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Add Querystring to Sitemap that is in master Page

Posted on 2010-09-17
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Last Modified: 2013-11-27
I have a SiteMapPath in a Master Page:
<asp:SiteMapPath ID="SiteMapPath1" runat="server" PathSeparator=" &#187; " />
(i.e breadcrumb).

On one of my pages I need to append a querystring to the URL of the node immediately before the current node.  Any idea how I can do this.

Code behind is VB
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Question by:cgcmq
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LVL 41

Expert Comment

by:guru_sami
Comment Utility
haven't tried but see if you can manipulate item in ItemDataBound event like:

Protected Sub SiteMapPath1_ItemDataBound(sender As Object, e As SiteMapNodeItemEventArgs) Handles SiteMapPath1.ItemDataBound
      Dim s As String = e.Item.SiteMapNode.Url
End Sub
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Author Comment

by:cgcmq
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As the SiteMapPath is in the Master Page, SiteMaPath1 is not recognized (not declared) in the child page where I need to append the querystring.

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Expert Comment

by:guru_sami
Comment Utility
you do that in masterpage code-behind and not in childpage.
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Author Comment

by:cgcmq
Comment Utility
If I try to manipulate the URL of the SiteMap node in the master page, I would have to somehow pass the query string that is in the child page to the Master Page.  How would I do that?
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Expert Comment

by:guru_sami
Comment Utility
-->I would have to somehow pass the query string that is in the child page to the Master Page.
Did not get that part.
Do you mean the querystring from browser url?
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Author Comment

by:cgcmq
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The child page receives a query string:  childpage.aspx?name=bob

I need to append the query string to the URL of one of the nodes in the breadcrumb.  The problem is that the breadcrumb is in a master page.
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LVL 41

Expert Comment

by:guru_sami
Comment Utility
Then you simply access that in master page normally as you would do in childpage:
Request.QueryString["name"]
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Expert Comment

by:guru_sami
Comment Utility
oops ..VB :
Request.QueryString("name")
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Author Comment

by:cgcmq
Comment Utility
Okay.

I tried the following in the master page:

    Protected Sub SiteMapPath1_ItemDataBound(ByVal sender As Object, ByVal e As SiteMapNodeItemEventArgs) Handles SiteMapPath1.ItemDataBound
       Dim s As String = e.Item.SiteMapNode.Url
    End Sub

Unfortunately it returned an error: Object reference not set to an instance of an object.

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Expert Comment

by:guru_sami
Comment Utility
and did it point to this line: Dim s As String = e.Item.SiteMapNode.Url ??
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Author Comment

by:cgcmq
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Yes it did.
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guru_sami earned 500 total points
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Ok I tried a and see why you get that error, but I got another error because, Sitemap.Url is read-only.
So unfortunately, the way I proposed won't work, or might need more-time to make it work.

However, here I found this blog post which uses custom sitemapprovider to do this. Check it out and see if you can integrate it in your app:
http://weblogs.asp.net/jgaylord/archive/2008/06/04/adding-querystring-parameters-to-the-sitemapnode.aspx
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Author Comment

by:cgcmq
Comment Utility
Thanks for all the help.  I too am surprised that there is no built-in way of doing it.  I will see what luck I have following the instructions in the link.
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