After some testing it looks like the reason is that HtmlGenericControl
doesn't support self closing. On server side the HtmlGenericControl("br")
is treated as:
<br runat="server"></br>
There is no </br>
tag in HTML, so the browser shows it as there are two <br />
tags. Nice way out of this is to create HtmlGenericSelfCloseControl
like this (sorry for C# code but you should have no issue with rewritting this in VB.NET):
public class HtmlGenericSelfCloseControl : HtmlGenericControl
{
public HtmlGenericSelfCloseControl()
: base()
{
}
public HtmlGenericSelfCloseControl(string tag)
: base(tag)
{
}
protected override void Render(HtmlTextWriter writer)
{
writer.Write(HtmlTextWriter.TagLeftChar + this.TagName);
Attributes.Render(writer);
writer.Write(HtmlTextWriter.SelfClosingTagEnd);
}
public override ControlCollection Controls
{
get { throw new Exception("Self closing tag can't have child controls"); }
}
public override string InnerHtml
{
get { return String.Empty; }
set { throw new Exception("Self closing tag can't have inner content"); }
}
public override string InnerText
{
get { return String.Empty; }
set { throw new Exception("Self closing tag can't have inner text"); }
}
}
And use it instead:
pDoc.Controls.Add(New Label With {.Text = "whatever"})
pDoc.Controls.Add(New HtmlGenericSelfCloseControl("br"))
As a simpler alternative (if you have reference to the Page
) you can try using Page.ParseControl
:
pDoc.Controls.Add(New Label With {.Text = "whatever"})
pDoc.Controls.Add(Page.ParseControl("br"))