Hi,
What problems do you have? asUCString is default sort type if Type="String". If set explicitly SortType="AsUCString" then it works also. Here is my test case
<%@ Page Language="C#" %>
<%@ Import Namespace="System.Collections.Generic"%>
<%@ Register Assembly="Coolite.Ext.Web" Namespace="Coolite.Ext.Web" TagPrefix="ext" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title></title>
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
var data = new List<object>
{
new {Common="B"},
new {Common="C"},
new {Common="A"},
new {Common="b"},
new {Common="c"},
new {Common="a"}
};
Store1.DataSource = data;
Store1.DataBind();
}
</script>
</head>
<body>
<ext:ScriptManager ID="ScriptManager1" runat="server" StateProvider="None" />
<ext:Store runat="server" ID="Store1" AutoLoad="true">
<Reader>
<ext:JsonReader>
<Fields>
<ext:RecordField Name="Common" SortType="AsUCString" />
</Fields>
</ext:JsonReader>
</Reader>
<SortInfo Field="Common" Direction="ASC" />
</ext:Store>
<ext:Window ID="Window1"
runat="server"
Title="Window"
Height="500"
Width="500">
<Body>
<ext:FitLayout ID="FitLayout1" runat="server">
<ext:GridPanel
ID="GridPanel1"
runat="server"
AutoExpandColumn="Common"
Title="Plants"
Frame="false"
StoreID="Store1">
<ColumnModel ID="ColumnModel1" runat="server">
<Columns>
<ext:Column ColumnID="Common" Header="Common Name" DataIndex="Common" Sortable="true" />
</Columns>
</ColumnModel>
</ext:GridPanel>
</ext:FitLayout>
</Body>
</ext:Window>
</body>
</html>