Inserting a \ (backslash) into a String?

Question

User1688746251 posted

Hi all,

 I am writing some code that takes to Strings and concatenates them together to form a string in the following format:

1    string strCode1 = "X345";
2    string strCode2 = "X678";
3    
4    //Attempt #1 Output: X345\\X678
5    string strFinalCode = strCode1 + "\" strCode2;
6    
7    
8    //Attempt #2 Output: X345\\X678
9    string strFinalCode = strCode1 + @"\" + strCode2;
10   
11   
12   //Attempt #3 Output: X345\\X678
13   char c = (char)92;
14   string strFinalCode = strCode1 + c + strCode2;
15   strFinalCode = strFinalCode.Replace(@"\\", @"\");

I have also tried using a StringBuilder with no success.

 Is this possible to write a \ in a a string ? [:S]

Regards,

 Seán

 

Answer 1

User1191518856 posted

To write a \ into a string you should do like this:

string strFinalCode = strCode1 + "\\" + strCode2;

  

Answer 2

User1191518856 posted

Note, the debugger will show the contents escaped, i.e. if there is one backslash then the debugger will show it as \\

But if you print the value then it should show as only one \

Answer 3

User1688746251 posted

This strFinalCode is being returned (of type string of course) from a method I wrote.
Which in turn is inserted into another string as part of a SQL command.

The string being returned is still in the wrong format i.e. two backslashes. e.g. x456\\x456


 Suggestions welcome.

Seán

Answer 4

User1485238302 posted

I tried this and it displays a single '\' instead of '\\'. 

string strCode1 = "X345";
string strCode2 = "X678";
string strFinalCode = strCode1 + "\\" + strCode2;
Console.Write(strFinalCode);
Console.Read();

 I have tried returning the value and shows the correct value. Can you post your final code?

Answer 5

User187056398 posted

As Johram pointed out, a single backslash is displayed as a double backslash in the debugger.

Both these methods work:

string strFinalCode = strCode1 + @"\" + strCode2;
string strFinalCode = strCode1 + "\\" + strCode2;

You can validate this by opening up a Debug/Windows/Memory window and type in strFinalCode for the address.

You will see something like this...note there is only one backslash (5c)

0x0158A45C  c4 d8 0f 79 0a 00 00 00 09 00 00 00 58 00 33 00 34 00 35 00 5c  ÄØ.y........X.3.4.5.\
0x0158A471  00 58 00 36 00 37 00 38 00 00 00 00 00 00 00 00 00 00 00 00 00  .X.6.7.8.............
0x0158A486  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  .....................

 

 

Answer 6

User47344791 posted

string strFinalCode = strCode1 + @"\" + strCode2;

 

string strFinalCode = strCode1 + "\\" + strCode2  

both gives the same output :X345\X678

but in debugger it shows "\\"
 

Answer 7

User1688746251 posted

I have validated that the string is being returned correctly.

However,
When I call the method in question it puts the double backslash back in.

 Here is some code continuing on from the above method I mentioned..

1    string SQL = @"INSERT INTO TABLEX (...., Code ,.....) VALUES (....., {CODE}, .....)";
2    SQL = SQL.Replace("{CODE}", @P.GetCode());
3    ClassToExecutoSQLStmt(@SQL);

My question now is, to eliminate this double-backslash should I use the @ everywhere the string 'Code' [x000\x000] is used?
As my SQL command still contains this double backslash even though I have verified that the return value is indeed a single backslash.

 

Answer 8

User242249085 posted

should I use the @ everywhere the string

 

That is a question of style. But makes no difference to the strings in memory.

When I call the method in question it puts the double backslash back in.

 

How are you checking? If in the debugger (as noted multiple times in this thread), it shows strings like that would be shown in code, so a single backslash is shown doubled, a newline is shown as "\n" etc..