Ext.Net中的布局是对ExtJS布局的封装，可以用在panel控件，或者继承自panel的控件。
<body>
<ext:ResourceManager runat="server" />
<div>
<ext:Viewport ID="Viewport1" runat="server" Layout="Fit">
<Items>
<ext:BorderLayout ID="BorderLayout1" runat="server">
<Items>
<ext:Panel runat="server" Region="West" Title="西" Width="100" Border="true">
</ext:Panel>
<ext:Panel runat="server" Region="East" Title="东" Width="100" Border="true">
</ext:Panel>
<ext:Panel runat="server" Region="North" Title="北" Height="100" Border="true">
</ext:Panel>
<ext:Panel runat="server" Region="South" Title="南" Height="100" Border="true">
</ext:Panel>
<ext:Panel runat="server" Region="Center" Title="中" Border="true">
</ext:Panel>
</Items>
</ext:BorderLayout>
</Items>
</ext:Viewport>
</div>
</body>
也可以是下边这种写法
<ext:Viewport ID="Viewport1" runat="server" Layout="BorderLayout">
<Items>
<ext:Panel runat="server" Region="West" Width="350">
<ext:Panel runat="server" Width="213px" Region="West" ID="ctl138" IDMode="Legacy">
<Items>
<ext:AccordionLayout ID="AccordionLeft" runat="server" Animate="true">
</ext:AccordionLayout>
</Items>
</ext:Panel>
ext.net 布局-- BorderLayout（边框布局）
原文地址：http://blog.csdn.net/wyl900606/article/details/44702503
