GridView控件的selectedIndex改不触发第一次点击 [英] Gridview selectedindex changed not firing on first click

问题描述

下面是我的code：

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

当我点击一排它被选中，但没有显示任何内容火灾和我的详细信息面板的第一次。当我点击了我第二次​​得到预期的结果。请你能告诉我怎么去解决这个问题呢？

When I click on a row for the first time it is selected but nothing fires and my details panel is not displayed. When I click for the second time I get the expected results. Please can you tell me how to get around this problem?

推荐答案

这是因为你在回传重新绑定。从您缠绕code Page_Load方法如下：

It's because you are rebinding on postback. Wrap the code from you Page_Load method as follows:

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，你​​改变DetailsPanel知名度出回传if语句的if语句。这是很难知道你想要做什么。

You might need to move the If statement where you change the DetailsPanel visibility out of the PostBack If statement. It's hard to know exactly what you want to do.

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