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POASP.NET MVC 4 Error Saving ViewModels
 

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    <p>Can somebody help me on how to save and update data into multiple entities using a ViewModel?</p> <p>I have a ViewModel that looks like this:</p> <pre><code> public class StudentViewModel { public Student student; public StudentAddress studentAddress { get; set; } public StudentPhoto studentPhoto { get; set; } // Three entities are related to one to one relationship public StudentViewModel() { } } </code></pre> <p>My Controller is:</p> <pre><code> [HttpPost] public ActionResult Create(StudentViewModel studentViewModel) { if (ModelState.IsValid) { return View(studentViewModel); } Student s = new Student() { Name =studentViewModel.Student.Name, Speciality = studentViewModel.Student.Speciality, DateOfReg = studentViewModel.Student.DateOfJoinig, Qualification = studentViewModel.Student.Qualification, Email = studentViewModel.Student.Email }; StudentAddress sa = new StudentAddress() { StudentId= studentViewModel.Student.StudentId, Address = studentViewModel.StudentAddress.Address, Area = studentViewModell.StudentAddress.Area, City = studentViewModel.StudentAddress.City, State = studentViewModel.StudentAddress.State, Mobile = studentViewModel.StudentAddress.Mobile }; StudentPhoto sp = new StudentPhoto() { StudentId= studentViewModel.Student.StudentId, Photo = studentViewModel.StudentPhoto.Photo }; db.Students.Add(s); db.StudentAddress.Add(sa); db.StudentPhoto.Add(sp); db.SaveChanges(); return RedirectToAction("Home"); } </code></pre> <p>View is: </p> <pre><code>@using (Html.BeginForm()) { @Html.ValidationSummary(true) &lt;fieldset&gt; &lt;legend&gt;Doctor&lt;/legend&gt; @Html.EditorFor(model =&gt; model.Student.Name ) @Html.EditorFor(model =&gt; model.Student.Speciality) @Html.EditorFor(model =&gt; model.Student.DateOfJoinig) @Html.EditorFor(model =&gt; model.Student.Standard) @Html.HiddenFor(model =&gt; model.Student.StudentId) @Html.EditorFor(model =&gt; model.StudentAddress.Address) @Html.EditorFor(model =&gt; model.StudentAddress.Area) @Html.EditorFor(model =&gt; model.StudentAddress.City) @Html.EditorFor(model =&gt; model.StudentAddress.State) @Html.HiddenFor(model =&gt; model.Student.StudentId) @Html.EditorFor(model =&gt; model.StudentPhoto.Photo) &lt;p&gt; &lt;input type="submit" value="Create" /&gt; &lt;/p&gt; &lt;/fieldset&gt; } &lt;div&gt; @Html.ActionLink("Back to List", "Index") &lt;/div&gt; </code></pre> <p>I was able to retrieve and display the data (from multiple entities) into the view. However, now I'm stuck on how can I save and update the above entities with the new data. Most of the examples are 1-1 relationship the mapping is automatic, but in this case the data belongs to multiple entities.</p> <p>My problem is when i try to save data it redirected to the create page. "ModelState.IsValid" is false always so no data saved. Please help me how do i proceed. </p> <p>Thanks.</p>
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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