C# 一个窗口的label如何读取另一个窗口中listbox里面某个值，并可以同步？

Question

有两个窗体 form1 ，form2（平级关系，上面还有个总form），form2中label.text要读取form1中listbox中某一行（例如第三行）的值。而且当listbox第三行数值被修改（删除），label能自动同步修改值（删除）。

Answer 1

label form代码

    public AddRenameWindow addrename { get; set; }
    //connect with addrename form 's data
public void AlterWindow_Load(object sender, EventArgs e)
{
    //show  teams' name in addrenmae form on this form 
    label4.Text = AddRenameWindow.a[0];
    label5.Text = AddRenameWindow.a[1];
    label6.Text = AddRenameWindow.a[2];
    label7.Text = AddRenameWindow.a[3];
    label8.Text = AddRenameWindow.a[4];
    label9.Text = AddRenameWindow.a[5];
    label10.Text = AddRenameWindow.a[6];
    label11.Text = AddRenameWindow.a[7];
    label12.Text = AddRenameWindow.a[8];
    label13.Text = AddRenameWindow.a[9];
    label14.Text = AddRenameWindow.a[10];
    label15.Text = AddRenameWindow.a[11];
    label16.Text = AddRenameWindow.a[12];
    label17.Text = AddRenameWindow.a[13];
    label18.Text = AddRenameWindow.a[14];
    label19.Text = AddRenameWindow.a[15];
    label20.Text = AddRenameWindow.a[16];
    label21.Text = AddRenameWindow.a[17];
}

listbox form代码
public AlterWindow alter { get; set; }
public static string[] a = new string[30];
public void button4_Click(object sender, EventArgs e)
{
AlterWindow alter = new AlterWindow();

        for (int index = 0; index < listBox1.Items.Count; index++)
        {
            a[index] = Convert.ToString(listBox1.Items[index]);
            //MessageBox.Show(a[i].ToString());
        }
            this.Close();
        }
    }

自己用蠢办法做出来了，虽然蠢但是同步功能完美。

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