Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>For scalar and complex properties you can use the following to extract the changed property names of an entity <code>myEntity</code>:</p> <pre><code>var entry = context.Entry(myEntity); var namesOfChangedProperties = entry.CurrentValues.PropertyNames .Where(p =&gt; entry.Property(p).IsModified); </code></pre> <p>A few things to note here:</p> <ul> <li><p><code>CurrentValues.PropertyNames</code> only contains scalar and complex properties, not navigation properties.</p></li> <li><p>Complex properties means: Only the name of the complex property which is declared on the entity, not the actual individual properties of the complex type itself, for example: If you have this model...</p> <pre><code>[ComplexType] public class Address { public string Country { get; set; } public string City { get; set; } } public class Person { public int Id { get; set; } public string Name { get; set; } public Address Address { get; set; } } </code></pre> <p>... then, if <code>myEntity</code> is a <code>Person</code>, <code>CurrentValues.PropertyNames</code> would contain "<strong>Id</strong>", "<strong>Name</strong>" and "<strong>Address</strong>" but not "<strong>Address.Country</strong>" or "<strong>Address.City</strong>" (nor "<strong>Country</strong>" or "<strong>City</strong>").</p></li> <li><p>If a complex property is marked as modified (<code>.IsModified</code> in the code above is <code>true</code>) then this means that either the reference (<code>Person.Address</code> in the example above) has changed, no matter if actually the property values (<code>Country</code> and <code>City</code>) inside of the complex type have changed or not. Or that any of the properties of the complex type has changed (<code>Country</code> or <code>City</code> has changed). I believe it's not possible to find out which one, because EF always sends an UPDATE command for <em>all</em> complex type properties to the database, even if only one property has changed and the other remained unchanged. I would conclude from this that EF doesn't track changes of individual complex type properties.</p></li> </ul>
    singulars
    1. This table or related slice is empty.
    1. POEF 4.1 Code First - Determine What Properties Have Changed
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USPatrick Desjardins
    1. USSlauma
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POEF 4.1 Code First - Determine What Properties Have Changed
      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. VTAcceptedByOriginator
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COgreat, works for me with Entity framework 6 as well!
      singulars
      1. PO
      1. USJ King
 

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