效果：
<div>
<ext:ScriptManager ID="ScriptManager1" runat="server">
</ext:ScriptManager>
<ext:FormPanel ID="FormPanel1" runat="server" BodyStyle="padding:5px;" ButtonAlign="Center"
Frame="true" AutoHeight="true" Title="三列布局演示" Width="590" LabelAlign="Left">
<Body>
<ext:Panel ID="Panel1" runat="server" Frame="false" Border="false" BodyBorder="false">
<Body>
<ext:ColumnLayout ID="ColumnLayout1" runat="server">
<ext:LayoutColumn ColumnWidth="0.33">
<ext:Panel ID="Panel2" runat="server">
<Body>
<ext:FormLayout ID="FormLayout5" runat="server" LabelWidth="50">
<Anchors>
<ext:Anchor>
<ext:TextField ID="TextField1" runat="server" FieldLabel="字段1">
</ext:TextField>
</ext:Anchor>
<ext:Anchor>
<ext:TextField ID="TextField4" runat="server" FieldLabel="字段1">
</ext:TextField>
</ext:Anchor>
</Anchors>
</ext:FormLayout>
</Body>
</ext:Panel>
</ext:LayoutColumn>
<ext:LayoutColumn ColumnWidth="0.33">
<ext:Panel ID="Panel3" runat="server">
<Body>
<ext:FormLayout ID="FormLayout2" runat="server" LabelWidth="50">
<Anchors>
<ext:Anchor>
<ext:TextField ID="TextField2" runat="server" FieldLabel="字段2">
</ext:TextField>
</ext:Anchor>
<ext:Anchor>
<ext:TextField ID="TextField5" runat="server" FieldLabel="字段2">
</ext:TextField>
</ext:Anchor>
<ext:Anchor>
<ext:TextField ID="TextField6" runat="server" FieldLabel="字段2">
</ext:TextField>
</ext:Anchor>
</Anchors>
</ext:FormLayout>
</Body>
</ext:Panel>
</ext:LayoutColumn>
<ext:LayoutColumn ColumnWidth="0.33">
<ext:Panel ID="Panel4" runat="server">
<Body>
<ext:FormLayout ID="FormLayout3" runat="server" LabelWidth="50">
<Anchors>
<ext:Anchor>
<ext:TextField ID="TextField3" runat="server" FieldLabel="字段3">
</ext:TextField>
</ext:Anchor>
<ext:Anchor>
<ext:TextField ID="TextField7" runat="server" FieldLabel="字段3">
</ext:TextField>
</ext:Anchor>
<ext:Anchor>
<ext:TextField ID="TextField8" runat="server" FieldLabel="字段3">
</ext:TextField>
</ext:Anchor>
<ext:Anchor>
<ext:TextField ID="TextField9" runat="server" FieldLabel="字段3">
</ext:TextField>
</ext:Anchor>
</Anchors>
</ext:FormLayout>
</Body>
</ext:Panel>
</ext:LayoutColumn>
</ext:ColumnLayout>
</Body>
</ext:Panel>
<ext:Panel ID="Panel5" runat="server" Frame="false" Border="false" BodyBorder="false">
<Body>
<ext:FormLayout ID="FormLayout1" runat="server" LabelWidth="50">
<Anchors>
<ext:Anchor>
<ext:TextArea ID="TextArea1" runat="server" Height="100" FieldLabel="文本" Width="500">
</ext:TextArea>
</ext:Anchor>
</Anchors>
</ext:FormLayout>
</Body>
</ext:Panel>
</Body>
<Buttons>
<ext:Button ID="Button1" runat="server" Icon="Disk" Text="Submit">
</ext:Button>
</Buttons>
</ext:FormPanel>
</div>