//////////////////////////////////////////////////////////////////////////
/// 1st way:
/// This method demonstrates the direct access to the internal metadata
/// objects collection (MetadataContainer).
//////////////////////////////////////////////////////////////////////////
public void Way1(object sender, EventArgs e)
{
ActiveTabs = 0;
var queryBuilder1 = QueryBuilderStore.Get("LoadMetadata");
ResetQueryBuilderMetadata(queryBuilder1);
queryBuilder1.SyntaxProvider = new GenericSyntaxProvider();
// prevent QueryBuilder to request metadata
queryBuilder1.MetadataLoadingOptions.OfflineMode = true;
queryBuilder1.MetadataProvider = null;
MetadataContainer metadataContainer = queryBuilder1.MetadataContainer;
metadataContainer.BeginUpdate();
try
{
metadataContainer.Clear();
MetadataNamespace schemaDbo = metadataContainer.AddSchema("dbo");
// prepare metadata for table "Orders"
MetadataObject orders = schemaDbo.AddTable("Orders");
// fields
orders.AddField("OrderId");
orders.AddField("CustomerId");
// prepare metadata for table "Order Details"
MetadataObject orderDetails = schemaDbo.AddTable("Order Details");
// fields
orderDetails.AddField("OrderId");
orderDetails.AddField("ProductId");
// foreign keys
MetadataForeignKey foreignKey = orderDetails.AddForeignKey("OrderDetailsToOrders");
using (MetadataQualifiedName referencedName = new MetadataQualifiedName())
{
referencedName.Add("Orders");
referencedName.Add("dbo");
foreignKey.ReferencedObjectName = referencedName;
}
foreignKey.Fields.Add("OrderId");
foreignKey.ReferencedFields.Add("OrderId");
}
finally
{
metadataContainer.EndUpdate();
}
queryBuilder1.MetadataStructure.Refresh();
}
//////////////////////////////////////////////////////////////////////////
/// 1st way:
/// This method demonstrates the direct access to the internal metadata
/// objects collection (MetadataContainer).
//////////////////////////////////////////////////////////////////////////
private void btn1Way_Click(object sender, EventArgs e)
{
// prevent QueryBuilder to request metadata
QBuilder.MetadataLoadingOptions.OfflineMode = true;
QBuilder.MetadataProvider = null;
MetadataContainer metadataContainer = QBuilder.MetadataContainer;
metadataContainer.BeginUpdate();
try
{
metadataContainer.Clear();
MetadataNamespace schemaDbo = metadataContainer.AddSchema("dbo");
// prepare metadata for table "Orders"
MetadataObject orders = schemaDbo.AddTable("Orders");
// fields
orders.AddField("OrderId");
orders.AddField("CustomerId");
// prepare metadata for table "Order Details"
MetadataObject orderDetails = schemaDbo.AddTable("Order Details");
// fields
orderDetails.AddField("OrderId");
orderDetails.AddField("ProductId");
// foreign keys
MetadataForeignKey foreignKey = orderDetails.AddForeignKey("OrderDetailsToOrders");
using (MetadataQualifiedName referencedName = new MetadataQualifiedName())
{
referencedName.Add("Orders");
referencedName.Add("dbo");
foreignKey.ReferencedObjectName = referencedName;
}
foreignKey.Fields.Add("OrderId");
foreignKey.ReferencedFields.Add("OrderId");
}
finally
{
metadataContainer.EndUpdate();
}
QBuilder.InitializeDatabaseSchemaTree();
}
