<ext:Store runat="server" ID="storeUserInfo" PageSize="" OnReadData="storeUserInfo_ReadData">

    <Model>

        <ext:Model ID="Model1" runat="server" IDProperty="Name" >

            <Fields>

                <ext:ModelField Name="Name" Type="String"></ext:ModelField>

                <ext:ModelField Name="Gender" Type="String"></ext:ModelField>

                <ext:ModelField Name="Age" Type="Int"></ext:ModelField>

            </Fields>

        </ext:Model>

    </Model>

    <Proxy>

        <ext:PageProxy></ext:PageProxy>

    </Proxy>

</ext:Store>

protected void storeUserInfo_ReadData(object sender, Ext.Net.StoreReadDataEventArgs e)

{

    int start = e.Start;

    int limit = e.Limit;

    var userInfoList = UserInfo.GetData();

    e.Total = userInfoList.Count;

    storeUserInfo.DataSource = userInfoList.Skip(start).Take(limit).ToList();

    storeUserInfo.DataBind();

}