Question

我在Form1中有一个listView1，在Form2中有一个向Form1的listView1添加元素的方法。我收到listView1不存在的错误。如何删除此错误。我的代码是

窗体2：

    public static string s;
    public void button1_Click(object sender, EventArgs e)
    {
        s = textBox1.Text;
        ListViewItem lvi = new ListViewItem(DodajWindow.s);
        listView1.Items.Add(lvi);
        this.Close();
    }

Answer 1

请使用此示例代码使用2个表单，

Form1的代码

public delegate void ListViewAddDelegate(string text);

namespace WindowsFormsApplication2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        public void AddItem(string item)
        {
            listView1.Items.Add(item);
        }

        private void button1_Click(object sender, EventArgs e)
        {
            ListViewAddDelegate Del = new ListViewAddDelegate(AddItem);
            Form2 ob = new Form2(Del);
            ob.Show();
        }
    }


}

Form2的代码

namespace WindowsFormsApplication2
{
    public partial class Form2 : Form
    {
        public ListViewAddDelegate deleg;
        public Form2()
        {
            InitializeComponent();
        }
        public Form2(ListViewAddDelegate delegObj)
        {
            this.deleg = delegObj;
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (!textBox1.Text.Equals(""))
            {
                deleg(textBox1.Text);
            }
            else
            {
                MessageBox.Show("Text can not be emopty");
            }

        }

        private void Form2_Load(object sender, EventArgs e)
        {

        }
    }
}

两个窗口上的C＃listView

1 个答案: