asp.net mvc - Getting message “Store update, insert, or delete statement affected an unexpected number of rows (0)” ? -

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another big problem, here.

i have model:

public class lead     {         [system.componentmodel.dataannotations.column("le_codlead")]         public int leadid {get; set; }          [system.componentmodel.dataannotations.column("le_descr1")]         [required(errormessage="inserire nome del lead")]         [display(name="nominativo lead")]         public string name1 {get; set;}          [system.componentmodel.dataannotations.column("le_descr2")]         [display(name = "nominativo secondario")]         public string name2 { get; set; }         ...         ...         ...     }

controller (for create method):

[httppost]         public actionresult create(lead lead)         {             if (modelstate.isvalid)             {                 db.leads.add(lead);                 db.savechanges();                 return redirecttoaction("index");               }             return view(lead);         }

and view:

@model crmarcadia.models.lead  @{     viewbag.title = "create"; }  <h2>create</h2>  <script src="@url.content("~/scripts/jquery.validate.min.js")" type="text/javascript"></script> <script src="@url.content("~/scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>  @using (html.beginform()) {     @html.validationsummary(true, "attenzione! compilare tutti campi obbligatori")     <fieldset>         <legend>lead</legend>          <div class="editor-label">             @html.labelfor(model => model.name1)         </div>         <div class="editor-field">             @html.editorfor(model => model.name1)             @html.validationmessagefor(model => model.name1)         </div>          <div class="editor-label">             @html.labelfor(model => model.name2)         </div>         <div class="editor-field">             @html.editorfor(model => model.name2)             @html.validationmessagefor(model => model.name2)         </div>         ...         ...         ...         <p>             <input type="submit" value="create" />         </p>     </fieldset> }

but when try insert new lead throws exception in post title: entity framework: “store update, insert, or delete statement affected unexpected number of rows (0).” read on web caused id key (leadid, in case) not updating: suggest insert hiddenfor attribute in view id key, , did:

    @html.hiddenfor(model => model.leadid)

but 1 @ pressure of create button nothing happens.

does has solution (or workaround ;) ) @ problem, please?

thanks.

do have layer communicate ef ? entity context?

for update scenario:

if using same action create/edit place @html.hiddenfor(model => model.leadid) - hidden field between blocks @using (html.beginform()) { .... </fieldset> }.

if not help, @ article msdn - working objects


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