/// <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));
}
/// <summary>
/// 设置需更新的实体对象
/// </summary>
/// <param name="source">source</param>
/// <param name="object">需更新的实体对象</param>
/// <typeparam name="T">元素类型</typeparam>
public static IUpdateable <T> Set <T>(this IUpdateable <T> source, object @object)
{
source.Properties.Clear();
IEntityObject entity = (IEntityObject)@object;
Type elementType = @object.GetType().BaseType;
var properties = @object.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance);
properties.Where(property => property.IsPrimaryKey() == false).Each(property =>
{
if (entity.ChangedProperties.Contains(property.Name))
{
ParameterExpression pe = Expression.Parameter(@object.GetType(), "s");
MemberExpression me = Expression.MakeMemberAccess(pe, property);
source.Set(me, property.EmitGetValue(@object));
}
});
return(source);
}
