如何使用数据源在列表框中添加或删除项目 [英] how to add or remove items from and to listbox with the use of datasource

问题描述

我有两个名为listbox1和listbox2的列表框.
有四个按钮，< ,<<, >, >>

在listbox1中，我填充名为partymas的表中的数据，该表的列partyname和partyid.

当我从listbox1中选择多个项目，然后单击button1(<)时，所有选中的项目将从listbox1中删除，并添加到listbox2中.

请帮我怎么做

从OP的答案移至:

I have two listbox named listbox1 and listbox2
There are four buttons, < ,<<, >, >>

In listbox1 I fill up the data from table named partymas which has columns partyname and partyid.

When I select multiple items from listbox1 and then click on button1(<) then all the selected items are removed from the listbox1 and added into listbox2.

Please help me how can do this

Moved from OP''s answer:

Imports System.Data.SQLite
Imports ComponentFactory.Krypton.Toolkit
Public Class frm_listbox
    Dim sqlconnect As New SQLiteConnection("Data Source=|datadirectory|\abcpayment;" & "version = 3;")
    Dim mydataset2 As Data.DataSet
    Dim mydataset As Data.DataSet
    Public Function listone()
        Dim sqlcommand As New SQLiteCommand("select partyid,partyname from partymas", sqlconnect)
        Dim mydata_adapter As New SQLiteDataAdapter(sqlcommand)
        Dim mydataset0 As New DataSet
        mydata_adapter.Fill(mydataset0)
        lst_left.DataSource = mydataset0.Tables(0)
        lst_left.DisplayMember = "partyname"
        lst_left.ValueMember = "partyid"
        mydataset = mydataset0.Copy()
        mydataset2 = mydataset0.Clone()
        lst_right.DataSource = mydataset2.Tables(0)
        lst_right.DisplayMember = "partyname"
        lst_right.ValueMember = "partyid"
        'MessageBox.Show(mydataset2.Tables(0).Rows(0)(1).ToString)
        Return 0
    End Function
    Public Function moveright()
        Dim str(lst_left.SelectedItems.Count - 1) As String
        Dim g As Integer = 0
        Dim i As Integer
        Dim j As Integer
        Dim k As Integer
        For k = 0 To lst_left.Items.Count - 1
        If (lst_left.GetSelected(k)) Then
        str(g) = lst_left.GetItemText(lst_left.Items(k))
        g = g + 1
        End If
        Next
        For j = 0 To str.Length - 1
        For i = 0 To mydataset.Tables(0).Rows.Count - 1
        If (str(j) = mydataset.Tables(0).Rows(i)(1).ToString) Then
        Dim objrow As System.Data.DataRow = mydataset.Tables(0).Rows(i)
        mydataset2.Tables(0).ImportRow(objrow)
        mydataset.Tables(0).Rows(i).Delete()
        mydataset.Tables(0).Rows(i).AcceptChanges()
        Exit For
        End If
        Next
        Next
        lst_right.DataSource = mydataset2.Tables(0)
        lst_left.DataSource = mydataset.Tables(0)

