There are two classes to manage directories, Directory and
DirectoryInfo.
Directory
The Directory class is responsible for creating, moving and
enumerating directories and subdirectories. All of its methods are static and
require a security check for each call. The security check verifies the
permission of the current user to perform the specified operation. The methods
of Directory class have been explained in the sections that follow.
CreateDirectory Method
CreateDirectory Method creates a directory if one does not
exist.
Listing 1
Directory.CreateDirectory(@"E:\TestDirectory");
Delete Method
Delete method deletes a directory.
Listing 2
Directory.Delete(@"E:\TestDirectory");
Exists Method
Exists Method determines the existence of a given directory.
Listing 3
Directory.CreateDirectory(@"E:\TestDirectory");
if(Directory.Exists(@"E:\TestDirectory"))
Response.Write("Directory Exist");
else
Response.Write("Directory does not exist");GetCreationTime Method
GetCreationTime Method displays the date and time of
creation of a given directory.
Listing 4
Response.Write(Directory.GetCreationTime(@"E:\TestDirectory"));
GetCurrentDirectory Method
GetCurrentDirectory Method returns the path of current
working directory of the application.
Listing 5
String cd=Directory.GetCurrentDirectory();
GetDirectories Method
GetDirectories Method returns a string array filled with the
fully qualified names of each contained directory of a given directory.
Listing 6
string[] abc=Directory.GetDirectories(Server.MapPath("Repository"));
foreach( string a in abc)
{
Response.Write(a);
Response.Write("<BR>");
}The GetDirectories Method is overloaded. We can pass the search
pattern as a string in the form of a second optional parameter, which will
return a string array filled with the fully qualified names of each contained
directory that matches the search pattern of a given directory.
Listing 7
string[] abc=Directory.GetDirectories(Server.MapPath("Repository"),"b*");
foreach( string a in abc)
{
Response.Write(a);
Response.Write("<BR>");
}In the above code listing all directories will be displayed starting
with the letter b.
GetDirectoryRoot Method
GetDirectoryRoot Method returns root information after
taking a path as an argument.
Listing 8
cd=Directory.GetDirectoryRoot(@"E:\TestDirectoryFile");
GetFiles Method
GetFiles Method returns a string array filled with the fully
qualified names of each contained file of a given directory.
Listing 9
string[] abc=Directory.GetFiles(Server.MapPath("Repository"));
foreach( string a in abc)
{
Response.Write(a);
Response.Write("<BR>");
}The GetFiles Method is overloaded. We can pass the search
pattern as a string in the form of a second optional parameter, which will
return a string array filled with the fully qualified names of each contained
file that matches the search pattern of a given directory.
Listing 10
string[] abc=Directory.GetFiles(Server.MapPath("Repository"),"*.aspx");
foreach( string a in abc)
{
Response.Write(a);
Response.Write("<BR>");
}In the above code listing all files having extension aspx
will be displayed.
GetFileSystemEntries Method
GetFileSystemEntries Method returns a string array filled
with the fully qualified names of each contained directory and file of a given
directory.
Listing 11
string[] abc=Directory.GetFileSystemEntries(Server.MapPath("Repository"));
foreach( string a in abc)
{
Response.Write(a);
Response.Write("<BR>");
}The GetFileSystemEntries Method is overloaded. We can pass the
search pattern as a string in the form of a second optional parameter, which
will return a string array filled with the fully qualified names of each
contained directory and file that matches the search pattern of a given
directory.
Listing 12
string[] abc=Directory.GetFileSystemEntries(Server.MapPath("Repository"), "b*");
foreach( string a in abc)
{
Response.Write(a);
Response.Write("<BR>");
}In the above code listing all files and directories will be
displayed starting with letter b.
GetLastAcessTime Method
GetLastAccessTime returns the last access date and time of
the file or directory as specified in the path.
Listing 13
string cd=Directory.GetLastAccessTime(@"E:\TestDirectoryFile").ToString();
GetLastWriteTime Method
GetLastWriteTime returns the last modified date and time of
the file or directory as specified in the path.
Listing 14
string cd=Directory.GetLastWriteTime(@"E:\TestDirectoryFile").ToString();
GetLogicalDrives Method
GetLogicalDrives Method returns a string array that contains
a list of the available drives.
Listing 15
string[] abc=Directory.GetLogicalDrives();
foreach( string a in abc)
{
Response.Write(a);
Response.Write("<BR>");
}GetParent Method
GetParent Method returns the parent directory of the
specified path.
Listing 16
string cd=Directory.GetParent("E:\\TestDirectoryFile").ToString();SetCreationTime Method
SetCreationTime Method sets the date and time of the file or
directory as specified in the path.
