StreamWriter.Write不写入文件;没有异常抛出

My code in C# (asp.net MVC)

我在C＃中的代码（asp.net MVC）

StreamWriter tw = new StreamWriter("C:\\mycode\\myapp\\logs\\log.txt");

// write a line of text to the file
tw.Write("test");

The file is created but is empty. No exception is thrown. I have never seen this before and I am stuck here; I just need to write some debugging output.

文件已创建但为空。没有例外。我以前从未见过这个，我被困在这里;我只需要编写一些调试输出。

Please advise.

请指教。

8 个解决方案

#1

Use

使用

System.IO.File.WriteAllText(@"path\te.txt", "text");

#2

StreamWriter is buffered by default, meaning it won't output until it receives a Flush() or Close() call.

StreamWriter默认是缓冲的，这意味着它在收到Flush（）或Close（）调用之前不会输出。

You can change that by setting the AutoFlush property, if you want to. Otherwise, just do:

如果需要，可以通过设置AutoFlush属性来更改它。否则，只需：

StreamWriter tw = new StreamWriter("C:\\mycode\\myapp\\logs\\log.txt");

// write a line of text to the file
tw.Write("test");
tw.Close();  //or tw.Flush();

#3

Neither flushed nor closed nor disposed. try this

既不冲洗也不封闭也不处置。尝试这个

using (StreamWriter tw = new StreamWriter(@"C:\mycode\myapp\logs\log.txt"))
{
    // write a line of text to the file
    tw.Write("test");
    tw.Flush();
}

or my preference

或者我的偏好

using (FileStream fs = new FileStream( @"C:\mycode\myapp\logs\log.txt"
                                     , FileMode.OpenOrCreate
                                     , FileAccess.ReadWrite)           )
{
    StreamWriter tw = new StreamWriter(fs);
    tw.Write("test");
    tw.Flush();
}

#4

You need to either close or flush the StreamWriter after finishing writing.

完成写入后，您需要关闭或刷新StreamWriter。

tw.Close();

要么

tw.Flush();

But the best practice is to wrap the output code in a using statement, since StreamWriter implements IDisposable:

但最好的做法是将输出代码包装在using语句中，因为StreamWriter实现了IDisposable：

using (StreamWriter tw = new StreamWriter("C:\\mycode\\myapp\\logs\\log.txt")){
// write a line of text to the file
tw.Write("test");
}

#5

        FileStream fs = new FileStream("d:\\demo.txt", FileMode.CreateNew,                FileAccess.Write);
        StreamWriter sw = new StreamWriter(fs, System.Text.Encoding.ASCII);
        int data;

            sw.Write("HelloWorld");

        sw.Close();
        fs.Close();

The problem is when StreamWriter Object is created with reference of FileStream Object , SW object will be always expecting some data till SW object is Closed.
问题是当StreamWriter对象是在引用FileStream对象的情况下创建的，SW对象总是会期待一些数据直到SW对象被关闭。
So After using sw.Close(); Your Opened File will get closed and get ready for showing Output.
所以在使用sw.Close（）之后;您的已打开文件将关闭并准备好显示输出。

#6

Ya in VB.net this was not needed but it seems with CSharp you need a Writer.Flush call to force the write. Of course Writer.Close() would force the flush as well.

雅虎在VB.net中这不是必需的，但在CSharp看来，你需要一个Writer.Flush调用来强制写入。当然，Writer.Close（）也会强制刷新。

We can also set the AutoFlush Property of the StreamWriter instance:

我们还可以设置StreamWriter实例的AutoFlush属性：

sw.AutoFlush = true;
// Gets or sets a value indicating whether the StreamWriter 
// will flush its buffer to the underlying stream after every  
// call to StreamWriter.Write.

From: http://msdn.microsoft.com/en-us/library/system.io.streamwriter.autoflush(v=vs.110).aspx

来自：http：//msdn.microsoft.com/en-us/library/system.io.streamwriter.autoflush(v=vs.110).aspx

#7

an alternative

替代

FileStream mystream = new FileStream("C:\\mycode\\myapp\\logs\\log.txt",    
FileMode.OpenOrCreate, FileAccess.Write);           
StreamWriter tw = new StreamWriter(mystream); 
tw.WriteLine("test");
tw.close();

#8

Try to close the file or add \n to the line such as

尝试关闭文件或将\ n添加到行等

tw.WriteLine("test");
tw.Close();

#1

Use

使用

System.IO.File.WriteAllText(@"path\te.txt", "text");

#2