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2010-05-26T15:31:53Z

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==Create the FileInfo class from the file selected in the OpenFileDialog==

<source lang="csharp">using System;
using System.Windows.Forms;
using System.IO;
class MainClass
{
public static void Main()
{
OpenFileDialog dlgOpen = new OpenFileDialog();
if (dlgOpen.ShowDialog() == DialogResult.OK)
{
FileInfo fi = new FileInfo(dlgOpen.FileName);
Console.WriteLine("Filename " + fi.FullName );
Console.WriteLine(" Created at " + fi.CreationTime );
Console.WriteLine(" Accessed at " + fi.LastAccessTime );
}
}
}</source>

==File.Exists==

<source lang="csharp">using System;
using System.IO;
static class MainClass
{
static void Main(string[] args)
{
Console.WriteLine(File.Exists("c:\\test.txt"));
}
}</source>
<pre class=codeResult>True</pre>

==File: GetCreationTime and GetLastAccessTime==

<source lang="csharp">using System;
using System.Windows.Forms;
using System.IO;
class MainClass
{
public static void Main()
{
OpenFileDialog dlgOpen = new OpenFileDialog();
if (dlgOpen.ShowDialog() == DialogResult.OK)
{
string s = dlgOpen.FileName;
Console.WriteLine("Filename " + s);
Console.WriteLine(" Created at " + File.GetCreationTime(s));
Console.WriteLine(" Accessed at " + File.GetLastAccessTime(s));
}
}
}</source>

==File.ReadAllLines==

<source lang="csharp">using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
class MainClass
{
static void Main(string[] args)
{
StreamWriter writer = new StreamWriter(@"c:\myfile.txt");
for (int i = 0; i < 3; i++)
{
writer.Write(i.ToString());
}
writer.Flush();
writer.Close();
foreach (string line in File.ReadAllLines(@"c:\myfile.txt"))
{
Console.WriteLine(line);
}
}
}</source>
<pre class=codeResult>012</pre>

==File.WriteAllLines==

<source lang="csharp">using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
class MainClass
{
static void Main(string[] args)
{
string[] lines = new string[10];
for (int i = 0; i < 10; i++)
{
lines[i] = String.Format( "This is line number {0}", i);
}
File.WriteAllLines(@"c:\test.txt", lines);
foreach (string line in File.ReadAllLines(@"c:\test.txt"))
{
Console.WriteLine(line);
}
}
}</source>

==Key Members of the System.IO Namespace==

<source lang="csharp">Nonabstract I/O Class Type Meaning
BinaryReader
BinaryWriter store and retrieve primitive data types (integers, Booleans, strings, and whatnot) as a binary value.
BufferedStream temporary storage for a stream of bytes that may be committed to storage.
Directory
DirectoryInfo used to manipulate a directory structure.
DriveInfo provides information for the drives.
File
FileInfo manipulate files.
FileStream for random file access.
FileSystemWatcher monitor the modification of a given external file.
MemoryStream random access to streamed data stored in memory.
Path performs operations on path information.
StreamWriter
StreamReader store and retrieve textual information to or from a file.
StringWriter
StringReader underlying storage is a string buffer rather than a physical file.</source>

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в 15:31, 26 мая 2010

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