ctor() in c:\Users\devel_000\Documents\Visual Studio 2012\Projects\ControlAcceso\ControlAcceso\PhotoWindow.cs:line 32
at ControlAcceso.CheckWindow.pbPhoto_Click(Object sender, EventArgs e) in c:\Users\devel_000\Documents\Visual Studio 2012\Projects\ControlAcceso\ControlAcceso\CheckWindow.cs:line 108
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.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 ControlAcceso.Program.Main() in c:\Users\devel_000\Documents\Visual Studio 2012\Projects\ControlAcceso\ControlAcceso\Program.cs:line 18
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
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()
我使用的是DxSnap例如[链接]以拍摄照片。 该异常的方法中SetupGraph抛出[链接]
该生产线DirectShowLib.DsError.ThrowExceptionForHR(Int32 hr)
引起了我的注意,这是什么意思? 我怎样才能解决这个问题?