I am using Visual studio to create a C# windows form that helps me find the suffix,first and last name of the user. I am using string.split to find the first space and split from there but it only gives me from the first space onward. if the user input " Mr. Donald duck " I can not manage to make it work in the situation.
"Mr. -5 spaces- Donald -5spaces- Duck"
the code doesn't read past the first space.
any suggestions?
Trimming is only going to take care of leading and trailing white-space characters. Here's what you need in order to get just the 3 useful parts of the text when you have all those extra spaces between words:
string name = "Mr. Donald Duck";
string[] split = name.Split(" ".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
The string array will contain 3 items: Mr., Donald, and Duck. The StringSplitOptions.RemoveEmptyEntries will take care of repeating white-space when you split the original string.
Without it, you get something like this: Mr., , , , , Donald, , , , , Duck
You should always use String.Trim() function. (To remove leading and trailing white-space from string) when you deal with user input as a string.
string s = " Mr. Donald duck ";
// Split string on spaces.
// ... This will separate all the words.
string[] words = s.Trim().Split(' ');
//.....check size of array.
if(words.Length ==3)
{
string suffix=words[0];
string firstname=words[1];
string lastname=words[2];
}
I am not getting -5 in your question but hope this will help.
Split with remove empty string option, then you will get non empty word array as result. From that you can get name parts.
Demo
The Syntax for String.Split would be like this:
// 0 1 2
// ooo|oooooo|oooo
string str = "Mr. Donald Duck";
string suffix = str.Split(' ')[0];
string fname = str.Split(' ')[1];
string lname = str.Split(' ')[0];
Just for explanation
According to MSDN You can easily remove white spaces from both ends of a string by using the String.Trim method. You can read it here. For more good understanding you can visit here
string input = Console.ReadLine();
// This will remove white spaces from both ends and split on the basis of spaces in string.
string[] tokens = input.Trim().Split(' ');
string title = tokens[0];
string firstname = tokens[1];
string secondname = tokens[2];
Related
I have the following input:
string txt = " i am a string "
I want to remove space from start of starting and end from a string.
The result should be: "i am a string"
How can I do this in c#?
String.Trim
Removes all leading and trailing white-space characters from the current String object.
Usage:
txt = txt.Trim();
If this isn't working then it highly likely that the "spaces" aren't spaces but some other non printing or white space character, possibly tabs. In this case you need to use the String.Trim method which takes an array of characters:
char[] charsToTrim = { ' ', '\t' };
string result = txt.Trim(charsToTrim);
Source
You can add to this list as and when you come across more space like characters that are in your input data. Storing this list of characters in your database or configuration file would also mean that you don't have to rebuild your application each time you come across a new character to check for.
NOTE
As of .NET 4 .Trim() removes any character that Char.IsWhiteSpace returns true for so it should work for most cases you come across. Given this, it's probably not a good idea to replace this call with the one that takes a list of characters you have to maintain.
It would be better to call the default .Trim() and then call the method with your list of characters.
You can use:
String.TrimStart - Removes all leading occurrences of a set of characters specified in an array from the current String object.
String.TrimEnd - Removes all trailing occurrences of a set of characters specified in an array from the current String object.
String.Trim - combination of the two functions above
Usage:
string txt = " i am a string ";
char[] charsToTrim = { ' ' };
txt = txt.Trim(charsToTrim)); // txt = "i am a string"
EDIT:
txt = txt.Replace(" ", ""); // txt = "iamastring"
I really don't understand some of the hoops the other answers are jumping through.
var myString = " this is my String ";
var newstring = myString.Trim(); // results in "this is my String"
var noSpaceString = myString.Replace(" ", ""); // results in "thisismyString";
It's not rocket science.
txt = txt.Trim();
Or you can split your string to string array, splitting by space and then add every item of string array to empty string.
May be this is not the best and fastest method, but you can try, if other answer aren't what you whant.
text.Trim() is to be used
string txt = " i am a string ";
txt = txt.Trim();
Use the Trim method.
static void Main()
{
// A.
// Example strings with multiple whitespaces.
string s1 = "He saw a cute\tdog.";
string s2 = "There\n\twas another sentence.";
// B.
// Create the Regex.
Regex r = new Regex(#"\s+");
// C.
// Strip multiple spaces.
string s3 = r.Replace(s1, #" ");
Console.WriteLine(s3);
// D.
