listview 嵌套 dropdownlist的问题

marsgeorge 2012-03-31 08:15:06

一个listview的表里面的内容是根据上面形状、颜色、净度等按钮的点击后从数据库中搜索出来的，现在要求在listview表里增加一个dropdownlist，让客户可以选择地区，选择后对应行的价格会发生变动，但是现在选择后价格不会更新，求教如何修改，因价格参数不能曝露，所以价格必须要在后台完成

下附原码 step.aspx

<asp:UpdatePanel ID="ChoosedBt" runat="server" UpdateMode="Conditional" ChildrenAsTriggers="false"><ContentTemplate>

  <div class="chooseFA fl">

  <div class="chooseFA_filter_bt fn" id="chooseFAclassName" title='<%=ClassName5%>'><b><%=ClassName5%></b></div>

  <ul class="BtListView">

  <asp:ListView runat="server" ID="ProductsList" DataKeyNames="ProductsID"><ItemTemplate>

  <li><asp:ImageButton runat="server" ID="ProductsButton" ImageUrl='<%# Eval("xPicUrl") %>' class="fl chooseBt" CommandName="Choose1" OnClick="Choosed" /></li></ItemTemplate>

  <EmptyDataTemplate><li class="empty"><b>没有您选择的产品！</b></li></EmptyDataTemplate>

  </asp:ListView><li class="fn"></li></ul>

......

  </div>



  <div class="chooseFA_show fl">

  <div class="chooseFAinfo">

  <div class="img"><asp:Image runat="server" ID="FA_showxPic" Width="200" Height="148" /></div>

  <div class="info">

  <p class="tc"><b><asp:Label runat="server" ID="FA_showName"></asp:Label></b></p>

  <p class="describe"><asp:Label runat="server" ID="FA_showdInfo"></asp:Label></p>

  </div>

  <div class="moreinfo"><asp:HyperLink runat="server" ID="FA_showcInfo" >查看详情 >></asp:HyperLink></div>

  </div>

  </div>



  <div class="stepChoose fn">

  <asp:Button ID="stepNext" runat="server" CssClass="button_w85 stepNext fr" OnClick="stepNext_Click" />

  <asp:Button ID="reChoose" runat="server" CssClass="button_w85 reChoose fr" OnClick="reChoose_Click" />

  </div>

  <input id="chooseFA_1hd" runat="server" value="0" type="hidden" />

  <input id="chooseFA_2hd" runat="server" value="0" type="hidden" />

  <input id="chooseFA_3hd" runat="server" value="0" type="hidden" />

  <input id="chooseFA_4hd" runat="server" value="0" type="hidden" />

  <input id="chooseFA_5hd" runat="server" value="0" type="hidden" />

  <input id="chooseFA_6hd" runat="server" value="0" type="hidden" />



  <div id="ProductsListShow">

  <ul>

  <li class="id"><b>选择</b></li>

  <li class="ProductsName"><b>编号</b></li>

  ......

  <li class="Place"><b>地区</b></li>

<li class="Cert"><b>证书</b></li>

<li class="Price"><b>价格</b></li>

......

  </ul>

  <div class="ProductsListDiv">

  <asp:ListView ID="ProductsListView" runat="server" DataKeyNames="id">

  <ItemTemplate>

  <ul>

  <li class="id">......</li>

<li class="ProductsName"><asp:Label ID="ProductsName" runat="server" Text='<%#Eval("ProductsName")%>'></asp:Label></li>

......

  <li class="Place"><asp:DropDownList runat="server" SelectedValue='<%#Eval("Place")%>'  

  ID="PlaceList" DataSource="<%# PlaceDL() %>" DataTextField="PlaceName"  

  DataValueField="PlaceType" OnSelectedIndexChanged="SelectedChanged" AutoPostBack="True" Height="18"></asp:DropDownList></li>

......

  <li class="Price"><asp:Label ID="Prices" runat="server" Text='<%#Eval("Prices")%>'></asp:Label></li>

......

  </ul>

  </ItemTemplate>

  <EmptyDataTemplate><b style="padding-top:20px;height:50px;">没有相关数据可以显示！</b></EmptyDataTemplate>

  </asp:ListView>

  </div>

  </div>

    

  </ContentTemplate>

  <Triggers>

  <asp:AsyncPostBackTrigger ControlID="ProductsList" EventName="DataBound" />

  ......

  <asp:AsyncPostBackTrigger ControlID="ProductsListView" EventName="DataBound"/>

  </Triggers></asp:UpdatePanel>

step.aspx.cs

protected void Page_Load(object sender, EventArgs e)

  {

  if (!Page.IsPostBack)

  {

  ProductsListDB();

    

  }

  }



private void ProductsListDB()

  {

  DataSet ds = DB.ReadDs("select * from ProductsClass");

  PListViewItemIDP = Convert.ToInt32(ds.Tables[0].Rows[0]["ProductsID"]);

  ProductsList.DataSource = ds.Tables[0].DefaultView;

  FA_ShowDB(PListViewItemIDP);

  ProductsList.DataBind();

  VersionListDB(PListViewItemIDP);

  Session["CPV"] = PListViewItemIDP.ToString();

  CheckChoose();

  }



public void SelectedChanged(object sender, EventArgs e)

  {

  DropDownList ddlName = (DropDownList)sender;//获取现在的事件触发者

  ListViewDataItem gvr = (ListViewDataItem)ddlName.NamingContainer;//获得NamingContainer下

  int Rid = Convert.ToInt32(ProductsListView.DataKeys[gvr.DisplayIndex].Value);



  DataSet dsP = DB.ReadDs("select Price,Density from Products where id = '" + Rid + "'");

  DataSet dsC = DB.ReadDs("select Price from Chip where ChipType = '" + ddlName.SelectedValue + "'");



  double PP = Convert.ToDouble(dsP.Tables[0].Rows[0]["Price"]);

  double PD = Convert.ToDouble(dsP.Tables[0].Rows[0]["PixelDensity"]);

  double ChipP = Convert.ToDouble(dsC.Tables[0].Rows[0]["ChipPrice"]);

  double ChipPo = ChipP * PD;

  double ChipOut = PP + ChipPo;



  Label LName = (Label)gvr.FindControl("Prices");

  LName.Text = Convert.ToString(ChipOut);



  }