Develop Reference

Remove text between quotes

I have a program, in which you can input a string. But I want text between quotes " " to be removed.
Example:
in: Today is a very "nice" and hot day.
out: Today is a very "" and hot day.
Console.WriteLine("Enter text: ");
text = Console.ReadLine();
int letter;
string s = null;
string s2 = null;
for (s = 0; s < text.Length; letter++)
{
if (text[letter] != '"')
{
s = s + text[letter];
}
else if (text[letter] == '"')
{
s2 = s2 + letter;
letter++;
(text[letter] != '"')
{
s2 = s2 + letter;
letter++;
}
}
}
I don't know how to write the string without text between quotes to the console.
I am not allowed to use a complex method like regex.

This should do the trick. It checks every character in the string for quotes.
If it finds quotes then sets a quotesOpened flag as true, so it will ignore any subsequent character.
When it encounters another quotes, it sets the flag to false, so it will resume copying the characters.
Console.WriteLine("Enter text: ");
text = Console.ReadLine();
int letterIndex;
string s2 = "";
bool quotesOpened = false;
for (letterIndex= 0; letterIndex< text.Length; letterIndex++)
{
if (text[letterIndex] == '"')
{
quotesOpened = !quotesOpened;
s2 = s2 + text[letterIndex];
}
else
{
if (!quotesOpened)
s2 = s2 + text[letterIndex];
}
}
Hope this helps!

A take without regular expressions, which I like better, but okay:
string input = "abc\"def\"ghi";
string output = input;
int firstQuoteIndex = input.IndexOf("\"");
if (firstQuoteIndex >= 0)
{
int secondQuoteIndex = input.IndexOf("\"", firstQuoteIndex + 1);
if (secondQuoteIndex >= 0)
{
output = input.Substring(0, firstQuoteIndex + 1) + input.Substring(secondQuoteIndex);
}
}
Console.WriteLine(output);
What it does:
It searches for the first occurrence of "
Then it searches for the second occurrence of "
Then it takes the first part, including the first " and the second part, including the second "
You could improve this yourself by searching until the end of the string and replace all occurrences. You have to remember the new 'first index' you have to search on.

string text = #" Today is a very ""nice"" and hot day. Second sentense with ""text"" test";
Regex r = new Regex("\"([^\"]*)\"");
var a = r.Replace(text,string.Empty);
Please try this.

First we need to split string and then remove odd items:
private static String Remove(String s)
{
var rs = s.Split(new[] { '"' }).ToList();
return String.Join("\"\"", rs.Where(_ => rs.IndexOf(_) % 2 == 0));
}
static void Main(string[] args)
{
var test = Remove("hello\"world\"\"yeah\" test \"fhfh\"");
return;
}

This would be a possible solution:
String cmd = "This is a \"Test\".";
// This is a "".
String newCmd = cmd.Split('\"')[0] + "\"\"" + cmd.Split('\"')[2];
Console.WriteLine(newCmd);
Console.Read();
You simply split the text at " and then add both parts together and add the old ". Not a very nice solution, but it works anyway.
€dit:
cmd[0] = "This is a "
cmd[1] = "Test"
cmd[2] = "."

You can do it like this:
Console.WriteLine("Enter text: ");
var text = Console.ReadLine();
var skipping = false;
var result = string.Empty;
foreach (var c in text)
{
if (!skipping || c == '"') result += c;
if (c == '"') skipping = !skipping;
}
Console.WriteLine(result);
Console.ReadLine();
The result string is created by adding characters from the original string as long we are not between quotes (using the skipping variable).

