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  • c# LINQ CMDB(SQL)

    如果数据库字段发生更改需要重新保存最新表到dbml

    新增

                //1.Create DB context
                AlexDBDataContext db = new AlexDBDataContext();
                //2.Create table object
                myUser myUser = new myUser
                {
                    ID = 5,
                    Name = "Robin",
                    Password = "143"
                };
                //Add new object to myuser collection
                db.myUser.InsertOnSubmit(myUser);
                //submit change to database
                try
                {
                    db.SubmitChanges();
                }
                catch (Exception e)
                {
                    Console.WriteLine(e);
                    throw;
                }

    更新

                //1.Create DB context
                AlexDBDataContext db = new AlexDBDataContext();
                var q = from user in db.myUser
                        where user.ID == 5
                        select user;
                //you want to change
                foreach (var item in q)
                {
                    item.Name = "SuperRonbin";
                }
                try
                {
                    //submit to database
                    db.SubmitChanges();
                }
                catch (Exception e)
                {
                    Console.WriteLine(e);
                }

    删除

                //1.Create DB context
                AlexDBDataContext db = new AlexDBDataContext();
                var q = from user in db.myUser
                        where user.ID == 5
                        select user;
                //you want to delete
                foreach (var item in q)
                {
                    db.myUser.DeleteOnSubmit(item);
                }
                try
                {
                    //submit to database
                    db.SubmitChanges();
                }
                catch (Exception e)
                {
                    Console.WriteLine(e);
                }
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  • 原文地址:https://www.cnblogs.com/tangpeng97/p/7907101.html
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