Removing items from a ListBox in VB net

Question

I have two ListBox1 and ListBox2  I have inserted items into a ListBox2 with the following code by selecting ListBox1 item   da6   New SqlDataAdapter  select distinct component type  from component where   component name     amp  ListBox1 SelectedItem    amp       con  da6 Fill ds6   component   For Each row As DataRow In ds6 Tables 0  Rows     ListBox2 Items Add row Field Of String   component type    Next   But when I reselect another item of ListBox1 then ListBox2 shows preloaded items and now loaded item together  I want only now loaded item to be displayed in listbox  I used this code but problem not solved   For i  0 To ListBox2 items count - 1     ListBox2 Items removeAt i  Next   OR listbox2 items clear   is also not working    How can I clear all items in the ListBox2

User · Answer

If you only want to clear the list box  you should use the Clear  winforms   wpf   asp net  method   ListBox2 Items Clear

User · Answer

Dim ca As Integer   ListBox1 Items Count   ToString     While Not ca   0         ca   ca - 1         ListBox1 Items RemoveAt ca      End While

User · Answer

This code worked for me   ListBox1 Items RemoveAt ListBox1 SelectedIndex

User · Answer

I think your ListBox already clear with ListBox2 Items Clear    The problem is that you also need to clear your dataset from previous results with ds6 Tables Clear     Add this in your code   da6   New SqlDataAdapter  select distinct component type  from component where   component name     amp  ListBox1 SelectedItem    amp       con      ListBox1 Items Clear        clears ListBox1     ListBox2 Items Clear        clears ListBox2     ds6 Tables Clear            clears DataSet   lt         DON T FORGET TO DO THIS da6 Fill ds6   component   For Each row As DataRow In ds6 Tables 0  Rows     ListBox2 Items Add row Field Of String   component type    Next

User · Answer

Already tested by me  it works fine  For i  0 To ListBox2 items count - 1 ListBox2 Items removeAt 0  Next

User · Answer

Here s the code I came up with to remove items selected by a user from a listbox It seems to work ok in a multiselect listbox  selectionmode prop is set to multiextended     Private Sub cmdRemoveList Click ByVal sender As Object  ByVal e As System EventArgs  Handles cmdRemoveList Click     Dim knt As Integer   lstwhatever SelectedIndices Count     Dim i As Integer     For i   0 To knt - 1         lstwhatever Items RemoveAt lstwhatever SelectedIndex      Next End Sub

User · Answer

This worked for me       Private Sub listbox MouseDoubleClick sender As Object  e As MouseEventArgs           Handles listbox MouseDoubleClick         listbox Items RemoveAt listbox SelectedIndex ToString        End Sub

User · Answer

Use simply   ListBox2 Items Clear      To take your last edit into account  Do that before you add the new items   MSDN  ListBox ObjectCollection Clear      Removes all items from the collection    Note that the problem with your approach is that RemoveAt changes the index of all remaining items      When you remove an item from the list  the indexes change for   subsequent items in the list  All information about the removed item   is deleted  You can use this method to remove a specific item from the   list by specifying the index of the item to remove from the list  To   specify the item to remove instead of the index to the item  use the   Remove method  To remove all items from the list  use the Clear   method    If you want to use RemoveAt anyway  you can go backwards  for example with   a for-loop   For i As Int32   ListBox2 Items Count To 0 Step -1     ListBox2 Items RemoveAt i  Next   or  a while  While ListBox2 Items Count  gt  0     ListBox2 Items RemoveAt ListBox2 Items Count - 1  End While   old C  code  for  int i   ListBox2 Items Count - 1  i  gt   0  i--      ListBox2 Items RemoveAt i    while ListBox2 Items Count  gt  0      ListBox2 Items RemoveAt ListBox2 Items Count - 1

User · Answer

There is a simple method for deleting selected items  and all these people are going for a hard method   lstYOURVARIABLE Items Remove lstYOURVARIABLE SelectedItem    I used this in Visual Basic mode on Visual Studio

[vb.net] Removing items from a ListBox in VB.net

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