I want to print something like : Welcome "Aditya"
I tried using escape character
string s = "Welcome \"Aditya\"";
But it is printing as : Welcome \"Aditya\"
I have even tried to just print backslash(\) using string s = "\\" but instead I got \\.
Can anyone help me understand why escape character is not working or if I am doing anything wrong here?
I'm guessing you're looking at the Watch window in Visual Studio:
The Watch window adds its own quotes, and puts backslashes before any quotes in the string. This is probably confusing you.
You can click the magnifying glass next to the string in the watch window to see its actual value:
Alternatively, put ,nq (for "no quotes") after the variable name:
A full list of Debugger Format specifiers is here.
If you're just hovering over the variable name, you can also click the magnifying glass to see the string's actual value:
Just use string literal:
string s = #"Welcome ""Aditya""";
Related
I have created a search function within a media player that uses a list-box to output the data and when a user clicks a song I want that song to play. However, when I select a song for some reason I get two black slashes instead of one. Please help. I've tried replacing them already.
string path = #"C:\Users\Username\Music\";
path = path.Replace(#"\\", #"\");
string selectedsong, filetoplay;
selectedsong = listBox1.SelectedItem.ToString();
filetoplay = path + selectedsong + ".mp3";
Form1.wplayer.URL = filetoplay;
What I'm currently getting at the moment is C:\\Users\\Username\\Music\\Song.mp3 and as a result the song won't play
That Replace in your code is doing nothing because there are no double backslashes in your string... As others have already pointed out, it's just a matter of debugger visualization so you can copy that and use it in your code, for example.
So, if you do this:
You see the double backslash there but it's not in the actual string, of course. See what you get in the console:
My advice is that you simulate a double click on the selected file by running this:
System.Diagnostics.Process.Start(filetoplay);
It should open your default mp3 player. I think it will give you an error due to missing file, wrong format or something. If it plays, then the bug is on the player part of your code and you can stop worrying about the double slashes. :)
It shows two backslashes in the variable value because the \ is escaped. If you print the variable value to console, you should find that it has only one backslash.
Try to use Path.Combine
link to msdn.microsoft.com
P.S. Single \ is "escape sign" and is used with "special charakters" ex: "\t" is "tab" and "\n" is "new line", that means, when you want to post "\" in your string, you must post "\".
P.S.2 When you are creating "path" use "Patch.Combine".
I want find and replace a substring in a string in C#.
The substring I want to find looks like this:
],\"
and the substring i want to replace looks like this ],\"Name
This is what i tried so far:
string find = #"],\""";
string replace = #"],\""Name";
string newjson = jsonstring.Replace( find, replace );
From your comment
Debugger show me like this "],\\\"Name"
That is the correct output, the debugger is showing you the escaped version of your string. the \\ turns in to a single \ and the \" turns in to a " once the escaping has been applied.
If you click the magnifying glass in the box in your debugger it will open a new window with the escaping applied.
Are you getting any errors when doing what you did?
Otherwise try without using a literal "#"
so something like this:
string find = "],\\\"";
string replace = "],\\\"Name";
string newjson = jsonstring.Replace(find, replace);
Sometime double quotes and string literals still give me issues so I do it that way without using the literal. Hope that helps.
I have the following property:
public string InstanceName
{
get
{
return cbServerInstanceName.Text;
}
}
where the input for
cbServerInstanceName.Text = "ServerName\ PcName"
This is showing up as
"ServerName\\ PcName"
I tried using the string.replace but couldnt get it to work.
Any ideas?
When you are using C# and looking at strings in the debugger, it will escape certain characters and \ is one of them; it will show in the debugger as \\ but at runtime and not viewed in the debugger, it will be converted to a single \
I'm going to take a stab at it and assume you're seeing "ServerName\\ PcName" using the debugger view in Visual Studio. Since it is showing you "a string\\" instead of a #"string literal\", you will see your slashes escaped. Just as you would with "\r\n" if you added a new-line.
If you can try printing your value to a MessageBox, or Debug or the Console. It should appear as you expect. fingers crossed
I am giving path to my file which i want to read in my program like this, path = "c:/users/abcd/desktop/read.txt" but while debugging i found it's showing like c://users//abcd//desktop//read.txt which is an invalid path.
