如何在字符串中写反斜杠() ？

我想在 textbox中写一些类似于 C:\Users\UserName\Documents\Tasks的东西:

txtPath.Text = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments)+"\Tasks";

我得到了一个错误:

无法识别的逃逸序列。

如何在字符串中写反斜杠？

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最佳答案

The backslash ("\") character is a special escape character used to indicate other special characters such as new lines (\n), tabs (\t), or quotation marks (\").

If you want to include a backslash character itself, you need two backslashes or use the @ verbatim string: 

var s = "\\Tasks";
// or
var s = @"\Tasks";

Read the MSDN documentation/C# Specification which discusses the characters that are escaped using the backslash character and the use of the verbatim string literal.

Generally speaking, most C# .NET developers tend to favour using the @ verbatim strings when building file/folder paths since it saves them from having to write double backslashes all the time and they can directly copy/paste the path, so I would suggest that you get in the habit of doing the same.

That all said, in this case, I would actually recommend you use the Path.Combine utility method as in @lordkain's answer as then you don't need to worry about whether backslashes are already included in the paths and accidentally doubling-up the slashes or omitting them altogether when combining parts of paths.

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Just escape the "\" by using + "\\Tasks" or use a verbatim string like @"\Tasks"

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To escape the backslash, simply use 2 of them, like this: \\

If you need to escape other things, this may be helpful..

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txtPath.Text = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments)+"\\\Tasks";

Put a double backslash instead of a single backslash...

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There is a special function made for this Path.Combine()

var folder = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
var fullpath = path.Combine(folder,"Tasks");
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even though this post is quite old I tried something that worked for my case .

I wanted to create a string variable with the value below:

21541_12_1_13\":null

so my approach was like that:

  • build the string using verbatim

    string substring = @"21541_12_1_13\"":null";

  • and then remove the unwanted backslashes using Remove function

    string newsubstring = substring.Remove(13, 1);

Hope that helps. Cheers


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