Develop Reference

Splitting string with dots and spaces [duplicate]

This question already has answers here:
Regex split string but keep separators
(2 answers)
Closed 7 years ago.
Let's say I have the following string: "This is a test. Haha.". I want to split it so that it becomes these there lines:
Hey.
This is a test.
Haha.
(Note that the space after the dot is preserved).
I tried to split the string using the Split method, and split by the dot, but it returns 3 new strings with the space before the string, and it removes the dots. I want to keep the space after the dot and keep the space.
How can I achieve this?
EDIT: I found a workaround, but I'm sure there's a simpler way:
string a = "Hey. This is a test. Haha.";
string[] splitted = a.Split('.');
foreach(string b in splitted)
{
if (b.Length < 3)
{
continue;
}
string f = b.Remove(0, 1);
Console.WriteLine(f + ". ");
}

I can't test this but due to the post of Darin Dimitrov :
string input = "Hey. This is a test. Haha.";
string result = input.Replace(". ", ".\n");

Remove characters between different parameters [duplicate]

This question already has an answer here:
Learning Regular Expressions [closed]
(1 answer)
Closed 7 years ago.
I have a string of different emails
ex: "email1#uy.com, email2#iu.it, email3#uu.edu" etc, etc
I would like to formulate a Regex that creates the following output
ex: "email1,email2,email3" etc, etc
How can I remove characters between an "#" and "," but leaving a "," and a Space in C#
Thank you so much for the help!!

If you want to replace all characters between # and comma by blank, the easiest option is to use Regex.Replace:
var emails = "a#m.com, b#m.com, d#m.com";
var result = Regex.Replace(emails, "#[^,]+", string.Empty);
// result is "a, b, d"
Please note that it leaves spaces after comma in the result, as you wanted in your question, though your example result has spaces removed.
The regular expression looks for all substrings starting '#' characters, followed by any character which is not comma. Those substrings are replaced with empty string.

Replacing all occurrences of #[^,]+ with an empty string will do the job.
The expression matches sequences that start in #, inclusive, up to a comma or to the end, exclusive. Therefore, commas in the original string of e-mails would be kept.
Demo.

Maybe you don't need to use a regex, in that case you can do the following:
string input = "email1#uy.com, email2#iu.it, email3#uu.edu";
input = input.Replace(" ", "");
string[] ocurrences = input.Split(',');
for (int i = 0; i < ocurrences.Length; i++)
{
string s = ocurrences[i];
ocurrences[i] = s.Substring(0, s.IndexOf('#'));
}
string final = string.Join(", ", occurences);

How do i remove all white spaces from a string? [duplicate]

This question already has answers here:
Efficient way to remove ALL whitespace from String?
(18 answers)
Closed 8 years ago.
I have this code:
if (TextParsingConfiguration.join == true)
{
images = images.Trim(' ');
}
if (TextParsingConfiguration.removecommas == true)
{
images = ReplacingChars(images, new[] { ',', '"' }, " ");
}
join and removecommas are bool variables im using them also in form1 in checkBoxes.
And the ReplacingChars method:
public static string ReplacingChars(string source, char[] toReplace, string withThis)
{
return string.Join(withThis, source.Split(toReplace, StringSplitOptions.None));
}
Maybe im wrong here with the logic but i wanted to give the user two options.
to remove all Remove commas and Quotation marks this the removecommas bool variable.
to join meaning to remove all the whit spaces but not the commas and Quotation marks just remove/delete the white spaces so the whole text will be like a block of text.
The question if number 2 is logic at all ? And if not what other options to remove(clean) i can make ?
The removecommas is working. Its removing commas and Quotation marks and leave the spaces as it was.

Try this :
images= images.Replace(" ", String.Empty);

You could use Regex.Replace like this:
string newString = Regex.Replace(sourceString, #"\s+", replacement);

Maybe something like this:
images = Regex.Replace(images, #"\s+", "");

You can split the text like below,
string[] sp = new string[] { " ", "\t", "\r" };
string[] aa = images.Split(sp, StringSplitOptions.RemoveEmptyEntries);

Removing characters from a string passed from an HTML page [duplicate]

This question already has answers here:
How to remove new line characters from a string?
(11 answers)
Closed 9 years ago.
I'm trying to trim a string of some character so I can put it in an SQL query. An example of what is being passed to my method is "\n asdw_value\n". I want the "\n"s and the space to be removed, but I can't get the "\n" to go away. My code now looks like this :
element = element.Replace("\\", "");
element = element.Replace("n", "");
element = element.Replace(" ", "");
And the output has been "\nasdq_value\n" Any help is appreciated.

Most likely the string value you're seeing is produced in the debugger. The \n is an escape sequence meaning 'newline'. It's a single character, not a \ followed by a n, so to remove it from your input, you will need to use the same escape sequence, like this:
element = element.Replace("\n", "");
element = element.Replace(" ", "");
If you only want to trim these characters from the beginning and end of the string, you can do this:
element = element.Trim(new char[] { '\n', ' ' });

C# string.replace to remove illegal characters [duplicate]

This question already has answers here:
How to remove illegal characters from path and filenames?
(30 answers)
Closed 9 years ago.
I'm working on a program that reads files and saves pieces of them according to their column's title. Some of those titles have illegal characters for file names, so i've written this piece of code to handle those issues.
string headerfile = saveDir + "\\" + tVS.Nodes[r].Text.Replace("\"", "").Replace
("/","").Replace(":"," -").Replace(">","(Greater Than)") + ".csv";
Is there a nicer way of doing this where i don't have 4 .Replace()? or is there some sort of built in illegal character remover i don't know of?
Thanks!
EDIT: It does not need to replace the characters with anything specific. A blank space is sufficient.

Regular expressions are generally a good way to do that, but not when you're replacing every character with something different. You might consider replacing them all with the same thing, and just using System.IO.Path.GetInvalidFileNameChars().
string filename = tVS.Nodes[r].Text;
foreach(char c in System.IO.Path.GetInvalidFileNameChars()) {
filename = filename.Replace(c, '_');
}

System.IO.Path.GetInvalidFileNameChars() has all the invalid characters.
Here's a sample method:
public static string SanitizeFileName(string fileName, char replacementChar = '_')
{
var blackList = new HashSet<char>(System.IO.Path.GetInvalidFileNameChars());
var output = fileName.ToCharArray();
for (int i = 0, ln = output.Length; i < ln; i++)
{
if (blackList.Contains(output[i]))
{
output[i] = replacementChar;
}
}
return new String(output);
}

Have a look at Regex.Replace here, it will do everything you desire when it comes to stripping out characters individually. Selective replacement of other strings may be trickier.

string charsToRemove = #"\/:";TODO complete this list
string filename;
string pattern = string.format("[{0}]", Regex.Escape(charsToRemove));
Regex.Replace(filename, pattern, "");
If you just want to remove illegal chars, rather than replacing them with something else you can use this.