Databases
StackOverflow2013
Postsdbo
POHow to retrieve value from ViewData when the object is not a string?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHow to retrieve value from ViewData when the object is not a string?
    primarykey
    data
    text
    <p>Here's the functionality I'd like to exploit: I've a class <strong>myClass</strong> and would like to iterate over a collection that contains all the properties of that class. I'd like to send the index of that collection along with the other data so that I can control the each sequence of the iteration. </p> <p>Here's simplified versions of a Action method and View (I'll use the same action-view for that functionality).</p> <p>1) Action</p> <pre><code>public ActionResult CreateHierarchy(int? index) { if(index &lt; PropertiesOfMyClass.Lenght) { //Other code omitted ViewData["index"] = ((index == null) ? 1 : index++); Return View(); } } </code></pre> <p>2)View</p> <pre><code>&lt;% Using(Html.BeginForm()){%&gt; //Other Code omitted &lt;% = Html.Hidden("Index", ViewData["index"])%&gt; &lt;input type = "submit" value = "Do someting"/&gt; &lt;%}%&gt; </code></pre> <p>I've also placed this at the bottom of the page so that I can check the value of the index, </p> <pre><code>&lt;% = ViewData["index"]%&gt; </code></pre> <p>Unfortunately, its not working. I'm getting only the number 1. I'm missing something? such as a cast for the Viewdata? Should I write something like this:</p> <pre><code>&lt;% = Html.Hidden("index", (int)ViewData["index"])%&gt; </code></pre> <p>It's not working either</p> <p>=======EDIT April 6th/08h37AM</p> <p>myClass's real name is Hierarchy, which contains several levels like this</p> <pre><code>public class Hierarchy { public int HierarchyID { get; set;} public string Level1 { get; set; } public string Level2 { get; set; } ---- public string Level7 { get; set; } } </code></pre> <p>Once I've the above properties in a collection, I can iterate that collection from Level1 to Level7 by turn (as value for each Level can have numerous sources). The index is important for me as rely on it to move forward or backward.</p> <p>Also I provided both the logic (1) in the action and in the View(2), so that one can follow how the index is passed back and forth between the action and the View. </p> <p>Thanks for helping</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USRichard77
    1. USRichard77
    plurals
    1. This table or related slice is empty.
    1. PL
      singulars
      1. LTDuplicate
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. COAny chance that PropertiesOfMyClass.Length is returning 1 or lower? What happens if you remove that conditional element so that regardless the index always increments?
      singulars
      1. POHow to retrieve value from ViewData when the object is not a string?
      1. USLazarus
    2. COI don't see `MyClass` in your code at all. From what you are describing, the code is producing exactly what it should be. Can you be more specific as to what exactly you are trying to do, and what exactly the result should be?
      singulars
      1. POHow to retrieve value from ViewData when the object is not a string?
      1. USNick Larsen
    3. COWhat calls this: CreateHierarchy(int? index)? Is there any chance you are always passing null into that, so instead of the int incrementing, it always evaluates to 1?
      singulars
      1. POHow to retrieve value from ViewData when the object is not a string?
      1. USSlackerCoder
 

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