关于ComboBox中显示DataGridView问题

Question

For VS2005
这个用户控件有一个DataGridView成员    public partial class TemplateDDC : UserControl
    {
        #region 事件
        public event EventHandler Button1Click = null;
        #endregion
        #region 属性
        public DataGridView DataGridView
        {
            get { return this.dataGridView1; }
            set { dataGridView1 = value; }
        }
        #endregion
        public TemplateDDC()
        {
            InitializeComponent();
        }        void button1_Click(object sender, EventArgs e)
        {
            if (Button1Click != null)
                Button1Click(sender, e);
        }
    }

Answer 1

这个用户控件继承自ComboBox    public class TemplateEC:ComboBox
    {
        private ToolStripControlHost controlHost;
        private ToolStripDropDown dropDown;
        private TemplateDDC tddc;
        public TemplateEC()
        {
            tddc = new TemplateDDC();
            tddc.Button1Click += new EventHandler(tddc_Button1Click);            controlHost = new ToolStripControlHost(tddc);            dropDown = new ToolStripDropDown();
            dropDown.Width = this.Width;
            dropDown.Items.Add(controlHost);
        }        void tddc_Button1Click(object sender, EventArgs e)
        {
            /*if (dropDown != null)
            {
                this.Tag = tddc.textBox1.Text;
                this.Text = tddc.textBox1.Text;
                dropDown.Close();
            }*/
        }        public void showDropDown()
        {
            if (dropDown != null)
            {
                dropDown.Size = new System.Drawing.Size(DropDownWidth - 2, DropDownHeight);
                dropDown.Show(this, 0, this.Height);
            }
        }        protected override void WndProc(ref Message m)
        {
            switch (m.Msg)
            {
                case 0x201:
                case 0x203:
                    showDropDown();
                    break;
                default:
                    base.WndProc(ref m);
                    break;
            }
        }        protected override void Dispose(bool disposing)
        {
            if (disposing)
            {
                if (dropDown != null)
                {
                    dropDown.Dispose();
                    dropDown = null;
                }
            }
            base.Dispose(disposing);
        }
    }