ASP.NET UpdatePanelAnimationExtender print problem
I'm having problems printing in ASP.NET when using an UpdatePanel and UpdatePanelAnimationExtender. I am filtering content in a Repeater which is ins开发者_StackOverflow中文版ide an UpdatePanel with an UpdatePanelAnimationExtender attached to add a fade in effect. When the page first loads the content of the Repeater can be printed. After the UpdatePanel is refreshed a print preview shows the Repeater content to be blank. Does anyone know why this is occurring? Has anyone found a solution?
EDIT
I forgot to mention, this is only a problem in IE, not FF or Chrome
Here is a basic test page I've knocked together which gives an example of the problem (for ease of posting I've just dumped all the code in the markup):
<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="Default.aspx.vb" Inherits="TestUpdatePanelPrint._Default" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajax" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Dim myList As New List(Of Integer)
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
myList.Add(1)
myList.Add(2)
myList.Add(3)
myList.Add(4)
Filter(-1)
End Sub
Protected Sub Filter(ByVal number As Integer)
Dim filtered As List(Of Integer) = myList
If (number > 0) Then
filtered = myList.Where(Function(x) x = number).ToList()
End If
repeater.DataSource = filtered
repeater.DataBind()
End Sub
Private Sub button_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles button.Click
Filter(CInt(list.SelectedValue))
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="script" runat="server"></asp:ScriptManager>
<div>
<asp:ListBox ID="list" runat="server">
<asp:ListItem Text="-1" Value="-1" />
<asp:ListItem Text="1" Value="1" />
<asp:ListItem Text="2" Value="2" />
<asp:ListItem Text="3" Value="3" />
</asp:ListBox>
<asp:Button ID="button" text="Filter" runat="server" />
<br />
<ajax:UpdatePanelAnimationExtender id="upExSearch" runat="server"
TargetControlID="UpdatePanel1">
<Animations>
<OnUpdated>
<FadeIn duration=".25" Fps="30" />
</OnUpdated>
</Animations>
</ajax:UpdatePanelAnimationExtender>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="button" EventName="Click" />
</Triggers>
<ContentTemplate>
<ul>
<asp:Repeater ID="repeater" runat="server">
<ItemTemplate>
<li><%# Container.DataItem %></li>
</ItemTemplate>
</asp:Repeater>
</ul>
</ContentTemplate>
</asp:UpdatePanel>
</div>
</form>
</body>
</html>
加载中,请稍侯......
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