我试图以编程方式向表单添加未指定数量的新UserControls。每次在UserControl中包含的组合框中选择一个条目时,都会添加一个。VB.NET:SelectedIndexChanged多次触发
问题是,SelectedIndexChanged事件触发完全不正常。有时两次,有时三次等,但从来没有一次。无论将组合框的SelectedIndex设置为-1多少次,其SelectedIndex为0时都会触发至少一次。有时,ItemSelected事件会在SelectedIndexChanged事件之间触发多次。
InvoiceEntry.vb片段:
Public Event ItemSelected As EventHandler
Private Sub cboItem_SelectedIndexChanged(sender As System.Object, _
e As System.EventArgs) Handles cboItem.SelectedIndexChanged
RaiseEvent ItemSelected(Me, EventArgs.Empty)
End Sub
Invoice.vb片段:
Private numEntries As Integer = 1
Public Sub invEntry1_ItemSelected() Handles invEntry1.ItemSelected
numEntries += 1
Dim newEntry As InvoiceEntry = invEntry1
Dim pt As Point = newEntry.Location
pt.Y += 30
newEntry.Location = pt
newEntry.Name = "invEntry" + numEntries.ToString
pnlEntries.Controls.Add(newEntry)
末次
我在一个完全丧失,什么是错的。请让我知道你是否需要更多的信息,因为我会监控这个线程,直到我或其他人知道。
即* *究竟什么我一直在寻找!这个问题在过去困扰过我很多次,我从来没有找到合适的解决方案。先生,你是英雄。 – 2012-04-28 20:58:01