怎样才能获取updatepanel中动态创建的控件的属性

我在updatepanel中创建了控件但是FindControl不能获取控件，我的代码是这样的<asp:UpdatePanel ID="UpdatePanel1" runat="server">
                                            <ContentTemplate>
                                                <asp:ListBox ID="ListBox1" runat="server" OnSelectedIndexChanged="ListBox1_SelectedIndexChanged"
                                                    AutoPostBack="True" Width="120px"></asp:ListBox>
                                                <asp:ListBox ID="ListBox2" runat="server" AutoPostBack="True" Width="120px" OnSelectedIndexChanged="ListBox2_SelectedIndexChanged">
                                                </asp:ListBox>
                                                <asp:ListBox ID="ListBox3" runat="server" AutoPostBack="True" Width="120px" OnSelectedIndexChanged="ListBox3_SelectedIndexChanged"></asp:ListBox>
                                                <br /> 
                                                <asp:Panel ID="Panel1" runat="server">
                                                    <asp:Table ID="tableshow" runat="server">
                                                    </asp:Table>
                                                    <span id="shownone" onclick="shownone();">查看更多...</span>
                                                    <asp:Table ID="tablenone" runat="server" CssClass="mycss">
                                                    </asp:Table>                                        
                                                </asp:Panel>
                                                <asp:TextBox ID="LblNone" runat="server" Text="" CssClass="mycss"></asp:TextBox>
                        <input type="hidden" id="lblvalue" runat="server" value="" />                                                
                                            </ContentTemplate>
                                        </asp:UpdatePanel>protected void ListBox3_SelectedIndexChanged(object sender, EventArgs e)
    {
        DataTable AttrTable = Category_attributeManager.Get_Category_attribute_By_CategoryId(Convert.ToInt32(this.ListBox3.SelectedItem.Value),1);
        DataTable AttrValueTable = null;
        foreach (DataRowView dv in AttrTable.DefaultView)
        {           
            TableRow tr = new TableRow();
            TableCell tc = new TableCell();
            TableCell tcdt = new TableCell();
            DropDownList drl = null;
            Label lbattr = new Label();
            lbattr.ID = "lbl" + dv["attrId"].ToString();
            lbattr.Text = dv["attrName"].ToString() + " : ";
            tc.Controls.Add(lbattr);            AttrValueTable = Category_valueManager.Get_Category_value_By_AttrId(Convert.ToInt32(dv["attrId"]));
            if (AttrValueTable.Rows.Count != 0)
            {
                drl = new DropDownList();
                drl.DataSource = AttrValueTable.DefaultView;
                drl.DataTextField = "title";
                drl.DataValueField = "valueId";
                drl.AppendDataBoundItems = true;
                drl.Items.Add("==请选择==");
                drl.ID = "AttrDropDownList" + dv["attrId"].ToString();
                drl.DataBind();
                tcdt.Controls.Add(drl);
                this.LblNone.Text += lbattr.ID + "-" + drl.ID + ",";
            }
            else
            {
                TextBox tbox = new TextBox();
                tbox.ID = "AttrTextBox" + dv["attrId"].ToString();
                tcdt.Controls.Add(tbox);
                this.LblNone.Text += lbattr.ID + "-" + tbox.ID + ",";
            }
            tr.Cells.Add(tc);
            tr.Cells.Add(tcdt);
            this.tableshow.Rows.Add(tr);           
        }        DataTable NoneTable = Category_attributeManager.Get_Category_attribute_By_CategoryId(Convert.ToInt32(this.ListBox3.SelectedItem.Value), 0);
        DataTable NoneValueTable = null;
        foreach (DataRowView dv in NoneTable.DefaultView)
        {           
            TableRow tr = new TableRow();
            TableCell tc = new TableCell();
            TableCell tcdt = new TableCell();
            DropDownList dr = null;
            Label lbattr = new Label();
            lbattr.ID = "lbl" + dv["attrId"].ToString();
            lbattr.Text = dv["attrName"].ToString() + " : ";
            tc.Controls.Add(lbattr);
            NoneValueTable = Category_valueManager.Get_Category_value_By_AttrId(Convert.ToInt32(dv["attrId"]));
            if (NoneValueTable.Rows.Count != 0)
            {
                dr = new DropDownList();
                dr.DataSource = NoneValueTable.DefaultView;
                dr.DataTextField = "title";
                dr.DataValueField = "valueId";
                dr.AppendDataBoundItems = true;
                dr.Items.Add("==请选择==");
                dr.ID = "AttrDropDownList" + dv["attrId"].ToString();
                dr.DataBind();
                tcdt.Controls.Add(dr);
                this.LblNone.Text += lbattr.ID + "-" + dr.ID + ",";
            }
            else
            {
                TextBox tbox = new TextBox();
                tbox.ID = "AttrTextBox" + dv["attrId"].ToString();
                tcdt.Controls.Add(tbox);
                this.LblNone.Text += lbattr.ID + "-" + tbox.ID + ",";
            }
            tr.Cells.Add(tc);
            tr.Cells.Add(tcdt);
            this.tablenone.Rows.Add(tr);
        }
    }在Button事件中怎么也获取不到控件
protected void Button1_Click(object sender, EventArgs e)
    {
        
