gridview is disappearing

**benmartin101** · Aug 15th, 2011, 12:55 AM

Here is my aspx page:

Code:

<&#37;@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="GridViewDisappearing._Default" %>

<%@ Register Assembly="GridViewDisappearing" Namespace="GridViewDisappearing" TagPrefix="cc1" %>
<!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 runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="ID"
            DataSourceID="SqlDataSource1">
            <Columns>
                <asp:BoundField DataField="ID" HeaderText="ID" ReadOnly="True" SortExpression="ID" />
                <asp:BoundField DataField="Product" HeaderText="Product" SortExpression="Product" />
                <asp:BoundField DataField="Warehouse" HeaderText="Warehouse" SortExpression="Warehouse" />
                <asp:BoundField DataField="Quantity" HeaderText="Quantity" SortExpression="Quantity" />
            </Columns>
        </asp:GridView>
        <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:SampleDBConnectionString %>"
            SelectCommand="SELECT [ID], [Product], [Warehouse], [Quantity] FROM [Inventory]">
        </asp:SqlDataSource>
        <asp:Button ID="Button1" runat="server" Text="Button" />
    </div>
    </form>
</body>
</html>

And here is the code behind:

Code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace GridViewDisappearing
{
    public partial class _Default : MyPage1
    {
        protected void Page_Init(object sender, EventArgs e)
        {
            int x =  GridView1.Rows.Count;
        }

        protected void Page_Load(object sender, EventArgs e)
        {
            
        }

       
    }
}

The first time the page is requested, it displays the gridview with the data. But when I click on the button, the gridview disappears (and only the button shows up). When I comment out the code:
int x = GridView1.Rows.Count;

in the Page_Init(), the gridview does NOT disappear. Why is that one line of code causing it to disappear?

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