问题,利用多线程解决界面卡死时,控件不能在新建的线程中访问。
解决方法,
可使用Invoke或BeginInvoke,在拥有此控件的基础窗口句柄的线程上执行指定的委托。
Invoke 方法 (Delegate):在拥有此控件的基础窗口句柄的线程上执行指定的委托;
BeginInvoke 方法 (Delegate):在创建控件的基础句柄所在线程上异步执行指定委托。
代码:
Public Class Form1 Private Delegate Sub AddLstItemDelegate(ByRef lst As ListBox,ByVal txt As String) Private Sub AddLstItemInvoke(ByRef lst As ListBox,ByVal txt As String) lst.Items.Add(txt) End Sub Private th As Threading.Thread Private Sub TaskTest() Dim i As Integer For i = 0 To 20 Threading.Thread.Sleep(1000) ListBox1.Invoke(New AddLstItemDelegate(AddressOf AddLstItemInvoke),New Object() {ListBox1,i.ToString}) Next End Sub Private Sub Button1_Click(sender As Object,e As EventArgs) Handles Button1.Click th = New Threading.Thread(AddressOf TaskTest) th.Start() End Sub End Class