Tips on Slash and back slash

The two are easy to remember. In fact, the English version is better to remember. The forward is called a slash, and the backward is called a backslash.

 

In windbg, the value of a filter member of directorysearcher is as follows:

0: 014>! Do RDX

Unable to enumerate managed locals, hresult 0x80004001

Unable to enumerate managed locals, hresult 0x80004001

Name: system. String

Methodtable: 000007fef91a7c6

Eeclass: 000007fef8dae530

Size: 414 (0x19e) bytes

GC generation: 0

(C: \ WINDOWS \ Assembly \ gac_64 \ mscorlib \ 2.0.0.0 _ b77a5c561934e089 \ mscorlib. dll)

String: (& (objectsid = \ 01 \ 05 \ 00 \ 00 \ 00 \ 00 \ 00 \ 05 \ 15 \ 00 \ 00 \ EE \ 94 \ 83 \ 48 \ 54 \ 46 \ C0 \ 31 \ 27 \ dB \ 8f \ 4f \ C4 \ 73 \ 04 \ 00 ))

Fields:

MT field offset type vt attr Value Name

000007fef91aee88 4000096 8 system. int32 1 instance 195 m_arraylength

000007fef91aee88 4000097 C system. int32 1 instance 99 m_stringlength

000007fef91a9660 4000098 10 system. Char 1 instance 28 m_firstchar

000007fef91a7c6 4000099 20 system. String 0 shared static empty

> Domain: Value 0000000000131320: 00000000ff490370 0000000002709600: 00000000ff490370 <

000007fef91a9510 400009a 28 system. Char [] 0 shared static whitespacechars

> Domain: Value 0000000000131320: 00000000ff490ac0 0000000002709600: 000000019f4955f0 <

 

Write section C #CodeWhen we use this value to query users in AD, we find that the slash here encountered a problem during compilation.

I tried to add a @ symbol before the string, but it was useless. I still cannot compile it.

Convert all the backslashes into double backslashes. This value is correct, as shown below:

.

Verify

 

Here we use some knowledge of escape characters in C #.

C # defines the following character escape sequences:

• \ '-single quote, needed for character literals
• \ "-double quote, needed for string literals
• \\-backslash
• \ 0 -Unicode Character 0
• \ A -Alert (character 7)
• \ B -backspace (character 8)
• \ F -form feed (character 12)
• \ n -New Line (character 10)
• \ r -carriage return (character 13)
• \ t -horizontal tab (character 9)
• \ v -vertical quote (character 11)
• \ uxxxx -Unicode escape sequence for character with hex value XXXX
• \ XN [N] [N] [N] -Unicode escape sequence for character with hex value NNNN (variable length version of \ uxxxx)
• \ uxxxxxxxx -Unicode escape sequence for character with hex value XXXXXXXX (for generating surrogates)

Of these,\,\ F,\ V,\ XAnd\ UAre rarely used in my experience.

[Author: Jon Skeet]

 

@ Symbol

The string prefixed with @ is called verbatim string. For example:

The path format is considered ugly and embarrassing.

String Path = "C :\\ Program Files \ Microsoft Visual Studio 10.0 \\";

A more convenient version is to use verbatim string

String Path = @ "C: \ Program Files \ Microsoft Visual Studio 10.0 \";

Verbatim string (@"... ") considers the content as pure content and does not need to escape any characters. however, a character must be escaped even in verbatim string, that is, the embedded double quotation marks ("), which must be escaped (""). example:

String xml = @ "<? XML version = "" 1.0 ""?> <DATA>... <DATA> ";

Reference

============================

What character escape sequences are available?

Http://blogs.msdn.com/ B /csharpfaq/archive/2004/03/12/what-character-escape-sequences-are-available.aspx

Escape sequences

Http://msdn.microsoft.com/en-us/library/h21280bw.aspx

Escaping in C #: characters, strings, string formats, keywords, identifiers

Http://www.codeproject.com/Articles/371232/Escaping-in-Csharp-characters-strings-string-forma