DateTimeFormatter.ofPattern(“yyyy-MM-dd HH:mm:ss.S”)); 使用LocalDateTime#format()(或ZonedDateTime#format())以某种格式将...LocalDateTime 格式化为String。...date = new SimpleDateFormat(“yyyy-MM-dd HH:mm:ss.S”).parse(oldstring); 用于SimpleDateFormat#format()将格式化...newstring = new...
context.SaveChanges();//可以分次提交,也可以最后一次性提交给数据库vardeliveries =newList<DeliveryNote>{newDeliveryNote{ BillNo =string.Format("DN{0:yyyyMMdd}-006", DateTime.Today), TotalPrice=445566M, Contract=contracts.First(), Checker="张三"}, }; context.DeliveryNotes.AddRange(deliveries); ...
new DeliveryNote{ BillNo = string.Format("DN{0:yyyyMMdd}-006", DateTime.Today), TotalPrice=445566M, Contract=contracts.First(), Checker="张三"}, }; context.DeliveryNotes.AddRange(deliveries); context.SaveChanges();//可以分次提交,也可以最后一次性提交给数据库 } } 1. 2. 3. 4. 5. 6....
{publicstaticvoidMain(string[] args) {varlist =newList<string>(); list.Add("Shawn Lin"); list.Add($"Current Date: {DateTime.Now:yyyyMMdd}"); list.ForEach(item=>{ WriteLine(item); }); Console.WriteLine("Hello World!");try{//var connection = new SqlConnection("server=.;database=DB...
Note: If you need to convert int into a string to compare, the cast and convert should be used. Convert int to string in a table For this example, we use the following SQL query to create a table named dbo.workorder based on the Production.WorkOrder table from the Adventureworks database...
status, string remark, DateTime? startTime, DateTime? endTime) { var session = LiteSqlFactory.GetSession(); ISqlString sql = session.CreateSql(@" select t.*, u.real_name as OrderUserRealName from bs_order t left join sys_user u on t.order_userid=u.id where 1=1"); sql.AppendIf...
Assign empty string '' if datetime is null Assign EXEC output to Variable Assigning NULL value to column name using Case Statement of where is SQL SERVER 2008 atomic if not exists() and insert or update Attempt to fetch logical page (1:155534) in database 7 failed. It belongs to allocati...
status, string remark, DateTime? startTime, DateTime? endTime) { var session = LiteSqlFactory.GetSession(); ISqlString sql = session.CreateSql(@" select t.*, u.real_name as OrderUserRealName from bs_order t left join sys_user u on t.order_userid=u.id where 1=1"); sql.AppendIf...
status, string remark, DateTime? startTime, DateTime? endTime) { var session = DapperLiteFactory.GetSession(); ISqlString sql = session.Sql(@" select t.*, u.real_name as OrderUserRealName from bs_order t left join sys_user u on t.order_userid=u.id where 1=1"); sql.AppendIf(...
9stringdbName="SqlDB"; 10stringname=dbName+DateTime.Now.ToString("yyyyMMddHHmmss"); 11stringprocname; 12stringsql; 13//创建连接对象 14SqlConnection conn=newSqlConnection(GetConnStr()); 15conn.Open();//打开数据库连接 16//删除逻辑备份设备,但不会删掉备份的数据库文件 ...