Here is my aspx page:
And here is the code behind:Code:<%@ 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>
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: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)
{
}
}
}
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?
