AutoResetEvent如何在列表视图中写入
本文关键字:视图 列表 AutoResetEvent | 更新日期: 2023-09-27 18:22:14
如何在名为"LivStapaEventi"的listview上编写我会实时将事件写入事件日志窗口,我应该使用代理,如果是,你能告诉我如何使用吗?感谢大家
Private Shared signal As AutoResetEvent
Private Sub Form1_Load_1(sender As Object, e As EventArgs) Handles MyBase.Load
scelta = ""
Me.Thread = New Thread(New ThreadStart(AddressOf Me.Threaddammiora)) 'creo il thread
Me.Thread.Start() 'lancio il thread
width_rem = LivStampaEventi.Width
Height_rem = LivStampaEventi.Height
Dim remoteEventLogs() As EventLog
Dim log As EventLog
For Each log In remoteEventLogs
cmb_tutti_i_log.Items.Add(log.Log)
Next log
signal = New AutoResetEvent(False)
Dim myNewLog As New EventLog("PMIS_A2A", System.Environment.MachineName)
AddHandler myNewLog.EntryWritten, AddressOf Me.MyOnEntryWritten
myNewLog.EnableRaisingEvents = True
myNewLog.WriteEntry("PMIS_A2A", EventLogEntryType.Information)
signal.WaitOne()
End Sub
Public Sub MyOnEntryWritten(ByVal [source] As Object, ByVal e As EntryWrittenEventArgs)
Console.WriteLine("In event handler")
signal.Set()
Dim list As New List(Of String)
list.Clear()
list.Add(e.Entry.EventID.ToString())
list.Add(e.Entry.Message.ToString())
list.Add(e.Entry.EntryType.ToString())
list.Add(e.Entry.TimeWritten.ToString())
list.Add(e.Entry.TimeGenerated.ToString())
list.Add(e.Entry.Index.ToString())
LivStampaEventi.Items.Add(New ListViewItem(list.ToArray))
If (e.Entry.EntryType.ToString = "Warning") Then
LivStampaEventi.Items(LivStampaEventi.Items.Count - 1).BackColor = Color.Yellow
Else
If (e.Entry.EntryType.ToString = "Error") Then
LivStampaEventi.Items(LivStampaEventi.Items.Count - 1).BackColor = Color.Red
Else
LivStampaEventi.Items(LivStampaEventi.Items.Count - 1).BackColor = Color.Green
End If
End If
End Sub ' MyOnEntryWritten
您似乎正试图从非UI线程设置list
属性,这会导致出现异常。您引用的MSDN链接提供了一个解决方案:在MyOnEntryWritten中,测试InvokeRequired
If list.InvokeRequired then // true if not in the UI thread
list.Invoke(...) // use a delegate for MyOnEntryWritten
Else
// the actual code
End If
要为Invoke创建参数,请检查链接