Executing Several Animations after Each Other
Executing Several Animations after Each Other
Christian Wenz
Overview
The Animation control in the ASP.NET AJAX Control Toolkit is not just a control but a whole framework to add animations to a control. It allows to run several animations one after the other.
Steps
First of all, include the ScriptManager in the page; then, the ASP.NET AJAX library is loaded, making it possible to use the Control Toolkit:
<asp:ScriptManager ID="asm" runat="server" />
The animation will be applied to a panel of text which looks like this:
<asp:Panel ID="panelShadow" runat="server" CssClass="panelClass">
ASP.NET AJAX is a free framework for quickly creating a new generation of more
efficient, more interactive and highly-personalized Web experiences that work
across all the most popular browsers.<br />
ASP.NET AJAX is a free framework for quickly creating a new generation of more
efficient, more interactive and highly-personalized Web experiences that work
across all the most popular browsers.<br />
ASP.NET AJAX is a free framework for quickly creating a new generation of more
efficient, more interactive and highly-personalized Web experiences that work
across all the most popular browsers.<br />
</asp:Panel>
In the associated CSS class for the panel, define a nice background color and also set a fixed width for the panel:
<style type="text/css">
.panelClass {background-color: lime; width: 300px;}
</style>
Then, add the AnimationExtender to the page, providing an ID, the TargetControlID attribute and the obligatory runat="server":
<ajaxToolkit:AnimationExtender ID="ae" runat="server" TargetControlID="Panel1">
Within the <Animations> node, use <OnLoad> to run the animations once the page has been fully loaded. Generally, <OnLoad> only accepts one animation. The Animation framework allows you to join several animations into one using the <Sequence> element. All animations within <Sequence> are executed one after the other.
Here is the a possible markup for the AnimationExtender control, first making the panel wider and then decreasing its height:
<ajaxToolkit:AnimationExtender ID="ae" runat="server" TargetControlID="Panel1">
<Animations>
<OnLoad>
<Sequence>
<Resize Width="1000" Unit="px" />
<Resize Height="150" Unit="px" />
</Sequence>
</OnLoad>
</Animations>
</ajaxToolkit:AnimationExtender>
When you run this script, the panel first gets wider and then smaller.
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