Question

C#中在窗体上建立一个标签文本框一个按钮在列表框中列有12个同学的姓名，当选定某个学生姓名时，单击

C#中在窗体上建立一个标签文本框一个按钮在列表框中列有12个同学的姓名，当选定某个学生姓名时，单击此按钮则在文本框中显示出该学生的班级

Answer 1

public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
this.textBox1.Text = stu1[this.listBox1.SelectedIndex].classes;
}
student[] stu1=new student [3];
private void Form1_Load(object sender, EventArgs e)
{
stu1[0] = new student("s0", "c00");
stu1[1] = new student("s1", "c01");
stu1[2] = new student("s2", "c02");
for (int i = 0; i < stu1.Length; i++)
this.listBox1.Items.Add(stu1[i].name);
}

}
单独定义类，以三个学生为例。

Answer 2

@Override
public void cancelled() {
handler.cancelled();
close(client);
}

Answer 3

49kuai帮做

Answer 4

50kuai帮做。