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Zone: > NEWSGROUP > Asp.Net Forum > general_asp.net.master_pages_themes_and_navigation_controls Tags:
Item Type: NewsGroup Date Entered: 12/28/2006 10:46:47 PM Date Modified: Subscribers: 0 Subscribe Alert
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lcountee
Asp.Net User
programatically referencing a control in a master page12/28/2006 10:46:47 PM

0/0

I want to programatically access a HyperLink control within a master page in order to change the control's NavigateUrl value. The following code is in the master page:

HyperLink PrintLink = (HyperLink)Master.FindControl("PrintLink");

 gets me a NullReferenceException. The control exists; here is the code for the control (also in the master page):

<
asp:HyperLink ID="PrintLink" runat="server" CssClass="navigation" NavigateUrl="#">Print</asp:HyperLink>
 Why can't it see the control?
Rossoneri
Asp.Net User
Re: programatically referencing a control in a master page12/29/2006 4:48:46 AM

0/0

If you are working in the code beside of the master page, then you should be able to just access the control directly. No need to use FindControl()

PrintLink.NavigateUrl = "/";
moredotnet
Asp.Net User
Re: programatically referencing a control in a master page12/29/2006 6:40:57 AM

0/0

Try this... 

Protected

 Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

hl1.NavigateUrl =

"http://www.hotmail.com"

End Sub

where....

<

asp:HyperLink ID="hl1" runat="server" Text="CLICK HERE" NavigateUrl="http://www.yahoo.com"></asp:HyperLink>

 

See that the hyperlink's navigate URL property can be changed at runtime. You use any event as you want (I've used the Page_Load) .

Also, if you are using an ASP.NET Ajax application, then you would need to add this in your web.config...

<

pages >

<

namespaces>

<

clear/>

<

add namespace="System"/>

<

add namespace="System.Collections"/>

<

add namespace="System.Collections.Specialized"/>

<

add namespace="System.Configuration"/>

<

add namespace="System.Text"/>

<

add namespace="System.Text.RegularExpressions"/>

<

add namespace="System.Web"/>

<

add namespace="System.Web.Caching"/>

<

add namespace="System.Web.SessionState"/>

<

add namespace="System.Web.Security"/>

<

add namespace="System.Web.Profile"/>

<

add namespace="System.Web.UI"/>

<

add namespace="System.Web.UI.WebControls"/>

<

add namespace="System.Web.UI.WebControls.WebParts"/>

<

add namespace="System.Web.UI.HtmlControls"/>

</

namespaces>

</

pages>

 Cheers!

moredotnet

 

Cheers
Vishal Khanna | MCAD.NET | Intersoft Data Labs
(Please mark as answer if reply helps)


.NET Interviews & FAQs @ www.dotnetUncle.com



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lcountee
Asp.Net User
Re: programatically referencing a control in a master page12/29/2006 1:49:28 PM

0/0

Thanks for the responses.

Rossoneri - I actually tried what you have before I posted to this forum. That gets me an error that says "The name 'PrintLink' does not exist in the current context."

moredotnet - From my limited understanding of VB, it looks like you did the same thing that I did in C# - my event is actually in the page's onLoad event also. I'm not using AJAX for this app.

Other suggestions?
lcountee
Asp.Net User
Re: programatically referencing a control in a master page12/29/2006 2:02:36 PM

0/0

I tried this again on a different master page, and it worked - not sure what happened with this one, but I'm going to delete the control and insert a new one. Thanks again for the suggestions.
moredotnet
Asp.Net User
Re: programatically referencing a control in a master page1/2/2007 1:12:12 PM

0/0

Please mark the appropriate post as the answer!

Even I didnt use Ajax. I'm sure the same code will work in C# too after conversion.

Cheers!

moredotnet 

 

Cheers
Vishal Khanna | MCAD.NET | Intersoft Data Labs
(Please mark as answer if reply helps)


.NET Interviews & FAQs @ www.dotnetUncle.com



Search & Post Free Ads
lcountee
Asp.Net User
Re: programatically referencing a control in a master page1/2/2007 1:32:56 PM

0/0

moredotnet - I did mark the appropriate post as the answer. Your reply did not help me to resolve the issue.
moredotnet
Asp.Net User
Re: programatically referencing a control in a master page1/3/2007 5:35:56 AM

0/0

Hmmmmmm!Surprise
Cheers
Vishal Khanna | MCAD.NET | Intersoft Data Labs
(Please mark as answer if reply helps)


.NET Interviews & FAQs @ www.dotnetUncle.com



Search & Post Free Ads
8 Items, 1 Pages 1 |< << Go >> >|


Free Download:

Books:
Programming Microsoft ASP.NET Authors: Dino Esposito, Pages: 1165, Published: 2003
CHI 2006: Interact, Inform, Inspire : Conference Proceedings : Conference on Human Factors in Computing Systems : Montreal, Quebec, Canada, April 22-27 Authors: Rebecca Grinter, Pages: 2, Published: 2006
Pro C# 2008 and the .NET 3.5 Platform Authors: Andrew Troelsen, Pages: 1370, Published: 2007
Programming Microsoft Visual Basic 6.0: [master Object-oriented Programming Techniques for Rapid 32-bit Development] Authors: Francesco Balena, Pages: 1276, Published: 1999

Web:
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