CH 17 Storing Genre Preferences in the Profile

leeWozyWarren · December 7th, 2011, 08:19 AM

CH 17 Storing Genre Preferences in the Profile

Completed this and ran it. However, I get a build error as below:

Code:

Error	1	The type or namespace name 'Collection' does not exist in the namespace 'System' (are you missing an assembly reference?)	c:\Users\Admin\AppData\Local\Temp\Temporary ASP.NET Files\clientmanagertest\9bf60365\afcf33db\App_Code.cessscad.1.cs

Here is my code behind: (I am using FavoriteIssues instead of FavoriteGenres)

Code:

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

public partial class UserProfile : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            FirstName.Text = Profile.FirstName;
            LastName.Text = Profile.LastName;
            DateOfBirth.Text = Profile.DateOfBirth.ToShortDateString();
            Bio.Text = Profile.Bio;
        }
    }
    protected void SaveButton_Click(object sender, EventArgs e)
    {
if (Page.IsValid)
        {
            Profile.FirstName = FirstName.Text;
            Profile.LastName = LastName.Text;
            Profile.DateOfBirth = DateTime.Parse(DateOfBirth.Text);
            Profile.Bio = Bio.Text;
    //Clear the existing list
    Profile.FavoriteIssues.clear();

    //Now add the selected Issues
   foreach (ListItem myItem in PreferenceList.Items)
    {
        if (myItem.Selected)
    {
            Profile.FavoriteIssues.Add(Convert.ToInt32(myItem.Value));
        }
        }
    }
        protected void PreferenceList_DataBound(object sender, EventArgs e)
    {
        foreach (ListItem myitem in PreferenceList.Items)
        {
            int currentValue = Convert.ToInt32(myitem.Value);
            if (Profile.FavoriteIssues.contains(currentValue))
            {
                myitem.Selected = true;
            }
    }
}

And Web Config:

Code:

 <profile>
      <properties>
        <add name="FirstName" />
        <add name="LastName" />
        <add name="DateOfBirth" type="System.DateTime" />
        <add name="Bio" />
        <add name="FavoriteIssues" type="System.Collection.Generic.List`1[System.Int32]" />
      </properties>
      <providers>
        <clear />
        <add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider" connectionStringName="ApplicationServices" applicationName="/" />
      </providers>
    </profile>

leeWozyWarren · December 7th, 2011, 08:29 AM

Ahhh - Found it. I had misspelt collections as collection!

Now the next issue on the same page.

Quote:

Error 1 'System.Collections.Generic.List<int>' does not contain a definition for 'clear' and no extension method 'clear' accepting a first argument of type 'System.Collections.Generic.List<int>' could be found (are you missing a using directive or an assembly reference?) C:\BegASPNET\clientManagerTest\UserProfile.aspx.cs 29 36 C:\BegASPNET\clientManagerTest\

Error 2 'System.Collections.Generic.List<int>' does not contain a definition for 'contains' and no extension method 'contains' accepting a first argument of type 'System.Collections.Generic.List<int>' could be found (are you missing a using directive or an assembly reference?) C:\BegASPNET\clientManagerTest\UserProfile.aspx.cs 47 40 C:\BegASPNET\clientManagerTest\

leeWozyWarren · December 7th, 2011, 08:34 AM

Doh!

I re-typed the two lines in the code behind and the error disappeared. Even though it said exactly the same as before!

Why does that happen?

Imar · December 7th, 2011, 01:20 PM

Quote:

Why does that happen?

Judging from the earlier, code, it seems you used clear with a lower case c. Since C# is case sensitive, and the method is called Clear with a capital C, you get an error.

Cheers,

Imar