怎么实现listbox的查找

怎么实现listbox的查找
我查找北京
就把有北京的都打出来。怎么实现

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可以用substring取字符串.

我不会啊。帮帮我

弄个字典不就得了

try
            {


          string myconn=  ("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=d:/zzz.mdb");
OleDbConnection thisconnection = new OleDbConnection(myconn);

                OleDbDataAdapter thisadapter = new OleDbDataAdapter("select * from 表名", thisconnection);
                string cx = "select * from 表名 where 1=1";
                if (textBoxfwbh.Text != "")
                {
                    cx += "and 终点站='" + listBox1.Text + "'";
                }
thisadapter.SelectCommand.CommandText = cx;
                thisadapter.SelectCommand.Connection = thisconnection;
                DataSet thisdataset = new DataSet();
                thisconnection.Open();
                thisadapter.SelectCommand.ExecuteNonQuery();
               
                thisadapter.Fill(thisdataset, "表名");
                dataGridView1.DataSource = thisdataset.Tables["表名"];  
            }
            catch (Exception error)
            {
                MessageBox.Show("查询数据失败：" + error.Message, "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Information);


用上面的试试看~~