SimpleSyncProvider.MetadataSchema Property
When overridden in a derived class, gets an ItemMetadataSchema object that represents the metadata schema for an item.
Namespace: Microsoft.Synchronization.SimpleProviders
Assembly: Microsoft.Synchronization.SimpleProviders (in Microsoft.Synchronization.SimpleProviders.dll)
Syntax
'Declaration
Public MustOverride ReadOnly Property MetadataSchema As ItemMetadataSchema
Get
'Usage
Dim instance As SimpleSyncProvider
Dim value As ItemMetadataSchema
value = instance.MetadataSchema
public abstract ItemMetadataSchema MetadataSchema { get; }
public:
virtual property ItemMetadataSchema^ MetadataSchema {
ItemMetadataSchema^ get () abstract;
}
abstract MetadataSchema : ItemMetadataSchema
abstract function get MetadataSchema () : ItemMetadataSchema
Property Value
Type: Microsoft.Synchronization.SimpleProviders.ItemMetadataSchema
An ItemMetadataSchema object that represents the metadata schema for an item.
Remarks
Sync Framework maps item store data, or additional metadata that you create, to internal metadata store IDs and versions by using an ItemMetadataSchema object that is exposed by the MetadataSchema property. For more information, see Managing Metadata for Simple Providers.
Examples
The following code examples provide input for the ItemMetadataSchema object. The constants in the sample code define an integer value for each column in the item store. These values are used when creating the custom field definitions and identity rules for the ItemMetadataSchema object. To view this code in the context of a complete application, see the "Sync101 using Simple Sync Provider" application that is available in the Sync Framework SDK and from Code Gallery.
public const uint CUSTOM_FIELD_ID = 1;
public const uint CUSTOM_FIELD_TIMESTAMP = 2;
public override ItemMetadataSchema MetadataSchema
{
get
{
CustomFieldDefinition[] customFields = new CustomFieldDefinition[2];
customFields[0] = new CustomFieldDefinition(CUSTOM_FIELD_ID, typeof(ulong));
customFields[1] = new CustomFieldDefinition(CUSTOM_FIELD_TIMESTAMP, typeof(ulong));
IdentityRule[] identityRule = new IdentityRule[1];
identityRule[0] = new IdentityRule(new uint[] { CUSTOM_FIELD_ID });
return new ItemMetadataSchema(customFields, identityRule);
}
}
Public Const CUSTOM_FIELD_ID As UInteger = 1
Public Const CUSTOM_FIELD_TIMESTAMP As UInteger = 2
Public Overrides ReadOnly Property MetadataSchema() As ItemMetadataSchema
Get
Dim customFields As CustomFieldDefinition() = New CustomFieldDefinition(1) {}
customFields(0) = New CustomFieldDefinition(CUSTOM_FIELD_ID, GetType(ULong))
customFields(1) = New CustomFieldDefinition(CUSTOM_FIELD_TIMESTAMP, GetType(ULong))
Dim identityRule As IdentityRule() = New IdentityRule(0) {}
identityRule(0) = New IdentityRule(New UInteger() {CUSTOM_FIELD_ID})
Return New ItemMetadataSchema(customFields, identityRule)
End Get
End Property