如何使用 StreamWriter.WriteAsync 并捕获异常? [英] How to use StreamWriter.WriteAsync and catch exceptions?
本文介绍了如何使用 StreamWriter.WriteAsync 并捕获异常?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有简单的写文件功能.
I have simple function to write files.
public static void WriteFile(string filename, string text)
{
StreamWriter file = new StreamWriter(filename);
try
{
file.Write(text);
}
catch (System.UnauthorizedAccessException)
{
MessageBox.Show("You have no write permission in that folder.");
}
catch (System.Exception e)
{
MessageBox.Show(e.Message);
}
file.Close();
}
如何将我的代码转换为使用 StreamWriter.WriteAsync
和 try-catch?
How can I convert my code to use StreamWriter.WriteAsync
with try-catch?
推荐答案
async public static void WriteFile(string filename, string text)
{
StreamWriter file = null;
try
{
file = new StreamWriter(filename);
await file.WriteAsync(text);
}
catch (System.UnauthorizedAccessException)
{
MessageBox.Show("You have no write permission in that folder.");
}
catch (System.Exception e)
{
MessageBox.Show(e.Message);
}
finally
{
if (file != null) file.Close();
}
}
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