How to save the selected value of dropdownlist in DB : The Official Microsoft ASP.NET Forums

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sjfs00

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22 Posts

How to save the selected value of dropdownlist in DB

May 05, 2010 03:59 PM|LINK

Hi everyone!!

I am usin MVC 1.0 anc C#.

I want to use a dropdownlist to display some data, and select one of them, then press the button "Create" and the value goes to the DB.

i tried to do sth, but all what i did, is to display the data in the dropdownlist in the view, But for saving the selected value, i ally don't know how to proceed, am on this more than 6h today, i am totalled !!

Please if Some one has a simple solution, i am new developper in MVC, so dont be Harsh ;)

here is the code:

for the view :

<p>
                <label for="id_imputation">Imputations:</label>
                <%= Html.DropDownList("imputations", (IEnumerable<SelectListItem>)ViewData["imputations"])%>
                

            </p>
            <p>
                <input type="submit" value="Create" />
            </p>
        </fieldset>


    <% } %>


    <div>
        <%=Html.ActionLink("Back to List", "Index") %>
    </div>


</asp:Content>

and the COntroller :

        public ActionResult Create()
        {

           

            var impu = from im in _db.T_imputation select im.id_imputation;
            ViewData["imputations"] = new SelectList(impu.ToList());
            ViewData.Model = new T_Pointage_Materiel();
            return View();
        } 

        //
        // POST: /PointageMateriel/Create

        [AcceptVerbs(HttpVerbs.Post)]
        public ActionResult Create([Bind(Exclude = "id_pointage")] T_Pointage_Materiel PMACreer)
        {
            try
            {
                // TODO: Add insert logic here
                UpdateModel(PMACreer);
                //PMACreer.T_imputation.id_imputation = ;
                
                PMACreer.T_Materiel.Num_anael = "1";
                _db.AddToT_Pointage_Materiel(PMACreer);
                
                _db.SaveChanges();
                ViewData["rr"] = PMACreer.Compteur;
                return RedirectToAction("Index");
            }
            catch
            {
                return View();
            }
        }

Best regards !

and thanks a lot !

sjfs00

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ignatandrei

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Re: How to save the selected value of dropdownlist in DB

May 05, 2010 04:46 PM|LINK

T_Pointage_Materiel has a property named "imputations", like

<%= Html.DropDownList("imputations", (IEnumerable<SelectListItem>)ViewData["imputations"])%>

?

My .NET blog : http://msprogrammer.serviciipeweb.ro/ |2012 Programmer tools

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Pikesville P...

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197 Posts

Re: How to save the selected value of dropdownlist in DB

May 05, 2010 04:49 PM|LINK

When you're passing a model from a form to the controller, the dropdown will already have updated the class, providing the binding was done properly.

assuming your PMACreer class has a variable imputationsId, then that is what you should be naming your dropdown list.

<%= Html.DropDownList("imputationsId", (IEnumerable<SelectListItem>)ViewData["imputations"])%>

that is the desired method. While I admire your persistance, let's also not forget guys & gals that MVC is built on ASP.NET & HTML.

You could have done Request.Form["controlName"].ToString() to also get the value.

ControlId's need to be named the same as the Model attribute they bind to ...

Remember to mark as a answer if it helps, and to help someone else in kind...

You haven't had a beer until you've learned how to make your own...

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sjfs00

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22 Posts

Re: How to save the selected value of dropdownlist in DB

May 06, 2010 09:34 AM|LINK

Hi !

i fixed some lines , the code :

the controller code :

public ActionResult Create()
        {
          

             IEnumerable<SelectListItem> items = _db.T_Materiel.Select(c => new SelectListItem
             {
                  Value = c.Num_anael.ToString(),
                  Text =  c.Libelle
             });
            ViewData["imputations"] = items;
           

            return View();
        }
         

        //
        // POST: /PointageMateriel/Create


        [AcceptVerbs(HttpVerbs.Post)]
        public ActionResult Create([Bind(Exclude = "id_pointage")] T_Pointage_Materiel PMACreer)
        {
            try
            {
                // TODO: Add insert logic here
                UpdateModel(PMACreer);
                _db.AddToT_Pointage_Materiel(PMACreer);
                _db.SaveChanges();
                return RedirectToAction("Index");
            }
            catch
            {
                return View();
            }
        }

the View Code:

...

<p>
                <label for="id_imputation">Imputations:</label>
                <%= Html.DropDownList("Num_anael", (IEnumerable<SelectListItem>)ViewData["imputations"])%>
                
                
            </p>
            <p>
                <input type="submit" value="Create" />
            </p>
        </fieldset>

    <% } %>

    <div>
        <%=Html.ActionLink("Back to List", "Index") %>
    </div>

</asp:Content>

BUT , and there is always this #!§,% "but" , this returns an error:

<<L'exception System.NotSupportedException n'a pas été gérée par le code utilisateur Message="LINQ to Entities ne reconnaît pas la méthode « System.String ToString() », et cette dernière ne peut pas être traduite en expression de magasin." Source="System.Data.Entity" StackTrace: à System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.DefaultTranslator.Translate(ExpressionConverter parent,MethodCallExpression call) à System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.TypedTranslate(ExpressionConverter parent, MethodCallExpression linq) à System.Data.Objects.ELinq.ExpressionConverter.TypedTranslator`1.Translate(ExpressionConverter parent, Expression linq) à System.Data.Objects.ELinq.ExpressionConverter.TranslateExpression(Expression linq) à System.Data.Objects.ELinq.ExpressionConverter.MemberInitTranslator.TypedTranslate(ExpressionConverter parent, MemberInitExpression linq) à System.Data.Objects.ELinq.ExpressionConverter.TypedTranslator`1.Translate(ExpressionConverter parent, Expressionlinq) à System.Data.Objects.ELinq.ExpressionConverter.TranslateExpression(Expression linq) ...

