强制的StreamWriter改变编码 [英] Forcing StreamWriter to change Encoding

问题描述

我想保存使用文件的DialogResult 和的StringBuilder 。使文字后，我打电话下面的代码保存文件：

I am trying to save a file using DialogResult and StringBuilder. After making the text, I am calling the following code to save the file:

    if (dr == DialogResult.OK)
    {

        StreamWriter sw = new StreamWriter(saveFileDialog1.FileName);

        sw.Write(sb.ToString());
        sw.Close();
    }

我想第二个参数添加到的StreamWriter 为 Encoding.UTF8 但由于第一个参数是字符串而非流，它并没有对其进行编译。

I tried to add the second parameter to StreamWriter as Encoding.UTF8 but since the first argument is a string rather than a Stream, it does not compile it.

我怎么能说字符串转换为流能够通过第二个参数作为编码？

How can I convert that string to a stream to be able to pass the second parameter as Encoding?

这样做的原因是，地方在我的文字我有μ但是当文件保存它显示了像μ所以μ越来越起子！

The reason for this, is that somewhere in my text I have µ but when the file is saved it shows like μ so the µ is getting screwd!

感谢

推荐答案

只是把它包在的FileStream 。

StreamWriter sw = new StreamWriter(
    new FileStream(saveFileDialog1.FileName, FileMode.Open, FileAccess.ReadWrite),
    Encoding.UTF8
);

如果您想追加，使用 FileMode.Append 代替。

If you want to append, use FileMode.Append instead.

您也应该调用的Dispose（）在尝试/终于块，或使用使用块处置的对象，当它超过了使用范围

You should also call Dispose() on a try/finally block, or use a using block to dispose the object when it exceeds the using scope:

using(
    var sw = new StreamWriter(
        new FileStream(saveFileDialog1.FileName, FileMode.Open, FileAccess.ReadWrite),
        Encoding.UTF8
    )
)
{
    sw.Write(sb.ToString());
}

这会正常关闭和处理所有异常路径的数据流。

This will properly close and dispose the streams across all exception paths.

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