Error when getting User info from Separate table in foreach loop

[ranaanees]

Hello,

I want to Show all Users on a Page. I am storing Profile info in a Separate table called UserProfileInfo. All is working ok. In a foreach loop when I get the FirstName or other fields stored in UserProfileInfo table it give error all the time in WebForms Application...

Here is my code

public class ApplicationUser : IdentityUser
{
public virtual UserProfileInfo UserProfileInfo { get; set; }
}
public class UserProfileInfo
{
public int Id { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
}

WebForm Code Behind to Load all Users

private ApplicationDbContext context;
private UserManager manager;
public List allUser;

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack) 
        {
            allUser = manager.Users.ToList();
            foreach (var usr in manager.Users) {
              lblUsers.Text += usr.UserName;   // Ok  
              lblUsers.Text += usr.UserProfileInfo.FirstName;  // Error
            }
        }
    }

    protected override void OnInit(EventArgs e)
    {
        base.OnInit(e);
        context = new ApplicationDbContext();
        manager = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(context));
    }

HTML For Loop with same error

     <% if (allUser.Count() > 0 )
            { %>
        <table class="table table-striped">
            <thead>
                <tr>
                    <th>Id</th>
                    <th>User Name</th>
                    <th>Name</th>
                </tr>
            </thead>
            <tbody>
                <% foreach (var user in allUser)
                   { %>
                <tr>
                    <td><%: user.Id %></td>
                    <td><%: user.UserName %></td>
                    <td><%: user.UserProfileInfo.FirstName %></td>
                </tr>
                <% } %>
            </tbody>
        </table>
        <% } else { %>
        <p class="text-danger">No User Found.</p>
        <% } %>

Error
An exception of type 'System.NullReferenceException' occurred in App_Web_4cfuyuel.dll but was not handled in user code

Need help...

[ranaanees]

Help Please....

[ranaanees]

Same Error in GridView

    public IQueryable<ApplicationUser> BindUsers()
    {
        var users = manager.Users;
        return users;
    }

---

< ID="GridView1" runat="server" CellPadding="4" ForeColor="#333333" GridLines="None" AutoGenerateColumns="false" SelectMethod="BindUsers">

                <asp:TemplateField HeaderText="Id">
                    <ItemTemplate>
                        <asp:Label ID="lblId" runat="server" Text='<%# Bind("ID") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>

                <asp:TemplateField HeaderText="User Name">
                    <ItemTemplate>
                        <asp:Label ID="lblUserName" runat="server" Text='<%# Bind("UserName") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>

                <asp:TemplateField HeaderText="First Name">
                    <ItemTemplate>
                        <asp:Label ID="lblFirstName" runat="server" Text='<%# Bind("UserProfileInfo.FirstName") %>'></asp:Label> //Error at this line
                    </ItemTemplate>
                </asp:TemplateField>

[ctolkien]

I think you need to eager load the UserProfileInfo using

.Include(x => x.UserProfileInfo)

[ranaanees]

@ctolkien it looks solution, but i am not getting the correct syntax for Include...

private UserManager manager; public List allUser;

protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{

            allUser = from m in manager.Users.Include(p => p.UserProfileInfo)
                           select m;

            --Error: how to write linq query with include in this scenario....?

       }
    }