blocks|key|721539|text|您可以使用以下命令轻松完成此操作|type|unstyled|depth|inlineStyleRanges|entityRanges|data|721540|File.AppendAllText("date.txt",+DateTime.Now.ToString());|code-block|syntax|javascript|721541|如果你需要换行|721542|File.AppendAllText("date.txt",+
+++++++++++++++++++DateTime.Now.ToString()+%2B+Environment.NewLine);|721543|无论如何，如果你需要你的代码，可以这样做：|721544|TextWriter+tw+=+new+StreamWriter("date.txt",+true);|721545|使用第二个参数通知追加到文件。|721546|检查here+StreamWriter语法。|offset|length|721547|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.io.streamwriter.aspx^0|0|0|0|0|0|0|0|2|4|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|14|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|15|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|16|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|17|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|18|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|19|8|@]|9|@$S|1A|T|1B|1|1C]]|A|$]]|$1|U|3|-4|5|6|7|1D|8|@]|9|@]|A|$]]]|V|$W|$5|X|Y|Z|A|$10|11]]]]

You could do it easily using

<pre><code>File.AppendAllText("date.txt", DateTime.Now.ToString());
</code></pre>

If you need newline

<pre><code>File.AppendAllText("date.txt", 
 DateTime.Now.ToString() + Environment.NewLine);
</code></pre>

Anyway if you need your code do this:

<pre><code>TextWriter tw = new StreamWriter("date.txt", true);
</code></pre>

with second parameter telling to append to file. 
Check <a href="http://msdn.microsoft.com/en-us/library/system.io.streamwriter.aspx">here</a> StreamWriter syntax.

blocks|key|505517|text|无新行：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|505518|File.AppendAllText("file.txt",+DateTime.Now.ToString());|code-block|syntax|javascript|505519|然后在OK之后获得新的一行：|505520|File.AppendAllText("file.txt",+string.Format("{0}{1}",+"OK",+Environment.NewLine));|505521|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

No new line:

<pre><code>File.AppendAllText("file.txt", DateTime.Now.ToString());
</code></pre>

and then to get a new line after OK:

<pre><code>File.AppendAllText("file.txt", string.Format("{0}{1}", "OK", Environment.NewLine));
</code></pre>

blocks|key|721659|text|为什么不通过一个方法调用来实现：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|721660|File.AppendAllLines("file.txt",+new[]+{+DateTime.Now.ToString()+});|code-block|syntax|javascript|721661|它将为您执行换行符，并允许您根据需要一次插入多行。|721662|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Why not do it with one method call:

<pre><code>File.AppendAllLines("file.txt", new[] { DateTime.Now.ToString() });
</code></pre>

which will do the newline for you, and allow you to insert multiple lines at once if you want.

blocks|key|505569|text|var+Line+=+textBox1.Text+%2B+","+%2B+textBox2.Text;

File.AppendAllText(@"C:\Documents\m2.txt",+Line+%2B+Environment.NewLine);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|505570|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>var Line = textBox1.Text + "," + textBox2.Text;

File.AppendAllText(@"C:\Documents\m2.txt", Line + Environment.NewLine);
</code></pre>

blocks|key|505621|text|尝试使用以下代码在Unity3D中创建内容并将内容写入文本文件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|505622|void+CreateLog()+{
++++++++string+timestamp+=+DateTime.Now.ToString("dd-mm-yyyy_hh-mm-ss");
++++++++PlayerPrefs.SetString("timestamp",+timestamp);
++++++++string+path+=+Application.persistentDataPath+%2B+"/"+%2B+"log_"+%2B+timestamp+%2B+".txt";
++++++++//+This+text+is+added+only+once+to+the+file.
++++++++if+(!File.Exists(path))+{
++++++++++++//+Create+a+file+to+write+to.
++++++++++++using+(StreamWriter+sw+=+File.CreateText(path))
++++++++++++{
++++++++++++++++sw.WriteLine(DateTime.Now.ToString()+%2B+":+"+%2B+"App+initialised");
++++++++++++}+++
++++++++}+else+{
++++++++++++//+This+text+is+always+added,+making+the+file+longer+over+time
++++++++++++//+if+it+is+not+deleted.
++++++++++++using+(StreamWriter+sw+=+File.AppendText(path))+{
++++++++++++++++sw.WriteLine(DateTime.Now.ToString()+%2B+":+"+%2B+"App+initialised");
++++++++++++}+++
++++++++}

++++++++//+Open+the+file+to+read+from.
++++++++using+(StreamReader+sr+=+File.OpenText(path))+{
++++++++++++string+line+=+"";
++++++++++++while+((line+=+sr.ReadLine())+!=+null)
++++++++++++{
++++++++++++++++Debug.Log(line);
++++++++++++}
++++++++}
}|code-block|syntax|javascript|505623|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Try the following code to create and write content to a text file in Unity3D.
<pre><code>void CreateLog() {
 string timestamp = DateTime.Now.ToString(&quot;dd-mm-yyyy_hh-mm-ss&quot;);
 PlayerPrefs.SetString(&quot;timestamp&quot;, timestamp);
 string path = Application.persistentDataPath + &quot;/&quot; + &quot;log_&quot; + timestamp + &quot;.txt&quot;;
 // This text is added only once to the file.
 if (!File.Exists(path)) {
 // Create a file to write to.
 using (StreamWriter sw = File.CreateText(path))
 {
 sw.WriteLine(DateTime.Now.ToString() + &quot;: &quot; + &quot;App initialised&quot;);
 } 
 } else {
 // This text is always added, making the file longer over time
 // if it is not deleted.
 using (StreamWriter sw = File.AppendText(path)) {
 sw.WriteLine(DateTime.Now.ToString() + &quot;: &quot; + &quot;App initialised&quot;);
 } 
 }

 // Open the file to read from.
 using (StreamReader sr = File.OpenText(path)) {
 string line = &quot;&quot;;
 while ((line = sr.ReadLine()) != null)
 {
 Debug.Log(line);
 }
 }
}
</code></pre>

I'd like to add new line with text to my date.txt file, but instead of adding it into existing date.txt, app is creating new date.txt file..

<pre><code>TextWriter tw = new StreamWriter("date.txt");

// write a line of text to the file
tw.WriteLine(DateTime.Now);

// close the stream
tw.Close();
</code></pre>

I'd like to open txt file, add some text, close it, and later after clicking something: open date.txt, add text, and close it again.

So i can get: 

Button pressed: txt opened -> added current time, then close it. Another button pressed, txt opened -> added text "OK", or "NOT OK" in the same line, then close it again.

So my txt file will look like that:

<pre><code>2011-11-24 10:00:00 OK
2011-11-25 11:00:00 NOT OK
</code></pre>

How can i do this? Thanks!

How to add new line into txt file

我想在我的date.txt文件中添加新的带有文本的行，但是app没有将其添加到现有的date.txt中，而是创建了新的date.txt文件。TextWriter tw = new StreamWriter("date.txt");// write a line of text to the filetw.WriteLi...

问如何在txt文件中添加新行
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