Is there something i am missing or how should i go about declaring a path.
I would just use:
#"c:\user\abcd\desktop\read.txt"
(note the use of the #). Another likely issue is permissions; does the app have access to user acbd's desktop? You might also look at:
Environment.GetFolderPath(System.Environment.SpecialFolder.DesktopDirectory)
and
Environment.GetFolderPath(System.Environment.SpecialFolder.Desktop)
Try path = #"c:\user\abcd\desktop\read.txt"
I haven't worked with C# for a while, but is it possible that the debugger is just showing you the escaped version of the string but the string itself is ok? Click on the magnifying glass next to the string in your debugger to show the text visualizer and see if it looks ok there.
I'm guessing that these are backslashes. This is the debugger's way of showing certain characters. A newline would show up as "\r\n", a tab as "\t", and a backslash as "\\". The string "a\b\c\d" will show up in the debugger as "a\\b\\c\\d" because that is what you have to type into code to get the actual string "a\b\c\d". When the debugger shows doubled backslashes, each \ is actually a single .
The debugger is just showing you the escaped version of the file. I note that one of your paths contains the string "user" while the other contains "users" is the pluralization the problem?
A string variable str contains the following somewhere inside it: se\">
I'm trying to find the beginning of it using:
str.IndexOf("se\\\">")
which returns -1
Why isn't it finding the substring?
Note: due to editing the snippet showed 5x \ for a while, the original had 3 in a row.
Your code is in fact searching for 'se\\">'. When searching for strings including backslashes I usually find it easier to use verbatim strings:
str.IndexOf(#"se\"">")
In this case you also have a quote in the search string, so there is still some escaping, but I personally find it easier to read.
Update: my answer was based on the edit that introduced extra slashes in the parameter to the IndexOf call. Based on current version, I would place my bet on str simply not containing the expected character sequence.
Update 2:
Based on the comments on this answer, it seems to be some confusion regarding the role of the '\' character in the strings. When you inspect a string in the Visual Studio debugger, it will be displayed with escaping characters.
So, if you have a text box and type 'c:\' in it, inspecting the Text property in the debugger will show 'c:\\'. An extra backslash is added for escaping purposes. The actual string content is still 'c:\' (which can be verified by checking the Length property of the string; it will be 3, not 4).
If we take the following string (taken from the comment below)
" '<em
class=\"correct_response\">a
night light</em><br
/><br /><table
width=\"100%\"><tr><td
class=\"right\">Ingrid</td></tr></table>')"
...the \" sequences are simply escaped quotation marks; the backslashes are not part of the string content. So, you are in fact looking for 'se">', not 'se\">'. Either of these will work:
str.IndexOf(#"se"">"); // verbatim string; escape quotation mark by doubling it
str.IndexOf("se\">"); // regular string; escape quotation mark using backslash
This works:
string str = "<case\\\">";
int i = str.IndexOf("se\\\">"); // i = 3
Maybe you're not correctly escaping one of the two strings?
EDIT there's an extra couple of \ in the string you are searching for.
Maybe the str variable does not actually contain the backslash.
It may be just that when you mouse over the variable while debugging, the debugger tooltip will show the escape character.
e.g. If you put a breakpoint after this assignment
string str = "123\"456";
the tooltip will show 123\"456 and not 123"456.
However if you click on the visualize icon, you will get the correct string 123"456
Following code:
public static void RunSnippet()
{
string s = File.ReadAllText (#"D:\txt.txt");
Console.WriteLine (s);
int i = s.IndexOf("se\\\">");
Console.WriteLine (i);
}
Gives following output:
some text before se\"> some text after
17
Seems like working to me...
TextBox2.Text = TextBox1.Text.IndexOf("se\"">")
seems to work in VB.
DoubleQuotes within a string need to be specified like "" Also consider using verbatim strings - So an example would be
var source = #"abdefghise\"">jklmon";
Console.WriteLine(source.IndexOf(#"se\"">")); // returns 8
If you are looking for se\">
then
str.IndexOf(#"se\"">")
is less error-prone. Note the double "" and single \
Edit, after the comment: it seems like the string may contain ecaping itself, in which case in se\"> the \" was an escaped quote, so the literal text is simply se"> and the string to use is Indexof("se\">")