// Strip multiple spaces.
string s4 = r.Replace(s2, #" ");
Console.WriteLine(s4);
Console.ReadLine();
}
OUTPUT:
He saw a cute dog.
There was another sentence.
He saw a cute dog.
You Can Use
string txt = " i am a string ";
txt = txt.TrimStart().TrimEnd();
Output is "i am a string"
I have input file like this:
input.txt
aa#aa.com bb#bb.com "Information" "Hi there"
cc#cc.com dd#dd.com "Follow up" "Interview"
I have used this method:
string[] words = item.Split(' ');
However, it splits every words with space. I also have spaces in quotes strings but I won't split those spaces.
Basically I want to parse this input from file to this output:
From = aa#aa.com
To = bb#bb.com
Subject = Information
Body = Hi there
How do I split these strings in C#?
Simply you can use Regex as it is said in this question
var stringValue = "aa#aa.com bb#bb.com \"Information\" \"Hi there\"";
var parts = Regex.Matches(stringValue, #"[\""].+?[\""]|[^ ]+")
.Cast<Match>()
.Select(m => m.Value)
.ToList();
//parts: aa#aa.com
bb#bb.com
"Information"
"Hi there"
Also you may try Replace function to remove those " characters.
The String.Split() method has an overload that allows you to specify the number of splits required. You can get what you want like this:
Read one line at a time
Call input.Split(new string[" "], 3, StringSplitOptions.None) - this returns an array of strings with 3 parts. Since email addresses don't have spaces in them, the first two strings will be the from/to addresses, and the third string will be the subject and message. Assume the result of this call is stored in firstSplit[], then firstSplit[0] is the from address, firstSplit[1] is the to address, and firstSplit[2] is the subject and message combined.
Call firstSplit[2].Split(new string[""" """], 2, StringSplitOptions.None) - this searches for the string " " in the concatenated subject+message from the previous call, which should pinpoint the separator between the end of the subject and the start of the message. This will give you the subject and message in another array. (The double-quotes inside are doubled to escape them)
This assumes you disallow double quotes in your subject and message. If you do allow double quotes, then you need to ensure you escape them before putting it in the file in the first place.
You can do this without using regex by just using IndexOf and SubString just put it in a loop if you have multiple emails to parse.
It's not pretty but it would be faster than RegEx if you're doing a lot of them.
string content = #"abba#aa.com dddb#bdd.com ""Information"" ""Hi there""";
string firstEmail = content.Substring(0, content.IndexOf(" ", StringComparison.Ordinal));
string secondEmail = content.Substring(firstEmail.Length, content.IndexOf(" ", firstEmail.Length + 1) - firstEmail.Length);
int firstQuote = content.IndexOf("\"", StringComparison.Ordinal);
string subjectandMessage = content.Substring(firstQuote, content.Length - content.IndexOf("\"", firstQuote, StringComparison.Ordinal));
String[] words = subjectandMessage.Split(new string[] { "\" \"" }, StringSplitOptions.None);
Console.WriteLine(firstEmail);
Console.WriteLine(secondEmail);
Console.WriteLine(words[0].Remove(0,1));
Console.WriteLine(words[1].Remove(words[1].Length -1));
Output:
aa#aa.com
bb#bb.com
Information
Hi there
As Spencer pointed out, read this file line by line using File.ReadAllLines() method and then apply String.Split[] method with spaces using something like this:
string[] elements = string.Split(new char[0]);
UPDATE
Not a pretty solution, but this is how I think it can work:
string[] readText = File.ReadAllLines(' ');
//Take value of first 3 fields by simple readText[index]; (index: 0-2)
string temp = "";
for(int i=3; i<readText.Length; i++)
{
temp += readText[i];
}
Requires reference to Microsoft.VisualBasic, but a bit more reliable than Regex:
using (var tfp = new Microsoft.VisualBasic.FileIO.TextFieldParser("input.txt")) {
for (tfp.SetDelimiters(" "); !tfp.EndOfData;) {
string[] fields = tfp.ReadFields();
Debug.Print(string.Join(",", fields)); // "aa#aa.com,bb#bb.com,Information,Hi there"
}
}
I'm using a data capture software (PSI-Capture) that uses C# scripting. I need to know the best way to convert a captured value to a string and then split on a space or line break character. I'm capturing a full name field (FirstName MiddleName Surname) and sometimes they are in one line or two lines. So I need to split on both spaces and line breaks so I can populate each part of the name in a separate field.