Listing 17
Directory.SetCreationTime("E:\\TestDirectoryFile1",System.DateTime.Now);SetCurrentDirectory Method
SetCurrentDirectory Method sets the application’s current
working directory to the directory as specified in the path.
Listing 18
Directory.SetCurrentDirectory(@"E:\TestDirectoryFile");
SetLastAccessTime Method
SetLastAccessTime Method sets the last access date and time
of the file or directory as specified in the path.
Listing 19
Directory.SetLastAccessTime("E:\\TestDirectoryFile",System.DateTime.Now);SetLastWriteTime Method
SetLastWriteTime Method sets the last written date and time
of the directory as specified in the path.
Listing 20
Directory.SetLastWriteTime(("E:\\TestDirectoryFile1",System.DateTime.Now); Move Method
Move Method moves a file or a directory and its contents to
a new location.
Listing 21
Directory.Move("E:\\TestDirectoryFile1","E:\\TestDirectoryFile2");DirectoryInfo
The DirectoryInfo class is similar to the Directory class,
but contains only static methods. A security check is performed only when the
instance is created. The methods of DirectoryInfo class have been explained in
the sections that follow.
Create Method
Create Method creates a directory.
Listing 22
DirectoryInfo di=new DirectoryInfo(@"E:\TestDirectoryFile");
di.Create();
CreateSubdirectory Method
CreateSubDirectory Method creates a subdirectory.
Listing 23
di.CreateSubdirectory(“TestSubDirectory”);
Delete Method
Delete Method deletes the directory. This method is
overloaded.
Listing 24
di.Delete(); // use when directory is empty;
di.Delete(true); // use to delete all files and directories
in the directory.
GetDirectories Method
GetDirectories Method returns the subdirectories of the
given directory.
Listing 25
DirectoryInfo df=new DirectoryInfo(Server.MapPath("Storage"));
DirectoryInfo[] abc=df.GetDirectories();
for(int i=0;i<abc.Length;i++)
{
Response.Write(abc[i]);
Response.Write("<BR>");
}GetDirectories Method is overloaded. We can pass the search
pattern as a string in the form of an optional parameter, which will return a directory
list containing the name of each directory that matches the search pattern.
Listing 26
DirectoryInfo df=new DirectoryInfo(Server.MapPath("Storage"));
DirectoryInfo[] abc=df.GetDirectories("D*");
for(int i=0;i<abc.Length;i++)
{
Response.Write(abc[i]);
Response.Write("<BR>");
}In the above code listing all directories will be displayed
starting with the letter D.
GetFiles Method
The GetFiles Method returns a file list from the current
directory.
Listing 27
DirectoryInfo df=new DirectoryInfo(Server.MapPath("Storage"));
FileInfo[] abc=df.GetFiles();
for(int i=0;i<abc.Length;i++)
{
Response.Write(abc[i]);
Response.Write("<BR>");
}The GetFiles Method is overloaded. We can pass the search
pattern as a string in form of an optional parameter, which will return a file
list containing the name of each file that matches the search pattern of a
given directory.
Listing 28
DirectoryInfo df=new DirectoryInfo(Server.MapPath("Storage"));
FileInfo[] abc=df.GetFiles("x*");
for(int i=0;i<abc.Length;i++)
{
Response.Write(abc[i]);
Response.Write("<BR>");
}In the above code listing all files will be displayed
starting with the letter x.
GetFileSystemInfos Method
GetFileSystemInfos Method gets a collection of all the
files and directories inside a folder.
Listing 29
DirectoryInfo di=new DirectoryInfo(@"E:\TestDirectoryFile");
FileSystemInfo[] abc=di.GetFileSystemInfos();
for(int i=0;i<abc.Length;i++)
{
Response.Write(abc[i]);
Response.Write("<BR>");
}The GetFileSystemInfos Method is overloaded. We can pass a search
pattern as a string in the form of an optional parameter, which will return the
directory and file list containing the name of each file and directory that
matches the search pattern.
Listing 30
DirectoryInfo di=new DirectoryInfo(@"E:\TestDirectoryFile ");
FileSystemInfo[] abc=di.GetFileSystemInfos("D*");
for(int i=0;i<abc.Length;i++)
{
Response.Write(abc[i]);
Response.Write("<BR>");
}In the above code listing all directories and files will be
displayed starting with the letter D.
MoveTo Method
MoveTo Method moves a DirectoryInfo instance and its
contents to a new path.
Listing 31
di.MoveTo(@"E:\TestDirectoryFile3");
