获取实体的表和字段名称

Question

我确定这是重复的，但我似乎无法在SO或谷歌上找到我想要的内容。

我正在设置数据审核，以通过Entity Framework 5（数据库优先）跟踪特定实体的更改。我正在使用单个日志表，它将跟踪字段/列级别的更改。我想跟踪表名（不是实体名）和列名（不是实体字段名）。

我使用MetaDataWorkspace尝试过很多东西，但似乎无法获得我想要的确切结果。我不包括元数据代码，因为它没有真正富有成效。请注意，我遇到的一个问题是我的实体在运行时实际上是一个动态代理。

这是我目前的代码：

IEnumerable<DbEntityEntry> entities =
        context.ChangeTracker.Entries()
            .Where(
                e =>
                e.State == EntityState.Added || e.State == EntityState.Modified);

bool auditingRequired = false;
var auditEntities = new List<AuditEntity>();


foreach (DbEntityEntry entity in entities)
{
    //IFullyAudited is a marker for the entities I want to track 
    if (!(entity.Entity is IFullyAudited)) continue;
    auditingRequired = true;

    //note that entity.Entity is actually a dynamic proxy here

    string tableName = ""; //how can I get the actual table name (not the entity name)

    //there would be different logic for adds and edits--this just covers edits
    foreach (string propertyName in entity.OriginalValues.PropertyNames)
    {
        string columnName = "";  //how can I get the actual column name?

        var currentValue = entity.CurrentValues.GetValue<object>(propertyName);
        var originalValue = entity.OriginalValues.GetValue<object>(propertyName);

        if (!Equals(currentValue, originalValue))
        {
            //just a fake/POCO, not a real EF Entity until I figure this out
            auditEntities.Add(new AuditEntity
                {
                    //save PK here as well
                    ColumnName = columnName,
                    TableName = tableName,
                    NewValue = currentValue.ToString(),
                    OldValue = originalValue.ToString()
                });
        }
    }
}

if (auditingRequired)
{
    //here I will add the audit entity to the context
}