combobox实现模糊查询

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2015-04-30 07:48:13

combobox自己视线模糊查询，系统自带的只能实现从左到右进行匹配，但是我输入不匹配的就报错：System.ArgumentOutOfRangeException: InvalidArgument=“0”的值对于“index”无效。

       

//绑定原始数据源

 private void BindComboBox()

  {

            string str = "select License from tb_drug";

            SQLiteDataReader sdr = sh.getcom(str);

            while (sdr.Read())

            {

                if (sdr[0].ToString() != " " && sdr[0].ToString() != null)

                    listOnit.Add(sdr[0].ToString());               

            }

            sdr.Close();

            this.comboBox1.Items.AddRange(listOnit.ToArray());

}



        private void comboBox1_TextUpdate(object sender, EventArgs e)

        {

            this.comboBox1.Items.Clear();

            listNew.Clear();

            foreach (string item in listOnit)

            {

                if (item.Contains(this.comboBox1.Text))

                {

                    listNew.Add(item);

                }                

            }

            this.comboBox1.Items.AddRange(listNew.ToArray());

            this.comboBox1.SelectionStart = this.comboBox1.Text.Length;

            Cursor = Cursors.Default;

            this.comboBox1.DroppedDown = true;               

        }