如何将checkedlistbox中的选中项目添加到combobox [英] How to adding checked item from checkedlistbox to combobox

问题描述

我想将checkedlistbox中的选中项目添加到我的组合框，但我有一个小问题。 Combobox仅显示上次选中的1项。
这是我的示例代码。

 如果CheckedListBox1.CheckedItems.Count& 0 Then 
 For i As Integer = 0到CheckedListBox1.CheckedItems.Count  -  1 
 cbCheckedItem.Text = CheckedListBox1.CheckedItems（i）.ToString 
 Next i 
结束如果
  

任何人都可以帮助我显示所有选中的项目？
谢谢您的帮助...

解决方案

奇怪的是，CheckedListBox有一个CheckedItems属性，它是一个集合。因此，你可以循环通过它像任何其他集合，使用For或For Each循环。

然后，每个项目需要添加到Items集合

  Public Class frmCheckedListBox 
 
 Private Sub frmCheckedListBox_Load（ByVal sender As System.Object，ByVal e As System.EventArgs）句柄MyBase.Load 
 Me.CheckedListBox1.Items.Clear（）
 Me.CheckedListBox1。 
 Me.CheckedListBox1.Items.Add（One）
 Me.CheckedListBox1.Items.Add（Two）
 Me.CheckedListBox1.Items.Add（Three ）
 Me.CheckedListBox1.Items.Add（Four）
 Me.CheckedListBox1.Items.Add（Five）
 Me.CheckedListBox1.EndUpdate（）
 End Sub 
 
 Private Sub Button1_Click（ByVal sender As System.Object，ByVal e As System.EventArgs）句柄Button1.Click 
每个项目作为字符串在Me.CheckedListBox1.CheckedItems 
 Me .ComboBox1.Items.Add（Item）
 Me.ComboBox1.SelectedIndex = 0 
 Next 
 End Sub 
  

结束类

如示例代码所示，CheckedItems集合包含被检查的项目，正如名称所暗示的。它不包含每个项目的布尔值，以指示它是否被选中。如果一个项目被选中，那么该项目在CheckedItems中，如果它不是，那么它不是。你只需要循环遍历集合，并获取其中的每个项目，因为它包含所有被检查的项目，没有不是。

可以：

  Me.Combobox1.items.clear（）
  

因为当它用示例代码点击时，会有一个点击然后在下一次点击将返回上一个点击，然后新的一个所有编译在组合框选择菜单

也许我的答案可以帮助你解决你的问题

I want to adding checked item from checkedlistbox to my combobox, but i have a little problem here. Combobox only show 1 item last checked. This is my sample code.

    If CheckedListBox1.CheckedItems.Count <> 0 Then
        For i As Integer = 0 To CheckedListBox1.CheckedItems.Count - 1
            cbCheckedItem.Text = CheckedListBox1.CheckedItems(i).ToString
        Next i
    End If

anyone can help me show all checked item?? thank's for your help...

解决方案

Oddly enough the CheckedListBox has a CheckedItems property, which is a collection. As such you can loop through it like you can any other collection, using a For or For Each loop.

then, Each item needs to be added to the Items collection of the ComboBox.

like this sample:

Public Class frmCheckedListBox

Private Sub frmCheckedListBox_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    Me.CheckedListBox1.Items.Clear()
    Me.CheckedListBox1.BeginUpdate()
    Me.CheckedListBox1.Items.Add("One")
    Me.CheckedListBox1.Items.Add("Two")
    Me.CheckedListBox1.Items.Add("Three")
    Me.CheckedListBox1.Items.Add("Four")
    Me.CheckedListBox1.Items.Add("Five")
    Me.CheckedListBox1.EndUpdate()
End Sub

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
    For Each Item As String In Me.CheckedListBox1.CheckedItems
        Me.ComboBox1.Items.Add(Item)
        Me.ComboBox1.SelectedIndex = 0
    Next
End Sub

End Class

As sample code shows, the CheckedItems collection contains the items that are checked, just as the name suggests. It doesn't contain a Boolean value for each an every item to indicate whether it is checked or not. If an item is checked then that item is in the CheckedItems, and if it isn't then it isn't. You simply need to loop through the collection and get every item in it, because it contains all the items that are checked and none that aren't.

in the end you can put :

Me.Combobox1.items.clear()

because when it would click with sample code it would have the one that clicked then on the next click would return the previous one it had clicked and then the new one all compiled in the combobox selection menu

perhaps my answer can help you solve your problems

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