<div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Data.Objects.ELinq.ExpressionConverter.TranslateLambda(LambdaExpression lambda, DbExpression input)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Data.Objects.ELinq.ExpressionConverter.TranslateLambda(LambdaExpression lambda, DbExpression input, DbExpressionBinding& binding)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.OneLambdaTranslator.Translate(ExpressionConverter parent, MethodCallExpression call, DbExpression& source, DbExpressionBinding& sourceBinding, DbExpression& lambda)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.SelectTranslator.Translate(ExpressionConverter parent, MethodCallExpression call)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.SequenceMethodTranslator.Translate(ExpressionConverter parent, MethodCallExpression call, SequenceMethod sequenceMethod)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Data.Objects.ELinq.ExpressionConverter.MethodCallTranslator.TypedTranslate(ExpressionConverter parent, MethodCallExpression linq)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Data.Objects.ELinq.ExpressionConverter.TypedTranslator`1.Translate(ExpressionConverter parent, Expression linq)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Data.Objects.ELinq.ExpressionConverter.TranslateExpression(Expression linq)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Data.Objects.ELinq.ExpressionConverter.Convert()</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Data.Objects.ELinq.ELinqQueryState.GetExecutionPlan(Nullable`1 forMergeOption)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Data.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Data.Objects.ObjectQuery`1.System.Collections.Generic.IEnumerable<T>.GetEnumerator()</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Web.Mvc.Html.SelectExtensions.SelectInternal(HtmlHelper htmlHelper, String optionLabel, String name, IEnumerable`1 selectList, Boolean allowMultiple, IDictionary`2 htmlAttributes)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Web.Mvc.Html.SelectExtensions.DropDownList(HtmlHelper htmlHelper, String name, IEnumerable`1 selectList)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à ASP.views_pointagemateriel_create_aspx.__RenderContent2(HtmlTextWriter __w, Control parameterContainer) dans c:\Documents and Settings\Administrateur\Mes documents\Visual Studio 2008\Projects\DSSCOLAS2\DSSCOLAS2\Views\PointageMateriel\Create.aspx:ligne 54</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Web.UI.Control.RenderChildren(HtmlTextWriter writer)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Web.UI.Control.Render(HtmlTextWriter writer)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Web.UI.Control.RenderControl(HtmlTextWriter writer)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à ASP.views_shared_site_master.__Render__control1(HtmlTextWriter __w, Control parameterContainer) dans c:\Documents and Settings\Administrateur\Mes documents\Visual Studio 2008\Projects\DSSCOLAS2\DSSCOLAS2\Views\Shared\Site.Master:ligne 72</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Web.UI.Control.RenderChildren(HtmlTextWriter writer)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Web.UI.Control.Render(HtmlTextWriter writer)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Web.UI.Control.RenderControl(HtmlTextWriter writer)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Web.UI.Control.RenderChildren(HtmlTextWriter writer)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Web.UI.Page.Render(HtmlTextWriter writer)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Web.Mvc.ViewPage.Render(HtmlTextWriter writer)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Web.UI.Control.RenderControl(HtmlTextWriter writer)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> à System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)</div> <div style="position: absolute; left: -10000px; top: 1038px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"> InnerException: </div> <div></div>

>>

What is the problem here ? wow , i think that this framework was not a good deal, even a dropdowlist is so difficult to put on ! What about using textbox instead of dropdownlist, can u pleasegive me the solution, i am lacking time !

thanks for the help !

sjfs00

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ignatandrei

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Re: How to save the selected value of dropdownlist in DB

May 06, 2010 10:10 AM|LINK

sjfs00
Value = c.Num_anael.ToString(),

There are some clr methods that are not supported(http://msdn.microsoft.com/en-us/library/bb738681.aspx) ... like

sjfs00
Value =c.Num_anael

you can do like this - by creating new list

var items = _db.T_Materiel.Select(c).ToList< Put here type of c>;
IEnumerable<SelectListItem> itemsSelect =new List<SelectListItem>
foreach(var item in items)
{itemsSelect .Add(new SelectListItem
{
Value = c.Num_anael.ToString(),
Text = c.Libelle
});
}

My .NET blog : http://msprogrammer.serviciipeweb.ro/ |2012 Programmer tools

Edited by ignatandrei on May 06, 2010 10:11 AM
Edited by KeFang Chen - MSFT on May 12, 2010 07:03 AM
Edited by KeFang Chen - MSFT on May 12, 2010 07:03 AM

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sjfs00

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22 Posts

Re: How to save the selected value of dropdownlist in DB

May 06, 2010 10:29 AM|LINK

i did as you said :

public ActionResult Create()
        {
          

            var  items = _db.T_Materiel.Select(c).ToList<T_Materiel >;
            IEnumerable<SelectListItem> itemsSelect =new List<SelectListItem>
            foreach(var item in items)
            {itemsSelect.Add(new SelectListItem
                {
                 Value = c.Num_anael.ToString(),
                 Text =  c.Libelle
                });
            }

BUT : it says that it doesn't recognize "c"

and "foreach iz underligned" it says: "Une expression new exige que type soit suivi de (), [] ou {}" translation: "an expression new demand type to be followed by (), [] ou {}"

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