How to get the first five character of a String

Question

I have read this question to get first char  of the string  Is there a way to get the first n number of characters from a string in C

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string str    GoodMorning   string strModified   str Substring 0 5

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I have tried the above answers and the best i think is this one   item First Name Substring 0 1    In this i could get the first letter of the string

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Try below code   string Name    Abhishek    string firstfour   Name Substring 0  4    Response Write firstfour

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Append five whitespace characters then cut off the first five and trim the result   The number of spaces you append should match the number you are cutting  Be sure to include the parenthesis before  Substring 0 X  or you ll append nothing   string str    yourStringVariable           Substring 0 5  Trim      With this technique you won t have to worry about the ArgumentOutOfRangeException mentioned in other answers

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No one mentioned how to make proper checks when using Substring    so I wanted to contribute about that   If you don t want to use Linq and go with Substring    you have to make sure that your string is bigger than the second parameter  length  of Substring   function   Let s say you need the first 5 characters  You should get them with proper check  like this   string title    love     15 characters var firstFiveChars   title Length  lt   5   title   title Substring 0  5       firstFiveChars   love   4 characters    Without this check  Substring   function would throw an exception because it d iterate through letters that aren t there   I think you get the idea

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Just a heads up there is a new way to do this in C  8 0  Range operators  Microsoft Docs  Or as I like to call em  Pandas slices    Old way   string newString   oldstring Substring 0  5     New way   string newString   oldstring   5     Which at first glance appears like a pretty bad tradeoff of some readability for shorter code but the new feature gives you   a standard syntax for slicing arrays  and therefore strings     cool stuff like this   var slice1   list 2   3                    list Range Create 2  Index CreateFromEnd 3     var slice2   list    3                     list Range ToEnd Index CreateFromEnd 3     var slice3   list 2                        list Range FromStart 2    var slice4   list                          list Range All

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Below is an extension method that checks if a string is bigger than what was needed and shortens the string to the defined max amount of chars and appends         public static class StringExtensions       public static string Ellipsis this string s  int charsToDisplay                if   string IsNullOrWhiteSpace s               return s Length  lt   charsToDisplay   s   new string s Take charsToDisplay  ToArray                     return String Empty

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You can use Substring int startIndex  int length   string result   str Substring 0 5        The substring starts at a specified character position and has a   specified length  This method does not modify the value of the current   instance  Instead  it returns a new string with length characters   starting from the startIndex position in the current string    MSDN   What if the source string is less then five characters  You will get exception by using above method  We can put condition to check if the number of characters in string are more then 5 then get first five through Substring  Note I have assigned source string to firstFiveChar variable  The firstFiveChar not change if characters are less then 5  so else part is not required   string firstFiveChar   str  If  String IsNullOrWhiteSpace yourStringVariable   amp  amp  yourStringVariable Length  gt   5        firstFiveChar   yourStringVariable Substring 0  5

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Or you could use String ToCharArray     It takes int startindex and and int length as parameters and returns a char    new string stringValue ToCharArray 0 5     You would still need to make sure the string has the proper length  otherwise it will throw a ArgumentOutOfRangeException

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I use   var firstFive   stringValue  Substring 0  stringValue Length  gt   5   5   customAlias Length     or alternative if you want to check for Whitespace too  instead of only Null    var firstFive    String IsNullOrWhiteSpace stringValue   amp  amp  stringValue Length  gt   5   stringValue Substring 0  5    stringValue

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I don t know why anybody mentioned this  But it s the shortest and simplest way to achieve this   string str   yourString Remove n     n - number of characters that you need  Example  var zz    7814148471   Console WriteLine zz Remove 5      result - 78141

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You can use Enumerable Take like   char   array   yourStringVariable Take 5  ToArray      Or you can use String Substring    string str   yourStringVariable Substring 0 5     Remember that String Substring could throw an exception in case of string s length  less than the characters required    If you want to get the result back in string then you can use    Using String Constructor and LINQ s Take  string firstFivChar   new string yourStringVariable Take 5  ToArray        The plus with the approach is not checking for length before hand     The other way is to use String Substring with error checking   like   string firstFivCharWithSubString         String IsNullOrWhiteSpace yourStringVariable   amp  amp  yourStringVariable Length  gt   5       yourStringVariable Substring 0  5        yourStringVariable

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If we want only first 5 characters from any field  then this can be achieved by Left Attribute  Vessel   f Vessel   null   f Vessel Left 5

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In C  8 0 you can get the first five characters of a string like so  string str   data 0  5     Here is some more information about Indices And Ranges

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Kindly try this code when str is less than 5    string strModified   str Substring 0 str Length gt 5 5 str Length

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This is how you do it in 2020  var s    quot ABCDEFGH quot   var first5   s AsSpan 0  5    A Span lt T gt  points directly to the memory of the string  avoiding allocating a temporary string  Of course  any subsequent method asking for a string requires a conversion  Console WriteLine first5 ToString      Though  these days many  NET APIs allow for spans  Stick to them if possible  Note  If targeting  NET Framework add a reference to the System Memory package  but don t expect the same superb performance

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To get the first n number of characters from a string in C     String yourstring  Some Text     String first n Number of Characters yourstring Substring 0 n

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The problem with  Substring    is  that you need to be sure that the given string has at least the length of the asked number of characters  otherwise an ArgumentOutOfRangeException will be thrown   Solution 1  using  Substring     var firstFive   stringValue    null                       stringValue Substring 0  stringValue Length  gt   5   5   stringValue Length                       null    The drawback of using  Substring  is that you ll need to check the length of the given string   Solution 2  using  Take     var firstFive   stringValue    null                        string Join     stringValue Take 5                          null    Using  Take  will prevent that you need to check the length of the given string

User · Answer

Use the PadRight function to prevent the string from being too short  grab what you need then trim the spaces from the end all in one statement   strSomeString   strSomeString PadRight 50  Substring 0 50  TrimEnd

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Please try   yourString Substring 0  5     Check C  Substring  String Substring Method

[c#] How to get the first five character of a String

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