ListView 怎么获取 toolStripComboBox1的值。winform.


 private void listdast()
{
            sqlConnection1.Open();
            listView1.Clear();
            listView1.GridLines = true;
            listView1.View = View.Details;
            cmd = new SqlCommand("select * from Library", sqlConnection1);
            dr = cmd.ExecuteReader();
            listView1.Columns.Clear();
            //增加listview控件的列
            listView1.Columns.Add("编号", 80, HorizontalAlignment.Center);
            listView1.Columns.Add("书名", 120, HorizontalAlignment.Center);
            listView1.Columns.Add("作者", 80, HorizontalAlignment.Center);
            listView1.Columns.Add("出版时间", 150, HorizontalAlignment.Center);          //  读取DataReader中的数据并输出
            while (dr.Read())
            {
                ListViewItem li = new ListViewItem();
                li.SubItems.Clear();
                li.SubItems[0].Text = dr["编号"].ToString();
                li.SubItems.Add(dr["书名"].ToString());
                li.SubItems.Add(dr["作者"].ToString());
                li.SubItems.Add(dr["出版时间"].ToString());
                listView1.Items.Add(li);
            }
}
.
      private void Form2_Load(object sender, EventArgs e)
{
            listdast();
            toolStripComboBox1.SelectedIndex = 0;
            da = new SqlDataAdapter("select * from Library",sqlConnection1);           
            ds.Tables.Add("tab");
            da.Fill(ds.Tables["tab"]);
            dv = new DataView(ds.Tables["tab"]);
            dv.RowFilter = "编号='A'";
            dv1 = new DataView(ds.Tables["tab"]);
            dv1.RowFilter = "编号='B'";            //------------------------------------------------------------
            toolStripComboBox1.ComboBox.DataSource = ds.Tables["tab"];//绑定ds数据
            toolStripComboBox1.ComboBox.DisplayMember = "编号";}   private void toolStripComboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
          
            if (toolStripComboBox1.SelectedIndex == 0)
            {
                //怎么获取 dv = new DataView(ds.Tables["tab"]);
                            dv.RowFilter = "编号='A'";里面的值呢，
                //就是当我点A的时候，怎么获取A的值，显示出Listview里面
              //请问这里怎么获取toolStripComboBox1.SelectedIndex == 0的值放在ListView里面呢。？？？
            }在线等，急啊