C# 4 and .NET 4

780 ❘ ChaPTer 29 mAnipulAtinG files And the reGistry
}
{
}
MessageBox.Show(ex.Message);
code download FileProperties.sln
Finally, when the Up button is clicked, DisplayFolderList() must also be called, except that this time
you need to obtain the path of the parent of the folder currently being displayed. This is done with the
FileInfo.DirectoryName property, which returns the parent folder path:
protected void OnUpButtonClick(object sender, EventArgs e)
{
try
{
string folderPath = new FileInfo(currentFolderPath).DirectoryName;
DisplayFolderList(folderPath);
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
}
}
code download FileProperties.sln
moVing, CoPying, and deleTing files
As mentioned, moving and deleting files or folders is done by the MoveTo() and Delete() methods of the
FileInfo and DirectoryInfo classes. The equivalent methods on the File and Directory classes are
Move() and Delete(). The FileInfo and File classes also implement the methods CopyTo() and Copy(),
respectively. However, no methods exist to copy complete folders — you need to do that by copying each file
in the folder.
Using all these methods is quite intuitive —
you can find detailed descriptions in the SDK
documentation. This section illustrates their
use for the particular cases of calling the static
Move(), Copy(), and Delete() methods on
the File class. To do this, you will build on the
previous FileProperties example and call
its iteration FilePropertiesAndMovement.
This example will have the extra feature that
whenever the properties of a file are displayed,
the application gives you the option of deleting
that file or moving or copying the file to another
location.
filePropertiesandmovement sample
Figure 29-4 shows the user interface of the new
sample application.
As you can see, FilePropertiesAndMovement is
similar in appearance to FileProperties, except
for the group of three buttons and a text box at
the bottom of the window. These controls are figure 29-4
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