        string[] str = this.LblNone.Text.Split(',');
        string attr = "";        for (int i = 0; i < str.Length; i++)
        {
            if (str[i].IndexOf("AttrDropDownList") != -1)
            {
                string [] cstr = str[i].Split('-');
                string LabelName = cstr[0];
                string DropDownListName = cstr[1];
               // Label l1 = (Label)this.UpdatePanel1.ContentTemplateContainer.FindControl(LabelName); //都是null???
                Label l = (Label)this.Panel1.FindControl(LabelName); //都是null???
                DropDownList d = (DropDownList)this.Panel1.FindControl(DropDownListName);
                if(d.SelectedIndex != 0)
                {
                    attr += l.Text + "-" + d.SelectedItem.Text + ",";
                }               
            }
            else if (str[i].IndexOf("AttrTextBox") != -1)
            {
                string[] ctxt = str[i].Split('-');
                string LabelName = ctxt[0];
                string TxtName = ctxt[1];                Label lb = (Label)this.Panel1.FindControl(LabelName);
                TextBox t = (TextBox)this.Panel1.FindControl(TxtName);
                if(""!=t.Text)
                {
                    attr += lb.Text + "-" + t.Text + ",";
                }
            }
        }        
    }

解决方案 »

  1.   

    Label l1 = sender as Label 
      

  2.   

    Label lbl1=((Label)(this.Panel1.ContentTemplateContainer.FindControl("LblName"));
      

  3.   

    .FindControl("id")  找到你要找的控件
    （控件类型） a = （控件类型）xx..FindControl("id")
    a.属性
      

  4.   


    Panel1不是UpdatePanel它没有ContentTemplateContainer这个属性，报错了
      

  5.   


    我上面的代码就用这个方法的，可是它找不到控件，断点中看到的都是null
      

  6.   


    没有办法啊，水平不够，呵呵情况是这样的，有很多产品，但是每个产品的属性可能都不一样，
    比如我选了（一级）服装-（二级）女装-（三级）女上装，
    那么它的属性有 款式`面料`品牌（这三个是显示出来的），隐藏的还有尺码`季节`图案`颜色`领子`......，我只能用两个表格一个显示，一个隐藏了
    而且属性有可能有很多种，比如款式有长袖`短袖`无袖等等，这需要Dropdaowlist，如果我换了男装的可能属性又完全不一样了，只能动态实现了
      

  7.   

    呵呵 ，你干嘛不适用AjaX技术  动态去根据用户的需求去数据库中选择，或者把类别放到XML文件中，当页面加载的时候先加载到客户端，之后根据 用户的选择来对页面中的XML来进行选择，呵呵 这个是思路，具体操作是可以实现，代码，自己去搜一下很多的。希望对你有用
      

  8.   


    正确
    用FindControl是找不到的