ASP.NET Ajax UpdatePanel 刷新時的淡出淡入效果

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#asp.net #ajax #asp #server #animation #assembly

本文介绍如何在ASP.NET AJAX的UpdatePanel刷新过程中实现淡入淡出效果，通过AjaxControlToolkit的Animation特性，不仅限于淡入淡出，还可以实现如Resize、Move等更多动画效果。

2007年08月01日 11:15:00

ASP.NET Ajax UpdatePanel 刷新時的淡出淡入效果

文/黃忠成

近日老婆為了準備考試，在網路上找尋考古題時，偶然訪問了一個某教授的網站，這個網站在切換頁面時，以淡出淡入效果來取代頁面的刷新，雖然以前早就看過這類效果，不過由於最近在寫ASP.NET Ajax的書籍，突然想到這也可以用在UpdatePanel的刷新過程！遂寫下一個小範例，這個例子可以在UpdatePanel刷新時，呈現淡出及淡入的效果，更有趣的是，這個淡出及淡入的效果是利用Ajax Control Toolkit的Animation來達成的，這意味著其它如Resize、Move、Color等Animation也可以與此技巧合用，例子本身並不複雜，概念也很簡單，不過若你仔細看裡面的程式碼，我想你會得到一些使用ASP.NET Ajax的啟發，當然！這只是我的猜想，哈~~~。

PS:話說回來.......我週日得陪考，8點到下午3點，看來得抱筆記電腦去試場寫書了，<">！！

Default.aspx

>%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %<

>%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %<

>!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"<

>html xmlns="http://www.w3.org/1999/xhtml"<

>head runat="server"<

>title<Untitled Page>/title<

>/head<

>body<

>form id="form1" runat="server"<

>cc1:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server"<

>/cc1:ToolkitScriptManager<

>asp:Panel ID="hiddenPanel" runat=server Height="0px" Width="0px" Style="position:absolute; left:0px; top:0px; z-index:100; display:none"<

>div id=hiddenInnerPanel<>/div<

>/asp:Panel<

>div<

>asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional"<

>ContentTemplate<

>asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString=">%$ ConnectionStrings:NorthwindConnectionString %<"

SelectCommand="SELECT [CustomerID], [CompanyName], [ContactName], [ContactTitle], [Address], [City], [Region], [PostalCode], [Country], [Phone], [Fax] FROM [Customers]"<

>/asp:SqlDataSource<

>asp:GridView ID="GridView1" runat="server"

AllowPaging="True" AutoGenerateColumns="False"

BackColor="LightGoldenrodYellow" BorderColor="Tan"

BorderWidth="1px" CellPadding="2"

DataKeyNames="CustomerID" DataSourceID="SqlDataSource1"

ForeColor="Black" GridLines="None" PageSize="20"<

>FooterStyle BackColor="Tan" /<

>Columns<

>asp:CommandField ShowSelectButton="True" /<

>asp:BoundField DataField="CustomerID"

HeaderText="CustomerID" ReadOnly="True"

SortExpression="CustomerID" /<

>asp:BoundField DataField="CompanyName"

HeaderText="CompanyName"

SortExpression="CompanyName" /<

>asp:BoundField DataField="ContactName"

HeaderText="ContactName"

SortExpression="ContactName" /<

>asp:BoundField DataField="ContactTitle"

HeaderText="ContactTitle"

SortExpression="ContactTitle" /<

>asp:BoundField DataField="Address"

HeaderText="Address" SortExpression="Address" /<

>asp:BoundField DataField="City" HeaderText="City"

SortExpression="City" /<

>asp:BoundField DataField="Region" HeaderText="Region"

SortExpression="Region" /<

>asp:BoundField DataField="PostalCode"

HeaderText="PostalCode" SortExpression="PostalCode" /<

>asp:BoundField DataField="Country" HeaderText="Country"

SortExpression="Country" /<

>asp:BoundField DataField="Phone" HeaderText="Phone"

SortExpression="Phone" /<

>asp:BoundField DataField="Fax" HeaderText="Fax"

SortExpression="Fax" /<

>/Columns<

>SelectedRowStyle BackColor="DarkSlateBlue"

ForeColor="GhostWhite" /<

>PagerStyle BackColor="PaleGoldenrod"

ForeColor="DarkSlateBlue" HorizontalAlign="Center" /<

>HeaderStyle BackColor="Tan" Font-Bold="True" /<

>AlternatingRowStyle BackColor="PaleGoldenrod" /<

>/asp:GridView<

>/ContentTemplate<

>/asp:UpdatePanel<

>script language=javascript<

var prm = Sys.WebForms.PageRequestManager.getInstance();

prm.add_beginRequest(BeginRequest);

prm.add_endRequest(EndRequest);

//will,not just FadeIn/FadeOut,you can use other animation,like resize.

var ani = $create(

AjaxControlToolkit.Animation.FadeOutAnimation,

{target: $get('hiddenPanel'), duration: .5, fps :25});

function BeginRequest(sender,args)

{

//only playing animation at grid page-switching

if(args.get_postBackElement().id == "GridView1" &&

theForm.__EVENTARGUMENT.value.indexOf('Page') != -1)

{

//set visible and playing animation

var hiddenPanel = $get('hiddenPanel');

var updatePanel = $get('UpdatePanel1');

var bounds = Sys.UI.DomElement.getBounds(updatePanel);

if(Sys.Browser.agent == Sys.Browser.Firefox)

{

//for firefox,px is need.

hiddenPanel.style.width = bounds.width+"px";

hiddenPanel.style.height = bounds.height+"px";

}

else

{

hiddenPanel.style.width = bounds.width;

hiddenPanel.style.height = bounds.height;

}

Sys.UI.DomElement.setLocation(hiddenPanel,bounds.x,bounds.y);

//the key point,remove it will raise exception.

hiddenPanel.innerHTML =

updatePanel.innerHTML.replace(//id=temp_/g, "id=");

hiddenPanel.style.display = "block";

ani.add_ended(AniStop);

ani.play();

}

function AniStop()

{

//set hidden.

var hiddenPanel = $get('hiddenPanel');

hiddenPanel.style.left = "0px";

hiddenPanel.style.top = "0px";

hiddenPanel.style.height = "0px";

hiddenPanel.style.width = "0px";

hiddenPanel.style.display = "none";

hiddenPanel.innerHTML = "";

}

function EndRequest(sender,args)

{

//you can un-mark below code at async-postback ended,

//but we want user can see animation play to end ^_^

//ani.stop();

}

>/script<

>cc1:AnimationExtender ID="AnimationExtender1"

runat="server" TargetControlID="hiddenPanel"<

>/cc1:AnimationExtender<

>/div<

>/form<

>/body<

>/html<

效果圖

PS:不是糊掉哦，是淡入的交會點。

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