1. Chapter 3
String manipulation

2. Lowercase? string.ToLower(); Example: string name = “JONES”;
string lastname = name.ToLower(); Or
Console.WriteLine(“Name: {0}”, name.ToLower());
Result:
lastname=“jones”;

3. Uppercase string.ToUpper(); Example: string name = “jones”;
string lastname = name.ToUpper();
Result:
lastname=“JONES”;

4. Length How long is the string? int howlong;
string text = “this is a sentence”;
howlong = text.Length();

5. Padding
Sometimes you want to print a field so that it occupies a fixed number of spaces (eg 20)
string text = “Hello”;
Console.WriteLine(“show ”+ text.PadRight(20,’ ’); Or
Console.WriteLine(“show ”+ text.PadLeft(20,’ ’);

6. Padding Example string number = Convert.ToString(200.55);
Console.WriteLine(“Padded unpadded”);
Console.WriteLine(“{0} {1} {2}”, number.PadRight(15,’ ’), number, number;
Result:
Padded unpadded

7. double salary=400.456;double tax = salary*.02;
double net = salary - tax;
string strsal, strtax, strnet;
strsal = String.Format("{0:N2}",salary);
strtax = String.Format("{0:N2}",tax);
strnet = String.Format("{0:N2}",net);
string hdsal="salary".PadRight(15,' ');
string hdtax="tax".PadRight(15,' ');
string hdnet="net".PadRight(15,' ');
Console.WriteLine("{0} {1} {2}",hdsal,hdtax, hdnet);
Console.WriteLine("{0} {1} {2}",strsal.PadRight(15,' '), strtax.PadRight(15,' '),strnet.PadRight(15,' '));
result
salary tax net

8. Menus
Please enter your choice:
1 List
2 Alpha
3 By zipcode

9. Menus… string text; while (selector != 0) {
int selector=1;
string text;
while (selector != 0) {
Console.Write(“Please enter your choice:\n ”);
Console.Write(“1. List\n2. Alpha\n3. By Zip ”);
selector = Convert.ToInt32 (Console.ReadLine());
if (selector !=0)
Console.Write (“Please enter text ”);
text = Console.ReadLine();}//end if

10. Menu continued switch (selector) { case 0:
Console.WriteLine(“The end”);
break;
case 1:
Console.WriteLine(“Code for List ”);
case 2:
default:
break;}// end switch