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ASP .Net MVC: NullReferenceException was unhandled by user code

Posted on 2011-02-22
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1,643 Views
Last Modified: 2013-12-17
I am having the following error in the forech of the code below (I am using Entity Framework for the model):
NullReferenceException was unhandled
Use the "new" keyword to create an object instance.

<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<IEnumerable<MvcApplication1.Models.Project>>" %>

<asp:Content ID="Content1" ContentPlaceHolderID="TitleContent" runat="server">
	Index
</asp:Content>

<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">

    <h2>Index</h2>

    <table>
        <tr>
            <th></th>
            <th>
                ProjectID
            </th>
            <th>
                ProjectNumber
            </th>
            <th>
                ProjectTitle
            </th>
            <th>
                StartDate
            </th>
            <th>
                EndDate
            </th>
            <th>
                MinLatitude
            </th>
            <th>
                MaxLatitude
            </th>
            <th>
                MinLongitude
            </th>
            <th>
                MaxLongitude
            </th>
            <th>
                MinAltitude
            </th>
            <th>
                MaxAltitude
            </th>
            <th>
                ObjectiveCode
            </th>
            <th>
                TracerID
            </th>
            <th>
                TracerInfo
            </th>
            <th>
                AnalyticalErrors
            </th>
            <th>
                ProjectReferences
            </th>
            <th>
                SummaryInfo
            </th>
            <th>
                TCProjectNumber
            </th>
            <th>
                DistributionRestricted
            </th>
            <th>
                CheckStatus
            </th>
            <th>
                Complete
            </th>
            <th>
                DateEntered
            </th>
            <th>
                DateChanged
            </th>
            <th>
                DateExported
            </th>
        </tr>

    <% foreach (var item in Model) { %>
    
        <tr>
            <td>
                <%: Html.ActionLink("Edit", "Edit", new { id=item.ProjectID }) %> |
                <%: Html.ActionLink("Details", "Details", new { id=item.ProjectID })%> |
                <%: Html.ActionLink("Delete", "Delete", new { id=item.ProjectID })%>
            </td>
            <td>
                <%: item.ProjectID %>
            </td>
            <td>
                <%: item.ProjectNumber %>
            </td>
            <td>
                <%: item.ProjectTitle %>
            </td>
            <td>
                <%: String.Format("{0:g}", item.StartDate) %>
            </td>
            <td>
                <%: String.Format("{0:g}", item.EndDate) %>
            </td>
            <td>
                <%: item.MinLatitude %>
            </td>
            <td>
                <%: item.MaxLatitude %>
            </td>
            <td>
                <%: item.MinLongitude %>
            </td>
            <td>
                <%: item.MaxLongitude %>
            </td>
            <td>
                <%: item.MinAltitude %>
            </td>
            <td>
                <%: item.MaxAltitude %>
            </td>
            <td>
                <%: item.ObjectiveCode %>
            </td>
            <td>
                <%: item.TracerID %>
            </td>
            <td>
                <%: item.TracerInfo %>
            </td>
            <td>
                <%: item.AnalyticalErrors %>
            </td>
            <td>
                <%: item.ProjectReferences %>
            </td>
            <td>
                <%: item.SummaryInfo %>
            </td>
            <td>
                <%: item.TCProjectNumber %>
            </td>
            <td>
                <%: item.DistributionRestricted %>
            </td>
            <td>
                <%: item.CheckStatus %>
            </td>
            <td>
                <%: item.Complete %>
            </td>
            <td>
                <%: String.Format("{0:g}", item.DateEntered) %>
            </td>
            <td>
                <%: String.Format("{0:g}", item.DateChanged) %>
            </td>
            <td>
                <%: String.Format("{0:g}", item.DateExported) %>
            </td>
        </tr>
    
    <% } %>

    </table>

    <p>
        <%: Html.ActionLink("Create New", "Create") %>
    </p>

</asp:Content>

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Question by:DistillingExperts
2 Comments
 
LVL 6

Accepted Solution

by:
ViceroyFizzlebottom earned 500 total points
ID: 34953518
You don't show the controller code, so I'll ask the obvious question as to whether you are instantiating your model and checking for null before you return your View from the controller?
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Author Comment

by:DistillingExperts
ID: 34959348
I recreate the project and now I got another error that I already posted.
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