String Methods in C#

Format()

Stringni formatlash uchun ishlatiladi

var testString = string.Format("Hello {0}", 123123);
Console.WriteLine("Hello {0:C}", 123123);
output:Hello 123123

Split()

Stringni substringlarga ajratadi va string array qaytaradi.

var originalString = "olma anor nok";
var mevalar = originalString.Split(' ');
Console.WriteLine(mevalar[0]);
Console.WriteLine(mevalar[1]);
Console.WriteLine(mevalar[2]);
output:
olma
anor
nok

Quyidagi hollarda Split() ko'p ishlatiladi

var sum = Console.ReadLine()?
    .Split(' ', StringSplitOptions.RemoveEmptyEntries)
    .Select(int.Parse)
    .Aggregate((x, y) => x + y);

Console.WriteLine(sum);

Istagancha sonni string ko'rinishida kiritadigan bo'lsak,uni int tipiga o'tkazib,bo'sh probellarni olib tashlab yigindisini hisoblaydi.
Bu yerda RemoveEmptyEntries funksiyasi bo'sh probellarni olib tashlash uchun ishlatilsa,TrimEmptyEntries begilarning ikkala tomonidagi ya'ni oldi va ortidagi probellarni olib tashlaydi.

Substring()

Stringning substringini berilgan indeksdan boshlab qaytarib beradi.

var longString = "This is a very long string";
Console.WriteLine(longString.Substring(5));
Console.WriteLine(longString.Substring(5, 10));

Replace()

Belgilangan eski belgini yangisiga o'zgartirish uchun ishlatiladi
Bu metod ham xuddi Substring metodi kabi yangi string qaytaradi,ya'ni eski stringni o'zgartirib yubora olmaydi.

Console.WriteLine(longString.Replace('i', 'I'));
Console.WriteLine(longString.Replace("is", "IS"));
Console.WriteLine(longString.Replace("Is", "IS", StringComparison.CurrentCultureIgnoreCase));

Contains()

Stringning berilgan substringdan tashkil topgan yoki yo'qligini tekshiradi.

Console.WriteLine(longString.Contains('i'));
Console.WriteLine(longString.Contains('I'));
Console.WriteLine(longString.Contains('I', StringComparison.CurrentCultureIgnoreCase));
Console.WriteLine(longString.Contains("very"));
Console.WriteLine(longString.Contains("VERY"));
Console.WriteLine(longString.Contains("VERY", StringComparison.CurrentCultureIgnoreCase));

Joins()

Ikkita stringni bir-biriga qo'shish uchun ishlatiladi

Console.WriteLine(string.Join(", ", [123, "hello", 'a', 3.14]));

Trim()

Stringning oldi yoki ortidagi barcha bo'sh kataklarni o'chirish uchun ishlatiladi.

var stringWithSpaces = "  hello world     \n";
Console.WriteLine(stringWithSpaces);
Console.WriteLine(stringWithSpaces.Trim());
Console.WriteLine(stringWithSpaces.TrimEnd());
Console.WriteLine(stringWithSpaces.TrimStart());

EndWith()

String berilgan string bilan tugash yoki tugamasligini tekshiradi.

Console.WriteLine(longString.EndsWith("string"));
Console.WriteLine(longString.EndsWith("STRING"));
Console.WriteLine(longString.EndsWith("STRING", StringComparison.CurrentCultureIgnoreCase));

StartWith()

String berilgan string bilan boshlanishini tekshiradi

Console.WriteLine("StartsWith()");
Console.WriteLine(longString.StartsWith("This"));
Console.WriteLine(longString.StartsWith("this"));
Console.WriteLine(longString.StartsWith("this", StringComparison.CurrentCultureIgnoreCase));

IndexOf()

Belgilangan obyektning stringdagi o'rnini qaytarib beradi

Console.WriteLine("IndexOf()");
Console.WriteLine(longString.IndexOf('i'));
Console.WriteLine(longString.IndexOf("very"));
Console.WriteLine(longString.IndexOf("VERY"));
Console.WriteLine(longString.IndexOf("VERY", StringComparison.CurrentCultureIgnoreCase));

Remove()

String ichidagi qaysidir belgi yoki stringni o'chirib tashlaydi

Console.WriteLine(longString.Remove(10));
Console.WriteLine(longString.Remove(10, 5));

ToUpper()

Katta harfga aylantirib qo'yadi

Console.WriteLine("ToUpper()");
Console.WriteLine(longString.ToUpper());

ToLower()

Kichik harfga o'zgartirib qaytaradi

Console.WriteLine("ToLower()");
Console.WriteLine(longString.ToLower());

PadLeft()

String uchun chap tomondan joy ajratib bo'sh joylarni qaysidir belgi orqali to'ldiradi

Console.WriteLine("PadLeft()");
Console.WriteLine("Hello".PadLeft(10));
Console.WriteLine("Hello".PadLeft(10, '+'));

PadRight()

String uchun o'ng tomondan joy ajratib bo'sh joylarni qaysidir belgi orqali to'ldiradi

Console.WriteLine("PadRight()");
Console.WriteLine("Hello".PadRight(10));
Console.WriteLine("Hello".PadRight(10, '+'));

Compare()

Ikkita stringni bir biri bilan solishtirish uchun ishlatiladi.

Console.WriteLine(string.Compare("A", "B"));
Console.WriteLine(string.Compare("B", "AB"));
Console.WriteLine(string.Compare("B", "B"));
Console.WriteLine("A".CompareTo("B"));

Equals()

Ikkita stringning bir biriga teng yoki teng emasligini tekshiradi

Console.WriteLine(string.Equals("Hello", "hello"));
Console.WriteLine(string.Equals("Hello", "hello", StringComparison.CurrentCultureIgnoreCase));
Console.WriteLine("Hello".Equals("hello", StringComparison.CurrentCultureIgnoreCase));