        Return 0
    End Function
    Public Function moverightall()
        Dim str(lst_left.Items.Count - 1) As String
        Dim g As Integer = 0
        Dim i As Integer
        Dim j As Integer
        Dim k As Integer
        For k = 0 To lst_left.Items.Count - 1
        str(g) = lst_left.GetItemText(lst_left.Items(k))
        g = g + 1
        Next
        For j = 0 To str.Length - 1
        For i = 0 To mydataset.Tables(0).Rows.Count - 1
        If (str(j) = mydataset.Tables(0).Rows(i)(1).ToString) Then
        Dim objrow As System.Data.DataRow = mydataset.Tables(0).Rows(i)
        mydataset2.Tables(0).ImportRow(objrow)
        mydataset.Tables(0).Rows(i).Delete()
        mydataset.Tables(0).Rows(i).AcceptChanges()
        Exit For
        End If
        Next
        Next
        lst_right.DataSource = mydataset2.Tables(0)
        lst_left.DataSource = mydataset.Tables(0)
        Return 0
    End Function
    Public Function moveleft()
        Dim str(lst_right.SelectedItems.Count - 1) As String
        Dim g As Integer = 0
        Dim i As Integer
        Dim j As Integer
        Dim k As Integer
        For k = 0 To lst_right.Items.Count - 1
        If (lst_right.GetSelected(k)) Then
        str(g) = lst_right.GetItemText(lst_right.Items(k))
        g = g + 1
        End If
        Next
        For j = 0 To str.Length - 1
        For i = 0 To mydataset2.Tables(0).Rows.Count - 1
        If (str(j) = mydataset2.Tables(0).Rows(i)(1).ToString) Then
        Dim objrow As System.Data.DataRow = mydataset2.Tables(0).Rows(i)
        mydataset.Tables(0).ImportRow(objrow)
        mydataset2.Tables(0).Rows(i).Delete()
        mydataset2.Tables(0).Rows(i).AcceptChanges()
        Exit For
        End If
        Next
        Next
        lst_right.DataSource = mydataset2.Tables(0)
        lst_left.DataSource = mydataset.Tables(0)
        Return 0
    End Function
    Public Function moveleftall()
        Dim str(lst_right.Items.Count - 1) As String
        Dim g As Integer = 0
        Dim i As Integer
        Dim j As Integer
        Dim k As Integer
        For k = 0 To lst_right.Items.Count - 1
        str(g) = lst_right.GetItemText(lst_right.Items(k))
        g = g + 1
        Next
        For j = 0 To str.Length - 1
        For i = 0 To mydataset2.Tables(0).Rows.Count - 1
        If (str(j) = mydataset2.Tables(0).Rows(i)(1).ToString) Then
        Dim objrow As System.Data.DataRow = mydataset2.Tables(0).Rows(i)
        mydataset.Tables(0).ImportRow(objrow)
        mydataset2.Tables(0).Rows(i).Delete()
        mydataset2.Tables(0).Rows(i).AcceptChanges()
        Exit For
        End If
        Next
        Next
        lst_right.DataSource = mydataset2.Tables(0)
        lst_left.DataSource = mydataset.Tables(0)
        Return 0
    End Function
    Private Sub frm_listbox_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        listone()
        btn_allshiftleft.Enabled = False
        btn_shiftleft.Enabled = False
        btn_shiftright.Enabled = False
        lst_left.SelectedIndex = -1
    End Sub
    Private Sub btn_exit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_exit.Click
        Me.Close()
    End Sub
    Private Sub btn_shiftright_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_shiftright.Click
        moveright()
        lst_right.SelectedIndex = -1
        lst_left.SelectedIndex = -1
    End Sub
    Private Sub btn_allshiftright_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_allshiftright.Click
        moverightall()
        lst_right.SelectedIndex = -1
    End Sub
    Private Sub btn_shiftleft_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_shiftleft.Click
        moveleft()
        lst_left.SelectedIndex = -1
        lst_right.SelectedIndex = -1
        End Sub
        Private Sub btn_allshiftleft_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_allshiftleft.Click
        moveleftall()
        lst_left.SelectedIndex = -1
        'btn_allshiftright.Enabled = True
        'btn_allshiftleft.Enabled = False
    End Sub
    'Private Sub lst_right_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles lst_right.KeyDown
    ' MsgBox(lst_right.SelectedIndex)
    'End Sub
    Private Sub lst_left_MouseClick(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles lst_left.MouseClick
        MsgBox(lst_left.SelectedIndex)
    End Sub
    Private Sub lst_left_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lst_left.SelectedIndexChanged
        If lst_left.SelectedItems.Count >= 0 Then
        btn_shiftright.Enabled = True
        btn_allshiftleft.Enabled = False
        btn_allshiftright.Enabled = False
        btn_shiftleft.Enabled = False
        End If
        If lst_left.SelectedItems.Count = lst_left.Items.Count Or lst_left.SelectedItems.Count = lst_left.Items.Count - lst_right.Items.Count Or lst_left.SelectedIndex = -1 Then
        btn_allshiftright.Enabled = True
        btn_allshiftleft.Enabled = False
        btn_shiftleft.Enabled = False
        btn_shiftright.Enabled = False
        End If
    End Sub
    Private Sub lst_right_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lst_right.SelectedIndexChanged
        If lst_right.SelectedItems.Count >= 0 Then
        btn_shiftleft.Enabled = True
        btn_allshiftleft.Enabled = False
        btn_allshiftright.Enabled = False
        btn_shiftright.Enabled = False
        End If
        If lst_right.SelectedItems.Count = lst_right.Items.Count Or lst_right.SelectedItems.Count = lst_right.Items.Count - lst_left.Items.Count Or lst_right.SelectedIndex = -1 Then
        btn_allshiftleft.Enabled = True
        btn_allshiftright.Enabled = False
        btn_shiftleft.Enabled = False
        btn_shiftright.Enabled = False
        End If
    End Sub
End Class

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This Link-[Working with Listbox in Asp.net in vb.net][^] might help you to learn how to add Item in listbox and move it from one to another listbox

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