Solved

WPF Listbox Scroll to Bottom VB.Net

Posted on 2010-11-08
2
1,013 Views
Last Modified: 2012-05-10
I am developing a WPF application that has a listbox.  In a standard windows form when I added an item to a listbox I could just use the TopIndex feature but that is not available in a WPF window.  

I have tried ScrollIntoView but I cannot get it to work.  Any help would be appreciated.

Thanks!
Public Sub UpdateStatus(ByVal s As String)
        Dim currDateTime As DateTime = DateTime.Now
        Dim sDateTime As String

        If (s <> gsLine) Then
            sDateTime = currDateTime.ToString("yyyyMMdd-HH:mm:ss> ")
        Else
            sDateTime = ""
        End If
        listStatus.BeginInit()
        listStatus.Items.Add(sDateTime + s)
        listStatus.ScrollIntoView(listStatus.Items.Count - 1)
        listStatus.EndInit()
    End Sub

Open in new window

0
Comment
Question by:MeritorWabco
2 Comments
 
LVL 85

Accepted Solution

by:
Mike Tomlinson earned 125 total points
ID: 34087492
I found this guys post and was able to get it to work using the code below:
http://www.developingfor.net/wpf/fun-with-the-wpf-scrollviewer.html

*I'm a WPF noob, though, so I don't really understand it yet.  There might even be a better approach but I have no idea...
    Public Sub UpdateStatus(ByVal s As String)
        Dim currDateTime As DateTime = DateTime.Now
        Dim sDateTime As String

        If (s <> gsLine) Then
            sDateTime = currDateTime.ToString("yyyyMMdd-HH:mm:ss> ")
        Else
            sDateTime = ""
        End If

        listStatus.Items.Add(sDateTime + s)
        Dim sv As ScrollViewer = FindScroll(listStatus)
        If Not IsNothing(sv) Then
            sv.ScrollToEnd()
        End If
    End Sub

    Private Function FindScroll(ByVal lb As ListBox) As ScrollViewer
        Dim scroll_border As Border = VisualTreeHelper.GetChild(lb, 0)
        If TypeOf scroll_border Is Border Then
            Dim scroll As ScrollViewer = scroll_border.Child
            If TypeOf scroll Is ScrollViewer Then
                Return scroll
            End If
        End If
        Return Nothing
    End Function

Open in new window

0
 

Author Comment

by:MeritorWabco
ID: 34087698
Yeah I am a WPF noob also :).  But i got it to work also.  I tried using the ScrollViewer several different ways and still couldn't get it to work. I guess I just don't know what I am doing and it is showing!
0

Featured Post

Networking for the Cloud Era

Join Microsoft and Riverbed for a discussion and demonstration of enhancements to SteelConnect:
-One-click orchestration and cloud connectivity in Azure environments
-Tight integration of SD-WAN and WAN optimization capabilities
-Scalability and resiliency equal to a data center

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
send messages to whatsapp programatically 2 65
Footer for each row on Gridview 2 33
Very Large data in MYSQL 7 73
Visual studio 2015 1 22
Parsing a CSV file is a task that we are confronted with regularly, and although there are a vast number of means to do this, as a newbie, the field can be confusing and the tools can seem complex. A simple solution to parsing a customized CSV fi…
It was really hard time for me to get the understanding of Delegates in C#. I went through many websites and articles but I found them very clumsy. After going through those sites, I noted down the points in a easy way so here I am sharing that unde…
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …

829 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question