Csharp/CSharp Tutorial/File Directory Stream/File Access Mode — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
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Версия 18:31, 26 мая 2010
Содержание
- 1 Create FileStream from FileInfo with file mode, file access and file sharing
- 2 Creates a file with read-write access that allows others to read
- 3 FileStream is opened for FileAccess.ReadWrite (default) and FileShare.None (default)
- 4 FileStream is opened for FileAccess.ReadWrite FileShare.Read and has had its entire contents truncated (due to FileMode.Truncate)
- 5 FileStream is opened for FileAccess.Write FileShare.None (default) and is positioned at the end (because of FileMode.Append)
- 6 Use FileStream with StreamWriter to provide a greater degree of control in how you open the file
Create FileStream from FileInfo with file mode, file access and file sharing
<source lang="csharp">using System; using System.IO; public class MainClass {
static void Main(string[] args) { FileInfo MyFiles = new FileInfo(@"c:\Testing.txt"); FileStream MyFileStream1 = MyFiles.Open(FileMode.Append, FileAccess.Read, FileShare.None); int MyBytes = MyFileStream1.ReadByte(); MyFileStream1.Close(); }
}</source>
Creates a file with read-write access that allows others to read
<source lang="csharp">using System; using System.IO; public class MainClass {
static void Main(string[] args) { FileStream MyFileStream1 = new FileStream(@"c:\Testing.txt", FileMode.Create); int MyBytes = MyFileStream1.ReadByte(); MyFileStream1.Close(); }
}</source>
<source lang="csharp">using System; using System.Collections.Generic; using System.Collections.Specialized; using System.IO; using System.IO.rupression; using System.Net; using System.Net.Mail; using System.Net.Sockets; using System.Runtime.InteropServices; using System.Text; public class MainClass {
public static void Main() { using (FileStream fs1 = File.Open("c:\\test.txt", FileMode.Open)){ } }
}</source>
<source lang="csharp">using System; using System.Collections.Generic; using System.Collections.Specialized; using System.IO; using System.IO.rupression; using System.Net; using System.Net.Mail; using System.Net.Sockets; using System.Runtime.InteropServices; using System.Text; public class MainClass {
public static void Main() { using (FileStream fs3 =File.Open("c:\\test.txt", FileMode.Truncate, FileAccess.ReadWrite, FileShare.Read)) { } }
}</source>
<source lang="csharp">using System; using System.Collections.Generic; using System.Collections.Specialized; using System.IO; using System.IO.rupression; using System.Net; using System.Net.Mail; using System.Net.Sockets; using System.Runtime.InteropServices; using System.Text; public class MainClass {
public static void Main() { using (FileStream fs2 = File.Open("c:\\test.txt", FileMode.Append, FileAccess.Write)) { } }
}</source>
Use FileStream with StreamWriter to provide a greater degree of control in how you open the file
<source lang="csharp">using System; using System.IO; public class MainClass {
static void Main(string[] args) { FileStream MyFileStream = new FileStream(@"c:\Testing.txt", FileMode.CreateNew, FileAccess.Write, FileShare.None); StreamWriter MyStreamWriter = new StreamWriter(MyFileStream); MyStreamWriter.Write("a string"); MyFileStream.Close(); MyStreamWriter.Close(); }
}</source>