Visual Studio 2008

cursedtea · 03-28-2009, 09:23 AM

Hey, I'm not sure if this is the right forum but if not I'm sorry.

I'm currently in the middle of developing a catalog based web app for my uni project. A few days ago whilst trying to implement a search feature, I hit some major problems. I've been trying to figure it out, but seen as ASP.net is fairly new to me, I wasn't getting anywhere.

My search box is located in my header user control. The problem I am having is that the codefile for my search page is not picking up the data from the header (least i think this is the problem).

The error I keep getting is:

Quote:

Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Web.HttpException: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.

I have done this search feature before on a project but I've probably screwed up somewhere along the line.

If anyone could help that would be great :)

Edit// Damn I've just noticed on the main page that theres a web dev forum. Is it possible to move this there?

cursedtea · 03-28-2009, 11:12 AM

Sorry for double post, couldnt edit the above post

Here's the code

Search bar in the header.ascx user control:

Code:

<div id="searchdiv">
          <asp:TextBox ID="searchText" Width="350" runat="server" class="input"/>
          <asp:Button ID="searchButton" Text="Search" class="btn" runat="server" PostBackUrl="~/search.aspx" />
        </div>

Search page:

Code:

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="search.aspx.cs" Inherits="search" %>
<%@ Register TagPrefix="uc" TagName="header" Src="~/header.ascx" %>
<%@ Register TagPrefix="uc" TagName="footer" Src="~/footer.ascx" %>

<!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 id="Head1" runat="server">
    <title>Shopaholics.com | Search</title>
    <link href="stylesheet.css" rel="stylesheet" type="text/css" />
</head>
<body>
    <form id="form1" runat="server">
    <uc:header id="header" runat="server" />
    <div id="location">Location: <a href="home.aspx">Home</a> » <a href="search.aspx">Search</a></div>

    <h1>Search</h1>
        
    <h2>Books » Author</h2>
    <asp:GridView ID="GridView1" runat="server" AllowPaging="True" 
        AllowSorting="True" CellPadding="4" 
        DataSourceID="AccessDataSource1"  DataKeyNames="ID" 
        ForeColor="#c8b0e5" GridLines="None" Width="95%">
        <FooterStyle BackColor="#c8b0e5" Font-Bold="True" ForeColor="White" />
        <RowStyle BackColor="#c8b0e5" ForeColor="#333333" />
        <Columns>
            <asp:BoundField DataField="title" HeaderText="Title" SortExpression="title" />
            <asp:BoundField DataField="author" HeaderText="Author" 
                SortExpression="author" />
            <asp:BoundField DataField="yr_rel" HeaderText="Year Released" 
                SortExpression="yr_rel" />
        </Columns>
        <PagerStyle BackColor="#FFCC66" ForeColor="#333333" HorizontalAlign="Center" />
        <SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="Navy" />
        <HeaderStyle BackColor="#42206d" Font-Bold="True" ForeColor="White" />
        <AlternatingRowStyle BackColor="White" />
    </asp:GridView>
    
    <asp:AccessDataSource ID="AccessDataSource1" runat="server" 
        DataFile="~/App_Data/Products.mdb" 
        SelectCommand="SELECT [ID], [author], [title], [yr_rel] FROM [books] 
                              WHERE ([author] Like '%' + ? + '%')
                              ORDER BY [author]">
        <SelectParameters>
           <asp:ControlParameter Name="author" 
               ControlID="header:searchText"
               PropertyName="Text" Type="String" DefaultValue="%" />
        </SelectParameters>
    </asp:AccessDataSource>
    


    
    <uc:footer id="footer" runat="server" />
    </form>
</body>
</html>

Finally the search.aspx.cs codefile:

Code:

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class search : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        String searchText;
        if (Page.PreviousPage != null)
        {
            Control userControl = PreviousPage.FindControl("header");

            searchText =
              ((TextBox)userControl.FindControl("searchText")).Text;
        }
        else
            if (IsPostBack)
            {
                searchText =
                ((TextBox)FindControl("header").FindControl("searchText")).Text;
            }
            else
            {
                System.Collections.Specialized.NameValueCollection postedValues
                = Request.Form;
                searchText = postedValues["searchText"] ;
            }
        ((TextBox)FindControl("header").FindControl("searchText")).Text =
    searchText;
    }
}