listBox绑定数据源与模糊筛选

        DataTable a = new DataTable("sx");
        private void Form1_Load(object sender, EventArgs e)
        {
            this.TopMost = true;

           
            a.Columns.Add("sx");
            a.Rows.Add("a123");
            a.Rows.Add("a456");
            a.Rows.Add("a789");
            a.Rows.Add("b123");

            listBox1.DataSource = a.Select("sx like 'a%'").CopyToDataTable();
            listBox1.ValueMember = "sx";
            //System.Threading.Thread.Sleep(2000);
           

           
        }

 

        private void listBox1_DoubleClick(object sender, EventArgs e)
        {
            listBox1.DataSource = a.Select("sx like 'b%'").CopyToDataTable();
            listBox1.ValueMember = "sx";
        }