Question

In the following code I get the error "stream was not writable":

class Class1
{
    private static void Main()
    {
        FileStream fs = new FileStream("C:\fFile.txt", 
                              FileMode.OpenOrCreate, 
                              FileAccess.ReadWrite, 
                              FileShare.ReadWrite);

        StreamReader r = new StreamReader(fs);
        string t = r.ReadLine();
        r.Close();
        Console.WriteLine(t);

        StreamWriter w = new StreamWriter(fs);
        w.WriteLine("string");
        w.Flush();
        w.Close();
        fs.Close();

    }
}

这一错误出现在<代码>上。页: 1

为什么如此?

Answer 1

页: 1

http://www.ohchr.org。

因此,你试图写字的行文是无效的,你需要重新打开溪流并重开档案。

Answer 2

r.Close();

你读了话后,你就存在问题。接近(接近)的方法接近下游。

Answer 3

你不得不重开档案,因为阅读已经结束:

FileStream fs = new FileStream("C:\test.txt", 
                        FileMode.OpenOrCreate, 
                        FileAccess.ReadWrite, 
                        FileShare.ReadWrite);
using (StreamReader r = new StreamReader(fs))
{
    string t = r.ReadLine();
    r.Close();
    Console.WriteLine(t);
}

fs = new FileStream("C:\test.txt", 
            FileMode.OpenOrCreate, 
            FileAccess.ReadWrite, 
            FileShare.ReadWrite);

using (StreamWriter w = new StreamWriter(fs))
{
    w.WriteLine("string");
    w.Flush();
    w.Close();
}
fs.Close();

Answer 4

Dont close the first StreamWriter, it will close the underlying stream. And use using statements as Oscar suggests.

using (FileStream fs = new FileStream("C:\temp\fFile.txt", FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite))
{
    StreamReader r = new StreamReader(fs);
    string t = r.ReadLine();

    Console.WriteLine(t);

    StreamWriter w = new StreamWriter(fs);
    w.WriteLine("string");
    w.Close();
    r.Close();
    fs.Close();
}

Answer 5

不要关闭PigReader。仅谈以下内容,并将奏效。

 r.Close();

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