我試圖以編程方式向表單添加未指定數量的新UserControls。每次在UserControl中包含的組合框中選擇一個條目時,都會添加一個。VB.NET:SelectedIndexChanged多次觸發
問題是,SelectedIndexChanged事件觸發完全不正常。有時兩次,有時三次等,但從來沒有一次。無論將組合框的SelectedIndex設置爲-1多少次,其SelectedIndex爲0時都會觸發至少一次。有時,ItemSelected事件會在SelectedIndexChanged事件之間觸發多次。
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
我在一個完全喪失,什麼是錯的。請讓我知道你是否需要更多的信息,因爲我會監控這個線程,直到我或其他人知道。
即* *究竟什麼我一直在尋找!這個問題在過去困擾過我很多次,我從來沒有找到合適的解決方案。先生,你是英雄。 – 2012-04-28 20:58:01