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StreamReader 读取文件时出现乱码的解决方案 - MayGodBlessYou
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<h1>StreamReader 读取文件时出现乱码的解决方案</h1>
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<span class="date">2014/08/12</span>
<span>posted in </span>
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<p>今天在做一个打开文件对话框OpenFileDialog时，需要对打开的文件进行读取，显示在在窗体中的RichTextBox中。但是在显示文件时，却发现显示的中文字符串出现乱码。</p>
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<p>代码的关键部分如下所示：</p>
<pre><code class="language-plain_text"> 1 StreamReader sr = new StreamReader(openFileDialog.OpenFile());
2 string str = sr.ReadToEnd();
3 childForm.richTextBox1.Text = str;
</code></pre>
<p>开始我也想到了是字符编码出了问题，于是我在初始化StreamReader时，给它加了字符编码参数，加了好几次，Encoding.Unicode，Encoding.UTF32，Encoding.UTF7，Encoding.UTF8，Encoding.ASCII，这些能加的编码方案我都试过了，结果都不行，还是会乱码。百般无奈之下，我只好在.net爱好者群里问了。然后群里就有好心人给我发了一个链接，点进去看了之后恍然大悟。链接如下所示：<a href="http://www.cnblogs.com/wmw1989/archive/2008/05/19/1202500.html" title="http://www.cnblogs.com/wmw1989/archive/2008/05/19/1202500.html">http://www.cnblogs.com/wmw1989/archive/2008/05/19/1202500.html</a></p>
<p>原来，中文编码是GB2312，而当前系统的代码页的编码方案采用的是ANSI编码，出现乱码也就不足为奇了。解决方案很简单，就是初始化StreamReader的时候告诉它目前代码页的编码方案。可是由于Encoding类并没有定义ANSI编码方案，所以只能采用Default让系统获取当前操作系统的当前ANSI代码页的编码方案。因此上面的代码换成如下的代码就解决了：</p>
<pre><code class="language-plain_text"> 1 StreamReader sr = new StreamReader(openFileDialog.OpenFile(), Encoding.Default);
2 string str = sr.ReadToEnd();
3 childForm.richTextBox1.Text = str;
</code></pre>
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