CODEWITHSUNDEEP
asp.netpageloadasp.net-controls
Laziale
Laziale

Reputation: 8225

How to add control to the page programatically in page load?

I am trying to add controls to the page from the code behind in the page load stage like this:

foreach (FileInfo fi in dirInfo.GetFiles())
{
    HyperLink hl = new HyperLink();
    hl.ID = "Hyperlink" + i++;
    hl.Text = fi.Name;
    hl.NavigateUrl = "../downloading.aspx?file=" + fi.Name + "&user=" + userIdpar;
    Page.Controls.Add(hl);
    Page.Controls.Add(new LiteralControl("<br/>")); 
}

The error which I am getting is on Page.Controls.Add(hl) and here is the explanation:

The control collection cannot be modified during DataBind, Init, Load, PreRender or Unload phases.

What can I do to fix this issue? Thanks in advance.

Upvotes: 5

Views: 4480

Answers (2)

Oded
Oded

Reputation: 498904

Create your own container collection and add these to it, instead of directly to the page controls collection.

On .aspx:

<asp:Panel id="links" runat="server" />

In code behind (I suggest using the Init event handler rather than page load):

foreach (FileInfo fi in dirInfo.GetFiles())
{
  HyperLink hl = new HyperLink();
  hl.ID = "Hyperlink" + i++;
  hl.Text = fi.Name;
  hl.NavigateUrl = "../downloading.aspx?file=" + fi.Name + "&user=" + userIdpar;
  links.Controls.Add(hl);
  links.Controls.Add(new LiteralControl("<br/>"));
}

Upvotes: 4

breez
breez

Reputation: 494

Add your controls into Init() event of Page.

Upvotes: -1

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