PLACEHOLDER NOT RENDERING CONTROLS... PLS HELP :-(

  • Thread starter Thread starter Mike Speak
  • Start date Start date
M

Mike Speak

I have a user control that I want to use to render 4 menu items
(retrieved from db) on the top of each of my asp.net pages.

The user control defines a table, with one TR and one TD. Within the
TD I have a placeholder defined:

<asp:PlaceHolder ID="categoriesPlaceHolder" Runat="server" />

In the code behind of the user control, on the Page_Load event I am
retrieving data from db and adding controls to the placeholder as
follows:

public class CategoryHeader : System.Web.UI.UserControl
{
protected PlaceHolder categoriesPlaceHolder;

private void Page_Load(object sender, System.EventArgs e)
{
string categoryName = "";
string categoryId = "";
LinkButton categoryItem;

categoriesPlaceHolder = new PlaceHolder();

// DB STUFF HERE

while (myDataReader.Read())
{
// PICK OUT DATA
categoryName = myDataReader["category"].ToString();
categoryId = myDataReader["id"].ToString();

// CREATE A NEW SERVER SIDE LINKBUTTON CONTROL
categoryItem = new LinkButton();
categoryItem.Text = categoryName;
categoryItem.ID = categoryId;
categoryItem.CommandArgument = categoryId;
categoryItem.CommandName = "CategoryLink_Click";

// ADD THE CONTROL TO THE PLACEHOLDER
categoriesPlaceHolder.Controls.Add(categoryItem);
}
}
}

While the rest of the user control is rendering correctly, the
LinkButtons within the placeholder are not rendering at all, there is
nothing within the user control TD where i want the menu items to
appear.

Any expert advice would be greatly appreciated...

TIA
mike...
 
You aren't adding controls to the placeholder you define on your page, you
are adding them to a new local PlaceHolder object, which is private and
never gets rendered. Take out the line where you instantiate a new
PlaceHolder, and things should work fine.
 
Chris Jackson... thank you sooo much. I must have spent hours racking
my brain but you spotted it in one...

THANKS AGAIN!!!!


Chris Jackson said:
You aren't adding controls to the placeholder you define on your page, you
are adding them to a new local PlaceHolder object, which is private and
never gets rendered. Take out the line where you instantiate a new
PlaceHolder, and things should work fine.

--
Chris Jackson
Software Engineer
Microsoft MVP - Windows Client
Windows XP Associate Expert
--
More people read the newsgroups than read my email.
Reply to the newsgroup for a faster response.
(Control-G using Outlook Express)
--

Mike Speak said:
I have a user control that I want to use to render 4 menu items
(retrieved from db) on the top of each of my asp.net pages.

The user control defines a table, with one TR and one TD. Within the
TD I have a placeholder defined:

<asp:PlaceHolder ID="categoriesPlaceHolder" Runat="server" />

In the code behind of the user control, on the Page_Load event I am
retrieving data from db and adding controls to the placeholder as
follows:

public class CategoryHeader : System.Web.UI.UserControl
{
protected PlaceHolder categoriesPlaceHolder;

private void Page_Load(object sender, System.EventArgs e)
{
string categoryName = "";
string categoryId = "";
LinkButton categoryItem;

categoriesPlaceHolder = new PlaceHolder();

// DB STUFF HERE

while (myDataReader.Read())
{
// PICK OUT DATA
categoryName = myDataReader["category"].ToString();
categoryId = myDataReader["id"].ToString();

// CREATE A NEW SERVER SIDE LINKBUTTON CONTROL
categoryItem = new LinkButton();
categoryItem.Text = categoryName;
categoryItem.ID = categoryId;
categoryItem.CommandArgument = categoryId;
categoryItem.CommandName = "CategoryLink_Click";

// ADD THE CONTROL TO THE PLACEHOLDER
categoriesPlaceHolder.Controls.Add(categoryItem);
}
}
}

While the rest of the user control is rendering correctly, the
LinkButtons within the placeholder are not rendering at all, there is
nothing within the user control TD where i want the menu items to
appear.

Any expert advice would be greatly appreciated...

TIA
mike...
Click to expand...
Click to expand...
 
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