private void ProcessTable(LinqMetaTable table, LinqMetaType rowType, string name, PropertyInfo prop)
{
DLinqTables.Add(new DLinqTableProvider(this, rowType, name, prop));
foreach (LinqMetaType derivedType in rowType.DerivedTypes)
{
ProcessTable(table, derivedType, derivedType.Name, prop);
}
}
/// <summary>
/// Set the DataLoadOptions on a Linq To Sql datasource to force all the FK entities
/// to be directly loaded.
/// </summary>
/// <param name="dataSource">The data source for which we want to preload FKs</param>
/// <param name="rowType">The type of the entities returned by the data source</param>
public static void LoadWithForeignKeys(this LinqDataSource dataSource, Type rowType)
{
dataSource.ContextCreated += delegate(object sender, LinqDataSourceStatusEventArgs e) {
// This only applies to a DLinq data context
var context = e.Result as DataContext;
if (context == null)
{
return;
}
DataLoadOptions loadOptions = null;
ParameterExpression tableParameter = null;
System.Data.Linq.Mapping.MetaTable metaTable = context.Mapping.GetTable(rowType);
foreach (System.Data.Linq.Mapping.MetaDataMember member in metaTable.RowType.DataMembers)
{
if (member.IsAssociation && !member.Association.IsMany)
{
if (member.Type.Equals(rowType))
{
continue;
}
if (loadOptions == null)
{
loadOptions = new DataLoadOptions();
tableParameter = Expression.Parameter(rowType, "e");
}
var memberExpression = Expression.Property(tableParameter, member.Name);
loadOptions.LoadWith(Expression.Lambda(memberExpression, tableParameter));
}
}
if (loadOptions != null)
{
context.LoadOptions = loadOptions;
}
};
}
public DLinqDataModelProvider(object contextInstance, Func <object> contextFactory)
{
ContextFactory = contextFactory;
DataContext context = (DataContext)contextInstance ?? (DataContext)CreateContext();
ContextType = context.GetType();
DLinqTables = new List <TableProvider>();
foreach (PropertyInfo prop in ContextType.GetProperties())
{
Type entityType = GetEntityType(prop);
if (entityType != null)
{
LinqMetaTable table = GetLinqTable(context, entityType);
ProcessTable(table, table.RowType, prop.Name, prop);
}
}
DLinqTables.ForEach(t => ((DLinqTableProvider)t).Initialize());
_roTables = new ReadOnlyCollection <TableProvider>(DLinqTables);
}
private void ProcessTable(LinqMetaTable table, LinqMetaType rowType, string name, PropertyInfo prop) {
DLinqTables.Add(new DLinqTableProvider(this, rowType, name, prop));
foreach (LinqMetaType derivedType in rowType.DerivedTypes)
ProcessTable(table, derivedType, derivedType.Name, prop);
}