如何清除文本文件内容c# [英] how to clear text file content c#

问题描述

我想用这种方法清除文本文件

i want clear text file contet with this method

private void writeTextFile(string filePath, string text)
{
    if (!File.Exists(filePath))
    {
        File.Create(filePath).Close();

    }
    using (StreamWriter tw = new StreamWriter(filePath))
    {
        File.WriteAllText(filePath,"");
        tw.WriteLine(text);
        tw.Close();
    }
}

但我收到此错误

The process cannot access the file  because it is being used by another process.

但这不是在任何地方打开，

but this not open in anywhere ,

请帮帮我谢谢

推荐答案

那是因为您正在创建一个 StreamWriter，然后使用 File.WriteAllText.您的文件已被 StreamWriter 访问.

That's because you're creating a StreamWriter, then using File.WriteAllText. Your File is already being accessed with the StreamWriter.

File.WriteAllText 就是这样做的，将传递给它的整个字符串写入文件.如果您要使用 File.WriterAllText，则不需要 StreamWriter.

File.WriteAllText does just that, writes the entire string you pass to it to a file. StreamWriter is unnecessary if you're going to use File.WriterAllText.

如果您不关心覆盖现有文件，您可以这样做:

If you don't care about overwriting an existing file, you can do this:

private void writeTextFile(string filePath, string text)
{
    File.WriteAllText(filePath, text);
}

如果你想使用 StreamWriter(顺便说一下，File.WriteAllText 使用，它只是隐藏它)，并附加到文件，你可以这样做这个(来自这个答案):

If you want to use StreamWriter (which, by the way, File.WriteAllText uses, it just hides it), and append to the file, you can do this (from this answer):

using(StreamWriter sw = File.AppendText(path))
{
    tw.WriteLine(text);
}

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