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Hi,

I have used a data validation in the code behind of edmx file of entity framework as:
[Range(1, 5, ErrorMessage = "Enter a value between 1 and 5")]
C#
public global::System.Decimal UnitPrice
        {
            get
            {
                return _UnitPrice;
            }
            set
            {
                OnUnitPriceChanging(value);
                ReportPropertyChanging("UnitPrice");
                _UnitPrice = StructuralObject.SetValidValue(value);
                ReportPropertyChanged("UnitPrice");
                OnUnitPriceChanged();
            }
        }


When I use this entity on consuming application then it does not check the range validation.
Posted

1 solution

To achieve this you have to create a 2nd partial class for each entity class in EF and link it to a auxiliary class with substitute properties.

for example you have a generated
C#
class Product { public int UnitPrice{ get; set; } }

The generated class will always be marked as partial.

and now you have to create 2nd partial class file and add

C#
[MetadataType(typeof(ProductMetadata))]
public partial class Product 
{
    // it's possible to add logic and non-mapped properties here
}


public class ProductMetadata
{
   [Range(1, 5, ErrorMessage = "Enter a value between 1 and 5")]
    public int UnitPrice { get; set; }   // note the 'object' type
}


It will work.
Rate it if you find it as useful.
 
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