HasChanges might return null when there are pending changes. This does not really match the documentation which says that Checks if any new, deleted, or changed entities are being tracked such that ...

If the hasChanges method returns true, then the save: method is called on the object context. This causes the object context to save changes to all new and edited entity objects.

CINCINNATI (AP) — Anytime there’s a debate about the NFL’s toughest division, teams in the AFC North are quick to point out the playoff appearances. Yep. Nobody can top them. The AFC North ...

尽管苹果把iCloud与CoreData之间的完美配合吹的天花乱坠，但在iOS7之前，想用iCloud同步CoreData数据简直就是噩梦，苹果自己也承认了之前的诸多bug和不稳定性，这让苹果不得不重新站出来说他们的工程师已经在iOS7中修复了bug，增强 ...

Peter returns to the topic of managing multiple users accessing the same row in a table using Entity Framework, but this time using code-first development. There are some unexpected issues to deal ...

If your provider calls HasChanges, your provider must specify which columns to test for changes. For example, ColumnChanges.Name will specify changes for the column name, while ColumnChanges.Type will ...

另外，您可以使用 HasChanges 方法检查数据集是否发生了更改。HasChanges 返回一个布尔值。 ADO.NET 批处理 返回的数据集包含当时已插入、删除或修改的行。但这里所说的当时是什么时间呢？这正是 ADO.NET 批处理 更新比较复杂的一个方面，必须与表行的当前状态一起处理。

Track changes in files using XML datasets with the DiffGram format. This format lets you track what has changed, and what hasn't.

Track changes in files using XML datasets with the DiffGram format. This format lets you track what has changed, and what hasn't.