System.IO.IOException问题，请教高手

[jane35_2009]

要实现的功能：点击一个按钮的click事件，弹出一个“打开文件对话框”，选择好文件之后，显示再显示一个保存文件对话框。每次运行到下列程序的最后那行就会出错，出错信息如下：
未处理的“System.IO.IOException”类型的异常出现在 mscorlib.dll 中。

其他信息: The process cannot access the file 'F:\Backup\My Documents\5252.hex' because it is being used by another process.
望高手指点！非常感谢！

FileStream ^fStream;
StreamReader ^sReader;
Stream ^myStream;

OpenFileDialog^ openFileDialog1 = gcnew OpenFileDialog;

//Set the parameters for the open file dialog box
openFileDialog1->Filter = "TXT files (*.txt)|*.txt|All files (*.*)|*.*";
openFileDialog1->FilterIndex = 1;
openFileDialog1->RestoreDirectory = true;

//Open the dialog
openFileDialog1->ShowDialog();

//if they pressed OK and a file was selected
myStream = openFileDialog1->OpenFile();

//Try to open the file to read
fStream = gcnew FileStream(openFileDialog1->FileName, FileMode::Create, FileAccess::Write,FileShare::None);

sReader = gcnew StreamReader(fStream);
FileStream ^fStream2;
StreamWriter^ sWriter;
Stream^ myStream2;


SaveFileDialog^ saveFileDialog1 = gcnew SaveFileDialog;


saveFileDialog1->Filter = "Hex files (*.hex)|*.hex|All files (*.*)|*.*";
saveFileDialog1->FilterIndex = 1;

saveFileDialog1->AddExtension = "hex";


saveFileDialog1->ShowDialog() ;
myStream2 = saveFileDialog1->OpenFile();

//Try to open the file to write
fStream2 = gcnew FileStream(saveFileDialog1->FileName,FileMode::Create, FileAccess::ReadWrite,FileShare::ReadWrite);

[healer_kx]

好，不会。

[珍惜生命远离CPP]

The process cannot access the file 'F:\Backup\My Documents\5252.hex' because it is being used by another proces
这不是很明显了么
你需要用try catch 来捕获这个异常

[jane35_2009]

我用了try，catch的
我这里给出的代码，是简化过的。
我在一个临时文件里测试了一下，fStream2 = gcnew FileStream(path,FileMode::Create, FileAccess::ReadWrite,FileShare::ReadWrite);
这个函数的用法是对的，但是，把saveFileDialog1->FileName作为参数放进去就不对了。唉郁闷
高手继续指点啊！

[向立天]

你用的是CLI

[jane35_2009]

感谢大家的回答。
问题已经解决。
错误出在下面两句话：
myStream = openFileDialog1->OpenFile();
fStream = gcnew FileStream(openFileDialog1->FileName, FileMode::Create, FileAccess::Write,FileShare::None);
第一句话已经打开了一个文件，第二句话还打算创建这个文件，当然会出错了。
这个问题让我搞了好几天！不过还是学到了东西。
再次谢谢各位。

[u010176611]

好 !!!!!!!!