/// <summary>
/// 将实体对象更新到数据库，调用该方法时实体对象必须具备主键属性
/// </summary>
/// <param name="object">实体对象</param>
public virtual int Update(object @object)
{
IEntityObject entity = (IEntityObject)@object;
Type elementType = @object.GetType().BaseType;
IUpdateable updateable = this.factory.CreateUpdateProvider(this).CreateUpdate(elementType);
var properties = @object.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance);
properties.Each(property =>
{
if (property.IsPrimaryKey() == false)
{
if (entity.ChangedProperties.Contains(property.Name))
{
ParameterExpression pe = Expression.Parameter(@object.GetType(), "s");
MemberExpression me = Expression.MakeMemberAccess(pe, property);
updateable.Set(me, property.EmitGetValue(@object));
}
}
else
{
ParameterExpression pe = Expression.Parameter(@object.GetType(), "s");
MemberExpression me = Expression.MakeMemberAccess(pe, property);
ConstantExpression ce = Expression.Constant(property.EmitGetValue(@object), property.PropertyType);
BinaryExpression be = Expression.Equal(me, ce);
updateable = updateable.Where(be);
}
});
return(updateable.Execute(elementType));
}
public static int Execute(this IUpdateable update, string message = null)
{
if (message != null)
{
return(SafeConsole.WaitRows(message == "auto" ? UnsafeMessage(update) : message,
() => update.Execute(message: null)));
}
using (HeavyProfiler.Log("DBUnsafeUpdate", () => update.EntityType.TypeName()))
{
if (update == null)
{
throw new ArgumentNullException("update");
}
using (Transaction tr = new Transaction())
{
Schema.Current.OnPreUnsafeUpdate(update);
int rows = DbQueryProvider.Single.Update(update, sql => (int)sql.ExecuteScalar());
return(tr.Commit(rows));
}
}
}
