关于listbox!!

[hf26snowolf]

listbox里面的item项有没有vlaue值？一般来说会有index,text和vlaue三个值，但listbox的item的vlaue值我没能查到该怎么设，这个值必须在listbox初始化的时候就设上吗？后面不能改？怎么改？

[cja03]

没有，自己写一个吧，新建一个类，然后用下面的类覆盖：

    public class MyListBox:ListBox
    {
        MyItem[] items;
        public MyItem[] MyItems
        {
            get { return this.items; }
            set
            {
                this.items = value;
                if (value != null)
                {
                    this.Items.Clear();
                    for (int i = 0; i < value.Length; i++)
                    {
                        this.Items.Add(value[i].Text);
                    }
                }
            }
        }

        protected override void OnSelectedIndexChanged(EventArgs e)
        {
            base.OnSelectedIndexChanged(e);

            if (this.SelectedIndexChanged2 != null)
            {
                MyItem item = this.items[this.SelectedIndex];
                this.SelectedIndexChanged2(item);
            }
            
        }

        public delegate void SelectedIndexChangedHandler(MyItem SelectItem);
        public event SelectedIndexChangedHandler SelectedIndexChanged2;
    }

    public class MyItem
    {
        public int Index { get; set; }
        public string Text { get; set; }
        public string Value { get; set; }
    }

        private void myListBox1_SelectedIndexChanged2(MyItem SelectItem)
        {
            MessageBox.Show(SelectItem.Index.ToString() + " " + SelectItem.Text + " " + SelectItem.Value);
        }

[子夜1978]

1楼正解！学习！