The names are sometimes like that in one line:
MICHAEL JACKSON
And sometimes they are like that in two lines:
MICHAEL JAMES
JACKSON
You can replace the NewLine with space and split on basis of space
string str = str.Replace(Environment.NewLine," ");
string[] array = str.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
Use of StringSplitOptions.RemoveEmptyEntries will ensure that no empty entries remain in array
Let nameInputText be the user input then you can try the following for getting the required array of user name parts:
string actualName = Regex.Replace(nameInputText, #"\r\n?|\n|\s+", "-");
string[] partsOfName = actualName.Split(new char[]{'-'}, StringSplitOptions.RemoveEmptyEntries);
Here in this example, you will get MICHAEL-JAMES-JACKSON in actualName variable and by splitting based on - will gives you the required array of elements, the parts of the name
This might do the trick for you
names = names.Replace(Environment.NewLine, " "); // as suggested by #Dmitry Bychenko
string[] nm = names.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
now if the string[] nm contains 2 elements that means the name doesnt have the middle name so
firstname = nm[0];
if(nm.Length > 2)
{
middlename = nm[1];
lastname = nm[2]
}
else
{
lastname = nm[1]
}
I have this string
"1.3.1.\tProduction and Sales Analysis:"
I want to trim numbers and escape sequences from the start and end of string.
Output Should be :
"Production and Sales Analysis:"
My code :
Char[] trimArray = new Char[] {'0','1','2','3','4','5','6','7','8','9','.',',',':','\\','/'};
String test = "1.3.1.\tProduction and Sales Analysis:";
test = test.TrimEnd(trimArray);
but problem is when a string like 23232-232123-asd-323 comes it also removes the digits
I want to remove the unwanted characters from start and end of string But Want to keep the string like 23232-232123-asd-323 or mobile numbers
Thanks.
Is there always '\t' in the middle?
You can try to split by '\t' and trim end.
Split(new char[]{'\t'});
If colon is always at the end of what you want to get you can split again ;)
If there is something in common separating the bad number and the good numbers like say "t", then how about finding the index of the common letter/symbol then creating a substring of everything after. For example:
String test = "1.3.1.\tProduction and Sales Analysis:";
index = test.LastIndexOfAny(new char[] { 't' });
test = test.Substring(index +1);
This should give you "Production and Sales Analysis:". You could do the same for the ":" except you want everything before it like so
int index = test.LastIndexOfAny(new char[] { ':' });
test = test.Substring(0, index);
With regex:
using System.Text.RegularExpressions;
string input = "1.3.1.\tProduction and Sales Analysis:";
string rgx = #"(?:[0-9.]+)*(?:\\[a-zA-Z])*([\w\s\.\:-_]+)(?:\\[a-zA-Z])*";
string result = Regex.Match(input, rgx).Groups[1].Value.TrimStart();
string temp_constraint = row["Constraint_Name"].ToString();
string split_string = "FK_"+tableName+"_";
string[] words = Regex.Split(temp_constraint, split_string);
I am trying to split a string using another string.
temp_constraint = FK_ss_foo_ss_fee
split_string = FK_ss_foo_
but it returns a single dimension array with the same string as in temp_constraint
Please help
Your split operation works fine for me:
string temp_constraint = "FK_ss_foo_ss_fee";
string split_string = "FK_ss_foo_";
string[] words = Regex.Split(temp_constraint, split_string);
foreach (string word in words)
{
Console.WriteLine(">{0}<", word);
}
Output:
><
>ss_fee<
I think the problem is that your variables are not set to what you think they are. You will need to debug to find the error elsewhere in your program.
I would also avoid using Split for this (both Regex and String.Split). You aren't really splitting the input - you are removing a string from the start. Split might not always do what you want. Imagine if you have a foreign key like the following:
FK_ss_foo_ss_fee_FK_ss_foo_ss_bee
You want to get ss_fee_FK_ss_foo_ss_bee but split would give you ss_fee_ and ss_bee. This is a contrived example, but it does demonstrate that what you are doing is not a split.
You should use String.Split instead
string[] words =
temp_constraint.Split(new []{split_string}, StringSplitOptions.None);
string split uses a character array to split text and does the split by each character which is not often ideal.
The following article shows how to split text by an entire word
http://www.bytechaser.com/en/functions/ufgr7wkpwf/split-text-by-words-and-not-character-arrays.aspx