Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>There are (at least) two Methods to do this:</p> <h3>Method 1: The Simple Way</h3> <p>You would do this by adding logic in your view:</p> <pre><code>&lt;input type="button" disabled=&lt;%= Model.number &lt;= 0 %&gt; /&gt; </code></pre> <p>Where <code>Model.number</code> is the count of items passed to your view by your controller. If it's less than or equal to zero, <code>disabled</code> will be <code>true</code>.</p> <p>The syntax may not be exact, I haven't tried this, but this is the path I would go down to do what you want.</p> <p>This will work for the initial setting of the value; changing it without refreshing the page is a matter of using JavaScript, as other answers have pointed out.</p> <h3>Method 2: The overly complex but more 'MVC' way</h3> <p>If you want the logic in the controller rather than the view, you should set up a specific ViewModel object that you can add the logic to:</p> <h3>ViewModel</h3> <pre><code>public class MyObjectViewModel { MyObject MyObject {get; private set; } bool Enabled; {get; set; } public MyObjectViewModel(MyObject obj) { MyObject = obj; } string IsEnabled { get { if (Enabled) { return ""; } else return "disabled=disabled"; } } </code></pre> <h3>Controller</h3> <pre><code>public ActionResult Show(int id) { MyObject myObject = repository.GetMyObjectById(id) MyObjectViewModel movm = myObject; movm.Enabled = myObject.number &gt; 0; return View(movm); } </code></pre> <h3>View</h3> <pre><code>&lt;input type="button" &lt;%= Model.IsEnabled %&gt; /&gt; </code></pre> <p>Again, the syntax and usage may be a little off, I'm prototyping this off the top of my head, and am not in a location where I can test this for you.</p> <p>If you're interested in ViewModels, here are some good resources:</p> <ul> <li><a href="https://stackoverflow.com/questions/664205/viewmodel-best-practices">View Model Best Practices</a></li> <li><a href="http://stephenwalther.com/blog/archive/2009/04/13/asp.net-mvc-tip-50-ndash-create-view-models.aspx" rel="nofollow noreferrer">ASP.NET MVC Tip# 50: Create View Models</a></li> </ul> <p>I've updated it to return <code>disabled=disabled</code> using the string if it is actually disabled.</p>
    singulars
    1. This table or related slice is empty.
    1. POHow can I access attributes of Html elements in ASP.NET MVC
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USCommunity
    1. USGeorge Stocker
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POHow can I access attributes of Html elements in ASP.NET MVC
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    1. CO@George Stocker -- This is exactly what I want. I'll try it and get back here as that might also open other doors.
      singulars
      1. PO
      1. USRichard77
    2. CO@George Stocker - I think I would rather see that decision made in the controller than the view.
      singulars
      1. PO
      1. USMark
    3. CO@Mark @Richard77 : See updated answer, I added the logic you'd use if you wanted the controller to make the decision.
      singulars
      1. PO
      1. USGeorge Stocker
 

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