Databases
StackOverflow2013
Postsdbo
POHow to populate an dropdownlistfor from database in ASP.NET MVC 4
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHow to populate an dropdownlistfor from database in ASP.NET MVC 4
    primarykey
    data
    text
    <p>As the title says I'm looking for some help in that task, I've read many tutorials about it but none of them can solved my problem which is how to load a <code>dropdownlistfor</code> from database. By far, I got the following code:</p> <pre><code>**LNClientes():** public List&lt;ENDistrito&gt; DistritoListar() { return new ADClientes().DistritoListar(); } **ADClientes():** public List&lt;ENDistrito&gt; DistritoListar() { Database oDatabase = DatabaseFactory.CreateDatabase(ConfigurationManager.AppSettings["conexionBD"]); DbCommand odbcommand = oDatabase.GetStoredProcCommand("USP_SEL_DISTRITOS"); List&lt;ENDistrito&gt; lista = new List&lt;ENDistrito&gt;(); using (IDataReader reader = oDatabase.ExecuteReader(odbcommand)) { while (reader.Read()) lista.Add(new ENDistrito(reader)); } return lista; } **Controller:** public ActionResult Registrar() { ViewBag.Message = Resources.Language.Title_Page_MC_C; var ListaDistrito = new LNClientes().DistritoListar(); ViewBag.ObtenerDistrito = new SelectList(ListaDistrito, "IdDistrito", "DescripcionDistrito"); return View(); } </code></pre> <p><strong>View:</strong> </p> <pre><code>&lt;div class="editor-field"&gt; @Html.EditorFor(model =&gt; model.DistritoCliente) @Html.DropDownListFor(model =&gt; model.DistritoCliente,(SelectList)ViewBag.ObtenerDistrito,"--Seleccione--") @Html.ValidationMessageFor(model =&gt; model.DistritoCliente) &lt;/div&gt; </code></pre> <p>Till this point everything is ok, when i open that form the <code>dropdownlistfor</code> works but when i submit the form i got the following message: </p> <blockquote> <p>There is no ViewData item of type 'IEnumerable' that has the key 'DistritoCliente'.</p> </blockquote> <p>Any idea on what I'm doing wrong or how could i solve this problem.</p> <p>Thanks in advance.</p> <p>Alex</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USAlekz
    1. USAlex
    plurals
    1. PL
      singulars
      1. LTLinked
    1. PL
      singulars
      1. LTLinked
    2. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POHow to populate an dropdownlistfor from database in ASP.NET MVC 4
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    2. VO
      singulars
      1. POHow to populate an dropdownlistfor from database in ASP.NET MVC 4
      1. This table or related slice is empty.
      1. VTUpMod
    1. COHow come you're using a data reader when you're just reading all your data into a list at one time?
      singulars
      1. POHow to populate an dropdownlistfor from database in ASP.NET MVC 4
      1. USYuriy Faktorovich
    2. CODoes http://stackoverflow.com/questions/2849341/there-is-no-viewdata-item-of-type-ienumerableselectlistitem-that-has-the-key solve your problem?
      singulars
      1. POHow to populate an dropdownlistfor from database in ASP.NET MVC 4
      1. USYuriy Faktorovich
    3. COi followed the article and still have not solve my problem ~ i changed some things like in controller im doing this: ViewData["Distritos"] = new SelectList(new LNClientes().DistritoListar(), "IdDistrito", "DescripcionDistrito"); but the problem still is the declaration of the dropdownlist which is @Html.DropDownListFor(Model=> Model.DistritoCliente,((SelectListItem)ViewData["Distrito"])) but it throws error of arguments, any other idea to solve it
      singulars
      1. POHow to populate an dropdownlistfor from database in ASP.NET MVC 4
      1. USAlex
 

Querying!

 
Guidance
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.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload