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.