如何在不丢失所选项目的情况下刷新listview？ [英] How to refresh listview without loosing selected item?

问题描述

如何在不丢失所选项目的情况下刷新listview？

How to refresh listview without loosing selected item?

我搜索了谷歌但没有运气...... :(



我在visual studio 2005（vb.net）中创建了一个类似应用程序的进程浏览器

当我点击刷新按钮时选择已经消失，现在我不知道如何保持所选项目，即使我点击刷新按钮

这里是我的listview代码：



'列出列表视图中的所有进程

I have searched google but no luck.... :(

I am creating a process explorer like application in visual studio 2005 (vb.net)
and when i click the refresh button my current selected is gone, now i dont know how to keep the selected item even i click the refresh button
here is my code for the listview:

'list all processes in to a listview

Private Sub ListProcesses()
      Dim ps() As Process
      Try
          ps = Process.GetProcesses()
          lvProcesses.BeginUpdate()
          lvProcesses.Clear()
          lvProcesses.Columns.Add("Name", 100, HorizontalAlignment.Left)
          lvProcesses.Columns.Add("ID", 60, HorizontalAlignment.Left)
          lvProcesses.Columns.Add("Priority", 60, HorizontalAlignment.Right)
          lvProcesses.Columns.Add("Memory(bytes)", 100, HorizontalAlignment.Right)
          Dim p As Process
          For Each p In ps
              Dim lvi As ListViewItem = New ListViewItem()
              lvi.Text = p.ProcessName
              lvi.SubItems.Add(p.Id.ToString())
              lvi.SubItems.Add(p.BasePriority.ToString())
              lvi.SubItems.Add(p.WorkingSet64.ToString())
              lvProcesses.Items.Add(lvi)
          Next p
          lvProcesses.EndUpdate()
      Catch e As Exception
          MessageBox.Show(e.Message)
      End Try
  End Sub

'shreshbtn

'refreshbtn

ListProcesses()

Dim selectedit As String
selectedit = lvProcesses.SelectedItems(0).Text
Me.lvProcesses.Items(selectedit).Selected = True

'listvi ew

'所选项目@ listview

'listview
'selected item @ listview

lvProcesses.SelectedItems(0).SubItems(0).Text

列表视图列表代码的来源：

source of the listview list code:

<a href="http://www.java2s.com/Tutorial/VB/0140__Development/ListallprocessinaListView.htm">http://www.java2s.com/Tutorial/VB/0140__Development/ListallprocessinaListView.htm</a>[<a href="http://www.java2s.com/Tutorial/VB/0140__Development/ListallprocessinaListView.htm" target="_blank" title="New Window">^</a>]

谢谢！

任何帮助将不胜感激！ :) :) :) :) :)

Thank You!
Any help will be appreciated! :) :) :) :) :)

推荐答案

参考 this [ ^ ]并阅读整个对话。



希望有帮助:)

Refer this [^]and read the whole conversation.

hope it helps :)

从你的问题来看，我看不出你的刷新到底是什么。不管;基本上，你只需要在刷新前记住选择并在刷新后设置它。如果您在选择之前插入或删除任何项目，您应该考虑它并相应地选择行的索引。

-SA

From your question, I cannot see what exactly your refresh does. No matter; basically, you simply need to remember selection before refresh and set it after refresh. If you insert or delete any items before selection, you should take it into account and shift the index of a row to be selected accordingly.

—SA

试试这个



Dim selectedit As Integer

selectedit = lvProcesses.FocusedItem。索引



ListProcesses（）



lvProcesses.Items.Item（selectedit）.Focused = True

lvProcesses.Items.Item（selectedit）.Selected = True



Bruno。

Try this

Dim selectedit As Integer
selectedit = lvProcesses.FocusedItem.Index

ListProcesses()

lvProcesses.Items.Item(selectedit).Focused = True
lvProcesses.Items.Item(selectedit).Selected = True

Bruno.

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