Question

这是我的代码：

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

当我第一次单击某一行时，它会被选中，但不会触发任何内容，并且不会显示我的详细信息面板。当我第二次点击时，我得到了预期的结果。请问您能告诉我如何解决这个问题吗？

Answer 1

这是因为你在回发时重新绑定。从您的Page_Load方法中包装代码如下：

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

您可能需要移动If语句，在其中将DetailsPanel可见性更改为PostBack If语句。很难确切地知道你想做什么。

Gridview selectedindex在第一次单击时未更改

1 个答案: