SaveFileDialog 阻止可移动驱动器 [英] SaveFileDialog blocking removeable drive

问题描述

我使用 SaveFileDialog 让用户选择可移动驱动器上的目录和文件名.之后我创建了那个文件，写入它，然后再次关闭它.

I'm using a SaveFileDialog to let a user pick a directory and filename on a removeable drive. Afterwards I create that file, write to it, and close it again.

到那时文件本身没有被锁定(可编辑、可删除)，但我无法弹出驱动器，因为 Windows 声称它仍在使用中.我必须在弹出之前退出应用程序.

By then the file itself is not locked (editable, deleteable), but I can't eject the drive because windows claims it is still in use. I have to exit the application before an eject is possible.

顺便说一句，即使我只使用 SaveFileDialog 选择文件，驱动器也会被锁定.在对话框上点击取消"不会导致问题

Incidentally the drive gets locked even when I only pick the file with the SaveFileDialog. Hitting "Cancel" on the dialog doesn't cause the problem

SaveFileDialog dlg = new SaveFileDialog();
dlg.DefaultExt = ".csv";
dlg.InitialDirectory = mySettings.defaultPath;
dlg.Filter = "(CSV-Dateien) *.csv|";
dlg.FileName = exportDate.ToString("yyyy-MM-dd") + ".csv";

if (dlg.ShowDialog() != DialogResult.OK){
    // USB-Drive is ejectable
}else{
    // USB-Drive is locked
}

推荐答案

I found 2 Solutions:

I found 2 Solutions:

一旦用户单击保存"，对话框就会更改当前工作目录.阻止可移动驱动器的不是文件，而是程序本身.

The Dialog changes the current working directory once the user clicks "save". It's not the file that was blocking the removable drive, but the program itself .

所以你要么需要在完成后重新调整工作目录:

So you either need to readjust the working directory once you're done:

String oldDir = Directory.GetCurrentDirectory();
// ... do dialog...
Environment.CurrentDirectory = oldDir;

或者你只是在调用 ShowDialog() 之前配置文件对话框来恢复目录

or you simply configure the file dialog to restore the directory before calling ShowDialog()

dlg.RestoreDirectory = true;
dlg.ShowDialog()

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