C#中用于文件名验证的正则表达式 [英] Regular expressions in C# for file name validation

问题描述

什么是好的正则表达式，可以验证文本字符串以确保它是有效的Windows文件名?(又没有 \/:*?<> | 字符).

What is a good regular expression that can validate a text string to make sure it is a valid Windows filename? (AKA not have \/:*?"<>| characters).

我想像以下那样使用它:

I'd like to use it like the following:

// Return true if string is invalid.
if (Regex.IsMatch(szFileName, "<your regex string>"))
{
    // Tell user to reformat their filename.
}

推荐答案

正如已经回答的那样，GetInvalidFileNameChars应该为您做到这一点，并且您甚至不需要正则表达式的开销:

As answered already, GetInvalidFileNameChars should do it for you, and you don't even need the overhead of regular expressions:

if (proposedFilename.IndexOfAny(System.IO.Path.GetInvalidFileNameChars()) != -1)
{
  MessageBox.Show("The filename is invalid");
  return;
}

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