为什么StreamWriter不写入我的.txt文件？ [英] Why doesn't StreamWriter write to my .txt file?

问题描述

您好。我从来没有要求任何东西，这很简单。

但我无法以某种方式使它工作。

Hello. I never asked for anything, and this is pretty simple.
But I can't get it working somehow.

private void keyPress(object sender, KeyPressEventArgs e)
        {
            StreamWriter sw = new StreamWriter(@"C:\Users\Public\Documents\Test.txt");
            switch (e.KeyChar)
            {
                case 'a':
                    sw.Write("a");
                    sw.Flush();
                    return;
            }
        }

我打赌有人知道如何让sw写入我的.txt我按下'a'键。



谢谢，XauS。

I bet someone knows how to get the sw to write into my .txt when ever i press the key 'a'.

Thanks, XauS.

推荐答案

我的朋友。因为Stream是一次性的。你必须在操作它们后关闭它们。

这段代码对我有效：

Hi my friend. Because Stream is disposable. you must Close them after manipulate them.
this code works for me correctly:

switch (e.KeyChar)
            {
                case'a':
                    stream.Write(e.KeyChar);
                    stream.Close();
                    break;
            }

另一个重要的事情是在这里使用return。为什么？告诉我。

之后你必须使用休息。

祝你好运。

another important thing is using return here. why? tell me.
after case you must use break.
good luck.

试试这个代码，

Try this code,

private void keyPress(object sender, KeyPressEventArgs e)
        {
            try
            {

            StreamWriter sw = new StreamWriter
                           (@"C:\Users\Public\Documents\Test.txt");
            switch (e.KeyChar)
            {
                case 'a':
                    { // you haven't put this braces
                    sw.Write("a");
                    sw.Flush();
                    sw.close();
                    };
                    break; //you put return
            }
            }
           catch(Exception e)
           {
              //catch statements
           }
        }

使用此代码将文本写入文本文件



private void keyPress（object sender，KeyPressEventArgs e）

{

// StreamWriter sw = new StreamWriter（@" D： \ Test.txt"）;

开关（e.KeyChar）

{

案例'a'：

File.AppendAllText（@" C：\Users\Public\Documents\Test.txt"，" a"）;



return ;

}

}

use this code to write text into text file

private void keyPress(object sender, KeyPressEventArgs e)
{
//StreamWriter sw = new StreamWriter(@"D:\Test.txt");
switch (e.KeyChar)
{
case 'a':
File.AppendAllText(@"C:\Users\Public\Documents\Test.txt", "a");

return;
}
}

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