I was explaining at some point that string is an immutable type. That means that once you assign a value to a string variable, you cannot directly modify it anymore. This also means that any string operation using any function such as Trim(), Replace(), ToUpper(), etc, will actually create a new string in memory where the resulting value will be stored, and it will delete the old, initial value. … Read more
Posts Tagged ‘string operations’
String Builder
Friday, April 21st, 2017Other string methods
Friday, April 21st, 2017There are a number of other string methods that you might find useful. They are:
Compare(), CompareTo(), CompareOrdinal() – determines the sort order of strings. It checks if one string is ordered before another when in alphabetical order, whether it is ordered after, or is equivalent.… Read more
Replacing a string inside another string
Friday, April 21st, 2017Whenever you want to replace a string inside another string, .NET Framework offers the Replace() function. It is a function that accepts two string parameters, the string to be replaced and the string to replace with. Its usage is very simple:
Removing unnecessary characters
Friday, April 21st, 2017Sometimes, and specially when working with validating data such as registration forms, you want to get rid of any characters that are “parasitic”, what the programmers refer to as white spaces. White spaces are characters that are not observable at a first glance, like tabs, a space or a new line character.… Read more
Splitting a string by a separator
Friday, April 21st, 2017There are many cases when we have a string that contains some elements separated by a separator, and we would need to get these elements. For this, we can use the Split() function, which returns an array of strings. The alternative would be to manually search for the separator character using IndexOf() function, then to retrieve the individual substring, and all the extra horrendous work that comes with it.… Read more
Substring
Friday, April 21st, 2017A substring is a string located inside another string. To extract a portion of a string (substring), we can use the Substring() method, with some additional parameters, such as the starting index and the character count or length. Whenever the length parameter is omitted, the function will simply return the substring that starts at the specified index until the end of the string.… Read more
Searching for a string within another string
Friday, April 21st, 2017Another very useful operation when dealing with text is the searching of a certain string or letter inside another string. There are multiple ways of accomplishing this, each behaving in a different way.
The first function that we can use to perform a search is Contains().… Read more
UPPERCASE and lowercase
Friday, April 21st, 2017There are times when we need to convert the letters of a string to either uppercase or lowercase. Fortunately, C# offers us two methods for this: ToUpper() and ToLower(). As imagined, the first one will convert all letters of a string into capital letters, while the latter will do the opposite, by converting them to small ones.… Read more