Databases
StackOverflow2013
Postsdbo
POViewBag oddity in creating a MultiSelectList
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POViewBag oddity in creating a MultiSelectList
    primarykey
    data
    text
    <p>I have spent a lot of time scouring the various forums for help on MultiSelectLists in asp.net MVC3. Finally figured out how to solve my issue now I'm trying to cut down on my code and I've come across something weird with ViewBags. First the code, than I'll explain the behavior.</p> <p><strong>My function that creates the MultiSelectList to used by the Controller</strong></p> <pre><code>public MultiSelectList GetPermissionList(string[] selectedValues) { List&lt;SelectListItem&gt; permissions = new List&lt;SelectListItem&gt;() { new SelectListItem{ Value = "", Text = "None"}, new SelectListItem{ Value = "View", Text = "View"}, new SelectListItem{ Value = "Add", Text = "Add"}, new SelectListItem{ Value = "Edit", Text = "Edit"}, new SelectListItem{ Value = "Delete", Text = "Delete"} }; return new MultiSelectList(permissions, "Value", "Text", selectedValues); } </code></pre> <p><strong>partial code from the edit action from the controller</strong> </p> <pre><code>public ActionResult Edit(int id) { ViewBag.Title = "Edit a Security Role"; SecurityRoles securityroles = Repository.Details(id); ViewBag.Orders = securityroles.Orders.Split(','); ViewBag.OrdersListBox = GetPermissionList(ViewBag.Orders); return View(securityroles); } </code></pre> <p><strong>partial code from the View</strong></p> <pre><code>&lt;td class="rightAlign topAlign editor-label"&gt; @Html.MyLabel(m =&gt; m.Orders, "lblOrders") &lt;/td&gt; &lt;td class="editor-field"&gt; @Html.ListBoxFor(m =&gt; m.Orders, ViewBag.OrdersListBox as MultiSelectList, new { size = "5" }) &lt;/td&gt; </code></pre> <p>Keep in mind I've cut out a large chunk of code from the edit Action, I have roughly 9 list boxes I'm creating for this security role manager.</p> <p>My goal, in the edit action is to simply have 1 line of code, calling the <strong>GetPermissionList</strong> and having it return to the viewbag so I can just display that in the view, as opposed to the 2 lines per listbox that I currently have.</p> <p>Just looking at the code, it seems obvious if I were to make the call this way:</p> <blockquote> <p>ViewBag.OrdersListBox = GetPermissionList(securityroles.Orders.Split(','));</p> </blockquote> <p>It should work, but the selected values do not come through. To compound the oddity, here is something else I tried and it worked fine, but it makes no sense why.</p> <blockquote> <p>ViewBag.Orders = securityroles.Orders.Split(',');</p> <p>ViewBag.OrdersListBox = GetPermissionList(securityroles.Orders.Split(','));</p> </blockquote> <p><strong>ViewBag.Orders</strong> plays no role in the <strong>ViewBag.OrdersListBox</strong> nor is it used in the view, but when I simply assign it a value than the 2nd line of code works.</p> <p>Does this make sense to anyone? Any suggestions on how to create a way for the <strong>GetPermissionList</strong> to simply work correctly by sending it a string array instead of passing it the ViewBag object?</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. UStereško
    1. UShyro78
    plurals
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POViewBag oddity in creating a MultiSelectList
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POViewBag oddity in creating a MultiSelectList
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POViewBag oddity in creating a MultiSelectList
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    1. COif you set a breakpoint right after the linke ViewBag.OrdersListBox = GetPermissionList(securityroles.Orders.Split(',')); does it have a value? What about just adding a ToArray() to the end of the split. just a shot in the dark
      singulars
      1. POViewBag oddity in creating a MultiSelectList
      1. USRyand.Johnson
    2. COI tried adding ToArray(), same issue with no values being selected. I also added a breakpoint at the suggested line and the values being passed are correct. I just can't wrap my head around the logic why cutting out that first ViewBag object won't work.
      singulars
      1. POViewBag oddity in creating a MultiSelectList
      1. UShyro78
 

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