本文整理汇总了C#中System.IO.FileInfo.Open方法的典型用法代码示例。如果您正苦于以下问题：C# FileInfo.Open方法的具体用法？C# FileInfo.Open怎么用？C# FileInfo.Open使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.IO.FileInfo的用法示例。
在下文中一共展示了FileInfo.Open方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: Main
//引入命名空间
using System;
using System.IO;
using System.Text;
class Test
{
public static void Main()
{
string path = @"c:\MyTest.txt";
FileInfo fi = new FileInfo(path);
// Delete the file if it exists.
if (!fi.Exists)
{
//Create the file.
using (FileStream fs = fi.Create())
{
Byte[] info = new UTF8Encoding(true).GetBytes("This is some text in the file.");
//Add some information to the file.
fs.Write(info, 0, info.Length);
}
}
//Open the stream and read it back.
using (FileStream fs = fi.Open(FileMode.Open))
{
byte[] b = new byte[1024];
UTF8Encoding temp = new UTF8Encoding(true);
while (fs.Read(b,0,b.Length) > 0)
{
Console.WriteLine(temp.GetString(b));
}
}
}
}
//This code produces output similar to the following;
//results may vary based on the computer/file structure/etc.:
//
//This is some text in the file.
//
//
//
//
//
//
//
//
//
//
//
//示例2: Main
//引入命名空间
using System;
using System.IO;
using System.Text;
class Test
{
public static void Main()
{
string path = @"c:\MyTest.txt";
FileInfo fi = new FileInfo(path);
// Delete the file if it exists.
if (!fi.Exists)
{
//Create the file.
using (FileStream fs = fi.Create())
{
Byte[] info = new UTF8Encoding(true).GetBytes("This is some text in the file.");
//Add some information to the file.
fs.Write(info, 0, info.Length);
}
}
//Open the stream and read it back.
using (FileStream fs = fi.Open(FileMode.Open, FileAccess.Read))
{
byte[] b = new byte[1024];
UTF8Encoding temp = new UTF8Encoding(true);
while (fs.Read(b,0,b.Length) > 0)
{
Console.WriteLine(temp.GetString(b));
}
try
{
//Try to write to the file.
fs.Write(b,0,b.Length);
}
catch (Exception e)
{
Console.WriteLine("Writing was disallowed, as expected: {0}",
e.ToString());
}
}
}
}
//This code produces output similar to the following;
//results may vary based on the computer/file structure/etc.:
//
//This is some text in the file.
//
//
//
//
//
//
//
//
//
//
//
//
//Writing was disallowed, as expected: System.NotSupportedException: Stream does
//not support writing.
// at System.IO.__Error.WriteNotSupported()
// at System.IO.FileStream.Write(Byte[] array, Int32 offset, Int32 count)
// at Test.Main() in C:\Documents and Settings\My Computer\My Documents\
//Visual Studio 2005\Projects\finfo open2\finfo open2\Program.cs:line 39示例3: Main
//引入命名空间
using System;
using System.IO;
public class OpenTest
{
public static void Main()
{
// Open an existing file, or create a new one.
FileInfo fi = new FileInfo("temp.txt");
// Open the file just specified such that no one else can use it.
FileStream fs = fi.Open( FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.None );
// Create another reference to the same file.
FileInfo nextfi = new FileInfo("temp.txt");
try
{
// Try opening the same file, which was locked by the previous process.
nextfi.Open( FileMode.OpenOrCreate, FileAccess.Read );
Console.WriteLine("The file was not locked, and was opened by a second process.");
}
catch (IOException)
{
Console.WriteLine("The file could not be opened because it was locked by another process.");
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
// Close the file so it can be deleted.
fs.Close();
}
}
//This code produces output similar to the following;
//results may vary based on the computer/file structure/etc.:
//
//The file could not be opened because it was locked by another process.示例4: Main
//引入命名空间
using System;
using System.IO;
class FileFileInfoApp
{
static void Main(string[] args)
{
FileInfo f = new FileInfo("Bar.txt");
FileStream fs = f.Create();
StreamWriter w = new StreamWriter(fs);
w.Write("Hello World");
w.Close();
fs = f.Open(FileMode.Open, FileAccess.Read, FileShare.None);
StreamReader r = new StreamReader(fs);
string t;
while ((t = r.ReadLine()) != null){
Console.WriteLine(t);
}
w.Close();
fs.Close();
f.Delete();
}
}