namespace StringDemo 
{ 
public partial class Form1 : Form 
{ 
public Form1() 
{ 
InitializeComponent(); 
} 
 
private void button1_Click(object sender, EventArgs e) 
{ 
System.Collections.ArrayList mystrlist = new System.Collections.ArrayList(); 
 
mystrlist.Add("aaaaaaaa"); 
mystrlist.Add("bbbbbbbb"); 
mystrlist.Add("cccccccc"); 
mystrlist.Add("dddddddd"); 
 
foreach (string str in mystrlist) 
{ 
textBox1.Text += str + "rn"; 
} 
} 
 
private void button2_Click(object sender, EventArgs e) 
{ 
String[] myArray = { "8", "one", "4", "0", "over", "the" }; 
 
foreach (string str in myArray) 
textBox1.Text += str + "rn"; 
 
textBox1.Text += "rn"; 
 
Array.Sort(myArray); 
 
foreach (string str in myArray) 
textBox1.Text += str + "rn"; 
} 
 
private void button3_Click(object sender, EventArgs e) 
{ 
String[] myArray = { "8", "one", "4", "0", "over", "the" }; 
 
foreach (string str in myArray) 
textBox1.Text += str + "rn"; 
 
textBox1.Text += "rn"; 
 
Array.Reverse(myArray); 
 
foreach (string str in myArray) 
textBox1.Text += str + "rn"; 
} 
 
private void button4_Click(object sender, EventArgs e) 
{ 
String[] myArray = { "one", "two", "three" }; 
 
foreach (string str in myArray) 
textBox1.Text += str + "rn"; 
 
textBox1.Text += "rn"; 
Array.Resize(ref myArray, 5); 
 
myArray[3] = "aaa"; 
myArray[4] = "bbb"; 
 
foreach (string str in myArray) 
textBox1.Text += str + "rn"; 
} 
 
private void button5_Click(object sender, EventArgs e) 
{ 
string[] dinosaurs = { "Compsog0000nathus", 
"Amargasaurus", "Ovira0000ptor","Veloc0000iraptor", 
"Deinonychus","Dilop0000hosaurus","Gallimimus", 
"Triceratops"}; 
 
foreach (string str in dinosaurs) 
textBox1.Text += str + "rn"; 
 
textBox1.Text += "rn"; 
 
//要写一个SubStringis0000的函数,泛型编程 
string[] subArray = Array.FindAll(dinosaurs,SubStringis0000); 
 
foreach (string str in subArray) 
textBox1.Text += str + "rn";
} 
 
private static bool SubStringis0000(string str) 
{ 
if(str.Contains ("0000")) 
return true ; 
else 
return false ; 
} 
 
private void button6_Click(object sender, EventArgs e) 
{ 
string[] dinosaurs = { "Compsog0000nathus", 
"Amargasaurus", "Ovira0000ptor","Veloc0000iraptor", 
"Deinonychus","Dilop0000hosaurus","Gallimimus", 
"Triceratops"}; 
 
foreach (string str in dinosaurs) 
textBox1.Text += str + "rn"; 
 
textBox1.Text += "rn"; 
 
string[] deststr = new string[2]; 
//Copy还有很多类型的参数,比如数组复制等。 
Array.Copy(dinosaurs, 2, deststr, 0, 2); 
 
foreach (string str in deststr) 
textBox1.Text += str + "rn"; 
} 
 
private void button7_Click(object sender, EventArgs e) 
{ 
textBox1.Text = ""; 
} 
} 
}