[开发笔记]winfom ListBox控件选中项上下移动排序

实现ListBox控件选中项上下移动重新排序功能

效果图：

移动后效果：

代码：

/// <summary>
        /// 上移选中项
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, EventArgs e)
        {
            //http://www.cnblogs.com/babycool 酷小孩
            //获取集合中项的数量
            int lbxlength = this.listBox1.Items.Count;
            //选中项的索引
            int isselected = this.listBox1.SelectedIndex;

            if (lbxlength > isselected && isselected > 0)
            {
                object SelectItem = this.listBox1.SelectedItem;
                this.listBox1.Items.RemoveAt(isselected);
                this.listBox1.Items.Insert(isselected - 1, SelectItem);
                this.listBox1.SelectedIndex = isselected - 1;
            }

        }

        /// <summary>
        /// 下移选中项
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button2_Click(object sender, EventArgs e)
        {
            int lbxlength = this.listBox1.Items.Count;
            int isselected = this.listBox1.SelectedIndex;
            if (lbxlength > isselected && isselected < lbxlength - 1)
            {
                object selectItem = this.listBox1.SelectedItem;
                this.listBox1.Items.RemoveAt(isselected);
                this.listBox1.Items.Insert(isselected + 1, selectItem);
                this.listBox1.SelectedIndex = isselected + 1;
            }


        }

        //遍历每一项
        private void button3_Click(object sender, EventArgs e)
        {

            int count = listBox1.Items.Count;
            for (int i = 0; i < count; i++)
            {
                MessageBox.Show(listBox1.Items[i].ToString());
            }
        }

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