的GridView的selectedIndex變不成射擊第一次點擊

Question

這裏是我的代碼：

Protected Sub BookingsGV_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles BookingsGV.SelectedIndexChanged 
    BookingID = BookingsGV.SelectedValue 
    Dim query = From a In db.Approvers Where a.ApprovalStatus = False And a.BookingID = BookingID 
    Select a.ApproverEmail() 
    ApproverList.DataSource = query 
    ApproverList.DataBind() 
    EmailStatusLabel.Text = String.Empty 
End Sub 

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load 
    Dim query = From b In db.Bookings Where b.Approved = False And (From a In db.Approvers Where a.ApprovalStatus = False Select a.BookingID).Contains(b.BookingID) Select b.BookingID, b.DateRequired Distinct Order By DateRequired 
    BookingsGV.DataSource = query 
    BookingsGV.DataBind() 
    If ApproverList.Items.Count > 0 Then 
     DetailsPanel.Visible = True 
    Else 
     DetailsPanel.Visible = False 
    End If 
End Sub 

當我點擊一排它被選中，但沒有顯示任何火災和我的詳細信息面板中的第一次。當我第二次點擊時，我會得到預期的結果。請你能告訴我如何解決這個問題嗎？

Answer 1

這是因爲你正在重印回發。從您纏繞代碼Page_Load方法如下：

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load 
    If Not IsPostBack 
     Dim query = From b In db.Bookings Where b.Approved = False And (From a In db.Approvers Where a.ApprovalStatus = False Select a.BookingID).Contains(b.BookingID) Select b.BookingID, b.DateRequired Distinct Order By DateRequired 
     BookingsGV.DataSource = query 
     BookingsGV.DataBind() 
     If ApproverList.Items.Count > 0 Then 
      DetailsPanel.Visible = True 
     Else 
      DetailsPanel.Visible = False 
     End If 
    End If 
End Sub 

您可能需要移動，你改變DetailsPanel知名度出回傳的If語句If語句。很難確切知道你想要做什麼。