Question

Possible to grab html attributes from linkbutton in click event?

Asked by: KMPrenger

Hi Everyone!  Thanks for your help!
Little info to get you started: On our website, we currently have forms and brochures pages for people to download.  (Example: https://www.mosers.org/Members/Forms.aspx).  Currently, these are written out programatically by reading a content management system (basically a database), looping through the items, writing out their values and adding <li> tags around each.  I want to add tracking to these forms so we can see usage.  I plan to write the form name, among other information to an MS SQL database.

To try and accomplish this, I'm writing these links out instead as asp linkbuttons so that when they are clicked I can raise an event to write the tracking data to the db.  Again I'm looping through the items, assigning the item's title to the linkbutton.text property.   Next is where it gets tough (at least for me!)

At first, to make the links work, I assigned the item's path (address) to the linkbuttons href attribute.  But when I do that, yes the link then works, but I get no click event.   The event never gets raised.

So then I've tried leaving the href attribute alone and just assigning the path to another attribute of the linkbutton.  For instance, Ive done " Link.Attributes.Add("title", path).  Now when the linkbutton is clicked the event is raised, but I'm stuck there because I can't grab the associated path (url) I need from the linkbutton I just clicked.   I'd like to somehow grab the title and path from whatever link I'm clicking on, but I get nothing.  Is this possible?

Here's a simple example of what I'm doing:

'Loops through links and write them out in <ol><li> tags
            output.Write("<ol>")
                If (multiselectfield Is Nothing) Then
                    'output.Write("Error finding Forms")
                Else
                    Dim items() As Sitecore.Data.Items.Item = multiselectfield.GetItems
                    If ((Not (items) Is Nothing) AndAlso (items.Length > 0)) Then
                        Dim i As Integer = 0
                        Dim path As String
                        Do While (i < items.Length)
                                path = Sitecore.Links.LinkManager.GetItemUrl(items(i))
                                output.Write("<li>")
                                        Link.Text = FieldRenderer.Render(items(i), "Title")
                                        Link.Attributes.Add("alt", path)
                                        Link.Attributes.Add("title", FieldRenderer.Render(items(i), "Title"))
                                        Link.RenderControl(output)
                                output.Write("</li>")
                            output.WriteLine()
                            i = (i + 1)
                        Loop
                    End If
                End If
            output.Write("</ol>")

'Linkbutton click event (raised from each linkbutton)
Protected Sub Link_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Link.Click
    Dim text As String
    text = Link.Attributes("title")
End Sub
 

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Asked On
2009-11-05 at 12:12:43ID24875889
Tags

ASP.net

,

linkbutton

Topics

Programming for ASP.NET

,

.NET Framework 3.x versions

,

Microsoft Visual Basic.Net

Participating Experts
2
Points
250
Comments
6

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Answers

 

by: thrill_housePosted on 2009-11-05 at 12:39:35ID: 25753752

Could you set the CommandArgument to the path on the linkbutton?  (Link.CommandArgument =  path)

Then on the event, just grab the CommandArgument, and  then do the redirect.

 

by: KMPrengerPosted on 2009-11-05 at 12:57:39ID: 25753927

I added the "Link.CommandArgument = path" to the read loop and then added "Response.Redirect(Link.CommandArgument)" to the Link_Click but when it redirects I get page not found.

When I debug the click, it shows that the link.commandargument is getting no value.  Comes up as " ".

On a side note, I'm open to any other suggestions on ways of doing this.  I tried a listbox before, and it functioned correctly, but did not look at all like we would like because I couldn't find any possible ways to increase the row size or wrap text within the listbox since it ran out of the display area.

 

by: CodeCruiserPosted on 2009-11-06 at 02:39:57ID: 25757995

I am not sure about your scenario but the way i do it is i have a table called Redirections. When generating the links, i generate a GUID and save that to the DB with the actual URL. I then generate the URL for the link to be Redirect.aspx?ID=theguid. When the user clicks on the button, Redirect.aspx is called with the ID, that page records the click and then redirects to the URL stored in the DB.

 

by: KMPrengerPosted on 2009-11-06 at 06:41:25ID: 25759452

CodeCruiser... I didn't use your exact example, but you gave me the idea and I ran with it.  When the user clicks a link, they will be taken to a form_redirect.aspx page with a few parameters in the url.  On the redirect page, i grab the parameters, then call my module which writes to the db, and finally I redirect them to the appropriate pdf url that was grabbed from one of the url parameters.

Thanks!

 

by: KMPrengerPosted on 2009-11-06 at 06:43:27ID: 31650697

User gave me an idea which lead to me creating my own solution.  See my final post for the actual solution.  Thanks CodeCruiser!

 

by: CodeCruiserPosted on 2009-11-06 at 06:44:59ID: 25759480

Glad to help.

20120131-EE-VQP-002

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