Getting error when showing data in list view, please help me.....

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Getting error when showing data in list view, please help me.....
Error : Cannot add or insert the item '10-07-2018' in more than one place. You
must first remove it from its current location or clone it.
Parameter name: item
I use Vb.net 2010 visual basic
sql server 2008 r2
stored procedure
one listview

I want this type of structure (example)

VB

id     date              item_name         qty.          amount
1      1/1/2019            a               2             10
                           B               1             12
                           x               14            100
                           zz              4             52

2      4/1/2019            M               5             80
                           N               4             50

But when I showing to the data 1st item show on list view then getting the error.
It is possible please help me

What I have tried:

VB

With obj_S_J_RPT
    ListView1.Items.Clear()
    .Sdate = txtdtf.Text
    .EDate = txtdtt.Text
     dt1 = .GetStockJournalRPT()

    For i As Integer = 0 To dt1.Rows.Count - 1
        Dim dr As DataRow = dt1.Rows(i)

        Dim listitem As New ListViewItem(dr("SJDate").ToString())
        listitem.SubItems.Add(dr("itemnmsou").ToString())
        listitem.SubItems.Add(dr("SJqty").ToString())
        listitem.SubItems.Add(dr("SJPCS").ToString())
        listitem.SubItems.Add(dr("SJRate").ToString())
        listitem.SubItems.Add(dr("SJamt").ToString())
        listitem.SubItems.Add(dr("SJleft").ToString())
        listitem.SubItems.Add(dr("nrr").ToString())
        listitem.SubItems.Add(dr("SJID").ToString())

        Try
            With obj_S_J_RPT
                'ListView2.Items.Clear()
                .SJID = dr.Item(0)  'ListView1.Items(0).SubItems(8).Text
                dt2 = .GetStockJournalDetails() 'change

                For i1 As Integer = 0 To dt2.Rows.Count - 1
                    Dim dr1 As DataRow = dt2.Rows(i1)
                  Dim listitem_S As New
                   ListViewItem(dr1("itemnmDES").ToString())

                    listitem.SubItems.Add(dr1("itemnmDES").ToString())
                    listitem.SubItems.Add(dr1("SJdqty").ToString())
                    listitem.SubItems.Add(dr1("SJdPCS").ToString())
                    listitem.SubItems.Add(dr1("SJdRate").ToString())
                    listitem.SubItems.Add(dr1("SJdamt").ToString())
                    listitem.SubItems.Add(dr1("SJDstock").ToString())
                    listitem.SubItems.Add(dr1("SJid").ToString())
                    ListView1.Items.Add(listitem)

                Next i1
            End With
        Catch ex As Exception
            MsgBox(ex.Message, MsgBoxStyle.Critical)
        End Try

        ListView1.Items.Add(listitem)
    Next
End With

Posted 5-Jan-19 18:03pm

Jayanta Modak

Updated 6-Jan-19 18:46pm

v5

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RickZeeland · Answer 1 · 2019-01-05T22:47:00

You can not add an item with the same key multiple times, which you do in the line:

Dim listitem As New ListViewItem(dr("SJDate").ToString())

Instead try to use an unique field, maybe the SJID field, or a combination of fields that is unique.
Also try to catch the error before it occurs with:

ListView1.Items.ContainsKey(listitem.Name)

See example in C# here: https://www.c-sharpcorner.com/article/how-do-i-check-for-duplicate-items-in-a-listview/[^]
For VB.NET that would be:

If Not listView1.Items.ContainsKey(listitem.Name) Then
    listView1.Items.Add(listitem)
Else
    MessageBox.Show("Duplicate Item!")
End If

You can use this online converter to convert C# to VB.NET: Code Converter C# to VB and VB to C# – Telerik[^]

In your FOR loop you need to change listitem to listitem_S:

Dim listitem_S As New ListViewItem(dr1("itemnmDES").ToString())
                    listitem.SubItems.Add(dr1("itemnmDES").ToString())
                    listitem.SubItems.Add(dr1("SJdqty").ToString())
                    listitem.SubItems.Add(dr1("SJdPCS").ToString())
                    listitem.SubItems.Add(dr1("SJdRate").ToString())
                    listitem.SubItems.Add(dr1("SJdamt").ToString())
                    listitem.SubItems.Add(dr1("SJDstock").ToString())
                    listitem.SubItems.Add(dr1("SJid").ToString())
                    ListView1.Items.Add(listitem)