C# - How to Find a "#" Character in a String

[str1ker]

Hi,

This has been driving me completely crazy, and I'm haunted by it day and night, and I'm sure that there's a simple answer that'll make me bash my head on a wall, but I have not found that answer anyway.

So, I ask now, is there some escape sequence, or some method of finding the # character in a string?

I've also had minor issues with other characters in other situations, like a tab next to a couple of spaces, stuff like that, but all I want to know now is what represents the "#" character in strings.

Thanks,

Ashton

P.S. Again, sorry if it's so easy that it's stupid. I'm not a n00b programmer, proof is my <link removed> project, but seriously, this is driving me crazy.

EDIT by Mod:
We don't need proof, we help n00bs as well as advanced programmers

[Plater]

The # character represents the # character...jus t like a J represents a J....?
I'm not sure what you are having trouble with?
string.IndexOf( "#") should tell you where in the string the first "#" resides?
[code=c#]
string test="dan likes the #14 best";
int n = test.IndexOf("# ");
if (n != -1)
{
MessageBox.Show ("Found at: " + n.ToString());
}
[/code]

[nateraaaa]

Please post the string you are trying to parse for the # character. Also any code that you have tried so far.

thanks
Nathan

[Dragas]

If understanded u well u can do like this:

string example = "1234#56890 ";
bool yesno = false;

for(int i=0; i<example.Lengt h; i++)
{
if(substring(i, 1) == "#") yesno = true;
}

So if # exist in string yesno will be true or u can pick up i as pointer where
in string it is ....

Also if u wana cast out spaces from string u can use
for(int i=0; i<example.Trim( ).Length; i++) instead

Hope will help if understanded you wath you need

[Curtis Rutland]

string s = "abcde#fg";
int index = s.IndexOf("#");

You're doing it the hard way. IndexOf returns the first instance of the search pattern. If it doesn't find it, it returns -1.

To trim:

string s = "   something here   ";
s = s.Trim();
//now s = "something here"

[Curtis Rutland]

You can also use .TrimEnd() and .TrimStart()

[Plater]

Also, strings work as literal character arrays. No need for the substring()
So:
[code=c#]
string fred="jon's new car";
if(fred[4]=='s')
{//whatever you want
}
[/code]

[str1ker]

Thanks for the replies.

Well, I've got this syntax richtextbox, one that does colour-coding to make it easier to read code, shader code specifically, HLSL, and there are two keywords, "#include" and "#define" that I want to highlight.

Trouble is, when I add either of those as a keyword:

syntaxRichTextBox1.Settings.Keywords.Add("#include");
syntaxRichTextBox1.Settings.Keywords.Add("#define");

It doesn't highlight those keywords at all. I've noticed that I get similar inabilities to find # characters in not-so-fancy applications I've developed.

The SyntaxRichTextB ox I found here:

http://www.codeproject.com/KB/edit/SyntaxRichTextBox.aspx

I can settle for just highlighting "include" and "define" by themselves, it's only a bit annoying that # doesn't work.

Thanks,

Ashton

[Plater]

That sounds like an implementation failure on the part of whoever made the custom RichTextBox you are using, and not a fault of string character indexing.

[str1ker]

That sounds like an implementation failure on the part of whoever made the custom RichTextBox you are using, and not a fault of string character indexing.

Yeah, I've been looking through the code more.

There some fancy .NET functions to seek certain character sequences being used. I've tried changing a few settings, but #s are still not found. I forgot the name of the function, so I'll reply back when I find it again.

Something to do with System.Text.Reg ularExpressions I think.