System.IO.FileInfo.Open 方法 (FileMode, FileAccess, FileShare)

System.IO.FileInfo.Open 方法 (FileMode, FileAccess, FileShare)例子

下面的示例演示了如何打开一个文件进行读取和写入操作，但不允许其他用户或进程访问。

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.

相关资源

FileInfo 类

Open 重载

System.IO 命名空间

文件和流 I/O

如何：从文件读取文本

如何：向文件写入文本

MSDN