摘要
单条更新,批量更新。
正文
单条更新,批量更新。
正文
根据实体对象更新
var user = new wms_user
{
id = 1586977355308601346,
name = "李四2",
dept = "IT2",
duty = "程序员2",
hire_date = DateTime.Parse("2022-11-1"),
term_date = null
};
var ret= Db.Updateable(user).ExecuteCommand();
函数 | 说明 |
ExecuteCommand | 返回受影响行数 , update where 如果没找到那么就会返回 0 |
ExecuteCommandHasChange | 返回bool ,等同于 bool isChange= ExecuteCommand()>0 |
批量更新
List<wms_user> users = new List<wms_user>();
var user1 = new wms_user
{
id = 1586979335129141248,
name = "王五",
dept = "电气",
duty = "程序员",
hire_date = DateTime.Parse("2021-09-1"),
term_date = null
};
var user2 = new wms_user
{
id = 1586977355308601346,
name = "李四",
dept = "IT",
duty = "程序员",
hire_date = DateTime.Parse("2012-09-1"),
term_date = null
};
users.Add(user1);
users.Add(user2);
var ret= Db.Updateable(users).ExecuteCommand();
不更新某列
var user1 = new wms_user
{
id = 1586979335129141248,
name = "王五",
dept = "电气1",
duty = "工程师",
hire_date = DateTime.Parse("2021-12-23"),
term_date = null
};
var ret= Db.Updateable(user1).IgnoreColumns(it=>new {it.dept,it.hire_date }).ExecuteCommand();
只更新某列
var user1 = new wms_user
{
id = 1586979335129141248,
name = "王五A",
dept = "电气1",
duty = "工程师",
hire_date = DateTime.Parse("2021-12-23"),
term_date = null
};
var ret= Db.Updateable(user1).UpdateColumns(it => new {it.name,it.hire_date}).ExecuteCommand();
NULL列不更新
var ret= Db.Updateable(user1).IgnoreColumns(ignoreAllNullColumns:true).ExecuteCommand();
whereColumns子句更新
根据指定列更新
var user1 = new wms_user
{
id = 1586979335129141248,
name = "王五A",
dept = "电气1",
duty = "工程师2",
hire_date = DateTime.Parse("2020-12-23"),
term_date = null
};
var ret= Db.Updateable(user1).WhereColumns(x=>x.name).ExecuteCommand();
更新where条件
var user1 = new wms_user
{
id = 1586979335129141248,
name = "王五A",
dept = "电气12",
duty = "工程师21",
hire_date = DateTime.Parse("2020-01-23"),
term_date = null
};
var ret= Db.Updateable(user1).Where(x=>x.name== "王五A").ExecuteCommand();
大批量更新
List<wms_user> users = new List<wms_user>();
var user1 = new wms_user
{
id = 1586979335129141248,
name = "王五",
dept = "IT",
duty = "程序员",
hire_date = DateTime.Parse("2021-09-1"),
term_date = null
};
var user2 = new wms_user
{
id = 1586977355308601346,
name = "李四",
dept = "IT",
duty = "程序员",
hire_date = DateTime.Parse("2012-09-1"),
term_date = null
};
users.Add(user1);
users.Add(user2);
var ret = Db.Fastest<wms_user>().BulkUpdate(users);
根据表达式更新
var ret = Db.Updateable<wms_user>()
.SetColumns(it => new wms_user() { name = "张飞" })
.Where(it => it.id == 1586979335129141248)
.ExecuteCommand();
用SetColumns可以叠加更新
var ret = Db.Updateable<wms_user>()
.SetColumns(it =>it.name=="TOM")
.SetColumns(it=>it.dept=="演员")
.Where(it => it.id == 1586979335129141248)
.ExecuteCommand();
根据字典更新
var dc = new Dictionary<string, object>();
dc.Add("id", 1586977355308601346);
dc.Add("name", "张飞");
dc.Add("dept", "IT");
dc.Add("duty", "程序员");
dc.Add("hire_date", DateTime.Now.AddDays(-100));
var ret = Db.Updateable(dc).AS("wms_user").WhereColumns("id").ExecuteCommand();