Reports

Keep in mind that the MaintainScrollPositionOnPostback is to be placed/used in the @Page directive, not in the GridView.

Also, a hyperlink technicalliy not really a post-back. You can of course use a "regular" button in a GV such as say this example GV in which I have a row edit:

    <asp:GridView ID="GHotels" runat="server" AutoGenerateColumns="False" 
        DataKeyNames="ID" Width="50%"
        CssClass="table table-hover table-striped"
        >
        <Columns>
            <asp:BoundField DataField="FirstName" HeaderText="FirstName"  />
            <asp:BoundField DataField="LastName" HeaderText="LastName"    />
            <asp:BoundField DataField="HotelName" HeaderText="HotelName"  />
            <asp:TemplateField HeaderText="Active" ItemStyle-HorizontalAlign="Center">
                <ItemTemplate>
                    <asp:CheckBox ID="chkActive" runat="server" 
                        Checked='<%# Eval("Active") %>' />
                </ItemTemplate>
            </asp:TemplateField>
            <asp:BoundField DataField="Description" HeaderText="Description"  />
            <asp:TemplateField HeaderText="Hotel Information" ItemStyle-HorizontalAlign="Center">
                <ItemTemplate>
                    <asp:Button ID="cmdView" runat="server" Text="Edit"
                        OnClick="cmdView_Click" CssClass="btn" />
                </ItemTemplate>
            </asp:TemplateField>
        </Columns>
    </asp:GridView>

So, in place of a hyper-link button, I just used a standard asp.net button.

The code behind that picks up the current row click is thus this:


    Protected Sub cmdView_Click(sender As Object, e As EventArgs)

        ' Row click - get hotel informaton, fill out the pop div
        Dim btn As Button = sender
        Dim gRow As GridViewRow = btn.NamingContainer
        Dim intPK As Integer = GHotels.DataKeys(gRow.RowIndex).Item("ID")

        Dim rstData As DataTable
        rstData = MyRst($"SELECT * FROM tblHotelsA WHERE ID = {intPK}")

        Call fLoader(HotelInfo, rstData.Rows(0)) ' Load up conrols in div

        ' call our js pop function.
        Dim strHotelName = $"Edit Information for {rstData.Rows(0).Item("HotelName")}"
        Dim strJavaScript As String =
            $"popinfo('{btn.ClientID}','{strHotelName}');"

        ScriptManager.RegisterStartupScript(Page, Page.GetType, "mypop", strJavaScript, True)


    End Sub

Note the use of NamingContainer - that allows you to pick up the current row. Combined with the page direction, say like this:

        <%@ Page Language="vb" AutoEventWireup="false" 
            CodeBehind="HotelInfoPop.aspx.vb" 
            Inherits="MyCalendar.HotelInfoPop"
            MaintainScrollPositionOnPostback="true"
            %>

So, above does return scroll position on post-back.

So, we might need more markup, since the above does maintain the current screen scroll position. Perhaps a update panel is involved here?

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