如何使用findcontrol？ [英] How to use findcontrol ?

问题描述

我有一个带图像的数据列表以及项目模板中的按钮控件'addtocart'。

为了停止图像闪烁，我已将此按钮单独放在更新面板中。

当我点击这个'addtocart'按钮时，我希望'button Checkout'启用为true。

这个'Checkout'按钮位于该datalist的页脚模板中。问题是没有启用结帐按钮。请指导我。

I have a datalist with images alongwith a button control 'addtocart' within item template.
In order to stop image flickering, I have put this button alone inside update panel.
When I click this 'addtocart' button , I want 'button Checkout' to be enabled true.
This 'Checkout' button is inside footer template of that datalist. The problem is that the 'checkout' button is not getting enabled. Please guide me.

<asp:UpdatePanel ID="dd" runat="server"  >
   <ContentTemplate>
         <asp:Button ID="AddToCart"  runat = "server" Text='Add to Cart'   BackColor="DarkSlateBlue" Width="100px"  Style=" font-family:Arial" ForeColor="White" commandname="myevent">
    </asp:Button>
    </ContentTemplate>
    </asp:UpdatePanel>
    </p>
    </td>
    </tr>
    </table>
    </ItemTemplate>
<FooterStyle  BackColor="AliceBlue"  />
<FooterTemplate>
<br />
    <asp:Button ID="BtnCheckOut"  runat = "server" Text='Checkout'   Enabled="false"

    Width="100px"  onclick="CheckOutBtn_Click" style="z-index: 1; width:80px;cursor:pointer;
    margin-left:350px ; font-family:Arial;  text-align:center; height:22px;  font-weight:600; " > </asp:Button>
<br />

public void dl_item_command(Object sender, DataListCommandEventArgs e)
  {
      if (e.CommandName == "myevent") // check commandname here
      {
          v_FirstSessionTag = "*";
          Session["FirstSessionTag"] = v_FirstSessionTag;
          Button CheckOutBtn = (Button)DataList1.Controls[DataList1.Controls.Count - 1].FindControl("BtnCheckOut");
          CheckOutBtn.Enabled = true;

推荐答案

Button CheckOutBtn = dd.FindControl("BtnCheckOut") as Button;
CheckOutBtn.Enabled = true;

或者尝试放置断点，看看究竟是什么发生在那边。



-KR

Or else try to put breakpoint and see what is actually happening over there.

-KR

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