combobox联动

Question

本帖最后由 zdl110110 于 2009-12-07 15:51:02 编辑

Answer 1

在combobox1里的selectIndexChanged事件里给combobox2绑定数据源

Answer 2

给你参考下：
    /// <summary>
        /// 初始化
        /// </summary>
        private void Form2_Load(object sender, EventArgs e)
        {
          this.comboDiffLevel.SelectedIndex = 0;      //设置题目难度
            this.comboItemType.SelectedIndex = 0;     //设置试题类型
            this.comshowtype.SelectedIndex = 0;       //设置显示类型
            bindSelectPoolColl();
        }
        /// <summary>
        /// 绑定所有题库集
        /// </summary>
        void bindSelectPoolColl()
        {
            this.comboItemPoolCollection.DataSource = ipcbll.SelectItemPoolcollection();
            this.comboItemPoolCollection.DisplayMember = "Name";
            this.comboItemPoolCollection.ValueMember = "Code";
        }
        /// <summary>
        /// 根据选中题库集绑定题库
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void comboItemPoolCollection_SelectedValueChanged(object sender, EventArgs e)
        {
            this.comboItemPool.Text = "";
            string strParentcode = comboItemPoolCollection.SelectedValue.ToString();
            this.comboItemPool.DataSource = ipcbll.SelectItemPooltk(strParentcode);
            this.comboItemPool.DisplayMember = "Name";
            this.comboItemPool.ValueMember = "Code";
        }
        /// <summary>
        /// 根据选中的题库绑定对应的知识点
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void comboItemPool_SelectedValueChanged(object sender, EventArgs e)
        {
            this.comKnowledge.Text = "";
            if (this.comboItemPool.Text == "")
            {
                //说明题库为空，对应的知识点也为空
                this.comKnowledge.Text = "";
            }
            else
            {
                string strIPCode = comboItemPool.SelectedValue.ToString();
                this.comKnowledge.DataSource = kdbll.SelectKnowlegecode(strIPCode);
                this.comKnowledge.DisplayMember = "Name";
                this.comKnowledge.ValueMember = "IPCode";
            }
        }