Handy string extensions and utilities for .NET
This is a collection of string things I find myself writing in every project I work on. I want to get it all down in one place so I don't keep rewriting the same stuff. Maybe it can help someone else if I make it public.
dotnet add package StringThings
Beat primitive obsession by making specific types of strings. Unique types allow you to do things like more easily inject different strings. TypedString implicitly casts to string so it can still be used with code you don't control that requires strings.
// type to hold a string for your database connection stringpublicclassDbConnectionString:TypedString{publicDbConnectionString(stringvalue):base(value){}}// register instance with dependency injectionservices.AddSingleton(newDbConnectionString("...from config..."));// ask for the registered DbConnectionString in your apppublicclassHomeController(DbConnectionStringconnStr){publicActionResultIndex(){varconn=newSqlConnection(connStr);}}Because it's so annoying to type StringComparison.OrdinalIgnoreCase.
usingStringThings.Extensions;// all return true"ABC".EqualsIgnoreCase("abc");"ABC".StartsWithIgnoreCase("abc");"ABC".EndsWithIgnoreCase("abc");"ABC".ContainsIgnoreCase("abc");No more length errors when using substring to get the leading or trailing characters from a string. Let this extension do the work for you of verifying that your substring doesn't exceed the length of the string you are evaluating.
Prevents this error:
Index and length must refer to a location within the string.
usingStringThings.Extensions;"principal".TakeLast(3);// returns "pal""ABC-123".TakeFirst(3);// returns "ABC""tiny".TakeLast(5);// returns "tiny" (with no error!)"This is a sentence".TakeFirst(8);//returns "This is "Why use string.IsNullOrEmpty or string.IsNullOrWhiteSpace when it could be an extension method?
usingStringThings.Extensions;// all return true((string)null).IsNullOrEmpty();" ".IsNullOrWhiteSpace();Because writing new List<string> {"A", "B"}.Contains is annoying.
usingStringThings.Extensions;// all return truevaroptions=new[]{"A","B"};"A".EqualsAny(options);"B".EqualsAny(options);"a".EqualsAnyIgnoreCase(options);