Take all indexes of quotes remove the text between quotes using substring.
static void Main(string[] args)
{
string text = #" Today is a very ""nice"" and hot day. Second sentense with ""text"" test";
var foundIndexes = new List<int>();
foundIndexes.Add(0);
for (int i = 0; i < text.Length; i++)
{
if (text[i] == '"')
foundIndexes.Add(i);
}
string result = "";
for(int i =0; i<foundIndexes.Count; i+=2)
{
int length = 0;
if(i == foundIndexes.Count - 1)
{
length = text.Length - foundIndexes[i];
}
else
{
length = foundIndexes[i + 1] - foundIndexes[i]+1;
}
result += text.Substring(foundIndexes[i], length);
}
Console.WriteLine(result);
Console.ReadKey();
}
Output: Today is a very "" and hot day. Second sentense with "" test";
Here dotNetFiddle

c# regular expression getting specific string from string[CLOSE]

help i want to get the specific string from my string x="Glass 1 1000"; i want to get the string "Glass" only and save it to my string type.
int[] quanvalue = new int[2];
int x1 = 0;
string type = "";
string x="Glass 1 1000";
string[] numbers = Regex.Split(x, #"\D+");
foreach (string value in numbers)
{
if (!string.IsNullOrEmpty(value))
{
int ib = int.Parse(value);
quanvalue[x1] = ib;
MessageBox.Show(quanvalue[0].ToString() + " " + quanvalue[1].ToString());
x1++;
}
else
{
// i want to get string from here
}

string sub = x.Substring(0, 5);

You can use a substring function to fetch the first 5 characters from x.
And save it in x itself

C# Regex for masking E-Mails

Is there a simple way for masking E-Mail addresses using Regular Expressions in C#?
My E-Mail:
myawesomeuser#there.com
My goal:
**awesome****#there.com (when 'awesome' was part of the pattern)
So it's more like an inverted replacement where evertyhing that does not actually match will be replaced with *.
Note: The domain should never be replaced!
From a performance side of view, would it make more sense to split by the # and only check the first part then put it back together afterwards?
Note: I don't want to check if the E-Mail is valid or not. It's just a simple inverted replacement and only for my current needs, the string is an E-Mail but for sure it can be any other string as well.
Solution
After reading the comments I ended up with an extension-method for strings which perfectly matches my needs.
public static string MaskEmail(this string eMail, string pattern)
{
var ix1 = eMail.IndexOf(pattern, StringComparison.Ordinal);
var ix2 = eMail.IndexOf('#');
// Corner case no-#
if (ix2 == -1)
{
ix2 = eMail.Length;
}
string result;
if (ix1 != -1 && ix1 < ix2)
{
result = new string('*', ix1) + pattern + new string('*', ix2 - ix1 - pattern.Length) + eMail.Substring(ix2);
}
else
{
// corner case no str found, all the pre-# is replaced
result = new string('*', ix2) + eMail.Substring(ix2);
}
return result;
}
which then can be called
string eMail = myawesomeuser#there.com;
string maskedMail = eMail.MaskEmail("awesome"); // **awesome****#there.com

string email = "myawesomeuser#there.com";
string str = "awesome";
string rx = "^((?!" + Regex.Escape(str) + "|#).)*|(?<!#.*)(?<=" + Regex.Escape(str) + ")((?!#).)*";
string email2 = Regex.Replace(email, rx, x => {
return new string('*', x.Length);
});
There are two sub-regular expressions here:
^((?!" + Regex.Escape(str) + "|#).)*
and
(?<!#.*)(?<=" + Regex.Escape(str) + ")((?!#).)*
They are in | (or)
The first one means: from the start of the string, any character but stop when you find str (escaped) or #
The second one means: there mustn't be a # before the start of this matching and, starting from str (escaped), replace any character stopping at the #
Probably faster/easier to read:
string email = "myawesomeuser#there.com";
string str = "awesome";
int ix1 = email.IndexOf(str);
int ix2 = email.IndexOf('#');
// Corner case no-#
if (ix2 == -1) {
ix2 = email.Length;
}
string email3;
if (ix1 != -1 && ix1 < ix2) {
email3 = new string('*', ix1) + str + new string('*', ix2 - ix1 - str.Length) + email.Substring(ix2);
} else {
// corner case no str found, all the pre-# is replaced
email3 = new string('*', ix2) + email.Substring(ix2);
}
This second version is better because it handle corner cases like: string not found and no domain in the email.

