Solved

LISTVIEW nightmare with VB2005

Posted on 2006-06-12
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Last Modified: 2011-09-20
Experts,

I am in desperate need of your assistance.  I have pulled just about all of my hair out trying to get this listview to work.  My project goal is to fill the listview from a database and then fill a textbox with the checked value of the listview.  Below is my code:

    Private Sub TESTING_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        Dim conn2 As New System.Data.SqlClient.SqlConnection("Persist Security Info=True;Server=127.0.0.1;Database=Reporting;uid=sa;network=dbmssocn;password=******")
        Dim da2 As New System.Data.SqlClient.SqlDataAdapter("Select * from tblPeople", conn2)
        Dim ds2 As New System.Data.DataSet
        Dim cmd As New System.Data.SqlClient.SqlCommand("SELECT * from tbldrug where arn='" & OffenseIncidentEdit.AgencyReportNumber.Text & "' and Incident_ID='" & OffenseIncidentEdit.Incident_ID.Text & "' and deleted='0' order by dateentered", conn2)
       
        Try
            conn2.Open()
            Dim myReader As SqlDataReader = cmd.ExecuteReader()

            Do While myReader.Read()


                Dim lvi As New ListViewItem(myReader.Item("Activity").ToString)                 ' This works as far as populating the listview
                lvi.SubItems.Add(myReader.Item("Type").ToString())                                  ' This works as far as populating the listview
                lvi.SubItems.Add(myReader.Item("Description").ToString())                         ' This works as far as populating the listview
                lvi.SubItems.Add(myReader.Item("drug_id").ToString())                              ' This works as far as populating the listview (I need this value to populate textbox1 when the selected item is clicked)
                ListView1.Items.Add(lvi)

            Loop

             myReader.Close()

        Catch ex As Exception
            MessageBox.Show(ex.Message)
        Finally

        End Try
        conn2.Close()

    End Sub

My goal is to on click, fill textbox1.text with the selected value "DRUG_ID"

Please help
0
Comment
Question by:NCSO
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9 Comments
 

Author Comment

by:NCSO
ID: 16888312
AM I missing the SelectedListViewItemCollection Class?  I am at a lose!
0
 
LVL 9

Expert Comment

by:dancebert
ID: 16888507
You will probably get better answers if you post this question in the VB.NET area.
0
 
LVL 18

Expert Comment

by:Ravi Singh
ID: 16888513
Hi, you'll need to handle the "SelectedIndexChanged" event for the ListView control. Do this by selecting the ListView in design view, in the properties pane select the icon which has a lightning bolt graphic, double click the event named SelectedIndexChanged. This should take you into the code editor and should automatically generate the event handling procedure. In the end you should have something like:

    Private Sub ListView1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ListView1.SelectedIndexChanged

        Me.TextBox1.Text = Me.ListView1.FocusedItem.SubItems(3).Text
    End Sub

The literal value 3 is the column index...

Hope this helps!
0
 

Author Comment

by:NCSO
ID: 16888651
Zephyr,

When I click the checkbox, nothing happens.
0
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Author Comment

by:NCSO
ID: 16888749
if I put it "on leave" or "item checked" it show the first indexed return and no other
0
 

Author Comment

by:NCSO
ID: 16888843
it is as if the focused item is always the first return
0
 
LVL 18

Accepted Solution

by:
Ravi Singh earned 500 total points
ID: 16888900
Hi, sorry, use the ItemChecked event instead, try something like:

    Private Sub ListView1_ItemChecked(ByVal sender As System.Object, ByVal e As System.Windows.Forms.ItemCheckedEventArgs) Handles ListView1.ItemChecked

        If Me.ListView1.CheckedItems.Count > 0 Then

            Dim CheckedItem As ListViewItem = Me.ListView1.CheckedItems(0)
            Me.TextBox1.Text = CheckedItem.SubItems(3).Text
        End If
    End Sub

If multiple checkboxes are checked, only the first one checked will be displayed in the textbox, if you want all the items that are checked to be displayed in one textbox then you'll have to iterate the ListView1.CheckedItems collection (using a ForEach loop) and concatenate the string values in the textbox.
0
 

Author Comment

by:NCSO
ID: 16888921
I changed the listview to full row select and it now works but I get the following error when I select a different row:

Object reference not set to an instance of an object.
0
 

Author Comment

by:NCSO
ID: 16888974
THANK YOU VERRRRRY MUCH!
0

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