[CLOSED] very strange null reference exception?

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    [CLOSED] very strange null reference exception?

    <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm8.aspx.cs" Inherits="TobrosCWT.pages.pingzheng.WebForm8" %>
    <!DOCTYPE html>
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head runat="server">
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <script runat="server">
        public class Company
            public int ID { get; set; }
            public string Name { get; set; }
        public List<Company> GetData()
            return new List<Company>
                        new Company{ID = 1,Name = "comp1"},
                        new Company{ID = 2,Name = "comp2"},
        protected void Page_Load(object sender, EventArgs e)
            if (!X.IsAjaxRequest)
        private void BindData()
            this.store1.DataSource = GetData();
        protected void clickme(object sender, DirectEventArgs e)
        <form id="form1" runat="server">
            <ext:ResourceManager runat="server"></ext:ResourceManager>
            <ext:GridPanel runat="server" ID="gridpanel1" Height="100">
                    <ext:Toolbar runat="server">
                            <ext:Button runat="server" Text="show the column">
                                    <Click OnEvent="clickme"></Click>
                    <ext:Store runat="server" ID="store1">
                            <ext:Model runat="server" IDProperty="ID">
                                    <ext:ModelField Name="ID" Type="Int" />
                                    <ext:ModelField Name="Name" />
                <ColumnModel ID="ColumnModel1" runat="server">
                        <ext:Column runat="server" DataIndex="ID" Text="ID"></ext:Column>
                        <ext:Column ID="Column1" runat="server" DataIndex="Name" Text="NAME"></ext:Column>
                        <ext:ComponentColumn Hidden="true" ID="cc_bz" runat="server" Align="Right" Text="币别" DataIndex="bizhong" Editor="True" Width="230">
                                <ext:Container ID="Container3" runat="server" Layout="HBoxLayout">
                                        <ext:ComboBox ID="ComboBox1" runat="server" ItemID="Currency" InputWidth="60">
                                                <ext:ListItem Text="USD" Value="1" Mode="Raw" />
                                                <ext:ListItem Text="EURO" Value="2" Mode="Raw" />
                                        <ext:TextField runat="server" InputWidth="60"></ext:TextField>
                                        <ext:TextField runat="server" FieldLabel="原币" LabelWidth="40" InputWidth="50"></ext:TextField>
    this.store1 throws null reference exception, but I have defined the store1 in the gridpanel, why?
    Last edited by Daniil; Aug 06, 2013 at 9:28 AM. Reason: [CLOSED]

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