(awesome)|.(?=.*#)
Try this.Replace by *$1.But there will be an extra * at the start.So remove a * from the masked email from the start.See demo.
https://regex101.com/r/wU7sQ0/29

Non RE;
string name = "awesome";
int pat = email.IndexOf('#');
int pname = email.IndexOf(name);
if (pname < pat)
email = new String('*', pat - name.Length).Insert(pname, name) + email.Substring(pat);

Split numeric and Non-Numeric in a String

If I have a string value like this "1234-", then I need to split till the non-numeric character that is - and add numeric value 1 after the non-numeric char. later I have to update the value to "1234-1". Then the program will check with the last updated value 1234-1 then it will increment by 1 every time and store it for future use. If no non-numeric in a string then the program will increment by 1 with the numeric string.
Below are some examples of String and Output Value
Ex Str1 Output
2014- 2014-1
2014-1 2014-2
AAA AAA1
ABC-ABC ABC-ABC1
12345 12346
1234AA 1234AA1
I have used the below code before.
Code
var SiteFile = (from site in db.SiteFiles where site.Code == "ACQPONUM" select site.Line2).FirstOrDefault(); // Get Input string to generate AUTO number.
int Count = (from Porders in db.Porders where Porders.No.StartsWith(SiteFile) select Porders.No).ToList().Count; // Get the count of matching values in db.
var PONo = (from Porders in db.Porders where Porders.No.StartsWith(SiteFile) select Porders.No).ToList(); // Get list of Matching existing values.
if (Count != 0)
{
if (PONo != null)
{
int Val = (from PONos in PONo let value = Regex.Match(PONos, #"\d+").Value select Convert.ToInt32(value == string.Empty ? "0" : Regex.Match(PONos, #"\d+").Value) + 1).Concat(new[] { 0 }).Max(); // Fiind the maximum value in the matched list nd Increment value by if same type exists in the db.
porder.No = SiteFile + Val.ToString();
}
}
else
{
porder.No = SiteFile + "1";
}
Any help to this will be appreciated.

Maybe something like this:
string s = "123419";
string res = null;
char ch = s[s.Length - 1];
if(char.IsDigit(ch)) // handle numbers
{
res = s.Substring(0,s.Length - 1);
string suffix = null;
// special case
if(ch == '9'){
suffix = "10";
}
else
{
suffix = (++ch).ToString();
}
res += suffix;
}
else
{
res = string.Format("{0}1", s);
}

Try this code:
private string Incrementvalue(string str)
{
string retVal;
if (str.Contains(DELIMITER))
{
string[] parts = str.Split(new char[] { DELIMITER }, 2);
string origSuffix = parts[1];
string newSuffix;
int intSuffix;
if (int.TryParse(origSuffix, out intSuffix))
//Delimiter exists and suffix is already a number: Increment!
newSuffix = (intSuffix + 1).ToString();
else
//Delimiter exists and suffix is NTO number: Add a "1" suffix.
newSuffix = origSuffix + 1;
retVal = parts[0] + DELIMITER + newSuffix;
}
else
{
int temp;
if (int.TryParse(str, out temp))
{
//Delimiter does not exists and the input is a number: Increment last digit!
string newSuffix = (int.Parse(str[str.Length - 1].ToString()) + 1).ToString();
retVal = str.Substring(0, str.Length - 1) + newSuffix;
retVal = str.Substring(0, str.Length - 1) + newSuffix;
}
else
{
//Delimiter does not exists and the input is NOT a number: Add a "1" suffix.
retVal = str + "1";
}
}
return retVal;
}
The code could be written in a much more compact manner, but think this will be more readable and it will work...

How to make a first letter capital in C#

How can the first letter in a text be set to capital?
Example:
it is a text. = It is a text.

public static string ToUpperFirstLetter(this string source)
{
if (string.IsNullOrEmpty(source))
return string.Empty;
// convert to char array of the string
char[] letters = source.ToCharArray();
// upper case the first char
letters[0] = char.ToUpper(letters[0]);
// return the array made of the new char array
return new string(letters);
}

It'll be something like this:
// precondition: before must not be an empty string
String after = before.Substring(0, 1).ToUpper() + before.Substring(1);

polygenelubricants' answer is fine for most cases, but you potentially need to think about cultural issues. Do you want this capitalized in a culture-invariant way, in the current culture, or a specific culture? It can make a big difference in Turkey, for example. So you may want to consider:
CultureInfo culture = ...;
text = char.ToUpper(text[0], culture) + text.Substring(1);
or if you prefer methods on String:
CultureInfo culture = ...;
text = text.Substring(0, 1).ToUpper(culture) + text.Substring(1);
where culture might be CultureInfo.InvariantCulture, or the current culture etc.
For more on this problem, see the Turkey Test.

