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POSaving data from MultiSelectList in Edit and Create Views
 

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    <p>I have 3 tables: Companies, Subcontracts, and CompanyToSubcontract</p> <p>The CompanyToSubcontract table is the guid of the Company and guid of the Subcontract. I have a MultiSelectList on the Subcontract Edit and Create views where the user can select multiple companies. I finally got it working where it displays the correct companies as selected in the Subcontract Edit view. I'm not having an issue with saving the data.</p> <p>In the create view, the subcontract doesn't have a guid until it's written to the Sql database, so how can I get the guid to save to the CompanyToSubcontract table?</p> <p>Also, in the edit view, I'm doing something wrong. It doesn't save.the company selections. I also need to delete records for companies which are unselected. What is the best way to go about doing that?</p> <p>I followed the NerdDinner tutorial to get my basic structure and now I'm trying to update to fulfill my needs.</p> <p>Anyone who can point me in the right direction?</p> <p>In SubcontractRepository:</p> <pre><code>public void Save() { db.SubmitChanges(); } </code></pre> <p>In Controller:</p> <pre><code> [AcceptVerbs(HttpVerbs.Post), Authorize] public ActionResult Edit(string id, FormCollection formValues) { // Retrieve existing subcontract subcontract subcontract = subcontractRepository.GetSubcontract(id); if (subcontract == null) return View("NotFound"); else { try { UpdateModel(subcontract); IEnumerable&lt;Guid&gt; selectedCompanies = Request.Form["Companies"].Split(new Char[] { ',' }).Select(idStr =&gt; new Guid(idStr)); foreach (var item in selectedCompanies) { CompanyToSubcontract cs = new CompanyToSubcontract(); cs.subcontract_id = subcontract.subcontract_id; cs.company_id = item; subcontractRepository.Save(); } subcontract.lastupdate_date = DateTime.Now; subcontract.lastupdatedby_user = User.Identity.Name; //Persist changes back to database subcontractRepository.Save(); //Perform HTTP redirect to details page for the saved subcontract return RedirectToAction("Details", new { id = subcontract.subcontract_no }); } catch { ModelState.AddRuleViolations(subcontract.GetRuleViolations()); return View(new SubcontractFormViewModel(subcontract)); } } } </code></pre>
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A row detail

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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