C#中ListView的清空

Question

lv1=new listView  
lv1.Items.Clear();
for (int m = 0; m < strali.Count; m++)
                    {
                        string strsql1 = "SELECT * FROM [Stock-S] WHERE [goodsname]='" + strali[m] + "' ";
                        string strConnect1 = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=d:\\cangku.mdb";
                        OleDbConnection aConnection1 = new OleDbConnection(strConnect1);
                        OleDbCommand aCommand1 = new OleDbCommand(strsql1, aConnection1);
                        try
                        {
                            aConnection1.Open();
                            OleDbDataReader aReader1 = aCommand1.ExecuteReader();
                            while (aReader1.Read())
                            {
                                ListViewItem li = new ListViewItem();
                                li.SubItems[0].Text = aReader1["goodsname"].ToString();
                                li.SubItems.Add(aReader1["Sum"].ToString());
                                li.SubItems.Add(aReader1["spec"].ToString());
                                li.SubItems.Add(aReader1["lastUpDataUser"].ToString());
                                li.SubItems.Add(aReader1["lastUpDate"].ToString());                                lv1.Items.Add(li);
                            }
                            //关闭reader对象 
                            aReader1.Close();
                            //关闭连接,这很重要 
                            this.Controls.Add(lv1);
                            aConnection1.Close();                        }
                        //一些通常的异常处理                         catch (OleDbException ex)
                        {
                            MessageBox.Show(ex.Message);
                        }
                    }
当我把检索条件重新变化的时候,,,,以前检索出来的条件没有Clear掉,检索出来的条件与新检索出来的条件一起显示出来了!怎么办~~>>

Answer 1

你在while循环前把lv1.Items.Clear();

Answer 2

没有把前面动态生成的ListView删除。干吗要用动态生成控件。放个ListView，然后直接利用它不就可以了吗

Answer 3

主要是我的ListView 要变化的...所以我就用动态的了