InnerText exception

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When I watch "head" object in visual studio in debug, so it writes "InnerText = (InnerText) threw an exception of type system.Web.HttpException."

Why it happens?

Dim head As HtmlHead = New HtmlHead()
        Dim title As HtmlTitle = New HtmlTitle()
        head.Controls.Add(title)

Thanks

Posted 6-Nov-10 23:20pm

TheAteist

Updated 6-Nov-10 23:33pm

v2

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Ed Guzman · Answer 1 · 2010-11-07T00:06:00

Solution 2

You forgot to add into your aspx page the following:

XML

<head runat="server">
</head>

Your html header must be runat=server in order to execute your code

Posted 7-Nov-10 0:06am

Ed Guzman

Comments

TheAteist 7-Nov-10 7:24am

What "runat='server'"?
This code was taken from .vb that was generated from aspx page.
I get this error only when I add title to head

why?

Ed Guzman 7-Nov-10 8:42am

Look at the aspx page and add the code I gave you into it, not into .vb

TheAteist 8-Nov-10 2:36am

I create the page programmaticall. Here is the whole code
Private Function buildTitleControl() As HtmlTitle
Return New HtmlTitle()
End Function
Private Function buildLinkControl() As HtmlLink
Dim link As HtmlLink = New HtmlLink()
link.Href = "inc/newsletter.css"
link.Attributes.Add("rel", "stylesheet")
link.Attributes.Add("type", "text/css")

Return link
End Function
Private Function buildHeadControl() As HtmlHead
Dim head As HtmlHead = New HtmlHead("head")
Dim title As HtmlTitle = buildTitleControl()

head.Controls.Add(title)
Dim link As HtmlLink = buildLinkControl()
head.Controls.Add(link)

Return head
End Function
Private Function buildFormControl(ByVal page As Page) As Control
Dim ascx As Control = page.LoadControl("NewsLetter.ascx")
Return ascx
End Function

Private Function buildHtml() As String
Dim page As Page = New Page

page.Controls.Add(New LiteralControl("\r\n<!DOCTYPE html PUBLIC ""-//W3C//DTD XHTML 1.0 Transitional//EN"" ""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"">\r\n\r\n<html xmlns=""http://www.w3.org/1999/xhtml"">\r\n"))
Dim head As HtmlHead = buildHeadControl()
page.Controls.Add(head)
page.Controls.Add(New LiteralControl("\r\n<body>\r\n<div>\r\n"))
Dim form As Control = buildFormControl(page)
page.Controls.Add(form)
page.Controls.Add(New LiteralControl("\r\n</div>\r\n</body>\r\n</html>\r\n"))

page.ProcessRequest(HttpContext.Current)

Dim sb As StringBuilder = New StringBuilder()
Dim sw As StringWriter = New StringWriter(sb)
Dim htw As HtmlTextWriter = New HtmlTextWriter(sw)
page.RenderControl(htw)

Return sb.ToString()
}

Abhishek Sur · Answer 2 · 2010-11-06T23:24:00

Solution 1

Actually this happens on any other property as well.

It is because you are checking a property which does have definition but not everything correctly initialized.

Posted 6-Nov-10 23:24pm

Abhishek Sur

Comments

TheAteist 7-Nov-10 5:35am

I improved the code.
Before the execution of "head.Controls.Add(title)":
1 - When I watch "head" it shows - "{InnerText = ""}"
2 - When I wathc "title" it shows - "{System.Web.UI.HtmlControls.HtmlTitle}"
After the exectuion of head.Controls.Add(title)":
When I watch "head" it shows "{InnerText = (InnerText) threw an exception of type System.Web.HttpException.}"

Why? How to fix it?