ValidationMethodAttribute Class

Represents an attribute that can be used during validation.

Namespace:  Microsoft.VisualStudio.Modeling.Validation
Assembly:  Microsoft.VisualStudio.Modeling.Sdk (in Microsoft.VisualStudio.Modeling.Sdk.dll)

Syntax

'Declaration
<AttributeUsageAttribute(AttributeTargets.Method, AllowMultiple := True)> _
Public NotInheritable Class ValidationMethodAttribute _
    Inherits Attribute

'Usage
Dim instance As ValidationMethodAttribute

[AttributeUsageAttribute(AttributeTargets.Method, AllowMultiple = true)]
public sealed class ValidationMethodAttribute : Attribute

[AttributeUsageAttribute(AttributeTargets::Method, AllowMultiple = true)]
public ref class ValidationMethodAttribute sealed : public Attribute

public final class ValidationMethodAttribute extends Attribute

Remarks

The Categories property determines when the attribute is used.

For more information about validation, see Walkthrough: Adding Validation to a Domain Model.

Examples

The following example decorates a method in the Person class to be invoked when validation occurs. The ValidationCategories enumeration setting indicates when the method will be invoked.

[C#]

[ValidationMethod
(
    ValidationCategory.Open |
    ValidationCategory.Save |
    ValidationCategory.Menu
)
]
private void ValidateParentBirth(ValidationContext context)   
{
    foreach (Person parent in this.Parent)
    {
        if (this.Birth <= parent.Birth)
        {
        context.LogError(
            "Birth must be after parent's birth",
            "FamilyParentBirthError", 
            this, 
            parent);
        }
    }
}

Inheritance Hierarchy

System.Object
  System.Attribute
    Microsoft.VisualStudio.Modeling.Validation.ValidationMethodAttribute

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

See Also

Reference

ValidationMethodAttribute Members

Microsoft.VisualStudio.Modeling.Validation Namespace