coolite(ext.net) store怎么绑定复杂类型，怎么替换信息


<ext:Store ID="Store1" OnRefreshData="Store1_RefershData"  runat="server" AutoLoad="true">  
     <Proxy>
               <ext:PageProxy/>
         </Proxy>
        <Reader>
            <ext:JsonReader IDProperty="ID">
                <Fields>                    
                <ext:RecordField Name="ID" Mapping="ID" />
                <ext:RecordField Name="Name" Mapping="Name"/>
                <ext:RecordField Name="TypeName" Mapping="TechnologyType.Name"/>
                <ext:RecordField Name="IsSmallUse" Mapping="IsSmallUse" />
                <ext:RecordField Name="IsMediumUse" Mapping="IsMediumUse" />
                <ext:RecordField Name="IsLargeUse" Mapping="IsLargeUse" />
                <ext:RecordField Name="IsHeavyUse" Mapping="IsHeavyUse" />
                <ext:RecordField Name="Re" Mapping="Re"/>
                <ext:RecordField Name="CreatedOn" Mapping="CreatedOn" DateFormat="yyyy-MM-dd"/>
                </Fields>
            </ext:JsonReader>
        </Reader>        
    </ext:Store>提示说这个
 <ext:RecordField Name="TypeName" Mapping="TechnologyType.Name"/>
找不到 Name，TechnologyType是引用类型。
第二个问题： <ext:TemplateColumn Sortable="false" Header="适用车型">
                                        <Template runat="server">
                                            <Html>
                                                <tpl for=".">
                                                    {IsSmallUse},
                                                    {IsMediumUse},
                                                    {IsLargeUse},
                                                    {IsHeavyUse}
                                                </tpl>
                                            </Html>
                                        </Template>
                                    </ext:TemplateColumn>   {IsSmallUse}这个是int的，我想程序替换成对应的文字信息。怎么替换。js,c#都行。