I am having a few problems with trying to replace backslashes in a date string on C# .net.
So far I am using:
string.Replace(#"\","-")
but it hasnt done the replacement. Could anyone please help?
string.Replace does not modify the string itself but returns a new string, which most likely you are throwing away. Do this instead:
myString= myString.Replace(#"\","-");
On a side note, this kind of operation is usually seen in code that manually mucks around with formatted date strings. Most of the time there is a better way to do what you want (which is?) than things like this.
as all of them saying you need to take value back in the variable.
so it should be
val1= val1.Replace(#"\","-");
Or
val1= val1.Replace("\\","-");
but not only .. below one will not work
val1.Replace(#"\","-");
Use it this way.
oldstring = oldstring.Replace(#"\","-");
Look for String.Replace return type.
Its a function which returns a corrected string. If it would have simply changed old string then it would had a void return type.
You could also use:
myString = myString.Replace('\\', '-'));
but just letting you know, date slashes are usually forward ones /, and not backslashes \.
As suggested by others that String.Replace doesn't update the original string object but it returns a new string instead.
myString= myString.Replace(#"\","-");
It's worthwhile for you to understand that string is immutable in C# basically to make it thread-safe. More details about strings and why they are immutable please see links here and here
Related
I have a string where I need to use as the body of a JSON object. I know its possible that the data could have quotes in it, so I parse through to add an escape character to those instance of quotes.. like so:
string NewComment = comment.Replace("\"", "\\\"");
However, somehow on some edgecases, a quote still makes it through. I don't know if this is something with UTF or some other issue, But I am trying to find a function that would safely create a json compatible string, I figured there has to be something like this out there, or a regex way of doing so.
Basically a TLDR is how to create a json syntax safe string from a c# string
The simple answer is don't do it this way. What if you have escaped quotes in your string? "Hello \"World\"" would become invalid with such a simple approach: "Hello \\"World\\"". JSON.Net or Newtonsoft are going to save you so many headaches in the long run.
I am getting a string in the following format in the query string:
Arnstung%20Chew(20)
I want to convert it to just Arnstung Chew.
How do I do it?
Also how do I make sure that the user is not passing a script or anything harmful in the query string?
string str = "Arnstung Chew (20)";
string replacedString = str.Substring(0, str.IndexOf("(") -1 ).Trim();
string safeString = System.Web.HttpUtility.HtmlEncode(replacedString);
It's impossible to provide a comprehensive answer without knowing what variations might appear on your input text. For example, will there always be two words separated by a space followed by a number in parentheses? Or might there be other variations as well?
I have a lot of parsing code on my Black Belt Coder site, including a sscanf() replacement for .NET that may potentially be useful in your case.
i have a string like this:
some_string="A simple demo of SMS text messaging." + Convert.ToChar(26));
what is the SIMPLEST way of me getting rid of the char 26?
please keep in mind that sometimes some_string has char 26 and sometimes it does not, and it can be in different positions too, so i need to know what is the most versatile and easiest way to get rid of char 26?
If it can be in different positions (not just the end):
someString = someString.Replace("\u001A", "");
Note that you have to use the return value of Replace - strings are immutable, so any methods which look like they're changing the contents actually return a new string with the appropriate changes.
If it's only at the end:
some_string.TrimEnd((char)26)
If it can be anywhere then forget this and use Jon Skeet's answer.
I would like to do the following:
if (string.Contains("/"))
{
string.Replace("/", "\/"); //this isn't valid
}
I've tried
string.Replace("/", "\\/");
but this gives me what I started with. How can I do this?
Thanks
Strings are immutable, which means that any modification you do to a string results in a new one, you should assign the result of the Replace method:
if (myString.Contains("/"))
{
myString = myString.Replace("/", "\\/");
}
String.Replace returns the string with replacements made - it doesn't change the string itself. It can't; strings are immutable. You need something like:
text = text.Replace("/", "\\/");
(In future examples, it would be helpful if you could use valid variable names btw. It means that those wishing to respond with working code can use the same names as you've used.)
One way is to use a verbatim string literal
string.Replace("/", #"\");
Does anyone else think that escaping characters in very short strings make them not very readable? I noticed I was using s = "\"" in my code to assign a double quote a string, but having thought about it, I came up with the following alternative: s = '"'.ToString().
Is my alternative any good? Would you prefer see the first version in code?
How would you go about assigning two double quotes (""), which might be s = "\"\"", to a string?
/me is marking this CW before being pressured into it.
You could use:
String s = new String('"', 1);
or if you like to confuse people:
String s = #"""";
but actually I still prefer the good-old-fashioned escape: \"
I'm not sure the alternative is more readable, on the contrary it's confusing. Besides, using a function call to have a different look in the source code doesn't make much sense - I would even say it's bad practice.
The old-fashioned escape sequence is the best option IMHO.