SqlSugar/Src/Asp.Net/MySqlTest/Demos/2_Update.cs

using OrmTest.Models;
using SqlSugar;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace OrmTest.Demo
{
    public class Update : DemoBase
    {
        public static void Init()
        {
            var db = GetInstance();
            var updateObj = new Student() { Id = 1, Name = "jack", SchoolId = 0, CreateTime = Convert.ToDateTime("2017-05-21 09:56:12.610") };
            var updateObjs = new List<Student>() { updateObj, new Student() { Id = 2, Name = "sun", SchoolId = 0 } }.ToArray();
            db.IgnoreColumns.Add("TestId", "Student");
            //db.MappingColumns.Add("id","dbid", "Student");


            //update reutrn Update Count
            var t1 = db.Updateable(updateObj).ExecuteCommand();

            //Only  update  Name 
            var t3 = db.Updateable(updateObj).UpdateColumns(it => new { it.Name }).ExecuteCommand();
            var t3_1 = db.Updateable(updateObj).UpdateColumns(it => it=="Name").ExecuteCommand();


            //Ignore  Name and TestId
            var t4 = db.Updateable(updateObj).IgnoreColumns(it => new { it.Name, it.TestId }).ExecuteCommand();

            //Ignore  Name and TestId
            var t5 = db.Updateable(updateObj).IgnoreColumns(it => it == "Name" || it == "TestId").With(SqlWith.UpdLock).ExecuteCommand();


            //Use Lock
            var t6 = db.Updateable(updateObj).With(SqlWith.UpdLock).ExecuteCommand();

            //update List<T>
            var t7 = db.Updateable(updateObjs).ExecuteCommand();

            //Re Set Value
            var t8 = db.Updateable(updateObj)
                .ReSetValue(it => it.Name == (it.Name + 1)).ExecuteCommand();

            //Where By Expression
            var t9 = db.Updateable(updateObj).Where(it => it.Id == 1).ExecuteCommand();

            //Update By Expression  Where By Expression
            var t10 = db.Updateable<Student>()
                .UpdateColumns(it => new Student() { Name = "a", CreateTime = DateTime.Now })
                .Where(it => it.Id == 11).ExecuteCommand();

            //Rename 
            db.Updateable<School>().AS("Student").UpdateColumns(it => new School() { Name = "jack" }).Where(it => it.Id == 1).ExecuteCommand();
            //Update Student set Name='jack' Where Id=1

            //Column is null no update
            db.Updateable(updateObj).Where(true).ExecuteCommand();


            db.Updateable(new Student[] { new Student() { Id = 2, Name = "a2" }, new Student() { Id = 1, Name = "a1" } })
                 .UpdateColumns(it => new { it.Name, it.Id, it.SchoolId })
                 .WhereColumns(it=>new { it.SchoolId})
                 .Where(it => it.Id == 1)
                .ExecuteCommand();
        }
    }
}