วิธี ToUpper() ใน C # ใช้เพื่อส่งคืนสำเนาของสตริงนี้ที่แปลงเป็นตัวพิมพ์ใหญ่
ไวยากรณ์
public string ToUpper ();
ตัวอย่าง
using System;
public class Demo {
public static void Main(String[] args) {
string str1 = "Welcome!";
string str2 = "Thisisit!";
char[] arr1 = str1.ToCharArray(3,2);
char[] arr2 = str2.ToCharArray(2,2);
Console.WriteLine("String1 = "+str1);
Console.WriteLine("String1 ToUpper = "+str1.ToUpper());
Console.WriteLine("String1 Substring from index4 = " + str1.Substring(4, 4));
Console.Write("Character array...String1 =");
for (int i = 0; i < arr1.Length; i++)
Console.Write(" " + arr1[i]);
Console.WriteLine("\n\nString2 = "+str2);
Console.WriteLine("String2 ToUpper = "+str2.ToUpper());
Console.WriteLine("String2 Substring from index2 = " + str2.Substring(0, 5));
Console.Write("Character array...String2 =");
for (int i = 0; i < arr2.Length; i++)
Console.Write(" " + arr2[i]);
}
} ผลลัพธ์
String1 = Welcome! String1 ToUpper = WELCOME! String1 Substring from index4 = ome! Character array...String1 = c o String2 = Thisisit! String2 ToUpper = THISISIT! String2 Substring from index2 = Thisi Character array...String2 = i s
ตัวอย่าง
using System;
using System.Globalization;
public class Demo {
public static void Main(String[] args) {
string str1 = "JackSparrow!";
string str2 = "@#$PQRSTUV!";
Console.WriteLine("String1 = "+str1);
Console.WriteLine("String1 ToUpper = "+str1.ToUpper(new CultureInfo("en-US", false)));
Console.WriteLine("String1 Substring from index4 = " + str1.Substring(2, 2));
Console.WriteLine("\n\nString2 = "+str2);
Console.WriteLine("String2 ToUpper = "+str2.ToUpper(new CultureInfo("en-US", false)));
Console.WriteLine("String2 Substring from index2 = " + str2.Substring(0, 5));
}
} ผลลัพธ์
String1 = JackSparrow! String1 ToUpper = JACKSPARROW! String1 Substring from index4 = ck String2 = @#$PQRSTUV! String2 ToUpper = @#$PQRSTUV! String2 Substring from index2 = @#$PQ
