如何在Server Control / C＃中获取ID？

Question

I try to write a simple Server Control to control the Banners in my site.

It should be somethink like:

<Banners:mng_bnr ID="Upper_bnr / aside_bnr / bottom_bnr / etc" runat="server" />

And then the Control will be something like:

    <%@ Control Language="C#" %>

<script runat="server">

 protected void Page_Load(object sender, EventArgs e)
 {


 switch(which_banner)
 {
 case which_banner.upper_banner_wide: 
<!-- Ad code -->
 <script type="text/javascript"><!--
JS code
 </script>
 <script type="text/javascript"

 </script>
 <!-- *** Ad Code *** --> 
break;

case which_banner.upper_banner_small:
 <!-- Ad code -->
 <script type="text/javascript"><!--
JS code
 </script>
 <script type="text/javascript"

 </script>
 <!-- *** Ad Code *** --> 
break;

case which_banner.aside_336_280_top:

 <!-- Ad code -->
 <script type="text/javascript"><!--
JS code
 </script>
 <script type="text/javascript"

 </script>
 <!-- *** Ad Code *** -->

But, I don't know how to get and handle the ID of each control (there should be around 5-6 controls on each page which every one will have it own ID - which mean different banner)

Thanks a lot.

Answer 1

This post is overly vague. I think what you are asking is how to pass the ID's of your banner control from the parent page into this control. In that case you would do something like this:

 private string _bannerId = string.Empty;
 public string BannerId
 {
      get { return _bannerId; }
      set { _bannerId = value; }
 }

Then your switch looks like this:

 switch(_bannerId)
 {
     case "banner1":
     break;

     case "banner2":
     break; 
 }

Then on your parent page you would do something like this:

 <Banners:mng_bnr BannerId="Upper_bnr" runat="server" />

If you want to pass in multiple banner id's I would suggest either using a collection or providing a property for each banner but this really depends on what you are trying to achieve.

Hope this helps.

--Edit--

In terms of writing out the necessary code there are plenty of ways you can do that. You could, for example, do something like this:

switch(_bannerId)
{
 case "banner1":
     scriptLiteral.Text = "<script>...</script>";
 break;

 case "banner2":
     scriptLiteral.Text = "<script>...</script>";
 break; 
}

And then on your control you would have

<asp:Literal id="scriptLiteral" runat="server" />

I would probably use RegisterClientScriptBlock though.