LinqToSQL不更新数据库

Question

// goal: update Address record identified by "id", with new data in "colVal"

string cstr = ConnectionApi.GetSqlConnectionString("SwDb"); // get connection str
using (DataContext db = new DataContext(cstr)) {
    Address addr = (from a in db.GetTable<Address>()
                    where a.Id == id
                    select a).Single<Address>();
    addr.AddressLine1 = colValue.Trim();
    db.SubmitChanges(); // this seems to have no effect!!!
}

在调试器中,addr具有db表中的所有当前值,并且我可以在调用db.SubmitChanges()之前验证AddressLine1是否已更改... SQL Profiler在SubmitChanges行执行时仅显示"重置连接".任何人都知道为什么这不起作用？谢谢!

Answer 1

您可以使用GetChangeSet方法快速查看要提交的更改.

还要确保您的表已定义主键,并且映射知道此主键.否则您将无法执行更新.