?
Solved

How to select the newest item/row in a listview?

Posted on 2016-08-31
4
Medium Priority
?
73 Views
Last Modified: 2016-09-12
I am new at VB.net, and have inherited the code for an old desktop app in use at my company...

I have a ListView that users can "add" rows to by clicking an "add" button, which calls the code below.

Is there a way to programmatically select the row/item that the user just added?  Perhaps there's a way to get the index of the "ListViewItem" immediately after it is Dim'd, then point to that row after the .Items.Add ?
Thanks.
Dim itmCart = New ListViewItem(HeaderID.ToString())
itmCart.SubItems.Add(lsCartNumber)
itmCart.SubItems.Add(lsUserID)
lstCarts.Items.Add(itmCart)

Open in new window

0
Comment
Question by:Rob Rudloff
  • 2
4 Comments
 
LVL 41

Accepted Solution

by:
Kyle Abrahams earned 2000 total points
ID: 41778663
After you add the item it's always at the end so just set the selectedindex:

lstCarts.SelectedIndex = lstCarts.Items.Count() - 1

Open in new window

0
 
LVL 35

Expert Comment

by:it_saige
ID: 41778679
Use IndexOf; e.g. -

Form1.vb -
Public Class Form1
	Private Sub OnKeyUp(sender As Object, e As KeyEventArgs) Handles TextBox1.KeyUp
		If TypeOf sender Is TextBox Then
			Dim tb = DirectCast(sender, TextBox)
			If tb.Equals(TextBox1) Then
				If e.KeyData.Equals(Keys.Enter) AndAlso Not String.IsNullOrWhiteSpace(tb.Text) Then
					Dim item As New ListViewItem(tb.Text)
					ListView1.Items.Add(item)
					RichTextBox1.AppendText(String.Format("Added {0} to Listview at {1}{2}", item.Text, ListView1.Items.IndexOf(item), Environment.NewLine))
					tb.Clear()
				End If
			End If
		End If
	End Sub
End Class

Open in new window

Form1.Designer.vb -
<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial Class Form1
    Inherits System.Windows.Forms.Form

    'Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overrides Sub Dispose(ByVal disposing As Boolean)
        Try
            If disposing AndAlso components IsNot Nothing Then
                components.Dispose()
            End If
        Finally
            MyBase.Dispose(disposing)
        End Try
    End Sub

    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer

    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    <System.Diagnostics.DebuggerStepThrough()> _
    Private Sub InitializeComponent()
		Me.ListView1 = New System.Windows.Forms.ListView()
		Me.TextBox1 = New System.Windows.Forms.TextBox()
		Me.RichTextBox1 = New System.Windows.Forms.RichTextBox()
		Me.SuspendLayout()
		'
		'ListView1
		'
		Me.ListView1.Location = New System.Drawing.Point(13, 39)
		Me.ListView1.Name = "ListView1"
		Me.ListView1.Size = New System.Drawing.Size(259, 210)
		Me.ListView1.TabIndex = 0
		Me.ListView1.UseCompatibleStateImageBehavior = False
		'
		'TextBox1
		'
		Me.TextBox1.Location = New System.Drawing.Point(13, 13)
		Me.TextBox1.Name = "TextBox1"
		Me.TextBox1.Size = New System.Drawing.Size(259, 20)
		Me.TextBox1.TabIndex = 1
		'
		'RichTextBox1
		'
		Me.RichTextBox1.Location = New System.Drawing.Point(13, 256)
		Me.RichTextBox1.Name = "RichTextBox1"
		Me.RichTextBox1.ReadOnly = True
		Me.RichTextBox1.Size = New System.Drawing.Size(259, 96)
		Me.RichTextBox1.TabIndex = 2
		Me.RichTextBox1.Text = ""
		'
		'Form1
		'
		Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
		Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
		Me.ClientSize = New System.Drawing.Size(284, 363)
		Me.Controls.Add(Me.RichTextBox1)
		Me.Controls.Add(Me.TextBox1)
		Me.Controls.Add(Me.ListView1)
		Me.Name = "Form1"
		Me.Text = "Form1"
		Me.ResumeLayout(False)
		Me.PerformLayout()

	End Sub
	Friend WithEvents ListView1 As System.Windows.Forms.ListView
	Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
	Friend WithEvents RichTextBox1 As System.Windows.Forms.RichTextBox

End Class

Open in new window

Produces the following output -Capture.JPG
-saige-
0
 

Author Closing Comment

by:Rob Rudloff
ID: 41786474
Kyle --
Using that code, I got an error with the "[i]lstCarts.SelectedIndex =[/i]" part of the line:
     [i]Error 'SelectedIndex' is not a member of 'ListView'[/i]
So I looked at some of the other members of lstCarts, and did some reading and found that the ".Selected" property of an item will get or set the "selected" state.

So, using your note that the last item added has the highest index, I changed your line:
    [i] lstCarts.SelectedIndex = lstCarts.Items.Count() - 1[/i]
to
     [i]lstCarts.Items(lstCarts.Items.Count() - 1).Selected = True[/i]
and it works.

Next, I need to see how this all works when the listview is sorted.  I assume the index stays the same as the order it was added in ... Or perhaps the index changes when the items are sorted.

Thanks
0
 
LVL 41

Expert Comment

by:Kyle Abrahams
ID: 41786482
I believe you are correct in that the index will stay the same.  

You can use a combination of the sorting / sorted event to get what you need:
https://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.listview_events(v=vs.110).aspx

sorting you would save the selected item (or value)
sorted you would reset the selected item based on the one found in sorting.
0

Featured Post

The new generation of project management tools

With monday.com’s project management tool, you can see what everyone on your team is working in a single glance. Its intuitive dashboards are customizable, so you can create systems that work for you.

Question has a verified solution.

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

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…
Stellar Phoenix SQL Database Repair software easily fixes the suspect mode issue of SQL Server database. It is a simple process to bring the database from suspect mode to normal mode. Check out the video and fix the SQL database suspect mode problem.
Free Data Recovery software is an advanced solution from Kernel Tools to recover data and files such as documents, emails, database, media and pictures, etc. It supports recovery from physical & logical drive after a hard disk crash, accidental/inte…
Suggested Courses
Course of the Month3 days, 22 hours left to enroll

599 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