mikhail-tsennykh / mvccheckboxlist Goto Github PK

Server Error in '/Navigator' Application.

Value cannot be null.
Parameter name: source

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.ArgumentNullException: Value cannot be null.
Parameter name: source

Source Error: 


Line 21: </div>
Line 22: <div class="editor-field checkbox">
Line 23: @Html.CheckBoxListFor(x => x.PostedGoals.GoalIDs,
Line 24:                       x => x.AvailableGoals,          
Line 25:                       x => x.Id,               

Source File: c:\inetpub\wwwroot\Navigator\Navigator\Areas\Client\Views\Stakeholder\_Form.cshtml    Line: 23 

Stack Trace: 


[ArgumentNullException: Value cannot be null.
Parameter name: source]
   System.Linq.Enumerable.ToList(IEnumerable`1 source) +6101882
   MvcCheckBoxList.CheckBoxList_ModelBased(HtmlHelper`1 htmlHelper, ModelMetadata modelMetadata, String listName, Expression`1 sourceDataExpr, Expression`1 valueExpr, Expression`1 textToDisplayExpr, Expression`1 htmlAttributesExpr, Expression`1 selectedValuesExpr, Object htmlAttributes, HtmlListInfo wrapInfo, String[] disabledValues, Position position) +1169
   MvcCheckBoxList_Extensions_Model.CheckBoxListFor(HtmlHelper`1 htmlHelper, Expression`1 listNameExpr, Expression`1 sourceDataExpr, Expression`1 valueExpr, Expression`1 textToDisplayExpr, Expression`1 selectedValuesExpr, Position position, Expression`1 htmlAttributesExpr) +600
   ASP._Page_Areas_Client_Views_Stakeholder__Form_cshtml.Execute() in c:\inetpub\wwwroot\Navigator\Navigator\Areas\Client\Views\Stakeholder\_Form.cshtml:23
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +280
   System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +126
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +196
   System.Web.Mvc.Html.PartialExtensions.Partial(HtmlHelper htmlHelper, String partialViewName, Object model, ViewDataDictionary viewData) +158
   ASP._Page_Areas_Client_Views_Stakeholder_Edit_cshtml.Execute() in c:\inetpub\wwwroot\Navigator\Navigator\Areas\Client\Views\Stakeholder\Edit.cshtml:16
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +280
   System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +126
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +181
   System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +378
   System.Web.Mvc.<>c__DisplayClass1a.<InvokeActionResultWithFilters>b__17() +33
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +853420
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) +265
   System.Web.Mvc.Async.<>c__DisplayClass25.<BeginInvokeAction>b__22(IAsyncResult asyncResult) +837892
   System.Web.Mvc.<>c__DisplayClass1d.<BeginExecuteCore>b__18(IAsyncResult asyncResult) +28
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +15
   System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +65
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +15
   System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +51
   System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__3(IAsyncResult asyncResult) +42
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +15
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +51
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +606
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +288

    if (htmlHelper.ViewData.Model == null)
    {
        throw new NoNullAllowedException(this.empty_model_message);
    }

public class UserVM
{
       public IList<UserRoleVM> PreselectedUserRoles { get; set; }
       public IList<UserRoleVM> AllUserRoles { get; set; }
}

public class UserRoleVM
{
    public int Id {get; set;}
    public string Name {get; set;}
    public bool IsSelected {get; set;}
}

@Html.CheckBoxListFor(user => user.PostedUserRoles.UserRolesIds,
                                  user => user.AllUserRoles,
                                  x => x.Id,
                                  x => x.Name,
                                  ur => ur.IsSelected, // error here
                                  new { @class = "user-roles" })

@Html.CheckBoxListFor(user => user.PostedUserRoles.UserRolesIds,
                                  user => user.AllUserRoles,
                                  x => x.Id,
                                  x => x.Name,
                                  user => user.PreselectedUserRoles, // error here
                                  new { @class = "user-roles" })

// OK
@Html.CheckBoxListFor(user => user.PostedUserRoles.UserRolesIds,
                                  user => user.AllUserRoles,
                                  x => x.Id,
                                  x => x.Name,
                                  user => user.PreselectedUserRoles

// OK
@Html.CheckBoxListFor(user => user.PostedUserRoles.UserRolesIds,
                                  user => user.AllUserRoles,
                                  x => x.Id,
                                  x => x.Name,
                                  ur => ur.IsSelected)