using System;
using System.Data;
using System.Text.RegularExpressions;
using System.Text;
class Class1{
static void Main(string[] args){
Console.WriteLine(Base64EncodeBytes(new byte[5] {45,34,23,54,38}));
}
public static string Base64EncodeBytes(byte[] inputBytes)
{
// Each 3 byte sequence in inputBytes must be converted to a 4 byte sequence
long arrLength = (long)(4.0d * inputBytes.Length / 3.0d);
if ((arrLength % 4) != 0)
{
// increment the array lenght to the next multiple of 4 if it is not already divisible by 4
arrLength += 4 - (arrLength % 4);
}
char[] encodedCharArray = new char[arrLength];
Convert.ToBase64CharArray(inputBytes, 0, inputBytes.Length, encodedCharArray, 0);
return (new string(encodedCharArray));
}
}
Data Types
use the PadLeft() and PadRight() methods to align strings
using System;
class MainClass {
public static void Main() {
string[] myStrings = {"To", "be", "or", "not","to", "be"};
string myString = String.Join(".", myStrings);
string myString14 = '(' + myString.PadLeft(20) + ')';
Console.WriteLine("'(' + myString.PadLeft(20)+ ')' = " + myString14);
string myString15 = '(' + myString.PadLeft(20, '.')
+ ')';
Console.WriteLine("'(' + myString.PadLeft(20, '.') =" + myString15);
string myString16 = '(' + myString.PadRight(20) + ')';
Console.WriteLine("'(' + myString.PadRight(20) + ')' =" + myString16);
string myString17 = '(' +
myString.PadRight(20, '.') + ')';
Console.WriteLine("'(' +myString.PadRight(20, '.') + ')' = " + myString17);
}
}
use the Trim(), TrimStart(), and TrimEnd() methods to trim strings
using System;
class MainClass {
public static void Main() {
string myString18 = '(' +" Whitespace ".Trim() + ')';
Console.WriteLine("'(' +" Whitespace ".Trim() + ')' = " + myString18);
string myString19 = '(' + " Whitespace ".TrimStart() + ')';
Console.WriteLine("'(' +" Whitespace ".TrimStart() + ')' = " + myString19);
string myString20 = '(' + " Whitespace ".TrimEnd() + ')';
Console.WriteLine("'(' +" Whitespace ".TrimEnd() + ')' = " + myString20);
}
}
use the Substring() method to retrieve substrings
using System;
class MainClass {
public static void Main() {
string[] myStrings = {"To", "be", "or", "not","to", "be"};
string myString = String.Join(".", myStrings);
string myString21 = myString.Substring(3);
Console.WriteLine("myString.Substring(3) = " + myString21);
string myString22 = myString.Substring(3, 2);
Console.WriteLine("myString.Substring(3, 2) = " + myString22);
string myString23 = myString.ToUpper();
Console.WriteLine("myString.ToUpper() = " + myString23);
string myString24 = myString.ToLower();
Console.WriteLine("myString.ToLower() = " + myString24);
}
}
use the StartsWith() and EndsWith() methods to check if a string contains a specified substring at the start and end
using System;
class MainClass {
public static void Main() {
string[] myStrings = {"To", "be", "or", "not","to", "be"};
string myString = String.Join(".", myStrings);
Console.WriteLine("myString = " + myString);
if (myString.StartsWith("To")) {
Console.WriteLine("myString starts with "To"");
}
if (myString.EndsWith("be")) {
Console.WriteLine("myString ends with "be"");
}
}
}
use the Join() method to join strings
using System;
class MainClass {
public static void Main() {
string[] myStrings = {"To", "be", "or", "not","to", "be"};
string myString9 = String.Join(".", myStrings);
Console.WriteLine("myString9 = " + myString9);
}
}
use the Copy() method to copy a string
using System;
class MainClass {
public static void Main() {
string myString4 = String.Concat("Friends, ", "Romans");
Console.WriteLine("myString4 = " + myString4);
Console.WriteLine("Copying myString4 to myString7 using Copy()");
string myString7 = String.Copy(myString4);
Console.WriteLine("myString7 = " + myString7);
}
}