If you are using C# then try this code:
Microsoft.VisualBasic.StrConv(sourceString, Microsoft.VisualBasic.vbProperCase)

I use this variant:
private string FirstLetterCapital(string str)
{
return Char.ToUpper(str[0]) + str.Remove(0, 1);
}

If you are sure that str variable is valid (never an empty-string or null), try:
str = Char.ToUpper(str[0]) + str[1..];
Unlike the other solutions that use Substring, this one does not do additional string allocations. This example basically concatenates char with ReadOnlySpan<char>.

I realize this is an old post, but I recently had this problem and solved it with the following method.
private string capSentences(string str)
{
string s = "";
if (str[str.Length - 1] == '.')
str = str.Remove(str.Length - 1, 1);
char[] delim = { '.' };
string[] tokens = str.Split(delim);
for (int i = 0; i < tokens.Length; i++)
{
tokens[i] = tokens[i].Trim();
tokens[i] = char.ToUpper(tokens[i][0]) + tokens[i].Substring(1);
s += tokens[i] + ". ";
}
return s;
}
In the sample below clicking on the button executes this simple code outBox.Text = capSentences(inBox.Text.Trim()); which pulls the text from the upper box and puts it in the lower box after the above method runs on it.

Take the first letter out of the word and then extract it to the other string.
strFirstLetter = strWord.Substring(0, 1).ToUpper();
strFullWord = strFirstLetter + strWord.Substring(1);

text = new String(
new [] { char.ToUpper(text.First()) }
.Concat(text.Skip(1))
.ToArray()
);

this functions makes capital the first letter of all words in a string
public static string FormatSentence(string source)
{
var words = source.Split(' ').Select(t => t.ToCharArray()).ToList();
words.ForEach(t =>
{
for (int i = 0; i < t.Length; i++)
{
t[i] = i.Equals(0) ? char.ToUpper(t[i]) : char.ToLower(t[i]);
}
});
return string.Join(" ", words.Select(t => new string(t)));;
}

string str = "it is a text";
// first use the .Trim() method to get rid of all the unnecessary space at the begining and the end for exemple (" This string ".Trim() is gonna output "This string").
str = str.Trim();
char theFirstLetter = str[0]; // this line is to take the first letter of the string at index 0.
theFirstLetter.ToUpper(); // .ToTupper() methode to uppercase the firstletter.
str = theFirstLetter + str.substring(1); // we add the first letter that we uppercased and add the rest of the string by using the str.substring(1) (str.substring(1) to skip the first letter at index 0 and only print the letters from the index 1 to the last index.)
Console.WriteLine(str); // now it should output "It is a text"

static String UppercaseWords(String BadName)
{
String FullName = "";
if (BadName != null)
{
String[] FullBadName = BadName.Split(' ');
foreach (string Name in FullBadName)
{
String SmallName = "";
if (Name.Length > 1)
{
SmallName = char.ToUpper(Name[0]) + Name.Substring(1).ToLower();
}
else
{
SmallName = Name.ToUpper();
}
FullName = FullName + " " + SmallName;
}
}
FullName = FullName.Trim();
FullName = FullName.TrimEnd();
FullName = FullName.TrimStart();
return FullName;
}

string Input = " it is my text";
Input = Input.TrimStart();
//Create a char array
char[] Letters = Input.ToCharArray();
//Make first letter a capital one
string First = char.ToUpper(Letters[0]).ToString();
//Concatenate
string Output = string.Concat(First,Input.Substring(1));

Try this code snippet:
char nm[] = "this is a test";
if(char.IsLower(nm[0])) nm[0] = char.ToUpper(nm[0]);
//print result: This is a test