演示 CanWrite 属性使用的 C# 程序

FileStream 类用于在文件中执行读取和写入操作。它为同步和异步读写操作提供全面支持。此类提供不同类型的方法和属性， CanWrite属性就是其中之一。此属性用于检查给定流是否支持写入。如果流支持写入，则返回 true，否则返回 false。

句法：

public override bool CanWrite { get; }

返回：此属性的返回类型为布尔值。如果流支持写入，它将返回 true。或者，如果流以只读访问权限关闭或打开，它将返回 false。

方法：

1.创建两个文件指针——file1和file2

FileStream file1;
FileStream file2;

2.使用具有读取权限的 sravan.txt 和具有写入权限的 vignan.txt 获取文件 1

file1 = new FileStream("sravan.txt", FileMode.Open, FileAccess.Read);
file2 = new FileStream("vignan.txt", FileMode.Open, FileAccess.Write);

这里，Open 属性用于打开文件，Read 属性用于读取文件，Write 属性用于写入文件。

3.使用 CanWrite 属性检查两个文件是否可以读取

if (file1.CanWrite)
    Console.WriteLine("able to write");
else
    Console.WriteLine("not able to write");
if (file2.CanWrite)
    Console.WriteLine("able to write");
else
    Console.WriteLine("not able to write");

4.关闭两个文件

例子：

C#

// C# program to demonstrate the working of
// CanWrite property
using System;
using System.IO;
 
class GFG{
     
static void Main()
{
     
    // Declare two file pointers
    FileStream file1;
    FileStream file2;
     
    // Read files
    file1 = new FileStream("sravan.txt", FileMode.Open,
                                         FileAccess.Read);
                                          
    file2 = new FileStream("vignan.txt", FileMode.Open,
                                         FileAccess.Write);
                                          
    // Check file pointer 1 is able to write or not
    // Using CanWrite property
    if (file1.CanWrite)
        Console.WriteLine("able to write");
    else
        Console.WriteLine("not able to write");
         
    // Close first file pointer
    file1.Close();
     
    // Check file pointer 2 is able to write or not
    // Using CanWrite property
    if (file2.CanWrite)
        Console.WriteLine("able to write");
    else
        Console.WriteLine("not able to write");
         
    // Close second file pointer
    file2.Close();
}
}

输出：

not able to write
able to write