我正在尝试为实体框架创建一个查询,该查询将允许我获取 id 列表并更新与它们关联的字段.
I am trying to create a query for entity framework that will allow me to take a list of ids and update a field associated with them.
SQL 中的示例:
UPDATE Friends
SET msgSentBy = '1234'
WHERE id IN (1, 2, 3, 4)
如何将以上内容转化为实体框架?
How do I convert the above into entity framework?
如下所示
var idList=new int[]{1, 2, 3, 4};
using (var db=new SomeDatabaseContext())
{
var friends= db.Friends.Where(f=>idList.Contains(f.ID)).ToList();
friends.ForEach(a=>a.msgSentBy='1234');
db.SaveChanges();
}
您可以更新多个字段,如下所示
you can update multiple fields as below
friends.ForEach(a =>
{
a.property1 = value1;
a.property2 = value2;
});
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