Design-time problem with ParseControl ...

[Francois Beauchemin]

Hi, I try to create a custom Webcontrol who load others controls from a
string... My code seems to works well at runtime, but in design-time I
have a NullReferenceException when I try to parse a control with
ParseControl. ( see code bellow )



It is a bug of ParseControl? Or maybe ParseControl is not intended to be
use at design-time ( if so... not documented! ) ...



Anyone have an idea ?



Francois Beauchemin





Note : I'm using .NET Frameworks 1.0 ...





Here is my class :



Public Class TemplateTest

Inherits TemplateControl



Private ctl As Control



Protected Overrides Sub CreateChildControls()

MyBase.CreateChildControls()



Controls.Add(ctl)



End Sub



Protected Overrides Sub OnInit(ByVal e As System.EventArgs)



ctl = ParseControl("<asp:label id=""Label1""
runat=""server"">Test!</asp:label>")



MyBase.OnInit(e)

End Sub

End Class





Here is the stactTrace. ( Sorry for the french message! )





"System.NullReferenceException: La référence d'objet n'est pas définie à
une instance d'un objet.

at System.Web.UI.BaseParser.MapPath(String path, Boolean
allowCrossAppMapping)

at System.Web.UI.BaseParser.MapPath(String path)

at System.Web.UI.TemplateParser.ParseTemplateInternal(String content,
HttpContext context, String baseVirtualDir)

at System.Web.UI.TemplateParser.ParseTemplate(String content,
HttpContext context, String baseVirtualDir)

at System.Web.UI.TemplateParser.ParseControl(String content,
HttpContext context, String baseVirtualDir)

at System.Web.UI.TemplateControl.ParseControl(String content)

at MyNameSpace.TemplateTest.OnInit(EventArgs e) in
C:\test\TemplateTest.vb:line 21"

 

[Victor Garcia Aprea [MVP]]

Hi Francois,

Its not intended to be used at design-time.

--
Victor Garcia Aprea
Microsoft MVP | ASP.NET
Looking for insights on ASP.NET? Read my blog:
http://obies.com/vga/blog.aspx
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and not by private mail.

 

[Francois Beauchemin]

Thanks for your answer.